195801d700
The Big QEMU Lock (BQL) has many names and they are confusing. The actual QemuMutex variable is called qemu_global_mutex but it's commonly referred to as the BQL in discussions and some code comments. The locking APIs, however, are called qemu_mutex_lock_iothread() and qemu_mutex_unlock_iothread(). The "iothread" name is historic and comes from when the main thread was split into into KVM vcpu threads and the "iothread" (now called the main loop thread). I have contributed to the confusion myself by introducing a separate --object iothread, a separate concept unrelated to the BQL. The "iothread" name is no longer appropriate for the BQL. Rename the locking APIs to: - void bql_lock(void) - void bql_unlock(void) - bool bql_locked(void) There are more APIs with "iothread" in their names. Subsequent patches will rename them. There are also comments and documentation that will be updated in later patches. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Paul Durrant <paul@xen.org> Acked-by: Fabiano Rosas <farosas@suse.de> Acked-by: David Woodhouse <dwmw@amazon.co.uk> Reviewed-by: Cédric Le Goater <clg@kaod.org> Acked-by: Peter Xu <peterx@redhat.com> Acked-by: Eric Farman <farman@linux.ibm.com> Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com> Acked-by: Hyman Huang <yong.huang@smartx.com> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Message-id: 20240102153529.486531-2-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2657 lines
77 KiB
C
2657 lines
77 KiB
C
/*
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* QEMU S390x KVM implementation
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*
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* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
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* Copyright IBM Corp. 2012
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include <sys/ioctl.h>
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#include <linux/kvm.h>
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#include <asm/ptrace.h>
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#include "cpu.h"
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#include "s390x-internal.h"
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#include "kvm_s390x.h"
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#include "sysemu/kvm_int.h"
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#include "qemu/cutils.h"
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#include "qapi/error.h"
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#include "qemu/error-report.h"
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#include "qemu/timer.h"
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#include "qemu/units.h"
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#include "qemu/main-loop.h"
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#include "qemu/mmap-alloc.h"
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#include "qemu/log.h"
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#include "sysemu/sysemu.h"
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#include "sysemu/hw_accel.h"
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#include "sysemu/runstate.h"
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#include "sysemu/device_tree.h"
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#include "exec/gdbstub.h"
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#include "exec/ram_addr.h"
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#include "trace.h"
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#include "hw/s390x/s390-pci-inst.h"
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#include "hw/s390x/s390-pci-bus.h"
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#include "hw/s390x/ipl.h"
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#include "hw/s390x/ebcdic.h"
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#include "exec/memattrs.h"
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#include "hw/s390x/s390-virtio-ccw.h"
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#include "hw/s390x/s390-virtio-hcall.h"
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#include "target/s390x/kvm/pv.h"
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#define kvm_vm_check_mem_attr(s, attr) \
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kvm_vm_check_attr(s, KVM_S390_VM_MEM_CTRL, attr)
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#define IPA0_DIAG 0x8300
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#define IPA0_SIGP 0xae00
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#define IPA0_B2 0xb200
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#define IPA0_B9 0xb900
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#define IPA0_EB 0xeb00
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#define IPA0_E3 0xe300
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#define PRIV_B2_SCLP_CALL 0x20
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#define PRIV_B2_CSCH 0x30
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#define PRIV_B2_HSCH 0x31
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#define PRIV_B2_MSCH 0x32
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#define PRIV_B2_SSCH 0x33
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#define PRIV_B2_STSCH 0x34
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#define PRIV_B2_TSCH 0x35
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#define PRIV_B2_TPI 0x36
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#define PRIV_B2_SAL 0x37
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#define PRIV_B2_RSCH 0x38
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#define PRIV_B2_STCRW 0x39
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#define PRIV_B2_STCPS 0x3a
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#define PRIV_B2_RCHP 0x3b
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#define PRIV_B2_SCHM 0x3c
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#define PRIV_B2_CHSC 0x5f
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#define PRIV_B2_SIGA 0x74
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#define PRIV_B2_XSCH 0x76
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#define PRIV_EB_SQBS 0x8a
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#define PRIV_EB_PCISTB 0xd0
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#define PRIV_EB_SIC 0xd1
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#define PRIV_B9_EQBS 0x9c
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#define PRIV_B9_CLP 0xa0
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#define PRIV_B9_PTF 0xa2
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#define PRIV_B9_PCISTG 0xd0
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#define PRIV_B9_PCILG 0xd2
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#define PRIV_B9_RPCIT 0xd3
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#define PRIV_E3_MPCIFC 0xd0
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#define PRIV_E3_STPCIFC 0xd4
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#define DIAG_TIMEREVENT 0x288
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#define DIAG_IPL 0x308
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#define DIAG_SET_CONTROL_PROGRAM_CODES 0x318
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#define DIAG_KVM_HYPERCALL 0x500
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#define DIAG_KVM_BREAKPOINT 0x501
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#define ICPT_INSTRUCTION 0x04
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#define ICPT_PROGRAM 0x08
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#define ICPT_EXT_INT 0x14
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#define ICPT_WAITPSW 0x1c
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#define ICPT_SOFT_INTERCEPT 0x24
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#define ICPT_CPU_STOP 0x28
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#define ICPT_OPEREXC 0x2c
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#define ICPT_IO 0x40
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#define ICPT_PV_INSTR 0x68
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#define ICPT_PV_INSTR_NOTIFICATION 0x6c
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#define NR_LOCAL_IRQS 32
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/*
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* Needs to be big enough to contain max_cpus emergency signals
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* and in addition NR_LOCAL_IRQS interrupts
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*/
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#define VCPU_IRQ_BUF_SIZE(max_cpus) (sizeof(struct kvm_s390_irq) * \
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(max_cpus + NR_LOCAL_IRQS))
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/*
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* KVM does only support memory slots up to KVM_MEM_MAX_NR_PAGES pages
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* as the dirty bitmap must be managed by bitops that take an int as
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* position indicator. This would end at an unaligned address
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* (0x7fffff00000). As future variants might provide larger pages
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* and to make all addresses properly aligned, let us split at 4TB.
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*/
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#define KVM_SLOT_MAX_BYTES (4UL * TiB)
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static CPUWatchpoint hw_watchpoint;
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/*
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* We don't use a list because this structure is also used to transmit the
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* hardware breakpoints to the kernel.
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*/
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static struct kvm_hw_breakpoint *hw_breakpoints;
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static int nb_hw_breakpoints;
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const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
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KVM_CAP_LAST_INFO
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};
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static int cap_async_pf;
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static int cap_mem_op;
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static int cap_mem_op_extension;
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static int cap_s390_irq;
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static int cap_ri;
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static int cap_hpage_1m;
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static int cap_vcpu_resets;
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static int cap_protected;
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static int cap_zpci_op;
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static int cap_protected_dump;
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static bool mem_op_storage_key_support;
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static int active_cmma;
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static int kvm_s390_query_mem_limit(uint64_t *memory_limit)
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{
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struct kvm_device_attr attr = {
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.group = KVM_S390_VM_MEM_CTRL,
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.attr = KVM_S390_VM_MEM_LIMIT_SIZE,
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.addr = (uint64_t) memory_limit,
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};
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return kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
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}
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int kvm_s390_set_mem_limit(uint64_t new_limit, uint64_t *hw_limit)
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{
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int rc;
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struct kvm_device_attr attr = {
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.group = KVM_S390_VM_MEM_CTRL,
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.attr = KVM_S390_VM_MEM_LIMIT_SIZE,
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.addr = (uint64_t) &new_limit,
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};
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if (!kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_LIMIT_SIZE)) {
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return 0;
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}
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rc = kvm_s390_query_mem_limit(hw_limit);
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if (rc) {
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return rc;
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} else if (*hw_limit < new_limit) {
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return -E2BIG;
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}
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return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
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}
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int kvm_s390_cmma_active(void)
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{
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return active_cmma;
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}
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static bool kvm_s390_cmma_available(void)
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{
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static bool initialized, value;
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if (!initialized) {
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initialized = true;
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value = kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_ENABLE_CMMA) &&
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kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_CLR_CMMA);
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}
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return value;
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}
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void kvm_s390_cmma_reset(void)
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{
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int rc;
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struct kvm_device_attr attr = {
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.group = KVM_S390_VM_MEM_CTRL,
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.attr = KVM_S390_VM_MEM_CLR_CMMA,
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};
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if (!kvm_s390_cmma_active()) {
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return;
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}
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rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
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trace_kvm_clear_cmma(rc);
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}
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static void kvm_s390_enable_cmma(void)
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{
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int rc;
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struct kvm_device_attr attr = {
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.group = KVM_S390_VM_MEM_CTRL,
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.attr = KVM_S390_VM_MEM_ENABLE_CMMA,
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};
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if (cap_hpage_1m) {
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warn_report("CMM will not be enabled because it is not "
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"compatible with huge memory backings.");
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return;
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}
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rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
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active_cmma = !rc;
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trace_kvm_enable_cmma(rc);
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}
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static void kvm_s390_set_crypto_attr(uint64_t attr)
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{
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struct kvm_device_attr attribute = {
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.group = KVM_S390_VM_CRYPTO,
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.attr = attr,
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};
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int ret = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute);
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if (ret) {
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error_report("Failed to set crypto device attribute %lu: %s",
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attr, strerror(-ret));
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}
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}
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static void kvm_s390_init_aes_kw(void)
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{
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uint64_t attr = KVM_S390_VM_CRYPTO_DISABLE_AES_KW;
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if (object_property_get_bool(OBJECT(qdev_get_machine()), "aes-key-wrap",
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NULL)) {
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attr = KVM_S390_VM_CRYPTO_ENABLE_AES_KW;
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}
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if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) {
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kvm_s390_set_crypto_attr(attr);
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}
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}
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static void kvm_s390_init_dea_kw(void)
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{
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uint64_t attr = KVM_S390_VM_CRYPTO_DISABLE_DEA_KW;
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if (object_property_get_bool(OBJECT(qdev_get_machine()), "dea-key-wrap",
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NULL)) {
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attr = KVM_S390_VM_CRYPTO_ENABLE_DEA_KW;
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}
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if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) {
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kvm_s390_set_crypto_attr(attr);
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}
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}
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void kvm_s390_crypto_reset(void)
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{
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if (s390_has_feat(S390_FEAT_MSA_EXT_3)) {
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kvm_s390_init_aes_kw();
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kvm_s390_init_dea_kw();
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}
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}
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void kvm_s390_set_max_pagesize(uint64_t pagesize, Error **errp)
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{
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if (pagesize == 4 * KiB) {
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return;
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}
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if (!hpage_1m_allowed()) {
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error_setg(errp, "This QEMU machine does not support huge page "
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"mappings");
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return;
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}
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if (pagesize != 1 * MiB) {
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error_setg(errp, "Memory backing with 2G pages was specified, "
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"but KVM does not support this memory backing");
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return;
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}
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if (kvm_vm_enable_cap(kvm_state, KVM_CAP_S390_HPAGE_1M, 0)) {
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error_setg(errp, "Memory backing with 1M pages was specified, "
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"but KVM does not support this memory backing");
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return;
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}
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cap_hpage_1m = 1;
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}
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int kvm_s390_get_hpage_1m(void)
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{
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return cap_hpage_1m;
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}
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static void ccw_machine_class_foreach(ObjectClass *oc, void *opaque)
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{
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MachineClass *mc = MACHINE_CLASS(oc);
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mc->default_cpu_type = S390_CPU_TYPE_NAME("host");
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}
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int kvm_arch_get_default_type(MachineState *ms)
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{
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return 0;
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}
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int kvm_arch_init(MachineState *ms, KVMState *s)
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{
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int required_caps[] = {
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KVM_CAP_DEVICE_CTRL,
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KVM_CAP_SYNC_REGS,
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};
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for (int i = 0; i < ARRAY_SIZE(required_caps); i++) {
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if (!kvm_check_extension(s, required_caps[i])) {
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error_report("KVM is missing capability #%d - "
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"please use kernel 3.15 or newer", required_caps[i]);
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return -1;
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}
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}
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object_class_foreach(ccw_machine_class_foreach, TYPE_S390_CCW_MACHINE,
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false, NULL);
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if (!kvm_check_extension(s, KVM_CAP_S390_COW)) {
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error_report("KVM is missing capability KVM_CAP_S390_COW - "
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"unsupported environment");
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return -1;
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}
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cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
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cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP);
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cap_mem_op_extension = kvm_check_extension(s, KVM_CAP_S390_MEM_OP_EXTENSION);
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mem_op_storage_key_support = cap_mem_op_extension > 0;
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cap_s390_irq = kvm_check_extension(s, KVM_CAP_S390_INJECT_IRQ);
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cap_vcpu_resets = kvm_check_extension(s, KVM_CAP_S390_VCPU_RESETS);
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cap_protected = kvm_check_extension(s, KVM_CAP_S390_PROTECTED);
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cap_zpci_op = kvm_check_extension(s, KVM_CAP_S390_ZPCI_OP);
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cap_protected_dump = kvm_check_extension(s, KVM_CAP_S390_PROTECTED_DUMP);
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kvm_vm_enable_cap(s, KVM_CAP_S390_USER_SIGP, 0);
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kvm_vm_enable_cap(s, KVM_CAP_S390_VECTOR_REGISTERS, 0);
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kvm_vm_enable_cap(s, KVM_CAP_S390_USER_STSI, 0);
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kvm_vm_enable_cap(s, KVM_CAP_S390_CPU_TOPOLOGY, 0);
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if (ri_allowed()) {
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if (kvm_vm_enable_cap(s, KVM_CAP_S390_RI, 0) == 0) {
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cap_ri = 1;
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}
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}
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if (cpu_model_allowed()) {
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kvm_vm_enable_cap(s, KVM_CAP_S390_GS, 0);
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}
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/*
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* The migration interface for ais was introduced with kernel 4.13
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* but the capability itself had been active since 4.12. As migration
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* support is considered necessary, we only try to enable this for
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* newer machine types if KVM_CAP_S390_AIS_MIGRATION is available.
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*/
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if (cpu_model_allowed() && kvm_kernel_irqchip_allowed() &&
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kvm_check_extension(s, KVM_CAP_S390_AIS_MIGRATION)) {
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kvm_vm_enable_cap(s, KVM_CAP_S390_AIS, 0);
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}
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kvm_set_max_memslot_size(KVM_SLOT_MAX_BYTES);
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return 0;
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}
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int kvm_arch_irqchip_create(KVMState *s)
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{
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return 0;
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}
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unsigned long kvm_arch_vcpu_id(CPUState *cpu)
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{
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return cpu->cpu_index;
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}
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int kvm_arch_init_vcpu(CPUState *cs)
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{
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unsigned int max_cpus = MACHINE(qdev_get_machine())->smp.max_cpus;
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S390CPU *cpu = S390_CPU(cs);
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kvm_s390_set_cpu_state(cpu, cpu->env.cpu_state);
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cpu->irqstate = g_malloc0(VCPU_IRQ_BUF_SIZE(max_cpus));
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return 0;
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}
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int kvm_arch_destroy_vcpu(CPUState *cs)
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{
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S390CPU *cpu = S390_CPU(cs);
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g_free(cpu->irqstate);
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cpu->irqstate = NULL;
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return 0;
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}
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static void kvm_s390_reset_vcpu(S390CPU *cpu, unsigned long type)
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{
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CPUState *cs = CPU(cpu);
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/*
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* The reset call is needed here to reset in-kernel vcpu data that
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* we can't access directly from QEMU (i.e. with older kernels
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* which don't support sync_regs/ONE_REG). Before this ioctl
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* cpu_synchronize_state() is called in common kvm code
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* (kvm-all).
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*/
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if (kvm_vcpu_ioctl(cs, type)) {
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error_report("CPU reset failed on CPU %i type %lx",
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cs->cpu_index, type);
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}
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}
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|
|
void kvm_s390_reset_vcpu_initial(S390CPU *cpu)
|
|
{
|
|
kvm_s390_reset_vcpu(cpu, KVM_S390_INITIAL_RESET);
|
|
}
|
|
|
|
void kvm_s390_reset_vcpu_clear(S390CPU *cpu)
|
|
{
|
|
if (cap_vcpu_resets) {
|
|
kvm_s390_reset_vcpu(cpu, KVM_S390_CLEAR_RESET);
|
|
} else {
|
|
kvm_s390_reset_vcpu(cpu, KVM_S390_INITIAL_RESET);
|
|
}
|
|
}
|
|
|
|
void kvm_s390_reset_vcpu_normal(S390CPU *cpu)
|
|
{
|
|
if (cap_vcpu_resets) {
|
|
kvm_s390_reset_vcpu(cpu, KVM_S390_NORMAL_RESET);
|
|
}
|
|
}
|
|
|
|
static int can_sync_regs(CPUState *cs, int regs)
|
|
{
|
|
return (cs->kvm_run->kvm_valid_regs & regs) == regs;
|
|
}
|
|
|
|
#define KVM_SYNC_REQUIRED_REGS (KVM_SYNC_GPRS | KVM_SYNC_ACRS | \
|
|
KVM_SYNC_CRS | KVM_SYNC_PREFIX)
|
|
|
|
int kvm_arch_put_registers(CPUState *cs, int level)
|
|
{
|
|
S390CPU *cpu = S390_CPU(cs);
|
|
CPUS390XState *env = &cpu->env;
|
|
struct kvm_fpu fpu = {};
|
|
int r;
|
|
int i;
|
|
|
|
g_assert(can_sync_regs(cs, KVM_SYNC_REQUIRED_REGS));
|
|
|
|
/* always save the PSW and the GPRS*/
|
|
cs->kvm_run->psw_addr = env->psw.addr;
|
|
cs->kvm_run->psw_mask = env->psw.mask;
|
|
|
|
memcpy(cs->kvm_run->s.regs.gprs, env->regs, sizeof(cs->kvm_run->s.regs.gprs));
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GPRS;
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_VRS)) {
|
|
for (i = 0; i < 32; i++) {
|
|
cs->kvm_run->s.regs.vrs[i][0] = env->vregs[i][0];
|
|
cs->kvm_run->s.regs.vrs[i][1] = env->vregs[i][1];
|
|
}
|
|
cs->kvm_run->s.regs.fpc = env->fpc;
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_VRS;
|
|
} else if (can_sync_regs(cs, KVM_SYNC_FPRS)) {
|
|
for (i = 0; i < 16; i++) {
|
|
cs->kvm_run->s.regs.fprs[i] = *get_freg(env, i);
|
|
}
|
|
cs->kvm_run->s.regs.fpc = env->fpc;
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_FPRS;
|
|
} else {
|
|
/* Floating point */
|
|
for (i = 0; i < 16; i++) {
|
|
fpu.fprs[i] = *get_freg(env, i);
|
|
}
|
|
fpu.fpc = env->fpc;
|
|
|
|
r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
}
|
|
|
|
/* Do we need to save more than that? */
|
|
if (level == KVM_PUT_RUNTIME_STATE) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Access registers, control registers and the prefix - these are
|
|
* always available via kvm_sync_regs in the kernels that we support
|
|
*/
|
|
memcpy(cs->kvm_run->s.regs.acrs, env->aregs, sizeof(cs->kvm_run->s.regs.acrs));
|
|
memcpy(cs->kvm_run->s.regs.crs, env->cregs, sizeof(cs->kvm_run->s.regs.crs));
|
|
cs->kvm_run->s.regs.prefix = env->psa;
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ACRS | KVM_SYNC_CRS | KVM_SYNC_PREFIX;
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_ARCH0)) {
|
|
cs->kvm_run->s.regs.cputm = env->cputm;
|
|
cs->kvm_run->s.regs.ckc = env->ckc;
|
|
cs->kvm_run->s.regs.todpr = env->todpr;
|
|
cs->kvm_run->s.regs.gbea = env->gbea;
|
|
cs->kvm_run->s.regs.pp = env->pp;
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ARCH0;
|
|
} else {
|
|
/*
|
|
* These ONE_REGS are not protected by a capability. As they are only
|
|
* necessary for migration we just trace a possible error, but don't
|
|
* return with an error return code.
|
|
*/
|
|
kvm_set_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm);
|
|
kvm_set_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc);
|
|
kvm_set_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr);
|
|
kvm_set_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea);
|
|
kvm_set_one_reg(cs, KVM_REG_S390_PP, &env->pp);
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_RICCB)) {
|
|
memcpy(cs->kvm_run->s.regs.riccb, env->riccb, 64);
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_RICCB;
|
|
}
|
|
|
|
/* pfault parameters */
|
|
if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {
|
|
cs->kvm_run->s.regs.pft = env->pfault_token;
|
|
cs->kvm_run->s.regs.pfs = env->pfault_select;
|
|
cs->kvm_run->s.regs.pfc = env->pfault_compare;
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PFAULT;
|
|
} else if (cap_async_pf) {
|
|
r = kvm_set_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
r = kvm_set_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
r = kvm_set_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_GSCB)) {
|
|
memcpy(cs->kvm_run->s.regs.gscb, env->gscb, 32);
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GSCB;
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_BPBC)) {
|
|
cs->kvm_run->s.regs.bpbc = env->bpbc;
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_BPBC;
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_ETOKEN)) {
|
|
cs->kvm_run->s.regs.etoken = env->etoken;
|
|
cs->kvm_run->s.regs.etoken_extension = env->etoken_extension;
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ETOKEN;
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_DIAG318)) {
|
|
cs->kvm_run->s.regs.diag318 = env->diag318_info;
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_DIAG318;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_get_registers(CPUState *cs)
|
|
{
|
|
S390CPU *cpu = S390_CPU(cs);
|
|
CPUS390XState *env = &cpu->env;
|
|
struct kvm_fpu fpu;
|
|
int i, r;
|
|
|
|
/* get the PSW */
|
|
env->psw.addr = cs->kvm_run->psw_addr;
|
|
env->psw.mask = cs->kvm_run->psw_mask;
|
|
|
|
/* the GPRS, ACRS and CRS */
|
|
g_assert(can_sync_regs(cs, KVM_SYNC_REQUIRED_REGS));
|
|
memcpy(env->regs, cs->kvm_run->s.regs.gprs, sizeof(env->regs));
|
|
memcpy(env->aregs, cs->kvm_run->s.regs.acrs, sizeof(env->aregs));
|
|
memcpy(env->cregs, cs->kvm_run->s.regs.crs, sizeof(env->cregs));
|
|
|
|
/* The prefix */
|
|
env->psa = cs->kvm_run->s.regs.prefix;
|
|
|
|
/* Floating point and vector registers */
|
|
if (can_sync_regs(cs, KVM_SYNC_VRS)) {
|
|
for (i = 0; i < 32; i++) {
|
|
env->vregs[i][0] = cs->kvm_run->s.regs.vrs[i][0];
|
|
env->vregs[i][1] = cs->kvm_run->s.regs.vrs[i][1];
|
|
}
|
|
env->fpc = cs->kvm_run->s.regs.fpc;
|
|
} else if (can_sync_regs(cs, KVM_SYNC_FPRS)) {
|
|
for (i = 0; i < 16; i++) {
|
|
*get_freg(env, i) = cs->kvm_run->s.regs.fprs[i];
|
|
}
|
|
env->fpc = cs->kvm_run->s.regs.fpc;
|
|
} else {
|
|
r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
for (i = 0; i < 16; i++) {
|
|
*get_freg(env, i) = fpu.fprs[i];
|
|
}
|
|
env->fpc = fpu.fpc;
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_ARCH0)) {
|
|
env->cputm = cs->kvm_run->s.regs.cputm;
|
|
env->ckc = cs->kvm_run->s.regs.ckc;
|
|
env->todpr = cs->kvm_run->s.regs.todpr;
|
|
env->gbea = cs->kvm_run->s.regs.gbea;
|
|
env->pp = cs->kvm_run->s.regs.pp;
|
|
} else {
|
|
/*
|
|
* These ONE_REGS are not protected by a capability. As they are only
|
|
* necessary for migration we just trace a possible error, but don't
|
|
* return with an error return code.
|
|
*/
|
|
kvm_get_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm);
|
|
kvm_get_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc);
|
|
kvm_get_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr);
|
|
kvm_get_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea);
|
|
kvm_get_one_reg(cs, KVM_REG_S390_PP, &env->pp);
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_RICCB)) {
|
|
memcpy(env->riccb, cs->kvm_run->s.regs.riccb, 64);
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_GSCB)) {
|
|
memcpy(env->gscb, cs->kvm_run->s.regs.gscb, 32);
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_BPBC)) {
|
|
env->bpbc = cs->kvm_run->s.regs.bpbc;
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_ETOKEN)) {
|
|
env->etoken = cs->kvm_run->s.regs.etoken;
|
|
env->etoken_extension = cs->kvm_run->s.regs.etoken_extension;
|
|
}
|
|
|
|
/* pfault parameters */
|
|
if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {
|
|
env->pfault_token = cs->kvm_run->s.regs.pft;
|
|
env->pfault_select = cs->kvm_run->s.regs.pfs;
|
|
env->pfault_compare = cs->kvm_run->s.regs.pfc;
|
|
} else if (cap_async_pf) {
|
|
r = kvm_get_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
r = kvm_get_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
r = kvm_get_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
}
|
|
|
|
if (can_sync_regs(cs, KVM_SYNC_DIAG318)) {
|
|
env->diag318_info = cs->kvm_run->s.regs.diag318;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvm_s390_get_clock(uint8_t *tod_high, uint64_t *tod_low)
|
|
{
|
|
int r;
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_TOD,
|
|
.attr = KVM_S390_VM_TOD_LOW,
|
|
.addr = (uint64_t)tod_low,
|
|
};
|
|
|
|
r = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
|
|
if (r) {
|
|
return r;
|
|
}
|
|
|
|
attr.attr = KVM_S390_VM_TOD_HIGH;
|
|
attr.addr = (uint64_t)tod_high;
|
|
return kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
|
|
}
|
|
|
|
int kvm_s390_get_clock_ext(uint8_t *tod_high, uint64_t *tod_low)
|
|
{
|
|
int r;
|
|
struct kvm_s390_vm_tod_clock gtod;
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_TOD,
|
|
.attr = KVM_S390_VM_TOD_EXT,
|
|
.addr = (uint64_t)>od,
|
|
};
|
|
|
|
r = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
|
|
*tod_high = gtod.epoch_idx;
|
|
*tod_low = gtod.tod;
|
|
|
|
return r;
|
|
}
|
|
|
|
int kvm_s390_set_clock(uint8_t tod_high, uint64_t tod_low)
|
|
{
|
|
int r;
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_TOD,
|
|
.attr = KVM_S390_VM_TOD_LOW,
|
|
.addr = (uint64_t)&tod_low,
|
|
};
|
|
|
|
r = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
|
|
if (r) {
|
|
return r;
|
|
}
|
|
|
|
attr.attr = KVM_S390_VM_TOD_HIGH;
|
|
attr.addr = (uint64_t)&tod_high;
|
|
return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
|
|
}
|
|
|
|
int kvm_s390_set_clock_ext(uint8_t tod_high, uint64_t tod_low)
|
|
{
|
|
struct kvm_s390_vm_tod_clock gtod = {
|
|
.epoch_idx = tod_high,
|
|
.tod = tod_low,
|
|
};
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_TOD,
|
|
.attr = KVM_S390_VM_TOD_EXT,
|
|
.addr = (uint64_t)>od,
|
|
};
|
|
|
|
return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
|
|
}
|
|
|
|
/**
|
|
* kvm_s390_mem_op:
|
|
* @addr: the logical start address in guest memory
|
|
* @ar: the access register number
|
|
* @hostbuf: buffer in host memory. NULL = do only checks w/o copying
|
|
* @len: length that should be transferred
|
|
* @is_write: true = write, false = read
|
|
* Returns: 0 on success, non-zero if an exception or error occurred
|
|
*
|
|
* Use KVM ioctl to read/write from/to guest memory. An access exception
|
|
* is injected into the vCPU in case of translation errors.
|
|
*/
|
|
int kvm_s390_mem_op(S390CPU *cpu, vaddr addr, uint8_t ar, void *hostbuf,
|
|
int len, bool is_write)
|
|
{
|
|
struct kvm_s390_mem_op mem_op = {
|
|
.gaddr = addr,
|
|
.flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION,
|
|
.size = len,
|
|
.op = is_write ? KVM_S390_MEMOP_LOGICAL_WRITE
|
|
: KVM_S390_MEMOP_LOGICAL_READ,
|
|
.buf = (uint64_t)hostbuf,
|
|
.ar = ar,
|
|
.key = (cpu->env.psw.mask & PSW_MASK_KEY) >> PSW_SHIFT_KEY,
|
|
};
|
|
int ret;
|
|
|
|
if (!cap_mem_op) {
|
|
return -ENOSYS;
|
|
}
|
|
if (!hostbuf) {
|
|
mem_op.flags |= KVM_S390_MEMOP_F_CHECK_ONLY;
|
|
}
|
|
if (mem_op_storage_key_support) {
|
|
mem_op.flags |= KVM_S390_MEMOP_F_SKEY_PROTECTION;
|
|
}
|
|
|
|
ret = kvm_vcpu_ioctl(CPU(cpu), KVM_S390_MEM_OP, &mem_op);
|
|
if (ret < 0) {
|
|
warn_report("KVM_S390_MEM_OP failed: %s", strerror(-ret));
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int kvm_s390_mem_op_pv(S390CPU *cpu, uint64_t offset, void *hostbuf,
|
|
int len, bool is_write)
|
|
{
|
|
struct kvm_s390_mem_op mem_op = {
|
|
.sida_offset = offset,
|
|
.size = len,
|
|
.op = is_write ? KVM_S390_MEMOP_SIDA_WRITE
|
|
: KVM_S390_MEMOP_SIDA_READ,
|
|
.buf = (uint64_t)hostbuf,
|
|
};
|
|
int ret;
|
|
|
|
if (!cap_mem_op || !cap_protected) {
|
|
return -ENOSYS;
|
|
}
|
|
|
|
ret = kvm_vcpu_ioctl(CPU(cpu), KVM_S390_MEM_OP, &mem_op);
|
|
if (ret < 0) {
|
|
error_report("KVM_S390_MEM_OP failed: %s", strerror(-ret));
|
|
abort();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static uint8_t const *sw_bp_inst;
|
|
static uint8_t sw_bp_ilen;
|
|
|
|
static void determine_sw_breakpoint_instr(void)
|
|
{
|
|
/* DIAG 501 is used for sw breakpoints with old kernels */
|
|
static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
|
|
/* Instruction 0x0000 is used for sw breakpoints with recent kernels */
|
|
static const uint8_t instr_0x0000[] = {0x00, 0x00};
|
|
|
|
if (sw_bp_inst) {
|
|
return;
|
|
}
|
|
if (kvm_vm_enable_cap(kvm_state, KVM_CAP_S390_USER_INSTR0, 0)) {
|
|
sw_bp_inst = diag_501;
|
|
sw_bp_ilen = sizeof(diag_501);
|
|
trace_kvm_sw_breakpoint(4);
|
|
} else {
|
|
sw_bp_inst = instr_0x0000;
|
|
sw_bp_ilen = sizeof(instr_0x0000);
|
|
trace_kvm_sw_breakpoint(2);
|
|
}
|
|
}
|
|
|
|
int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
|
|
{
|
|
determine_sw_breakpoint_instr();
|
|
|
|
if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
|
|
sw_bp_ilen, 0) ||
|
|
cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)sw_bp_inst, sw_bp_ilen, 1)) {
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
|
|
{
|
|
uint8_t t[MAX_ILEN];
|
|
|
|
if (cpu_memory_rw_debug(cs, bp->pc, t, sw_bp_ilen, 0)) {
|
|
return -EINVAL;
|
|
} else if (memcmp(t, sw_bp_inst, sw_bp_ilen)) {
|
|
return -EINVAL;
|
|
} else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
|
|
sw_bp_ilen, 1)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct kvm_hw_breakpoint *find_hw_breakpoint(target_ulong addr,
|
|
int len, int type)
|
|
{
|
|
int n;
|
|
|
|
for (n = 0; n < nb_hw_breakpoints; n++) {
|
|
if (hw_breakpoints[n].addr == addr && hw_breakpoints[n].type == type &&
|
|
(hw_breakpoints[n].len == len || len == -1)) {
|
|
return &hw_breakpoints[n];
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int insert_hw_breakpoint(target_ulong addr, int len, int type)
|
|
{
|
|
int size;
|
|
|
|
if (find_hw_breakpoint(addr, len, type)) {
|
|
return -EEXIST;
|
|
}
|
|
|
|
size = (nb_hw_breakpoints + 1) * sizeof(struct kvm_hw_breakpoint);
|
|
|
|
if (!hw_breakpoints) {
|
|
nb_hw_breakpoints = 0;
|
|
hw_breakpoints = (struct kvm_hw_breakpoint *)g_try_malloc(size);
|
|
} else {
|
|
hw_breakpoints =
|
|
(struct kvm_hw_breakpoint *)g_try_realloc(hw_breakpoints, size);
|
|
}
|
|
|
|
if (!hw_breakpoints) {
|
|
nb_hw_breakpoints = 0;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
hw_breakpoints[nb_hw_breakpoints].addr = addr;
|
|
hw_breakpoints[nb_hw_breakpoints].len = len;
|
|
hw_breakpoints[nb_hw_breakpoints].type = type;
|
|
|
|
nb_hw_breakpoints++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_insert_hw_breakpoint(vaddr addr, vaddr len, int type)
|
|
{
|
|
switch (type) {
|
|
case GDB_BREAKPOINT_HW:
|
|
type = KVM_HW_BP;
|
|
break;
|
|
case GDB_WATCHPOINT_WRITE:
|
|
if (len < 1) {
|
|
return -EINVAL;
|
|
}
|
|
type = KVM_HW_WP_WRITE;
|
|
break;
|
|
default:
|
|
return -ENOSYS;
|
|
}
|
|
return insert_hw_breakpoint(addr, len, type);
|
|
}
|
|
|
|
int kvm_arch_remove_hw_breakpoint(vaddr addr, vaddr len, int type)
|
|
{
|
|
int size;
|
|
struct kvm_hw_breakpoint *bp = find_hw_breakpoint(addr, len, type);
|
|
|
|
if (bp == NULL) {
|
|
return -ENOENT;
|
|
}
|
|
|
|
nb_hw_breakpoints--;
|
|
if (nb_hw_breakpoints > 0) {
|
|
/*
|
|
* In order to trim the array, move the last element to the position to
|
|
* be removed - if necessary.
|
|
*/
|
|
if (bp != &hw_breakpoints[nb_hw_breakpoints]) {
|
|
*bp = hw_breakpoints[nb_hw_breakpoints];
|
|
}
|
|
size = nb_hw_breakpoints * sizeof(struct kvm_hw_breakpoint);
|
|
hw_breakpoints =
|
|
g_realloc(hw_breakpoints, size);
|
|
} else {
|
|
g_free(hw_breakpoints);
|
|
hw_breakpoints = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_remove_all_hw_breakpoints(void)
|
|
{
|
|
nb_hw_breakpoints = 0;
|
|
g_free(hw_breakpoints);
|
|
hw_breakpoints = NULL;
|
|
}
|
|
|
|
void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg)
|
|
{
|
|
int i;
|
|
|
|
if (nb_hw_breakpoints > 0) {
|
|
dbg->arch.nr_hw_bp = nb_hw_breakpoints;
|
|
dbg->arch.hw_bp = hw_breakpoints;
|
|
|
|
for (i = 0; i < nb_hw_breakpoints; ++i) {
|
|
hw_breakpoints[i].phys_addr = s390_cpu_get_phys_addr_debug(cpu,
|
|
hw_breakpoints[i].addr);
|
|
}
|
|
dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP;
|
|
} else {
|
|
dbg->arch.nr_hw_bp = 0;
|
|
dbg->arch.hw_bp = NULL;
|
|
}
|
|
}
|
|
|
|
void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run)
|
|
{
|
|
}
|
|
|
|
MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run)
|
|
{
|
|
return MEMTXATTRS_UNSPECIFIED;
|
|
}
|
|
|
|
int kvm_arch_process_async_events(CPUState *cs)
|
|
{
|
|
return cs->halted;
|
|
}
|
|
|
|
static int s390_kvm_irq_to_interrupt(struct kvm_s390_irq *irq,
|
|
struct kvm_s390_interrupt *interrupt)
|
|
{
|
|
int r = 0;
|
|
|
|
interrupt->type = irq->type;
|
|
switch (irq->type) {
|
|
case KVM_S390_INT_VIRTIO:
|
|
interrupt->parm = irq->u.ext.ext_params;
|
|
/* fall through */
|
|
case KVM_S390_INT_PFAULT_INIT:
|
|
case KVM_S390_INT_PFAULT_DONE:
|
|
interrupt->parm64 = irq->u.ext.ext_params2;
|
|
break;
|
|
case KVM_S390_PROGRAM_INT:
|
|
interrupt->parm = irq->u.pgm.code;
|
|
break;
|
|
case KVM_S390_SIGP_SET_PREFIX:
|
|
interrupt->parm = irq->u.prefix.address;
|
|
break;
|
|
case KVM_S390_INT_SERVICE:
|
|
interrupt->parm = irq->u.ext.ext_params;
|
|
break;
|
|
case KVM_S390_MCHK:
|
|
interrupt->parm = irq->u.mchk.cr14;
|
|
interrupt->parm64 = irq->u.mchk.mcic;
|
|
break;
|
|
case KVM_S390_INT_EXTERNAL_CALL:
|
|
interrupt->parm = irq->u.extcall.code;
|
|
break;
|
|
case KVM_S390_INT_EMERGENCY:
|
|
interrupt->parm = irq->u.emerg.code;
|
|
break;
|
|
case KVM_S390_SIGP_STOP:
|
|
case KVM_S390_RESTART:
|
|
break; /* These types have no parameters */
|
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
|
|
interrupt->parm = irq->u.io.subchannel_id << 16;
|
|
interrupt->parm |= irq->u.io.subchannel_nr;
|
|
interrupt->parm64 = (uint64_t)irq->u.io.io_int_parm << 32;
|
|
interrupt->parm64 |= irq->u.io.io_int_word;
|
|
break;
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static void inject_vcpu_irq_legacy(CPUState *cs, struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_interrupt kvmint = {};
|
|
int r;
|
|
|
|
r = s390_kvm_irq_to_interrupt(irq, &kvmint);
|
|
if (r < 0) {
|
|
fprintf(stderr, "%s called with bogus interrupt\n", __func__);
|
|
exit(1);
|
|
}
|
|
|
|
r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint);
|
|
if (r < 0) {
|
|
fprintf(stderr, "KVM failed to inject interrupt\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
int r;
|
|
|
|
if (cap_s390_irq) {
|
|
r = kvm_vcpu_ioctl(cs, KVM_S390_IRQ, irq);
|
|
if (!r) {
|
|
return;
|
|
}
|
|
error_report("KVM failed to inject interrupt %llx", irq->type);
|
|
exit(1);
|
|
}
|
|
|
|
inject_vcpu_irq_legacy(cs, irq);
|
|
}
|
|
|
|
void kvm_s390_floating_interrupt_legacy(struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_interrupt kvmint = {};
|
|
int r;
|
|
|
|
r = s390_kvm_irq_to_interrupt(irq, &kvmint);
|
|
if (r < 0) {
|
|
fprintf(stderr, "%s called with bogus interrupt\n", __func__);
|
|
exit(1);
|
|
}
|
|
|
|
r = kvm_vm_ioctl(kvm_state, KVM_S390_INTERRUPT, &kvmint);
|
|
if (r < 0) {
|
|
fprintf(stderr, "KVM failed to inject interrupt\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
void kvm_s390_program_interrupt(S390CPU *cpu, uint16_t code)
|
|
{
|
|
struct kvm_s390_irq irq = {
|
|
.type = KVM_S390_PROGRAM_INT,
|
|
.u.pgm.code = code,
|
|
};
|
|
qemu_log_mask(CPU_LOG_INT, "program interrupt at %#" PRIx64 "\n",
|
|
cpu->env.psw.addr);
|
|
kvm_s390_vcpu_interrupt(cpu, &irq);
|
|
}
|
|
|
|
void kvm_s390_access_exception(S390CPU *cpu, uint16_t code, uint64_t te_code)
|
|
{
|
|
struct kvm_s390_irq irq = {
|
|
.type = KVM_S390_PROGRAM_INT,
|
|
.u.pgm.code = code,
|
|
.u.pgm.trans_exc_code = te_code,
|
|
.u.pgm.exc_access_id = te_code & 3,
|
|
};
|
|
|
|
kvm_s390_vcpu_interrupt(cpu, &irq);
|
|
}
|
|
|
|
static void kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
|
|
uint16_t ipbh0)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
uint64_t sccb;
|
|
uint32_t code;
|
|
int r;
|
|
|
|
sccb = env->regs[ipbh0 & 0xf];
|
|
code = env->regs[(ipbh0 & 0xf0) >> 4];
|
|
|
|
switch (run->s390_sieic.icptcode) {
|
|
case ICPT_PV_INSTR_NOTIFICATION:
|
|
g_assert(s390_is_pv());
|
|
/* The notification intercepts are currently handled by KVM */
|
|
error_report("unexpected SCLP PV notification");
|
|
exit(1);
|
|
break;
|
|
case ICPT_PV_INSTR:
|
|
g_assert(s390_is_pv());
|
|
sclp_service_call_protected(cpu, sccb, code);
|
|
/* Setting the CC is done by the Ultravisor. */
|
|
break;
|
|
case ICPT_INSTRUCTION:
|
|
g_assert(!s390_is_pv());
|
|
r = sclp_service_call(cpu, sccb, code);
|
|
if (r < 0) {
|
|
kvm_s390_program_interrupt(cpu, -r);
|
|
return;
|
|
}
|
|
setcc(cpu, r);
|
|
}
|
|
}
|
|
|
|
static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
int rc = 0;
|
|
uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
|
|
|
|
switch (ipa1) {
|
|
case PRIV_B2_XSCH:
|
|
ioinst_handle_xsch(cpu, env->regs[1], RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_CSCH:
|
|
ioinst_handle_csch(cpu, env->regs[1], RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_HSCH:
|
|
ioinst_handle_hsch(cpu, env->regs[1], RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_MSCH:
|
|
ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb, RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_SSCH:
|
|
ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb, RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_STCRW:
|
|
ioinst_handle_stcrw(cpu, run->s390_sieic.ipb, RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_STSCH:
|
|
ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb, RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_TSCH:
|
|
/* We should only get tsch via KVM_EXIT_S390_TSCH. */
|
|
fprintf(stderr, "Spurious tsch intercept\n");
|
|
break;
|
|
case PRIV_B2_CHSC:
|
|
ioinst_handle_chsc(cpu, run->s390_sieic.ipb, RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_TPI:
|
|
/* This should have been handled by kvm already. */
|
|
fprintf(stderr, "Spurious tpi intercept\n");
|
|
break;
|
|
case PRIV_B2_SCHM:
|
|
ioinst_handle_schm(cpu, env->regs[1], env->regs[2],
|
|
run->s390_sieic.ipb, RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_RSCH:
|
|
ioinst_handle_rsch(cpu, env->regs[1], RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_RCHP:
|
|
ioinst_handle_rchp(cpu, env->regs[1], RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_STCPS:
|
|
/* We do not provide this instruction, it is suppressed. */
|
|
break;
|
|
case PRIV_B2_SAL:
|
|
ioinst_handle_sal(cpu, env->regs[1], RA_IGNORED);
|
|
break;
|
|
case PRIV_B2_SIGA:
|
|
/* Not provided, set CC = 3 for subchannel not operational */
|
|
setcc(cpu, 3);
|
|
break;
|
|
case PRIV_B2_SCLP_CALL:
|
|
kvm_sclp_service_call(cpu, run, ipbh0);
|
|
break;
|
|
default:
|
|
rc = -1;
|
|
trace_kvm_insn_unhandled_priv(ipa1);
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static uint64_t get_base_disp_rxy(S390CPU *cpu, struct kvm_run *run,
|
|
uint8_t *ar)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
uint32_t x2 = (run->s390_sieic.ipa & 0x000f);
|
|
uint32_t base2 = run->s390_sieic.ipb >> 28;
|
|
uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) +
|
|
((run->s390_sieic.ipb & 0xff00) << 4);
|
|
|
|
if (disp2 & 0x80000) {
|
|
disp2 += 0xfff00000;
|
|
}
|
|
if (ar) {
|
|
*ar = base2;
|
|
}
|
|
|
|
return (base2 ? env->regs[base2] : 0) +
|
|
(x2 ? env->regs[x2] : 0) + (long)(int)disp2;
|
|
}
|
|
|
|
static uint64_t get_base_disp_rsy(S390CPU *cpu, struct kvm_run *run,
|
|
uint8_t *ar)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
uint32_t base2 = run->s390_sieic.ipb >> 28;
|
|
uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) +
|
|
((run->s390_sieic.ipb & 0xff00) << 4);
|
|
|
|
if (disp2 & 0x80000) {
|
|
disp2 += 0xfff00000;
|
|
}
|
|
if (ar) {
|
|
*ar = base2;
|
|
}
|
|
|
|
return (base2 ? env->regs[base2] : 0) + (long)(int)disp2;
|
|
}
|
|
|
|
static int kvm_clp_service_call(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
|
|
|
|
if (s390_has_feat(S390_FEAT_ZPCI)) {
|
|
return clp_service_call(cpu, r2, RA_IGNORED);
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int kvm_pcilg_service_call(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
|
|
uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
|
|
|
|
if (s390_has_feat(S390_FEAT_ZPCI)) {
|
|
return pcilg_service_call(cpu, r1, r2, RA_IGNORED);
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int kvm_pcistg_service_call(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
|
|
uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
|
|
|
|
if (s390_has_feat(S390_FEAT_ZPCI)) {
|
|
return pcistg_service_call(cpu, r1, r2, RA_IGNORED);
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int kvm_stpcifc_service_call(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
|
|
uint64_t fiba;
|
|
uint8_t ar;
|
|
|
|
if (s390_has_feat(S390_FEAT_ZPCI)) {
|
|
fiba = get_base_disp_rxy(cpu, run, &ar);
|
|
|
|
return stpcifc_service_call(cpu, r1, fiba, ar, RA_IGNORED);
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int kvm_sic_service_call(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
|
|
uint8_t r3 = run->s390_sieic.ipa & 0x000f;
|
|
uint8_t isc;
|
|
uint16_t mode;
|
|
int r;
|
|
|
|
mode = env->regs[r1] & 0xffff;
|
|
isc = (env->regs[r3] >> 27) & 0x7;
|
|
r = css_do_sic(cpu, isc, mode);
|
|
if (r) {
|
|
kvm_s390_program_interrupt(cpu, -r);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_rpcit_service_call(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
|
|
uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
|
|
|
|
if (s390_has_feat(S390_FEAT_ZPCI)) {
|
|
return rpcit_service_call(cpu, r1, r2, RA_IGNORED);
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int kvm_pcistb_service_call(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
|
|
uint8_t r3 = run->s390_sieic.ipa & 0x000f;
|
|
uint64_t gaddr;
|
|
uint8_t ar;
|
|
|
|
if (s390_has_feat(S390_FEAT_ZPCI)) {
|
|
gaddr = get_base_disp_rsy(cpu, run, &ar);
|
|
|
|
return pcistb_service_call(cpu, r1, r3, gaddr, ar, RA_IGNORED);
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int kvm_mpcifc_service_call(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
|
|
uint64_t fiba;
|
|
uint8_t ar;
|
|
|
|
if (s390_has_feat(S390_FEAT_ZPCI)) {
|
|
fiba = get_base_disp_rxy(cpu, run, &ar);
|
|
|
|
return mpcifc_service_call(cpu, r1, fiba, ar, RA_IGNORED);
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static void kvm_handle_ptf(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint8_t r1 = (run->s390_sieic.ipb >> 20) & 0x0f;
|
|
|
|
s390_handle_ptf(cpu, r1, RA_IGNORED);
|
|
}
|
|
|
|
static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
|
|
{
|
|
int r = 0;
|
|
|
|
switch (ipa1) {
|
|
case PRIV_B9_CLP:
|
|
r = kvm_clp_service_call(cpu, run);
|
|
break;
|
|
case PRIV_B9_PCISTG:
|
|
r = kvm_pcistg_service_call(cpu, run);
|
|
break;
|
|
case PRIV_B9_PCILG:
|
|
r = kvm_pcilg_service_call(cpu, run);
|
|
break;
|
|
case PRIV_B9_RPCIT:
|
|
r = kvm_rpcit_service_call(cpu, run);
|
|
break;
|
|
case PRIV_B9_PTF:
|
|
kvm_handle_ptf(cpu, run);
|
|
break;
|
|
case PRIV_B9_EQBS:
|
|
/* just inject exception */
|
|
r = -1;
|
|
break;
|
|
default:
|
|
r = -1;
|
|
trace_kvm_insn_unhandled_priv(ipa1);
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl)
|
|
{
|
|
int r = 0;
|
|
|
|
switch (ipbl) {
|
|
case PRIV_EB_PCISTB:
|
|
r = kvm_pcistb_service_call(cpu, run);
|
|
break;
|
|
case PRIV_EB_SIC:
|
|
r = kvm_sic_service_call(cpu, run);
|
|
break;
|
|
case PRIV_EB_SQBS:
|
|
/* just inject exception */
|
|
r = -1;
|
|
break;
|
|
default:
|
|
r = -1;
|
|
trace_kvm_insn_unhandled_priv(ipbl);
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int handle_e3(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl)
|
|
{
|
|
int r = 0;
|
|
|
|
switch (ipbl) {
|
|
case PRIV_E3_MPCIFC:
|
|
r = kvm_mpcifc_service_call(cpu, run);
|
|
break;
|
|
case PRIV_E3_STPCIFC:
|
|
r = kvm_stpcifc_service_call(cpu, run);
|
|
break;
|
|
default:
|
|
r = -1;
|
|
trace_kvm_insn_unhandled_priv(ipbl);
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int handle_hypercall(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
int ret;
|
|
|
|
ret = s390_virtio_hypercall(env);
|
|
if (ret == -EINVAL) {
|
|
kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION);
|
|
return 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void kvm_handle_diag_288(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint64_t r1, r3;
|
|
int rc;
|
|
|
|
r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
|
|
r3 = run->s390_sieic.ipa & 0x000f;
|
|
rc = handle_diag_288(&cpu->env, r1, r3);
|
|
if (rc) {
|
|
kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION);
|
|
}
|
|
}
|
|
|
|
static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint64_t r1, r3;
|
|
|
|
r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
|
|
r3 = run->s390_sieic.ipa & 0x000f;
|
|
handle_diag_308(&cpu->env, r1, r3, RA_IGNORED);
|
|
}
|
|
|
|
static int handle_sw_breakpoint(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
unsigned long pc;
|
|
|
|
pc = env->psw.addr - sw_bp_ilen;
|
|
if (kvm_find_sw_breakpoint(CPU(cpu), pc)) {
|
|
env->psw.addr = pc;
|
|
return EXCP_DEBUG;
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
void kvm_s390_set_diag318(CPUState *cs, uint64_t diag318_info)
|
|
{
|
|
CPUS390XState *env = &S390_CPU(cs)->env;
|
|
|
|
/* Feat bit is set only if KVM supports sync for diag318 */
|
|
if (s390_has_feat(S390_FEAT_DIAG_318)) {
|
|
env->diag318_info = diag318_info;
|
|
cs->kvm_run->s.regs.diag318 = diag318_info;
|
|
cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_DIAG318;
|
|
/*
|
|
* diag 318 info is zeroed during a clear reset and
|
|
* diag 308 IPL subcodes.
|
|
*/
|
|
}
|
|
}
|
|
|
|
static void handle_diag_318(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint64_t reg = (run->s390_sieic.ipa & 0x00f0) >> 4;
|
|
uint64_t diag318_info = run->s.regs.gprs[reg];
|
|
CPUState *t;
|
|
|
|
/*
|
|
* DIAG 318 can only be enabled with KVM support. As such, let's
|
|
* ensure a guest cannot execute this instruction erroneously.
|
|
*/
|
|
if (!s390_has_feat(S390_FEAT_DIAG_318)) {
|
|
kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION);
|
|
return;
|
|
}
|
|
|
|
CPU_FOREACH(t) {
|
|
run_on_cpu(t, s390_do_cpu_set_diag318,
|
|
RUN_ON_CPU_HOST_ULONG(diag318_info));
|
|
}
|
|
}
|
|
|
|
#define DIAG_KVM_CODE_MASK 0x000000000000ffff
|
|
|
|
static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb)
|
|
{
|
|
int r = 0;
|
|
uint16_t func_code;
|
|
|
|
/*
|
|
* For any diagnose call we support, bits 48-63 of the resulting
|
|
* address specify the function code; the remainder is ignored.
|
|
*/
|
|
func_code = decode_basedisp_rs(&cpu->env, ipb, NULL) & DIAG_KVM_CODE_MASK;
|
|
switch (func_code) {
|
|
case DIAG_TIMEREVENT:
|
|
kvm_handle_diag_288(cpu, run);
|
|
break;
|
|
case DIAG_IPL:
|
|
kvm_handle_diag_308(cpu, run);
|
|
break;
|
|
case DIAG_SET_CONTROL_PROGRAM_CODES:
|
|
handle_diag_318(cpu, run);
|
|
break;
|
|
case DIAG_KVM_HYPERCALL:
|
|
r = handle_hypercall(cpu, run);
|
|
break;
|
|
case DIAG_KVM_BREAKPOINT:
|
|
r = handle_sw_breakpoint(cpu, run);
|
|
break;
|
|
default:
|
|
trace_kvm_insn_diag(func_code);
|
|
kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION);
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int kvm_s390_handle_sigp(S390CPU *cpu, uint8_t ipa1, uint32_t ipb)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
const uint8_t r1 = ipa1 >> 4;
|
|
const uint8_t r3 = ipa1 & 0x0f;
|
|
int ret;
|
|
uint8_t order;
|
|
|
|
/* get order code */
|
|
order = decode_basedisp_rs(env, ipb, NULL) & SIGP_ORDER_MASK;
|
|
|
|
ret = handle_sigp(env, order, r1, r3);
|
|
setcc(cpu, ret);
|
|
return 0;
|
|
}
|
|
|
|
static int handle_instruction(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
|
|
uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
|
|
int r = -1;
|
|
|
|
trace_kvm_insn(run->s390_sieic.ipa, run->s390_sieic.ipb);
|
|
switch (ipa0) {
|
|
case IPA0_B2:
|
|
r = handle_b2(cpu, run, ipa1);
|
|
break;
|
|
case IPA0_B9:
|
|
r = handle_b9(cpu, run, ipa1);
|
|
break;
|
|
case IPA0_EB:
|
|
r = handle_eb(cpu, run, run->s390_sieic.ipb & 0xff);
|
|
break;
|
|
case IPA0_E3:
|
|
r = handle_e3(cpu, run, run->s390_sieic.ipb & 0xff);
|
|
break;
|
|
case IPA0_DIAG:
|
|
r = handle_diag(cpu, run, run->s390_sieic.ipb);
|
|
break;
|
|
case IPA0_SIGP:
|
|
r = kvm_s390_handle_sigp(cpu, ipa1, run->s390_sieic.ipb);
|
|
break;
|
|
}
|
|
|
|
if (r < 0) {
|
|
r = 0;
|
|
kvm_s390_program_interrupt(cpu, PGM_OPERATION);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static void unmanageable_intercept(S390CPU *cpu, S390CrashReason reason,
|
|
int pswoffset)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
|
|
s390_cpu_halt(cpu);
|
|
cpu->env.crash_reason = reason;
|
|
qemu_system_guest_panicked(cpu_get_crash_info(cs));
|
|
}
|
|
|
|
/* try to detect pgm check loops */
|
|
static int handle_oper_loop(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
PSW oldpsw, newpsw;
|
|
|
|
newpsw.mask = ldq_phys(cs->as, cpu->env.psa +
|
|
offsetof(LowCore, program_new_psw));
|
|
newpsw.addr = ldq_phys(cs->as, cpu->env.psa +
|
|
offsetof(LowCore, program_new_psw) + 8);
|
|
oldpsw.mask = run->psw_mask;
|
|
oldpsw.addr = run->psw_addr;
|
|
/*
|
|
* Avoid endless loops of operation exceptions, if the pgm new
|
|
* PSW will cause a new operation exception.
|
|
* The heuristic checks if the pgm new psw is within 6 bytes before
|
|
* the faulting psw address (with same DAT, AS settings) and the
|
|
* new psw is not a wait psw and the fault was not triggered by
|
|
* problem state. In that case go into crashed state.
|
|
*/
|
|
|
|
if (oldpsw.addr - newpsw.addr <= 6 &&
|
|
!(newpsw.mask & PSW_MASK_WAIT) &&
|
|
!(oldpsw.mask & PSW_MASK_PSTATE) &&
|
|
(newpsw.mask & PSW_MASK_ASC) == (oldpsw.mask & PSW_MASK_ASC) &&
|
|
(newpsw.mask & PSW_MASK_DAT) == (oldpsw.mask & PSW_MASK_DAT)) {
|
|
unmanageable_intercept(cpu, S390_CRASH_REASON_OPINT_LOOP,
|
|
offsetof(LowCore, program_new_psw));
|
|
return EXCP_HALTED;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int handle_intercept(S390CPU *cpu)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
struct kvm_run *run = cs->kvm_run;
|
|
int icpt_code = run->s390_sieic.icptcode;
|
|
int r = 0;
|
|
|
|
trace_kvm_intercept(icpt_code, (long)run->psw_addr);
|
|
switch (icpt_code) {
|
|
case ICPT_INSTRUCTION:
|
|
case ICPT_PV_INSTR:
|
|
case ICPT_PV_INSTR_NOTIFICATION:
|
|
r = handle_instruction(cpu, run);
|
|
break;
|
|
case ICPT_PROGRAM:
|
|
unmanageable_intercept(cpu, S390_CRASH_REASON_PGMINT_LOOP,
|
|
offsetof(LowCore, program_new_psw));
|
|
r = EXCP_HALTED;
|
|
break;
|
|
case ICPT_EXT_INT:
|
|
unmanageable_intercept(cpu, S390_CRASH_REASON_EXTINT_LOOP,
|
|
offsetof(LowCore, external_new_psw));
|
|
r = EXCP_HALTED;
|
|
break;
|
|
case ICPT_WAITPSW:
|
|
/* disabled wait, since enabled wait is handled in kernel */
|
|
s390_handle_wait(cpu);
|
|
r = EXCP_HALTED;
|
|
break;
|
|
case ICPT_CPU_STOP:
|
|
do_stop_interrupt(&cpu->env);
|
|
r = EXCP_HALTED;
|
|
break;
|
|
case ICPT_OPEREXC:
|
|
/* check for break points */
|
|
r = handle_sw_breakpoint(cpu, run);
|
|
if (r == -ENOENT) {
|
|
/* Then check for potential pgm check loops */
|
|
r = handle_oper_loop(cpu, run);
|
|
if (r == 0) {
|
|
kvm_s390_program_interrupt(cpu, PGM_OPERATION);
|
|
}
|
|
}
|
|
break;
|
|
case ICPT_SOFT_INTERCEPT:
|
|
fprintf(stderr, "KVM unimplemented icpt SOFT\n");
|
|
exit(1);
|
|
break;
|
|
case ICPT_IO:
|
|
fprintf(stderr, "KVM unimplemented icpt IO\n");
|
|
exit(1);
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
|
|
exit(1);
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int handle_tsch(S390CPU *cpu)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
struct kvm_run *run = cs->kvm_run;
|
|
int ret;
|
|
|
|
ret = ioinst_handle_tsch(cpu, cpu->env.regs[1], run->s390_tsch.ipb,
|
|
RA_IGNORED);
|
|
if (ret < 0) {
|
|
/*
|
|
* Failure.
|
|
* If an I/O interrupt had been dequeued, we have to reinject it.
|
|
*/
|
|
if (run->s390_tsch.dequeued) {
|
|
s390_io_interrupt(run->s390_tsch.subchannel_id,
|
|
run->s390_tsch.subchannel_nr,
|
|
run->s390_tsch.io_int_parm,
|
|
run->s390_tsch.io_int_word);
|
|
}
|
|
ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void insert_stsi_3_2_2(S390CPU *cpu, __u64 addr, uint8_t ar)
|
|
{
|
|
const MachineState *ms = MACHINE(qdev_get_machine());
|
|
uint16_t conf_cpus = 0, reserved_cpus = 0;
|
|
SysIB_322 sysib;
|
|
int del, i;
|
|
|
|
if (s390_is_pv()) {
|
|
s390_cpu_pv_mem_read(cpu, 0, &sysib, sizeof(sysib));
|
|
} else if (s390_cpu_virt_mem_read(cpu, addr, ar, &sysib, sizeof(sysib))) {
|
|
return;
|
|
}
|
|
/* Shift the stack of Extended Names to prepare for our own data */
|
|
memmove(&sysib.ext_names[1], &sysib.ext_names[0],
|
|
sizeof(sysib.ext_names[0]) * (sysib.count - 1));
|
|
/* First virt level, that doesn't provide Ext Names delimits stack. It is
|
|
* assumed it's not capable of managing Extended Names for lower levels.
|
|
*/
|
|
for (del = 1; del < sysib.count; del++) {
|
|
if (!sysib.vm[del].ext_name_encoding || !sysib.ext_names[del][0]) {
|
|
break;
|
|
}
|
|
}
|
|
if (del < sysib.count) {
|
|
memset(sysib.ext_names[del], 0,
|
|
sizeof(sysib.ext_names[0]) * (sysib.count - del));
|
|
}
|
|
|
|
/* count the cpus and split them into configured and reserved ones */
|
|
for (i = 0; i < ms->possible_cpus->len; i++) {
|
|
if (ms->possible_cpus->cpus[i].cpu) {
|
|
conf_cpus++;
|
|
} else {
|
|
reserved_cpus++;
|
|
}
|
|
}
|
|
sysib.vm[0].total_cpus = conf_cpus + reserved_cpus;
|
|
sysib.vm[0].conf_cpus = conf_cpus;
|
|
sysib.vm[0].reserved_cpus = reserved_cpus;
|
|
|
|
/* Insert short machine name in EBCDIC, padded with blanks */
|
|
if (qemu_name) {
|
|
memset(sysib.vm[0].name, 0x40, sizeof(sysib.vm[0].name));
|
|
ebcdic_put(sysib.vm[0].name, qemu_name, MIN(sizeof(sysib.vm[0].name),
|
|
strlen(qemu_name)));
|
|
}
|
|
sysib.vm[0].ext_name_encoding = 2; /* 2 = UTF-8 */
|
|
/* If hypervisor specifies zero Extended Name in STSI322 SYSIB, it's
|
|
* considered by s390 as not capable of providing any Extended Name.
|
|
* Therefore if no name was specified on qemu invocation, we go with the
|
|
* same "KVMguest" default, which KVM has filled into short name field.
|
|
*/
|
|
strpadcpy((char *)sysib.ext_names[0],
|
|
sizeof(sysib.ext_names[0]),
|
|
qemu_name ?: "KVMguest", '\0');
|
|
|
|
/* Insert UUID */
|
|
memcpy(sysib.vm[0].uuid, &qemu_uuid, sizeof(sysib.vm[0].uuid));
|
|
|
|
if (s390_is_pv()) {
|
|
s390_cpu_pv_mem_write(cpu, 0, &sysib, sizeof(sysib));
|
|
} else {
|
|
s390_cpu_virt_mem_write(cpu, addr, ar, &sysib, sizeof(sysib));
|
|
}
|
|
}
|
|
|
|
static int handle_stsi(S390CPU *cpu)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
struct kvm_run *run = cs->kvm_run;
|
|
|
|
switch (run->s390_stsi.fc) {
|
|
case 3:
|
|
if (run->s390_stsi.sel1 != 2 || run->s390_stsi.sel2 != 2) {
|
|
return 0;
|
|
}
|
|
insert_stsi_3_2_2(cpu, run->s390_stsi.addr, run->s390_stsi.ar);
|
|
return 0;
|
|
case 15:
|
|
insert_stsi_15_1_x(cpu, run->s390_stsi.sel2, run->s390_stsi.addr,
|
|
run->s390_stsi.ar, RA_IGNORED);
|
|
return 0;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int kvm_arch_handle_debug_exit(S390CPU *cpu)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
struct kvm_run *run = cs->kvm_run;
|
|
|
|
int ret = 0;
|
|
struct kvm_debug_exit_arch *arch_info = &run->debug.arch;
|
|
|
|
switch (arch_info->type) {
|
|
case KVM_HW_WP_WRITE:
|
|
if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) {
|
|
cs->watchpoint_hit = &hw_watchpoint;
|
|
hw_watchpoint.vaddr = arch_info->addr;
|
|
hw_watchpoint.flags = BP_MEM_WRITE;
|
|
ret = EXCP_DEBUG;
|
|
}
|
|
break;
|
|
case KVM_HW_BP:
|
|
if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) {
|
|
ret = EXCP_DEBUG;
|
|
}
|
|
break;
|
|
case KVM_SINGLESTEP:
|
|
if (cs->singlestep_enabled) {
|
|
ret = EXCP_DEBUG;
|
|
}
|
|
break;
|
|
default:
|
|
ret = -ENOSYS;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
|
|
{
|
|
S390CPU *cpu = S390_CPU(cs);
|
|
int ret = 0;
|
|
|
|
bql_lock();
|
|
|
|
kvm_cpu_synchronize_state(cs);
|
|
|
|
switch (run->exit_reason) {
|
|
case KVM_EXIT_S390_SIEIC:
|
|
ret = handle_intercept(cpu);
|
|
break;
|
|
case KVM_EXIT_S390_RESET:
|
|
s390_ipl_reset_request(cs, S390_RESET_REIPL);
|
|
break;
|
|
case KVM_EXIT_S390_TSCH:
|
|
ret = handle_tsch(cpu);
|
|
break;
|
|
case KVM_EXIT_S390_STSI:
|
|
ret = handle_stsi(cpu);
|
|
break;
|
|
case KVM_EXIT_DEBUG:
|
|
ret = kvm_arch_handle_debug_exit(cpu);
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
|
|
break;
|
|
}
|
|
bql_unlock();
|
|
|
|
if (ret == 0) {
|
|
ret = EXCP_INTERRUPT;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
void kvm_s390_enable_css_support(S390CPU *cpu)
|
|
{
|
|
int r;
|
|
|
|
/* Activate host kernel channel subsystem support. */
|
|
r = kvm_vcpu_enable_cap(CPU(cpu), KVM_CAP_S390_CSS_SUPPORT, 0);
|
|
assert(r == 0);
|
|
}
|
|
|
|
void kvm_arch_init_irq_routing(KVMState *s)
|
|
{
|
|
/*
|
|
* Note that while irqchip capabilities generally imply that cpustates
|
|
* are handled in-kernel, it is not true for s390 (yet); therefore, we
|
|
* have to override the common code kvm_halt_in_kernel_allowed setting.
|
|
*/
|
|
if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) {
|
|
kvm_gsi_routing_allowed = true;
|
|
kvm_halt_in_kernel_allowed = false;
|
|
}
|
|
}
|
|
|
|
int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
|
|
int vq, bool assign)
|
|
{
|
|
struct kvm_ioeventfd kick = {
|
|
.flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY |
|
|
KVM_IOEVENTFD_FLAG_DATAMATCH,
|
|
.fd = event_notifier_get_fd(notifier),
|
|
.datamatch = vq,
|
|
.addr = sch,
|
|
.len = 8,
|
|
};
|
|
trace_kvm_assign_subch_ioeventfd(kick.fd, kick.addr, assign,
|
|
kick.datamatch);
|
|
if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) {
|
|
return -ENOSYS;
|
|
}
|
|
if (!assign) {
|
|
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
|
|
}
|
|
return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
|
|
}
|
|
|
|
int kvm_s390_get_protected_dump(void)
|
|
{
|
|
return cap_protected_dump;
|
|
}
|
|
|
|
int kvm_s390_get_ri(void)
|
|
{
|
|
return cap_ri;
|
|
}
|
|
|
|
int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state)
|
|
{
|
|
struct kvm_mp_state mp_state = {};
|
|
int ret;
|
|
|
|
/* the kvm part might not have been initialized yet */
|
|
if (CPU(cpu)->kvm_state == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
switch (cpu_state) {
|
|
case S390_CPU_STATE_STOPPED:
|
|
mp_state.mp_state = KVM_MP_STATE_STOPPED;
|
|
break;
|
|
case S390_CPU_STATE_CHECK_STOP:
|
|
mp_state.mp_state = KVM_MP_STATE_CHECK_STOP;
|
|
break;
|
|
case S390_CPU_STATE_OPERATING:
|
|
mp_state.mp_state = KVM_MP_STATE_OPERATING;
|
|
break;
|
|
case S390_CPU_STATE_LOAD:
|
|
mp_state.mp_state = KVM_MP_STATE_LOAD;
|
|
break;
|
|
default:
|
|
error_report("Requested CPU state is not a valid S390 CPU state: %u",
|
|
cpu_state);
|
|
exit(1);
|
|
}
|
|
|
|
ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state);
|
|
if (ret) {
|
|
trace_kvm_failed_cpu_state_set(CPU(cpu)->cpu_index, cpu_state,
|
|
strerror(-ret));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void kvm_s390_vcpu_interrupt_pre_save(S390CPU *cpu)
|
|
{
|
|
unsigned int max_cpus = MACHINE(qdev_get_machine())->smp.max_cpus;
|
|
struct kvm_s390_irq_state irq_state = {
|
|
.buf = (uint64_t) cpu->irqstate,
|
|
.len = VCPU_IRQ_BUF_SIZE(max_cpus),
|
|
};
|
|
CPUState *cs = CPU(cpu);
|
|
int32_t bytes;
|
|
|
|
if (!kvm_check_extension(kvm_state, KVM_CAP_S390_IRQ_STATE)) {
|
|
return;
|
|
}
|
|
|
|
bytes = kvm_vcpu_ioctl(cs, KVM_S390_GET_IRQ_STATE, &irq_state);
|
|
if (bytes < 0) {
|
|
cpu->irqstate_saved_size = 0;
|
|
error_report("Migration of interrupt state failed");
|
|
return;
|
|
}
|
|
|
|
cpu->irqstate_saved_size = bytes;
|
|
}
|
|
|
|
int kvm_s390_vcpu_interrupt_post_load(S390CPU *cpu)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
struct kvm_s390_irq_state irq_state = {
|
|
.buf = (uint64_t) cpu->irqstate,
|
|
.len = cpu->irqstate_saved_size,
|
|
};
|
|
int r;
|
|
|
|
if (cpu->irqstate_saved_size == 0) {
|
|
return 0;
|
|
}
|
|
|
|
if (!kvm_check_extension(kvm_state, KVM_CAP_S390_IRQ_STATE)) {
|
|
return -ENOSYS;
|
|
}
|
|
|
|
r = kvm_vcpu_ioctl(cs, KVM_S390_SET_IRQ_STATE, &irq_state);
|
|
if (r) {
|
|
error_report("Setting interrupt state failed %d", r);
|
|
}
|
|
return r;
|
|
}
|
|
|
|
int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
|
|
uint64_t address, uint32_t data, PCIDevice *dev)
|
|
{
|
|
S390PCIBusDevice *pbdev;
|
|
uint32_t vec = data & ZPCI_MSI_VEC_MASK;
|
|
|
|
if (!dev) {
|
|
trace_kvm_msi_route_fixup("no pci device");
|
|
return -ENODEV;
|
|
}
|
|
|
|
pbdev = s390_pci_find_dev_by_target(s390_get_phb(), DEVICE(dev)->id);
|
|
if (!pbdev) {
|
|
trace_kvm_msi_route_fixup("no zpci device");
|
|
return -ENODEV;
|
|
}
|
|
|
|
route->type = KVM_IRQ_ROUTING_S390_ADAPTER;
|
|
route->flags = 0;
|
|
route->u.adapter.summary_addr = pbdev->routes.adapter.summary_addr;
|
|
route->u.adapter.ind_addr = pbdev->routes.adapter.ind_addr;
|
|
route->u.adapter.summary_offset = pbdev->routes.adapter.summary_offset;
|
|
route->u.adapter.ind_offset = pbdev->routes.adapter.ind_offset + vec;
|
|
route->u.adapter.adapter_id = pbdev->routes.adapter.adapter_id;
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
|
|
int vector, PCIDevice *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_release_virq_post(int virq)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_msi_data_to_gsi(uint32_t data)
|
|
{
|
|
abort();
|
|
}
|
|
|
|
static int query_cpu_subfunc(S390FeatBitmap features)
|
|
{
|
|
struct kvm_s390_vm_cpu_subfunc prop = {};
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_CPU_MODEL,
|
|
.attr = KVM_S390_VM_CPU_MACHINE_SUBFUNC,
|
|
.addr = (uint64_t) &prop,
|
|
};
|
|
int rc;
|
|
|
|
rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* We're going to add all subfunctions now, if the corresponding feature
|
|
* is available that unlocks the query functions.
|
|
*/
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_PLO, prop.plo);
|
|
if (test_bit(S390_FEAT_TOD_CLOCK_STEERING, features)) {
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_PTFF, prop.ptff);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA, features)) {
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_KMAC, prop.kmac);
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_KMC, prop.kmc);
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_KM, prop.km);
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_KIMD, prop.kimd);
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_KLMD, prop.klmd);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA_EXT_3, features)) {
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_PCKMO, prop.pckmo);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA_EXT_4, features)) {
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_KMCTR, prop.kmctr);
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_KMF, prop.kmf);
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_KMO, prop.kmo);
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_PCC, prop.pcc);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA_EXT_5, features)) {
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_PPNO, prop.ppno);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA_EXT_8, features)) {
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_KMA, prop.kma);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA_EXT_9, features)) {
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_KDSA, prop.kdsa);
|
|
}
|
|
if (test_bit(S390_FEAT_ESORT_BASE, features)) {
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_SORTL, prop.sortl);
|
|
}
|
|
if (test_bit(S390_FEAT_DEFLATE_BASE, features)) {
|
|
s390_add_from_feat_block(features, S390_FEAT_TYPE_DFLTCC, prop.dfltcc);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int configure_cpu_subfunc(const S390FeatBitmap features)
|
|
{
|
|
struct kvm_s390_vm_cpu_subfunc prop = {};
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_CPU_MODEL,
|
|
.attr = KVM_S390_VM_CPU_PROCESSOR_SUBFUNC,
|
|
.addr = (uint64_t) &prop,
|
|
};
|
|
|
|
if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
|
|
KVM_S390_VM_CPU_PROCESSOR_SUBFUNC)) {
|
|
/* hardware support might be missing, IBC will handle most of this */
|
|
return 0;
|
|
}
|
|
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_PLO, prop.plo);
|
|
if (test_bit(S390_FEAT_TOD_CLOCK_STEERING, features)) {
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_PTFF, prop.ptff);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA, features)) {
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_KMAC, prop.kmac);
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_KMC, prop.kmc);
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_KM, prop.km);
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_KIMD, prop.kimd);
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_KLMD, prop.klmd);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA_EXT_3, features)) {
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_PCKMO, prop.pckmo);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA_EXT_4, features)) {
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_KMCTR, prop.kmctr);
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_KMF, prop.kmf);
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_KMO, prop.kmo);
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_PCC, prop.pcc);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA_EXT_5, features)) {
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_PPNO, prop.ppno);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA_EXT_8, features)) {
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_KMA, prop.kma);
|
|
}
|
|
if (test_bit(S390_FEAT_MSA_EXT_9, features)) {
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_KDSA, prop.kdsa);
|
|
}
|
|
if (test_bit(S390_FEAT_ESORT_BASE, features)) {
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_SORTL, prop.sortl);
|
|
}
|
|
if (test_bit(S390_FEAT_DEFLATE_BASE, features)) {
|
|
s390_fill_feat_block(features, S390_FEAT_TYPE_DFLTCC, prop.dfltcc);
|
|
}
|
|
return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
|
|
}
|
|
|
|
static bool ap_available(void)
|
|
{
|
|
return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO,
|
|
KVM_S390_VM_CRYPTO_ENABLE_APIE);
|
|
}
|
|
|
|
static bool ap_enabled(const S390FeatBitmap features)
|
|
{
|
|
return test_bit(S390_FEAT_AP, features);
|
|
}
|
|
|
|
static bool uv_feat_supported(void)
|
|
{
|
|
return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
|
|
KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST);
|
|
}
|
|
|
|
static int query_uv_feat_guest(S390FeatBitmap features)
|
|
{
|
|
struct kvm_s390_vm_cpu_uv_feat prop = {};
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_CPU_MODEL,
|
|
.attr = KVM_S390_VM_CPU_MACHINE_UV_FEAT_GUEST,
|
|
.addr = (uint64_t) &prop,
|
|
};
|
|
int rc;
|
|
|
|
/* AP support check is currently the only user of the UV feature test */
|
|
if (!(uv_feat_supported() && ap_available())) {
|
|
return 0;
|
|
}
|
|
|
|
rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
|
|
if (prop.ap) {
|
|
set_bit(S390_FEAT_UV_FEAT_AP, features);
|
|
}
|
|
if (prop.ap_intr) {
|
|
set_bit(S390_FEAT_UV_FEAT_AP_INTR, features);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_to_feat[][2] = {
|
|
{ KVM_S390_VM_CPU_FEAT_ESOP, S390_FEAT_ESOP },
|
|
{ KVM_S390_VM_CPU_FEAT_SIEF2, S390_FEAT_SIE_F2 },
|
|
{ KVM_S390_VM_CPU_FEAT_64BSCAO , S390_FEAT_SIE_64BSCAO },
|
|
{ KVM_S390_VM_CPU_FEAT_SIIF, S390_FEAT_SIE_SIIF },
|
|
{ KVM_S390_VM_CPU_FEAT_GPERE, S390_FEAT_SIE_GPERE },
|
|
{ KVM_S390_VM_CPU_FEAT_GSLS, S390_FEAT_SIE_GSLS },
|
|
{ KVM_S390_VM_CPU_FEAT_IB, S390_FEAT_SIE_IB },
|
|
{ KVM_S390_VM_CPU_FEAT_CEI, S390_FEAT_SIE_CEI },
|
|
{ KVM_S390_VM_CPU_FEAT_IBS, S390_FEAT_SIE_IBS },
|
|
{ KVM_S390_VM_CPU_FEAT_SKEY, S390_FEAT_SIE_SKEY },
|
|
{ KVM_S390_VM_CPU_FEAT_CMMA, S390_FEAT_SIE_CMMA },
|
|
{ KVM_S390_VM_CPU_FEAT_PFMFI, S390_FEAT_SIE_PFMFI},
|
|
{ KVM_S390_VM_CPU_FEAT_SIGPIF, S390_FEAT_SIE_SIGPIF},
|
|
{ KVM_S390_VM_CPU_FEAT_KSS, S390_FEAT_SIE_KSS},
|
|
};
|
|
|
|
static int query_cpu_feat(S390FeatBitmap features)
|
|
{
|
|
struct kvm_s390_vm_cpu_feat prop = {};
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_CPU_MODEL,
|
|
.attr = KVM_S390_VM_CPU_MACHINE_FEAT,
|
|
.addr = (uint64_t) &prop,
|
|
};
|
|
int rc;
|
|
int i;
|
|
|
|
rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(kvm_to_feat); i++) {
|
|
if (test_be_bit(kvm_to_feat[i][0], (uint8_t *) prop.feat)) {
|
|
set_bit(kvm_to_feat[i][1], features);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int configure_cpu_feat(const S390FeatBitmap features)
|
|
{
|
|
struct kvm_s390_vm_cpu_feat prop = {};
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_CPU_MODEL,
|
|
.attr = KVM_S390_VM_CPU_PROCESSOR_FEAT,
|
|
.addr = (uint64_t) &prop,
|
|
};
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(kvm_to_feat); i++) {
|
|
if (test_bit(kvm_to_feat[i][1], features)) {
|
|
set_be_bit(kvm_to_feat[i][0], (uint8_t *) prop.feat);
|
|
}
|
|
}
|
|
return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
|
|
}
|
|
|
|
bool kvm_s390_cpu_models_supported(void)
|
|
{
|
|
if (!cpu_model_allowed()) {
|
|
/* compatibility machines interfere with the cpu model */
|
|
return false;
|
|
}
|
|
return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
|
|
KVM_S390_VM_CPU_MACHINE) &&
|
|
kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
|
|
KVM_S390_VM_CPU_PROCESSOR) &&
|
|
kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
|
|
KVM_S390_VM_CPU_MACHINE_FEAT) &&
|
|
kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
|
|
KVM_S390_VM_CPU_PROCESSOR_FEAT) &&
|
|
kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
|
|
KVM_S390_VM_CPU_MACHINE_SUBFUNC);
|
|
}
|
|
|
|
void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
|
|
{
|
|
struct kvm_s390_vm_cpu_machine prop = {};
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_CPU_MODEL,
|
|
.attr = KVM_S390_VM_CPU_MACHINE,
|
|
.addr = (uint64_t) &prop,
|
|
};
|
|
uint16_t unblocked_ibc = 0, cpu_type = 0;
|
|
int rc;
|
|
|
|
memset(model, 0, sizeof(*model));
|
|
|
|
if (!kvm_s390_cpu_models_supported()) {
|
|
error_setg(errp, "KVM doesn't support CPU models");
|
|
return;
|
|
}
|
|
|
|
/* query the basic cpu model properties */
|
|
rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
|
|
if (rc) {
|
|
error_setg(errp, "KVM: Error querying host CPU model: %d", rc);
|
|
return;
|
|
}
|
|
|
|
cpu_type = cpuid_type(prop.cpuid);
|
|
if (has_ibc(prop.ibc)) {
|
|
model->lowest_ibc = lowest_ibc(prop.ibc);
|
|
unblocked_ibc = unblocked_ibc(prop.ibc);
|
|
}
|
|
model->cpu_id = cpuid_id(prop.cpuid);
|
|
model->cpu_id_format = cpuid_format(prop.cpuid);
|
|
model->cpu_ver = 0xff;
|
|
|
|
/* get supported cpu features indicated via STFL(E) */
|
|
s390_add_from_feat_block(model->features, S390_FEAT_TYPE_STFL,
|
|
(uint8_t *) prop.fac_mask);
|
|
/* dat-enhancement facility 2 has no bit but was introduced with stfle */
|
|
if (test_bit(S390_FEAT_STFLE, model->features)) {
|
|
set_bit(S390_FEAT_DAT_ENH_2, model->features);
|
|
}
|
|
/* get supported cpu features indicated e.g. via SCLP */
|
|
rc = query_cpu_feat(model->features);
|
|
if (rc) {
|
|
error_setg(errp, "KVM: Error querying CPU features: %d", rc);
|
|
return;
|
|
}
|
|
/* get supported cpu subfunctions indicated via query / test bit */
|
|
rc = query_cpu_subfunc(model->features);
|
|
if (rc) {
|
|
error_setg(errp, "KVM: Error querying CPU subfunctions: %d", rc);
|
|
return;
|
|
}
|
|
|
|
/* PTFF subfunctions might be indicated although kernel support missing */
|
|
if (!test_bit(S390_FEAT_MULTIPLE_EPOCH, model->features)) {
|
|
clear_bit(S390_FEAT_PTFF_QSIE, model->features);
|
|
clear_bit(S390_FEAT_PTFF_QTOUE, model->features);
|
|
clear_bit(S390_FEAT_PTFF_STOE, model->features);
|
|
clear_bit(S390_FEAT_PTFF_STOUE, model->features);
|
|
}
|
|
|
|
/* with cpu model support, CMM is only indicated if really available */
|
|
if (kvm_s390_cmma_available()) {
|
|
set_bit(S390_FEAT_CMM, model->features);
|
|
} else {
|
|
/* no cmm -> no cmm nt */
|
|
clear_bit(S390_FEAT_CMM_NT, model->features);
|
|
}
|
|
|
|
/* bpb needs kernel support for migration, VSIE and reset */
|
|
if (!kvm_check_extension(kvm_state, KVM_CAP_S390_BPB)) {
|
|
clear_bit(S390_FEAT_BPB, model->features);
|
|
}
|
|
|
|
/*
|
|
* If we have support for protected virtualization, indicate
|
|
* the protected virtualization IPL unpack facility.
|
|
*/
|
|
if (cap_protected) {
|
|
set_bit(S390_FEAT_UNPACK, model->features);
|
|
}
|
|
|
|
/*
|
|
* If we have kernel support for CPU Topology indicate the
|
|
* configuration-topology facility.
|
|
*/
|
|
if (kvm_check_extension(kvm_state, KVM_CAP_S390_CPU_TOPOLOGY)) {
|
|
set_bit(S390_FEAT_CONFIGURATION_TOPOLOGY, model->features);
|
|
}
|
|
|
|
/* We emulate a zPCI bus and AEN, therefore we don't need HW support */
|
|
set_bit(S390_FEAT_ZPCI, model->features);
|
|
set_bit(S390_FEAT_ADAPTER_EVENT_NOTIFICATION, model->features);
|
|
|
|
if (s390_known_cpu_type(cpu_type)) {
|
|
/* we want the exact model, even if some features are missing */
|
|
model->def = s390_find_cpu_def(cpu_type, ibc_gen(unblocked_ibc),
|
|
ibc_ec_ga(unblocked_ibc), NULL);
|
|
} else {
|
|
/* model unknown, e.g. too new - search using features */
|
|
model->def = s390_find_cpu_def(0, ibc_gen(unblocked_ibc),
|
|
ibc_ec_ga(unblocked_ibc),
|
|
model->features);
|
|
}
|
|
if (!model->def) {
|
|
error_setg(errp, "KVM: host CPU model could not be identified");
|
|
return;
|
|
}
|
|
/* for now, we can only provide the AP feature with HW support */
|
|
if (ap_available()) {
|
|
set_bit(S390_FEAT_AP, model->features);
|
|
}
|
|
|
|
/*
|
|
* Extended-Length SCCB is handled entirely within QEMU.
|
|
* For PV guests this is completely fenced by the Ultravisor, as Service
|
|
* Call error checking and STFLE interpretation are handled via SIE.
|
|
*/
|
|
set_bit(S390_FEAT_EXTENDED_LENGTH_SCCB, model->features);
|
|
|
|
if (kvm_check_extension(kvm_state, KVM_CAP_S390_DIAG318)) {
|
|
set_bit(S390_FEAT_DIAG_318, model->features);
|
|
}
|
|
|
|
/* Test for Ultravisor features that influence secure guest behavior */
|
|
query_uv_feat_guest(model->features);
|
|
|
|
/* strip of features that are not part of the maximum model */
|
|
bitmap_and(model->features, model->features, model->def->full_feat,
|
|
S390_FEAT_MAX);
|
|
}
|
|
|
|
static int configure_uv_feat_guest(const S390FeatBitmap features)
|
|
{
|
|
struct kvm_s390_vm_cpu_uv_feat uv_feat = {};
|
|
struct kvm_device_attr attribute = {
|
|
.group = KVM_S390_VM_CPU_MODEL,
|
|
.attr = KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST,
|
|
.addr = (__u64) &uv_feat,
|
|
};
|
|
|
|
/* AP support check is currently the only user of the UV feature test */
|
|
if (!(uv_feat_supported() && ap_enabled(features))) {
|
|
return 0;
|
|
}
|
|
|
|
if (test_bit(S390_FEAT_UV_FEAT_AP, features)) {
|
|
uv_feat.ap = 1;
|
|
}
|
|
if (test_bit(S390_FEAT_UV_FEAT_AP_INTR, features)) {
|
|
uv_feat.ap_intr = 1;
|
|
}
|
|
|
|
return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute);
|
|
}
|
|
|
|
static void kvm_s390_configure_apie(bool interpret)
|
|
{
|
|
uint64_t attr = interpret ? KVM_S390_VM_CRYPTO_ENABLE_APIE :
|
|
KVM_S390_VM_CRYPTO_DISABLE_APIE;
|
|
|
|
if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) {
|
|
kvm_s390_set_crypto_attr(attr);
|
|
}
|
|
}
|
|
|
|
void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp)
|
|
{
|
|
struct kvm_s390_vm_cpu_processor prop = {
|
|
.fac_list = { 0 },
|
|
};
|
|
struct kvm_device_attr attr = {
|
|
.group = KVM_S390_VM_CPU_MODEL,
|
|
.attr = KVM_S390_VM_CPU_PROCESSOR,
|
|
.addr = (uint64_t) &prop,
|
|
};
|
|
int rc;
|
|
|
|
if (!model) {
|
|
/* compatibility handling if cpu models are disabled */
|
|
if (kvm_s390_cmma_available()) {
|
|
kvm_s390_enable_cmma();
|
|
}
|
|
return;
|
|
}
|
|
if (!kvm_s390_cpu_models_supported()) {
|
|
error_setg(errp, "KVM doesn't support CPU models");
|
|
return;
|
|
}
|
|
prop.cpuid = s390_cpuid_from_cpu_model(model);
|
|
prop.ibc = s390_ibc_from_cpu_model(model);
|
|
/* configure cpu features indicated via STFL(e) */
|
|
s390_fill_feat_block(model->features, S390_FEAT_TYPE_STFL,
|
|
(uint8_t *) prop.fac_list);
|
|
rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
|
|
if (rc) {
|
|
error_setg(errp, "KVM: Error configuring the CPU model: %d", rc);
|
|
return;
|
|
}
|
|
/* configure cpu features indicated e.g. via SCLP */
|
|
rc = configure_cpu_feat(model->features);
|
|
if (rc) {
|
|
error_setg(errp, "KVM: Error configuring CPU features: %d", rc);
|
|
return;
|
|
}
|
|
/* configure cpu subfunctions indicated via query / test bit */
|
|
rc = configure_cpu_subfunc(model->features);
|
|
if (rc) {
|
|
error_setg(errp, "KVM: Error configuring CPU subfunctions: %d", rc);
|
|
return;
|
|
}
|
|
/* enable CMM via CMMA */
|
|
if (test_bit(S390_FEAT_CMM, model->features)) {
|
|
kvm_s390_enable_cmma();
|
|
}
|
|
|
|
if (ap_enabled(model->features)) {
|
|
kvm_s390_configure_apie(true);
|
|
}
|
|
|
|
/* configure UV-features for the guest indicated via query / test_bit */
|
|
rc = configure_uv_feat_guest(model->features);
|
|
if (rc) {
|
|
error_setg(errp, "KVM: Error configuring CPU UV features %d", rc);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void kvm_s390_restart_interrupt(S390CPU *cpu)
|
|
{
|
|
struct kvm_s390_irq irq = {
|
|
.type = KVM_S390_RESTART,
|
|
};
|
|
|
|
kvm_s390_vcpu_interrupt(cpu, &irq);
|
|
}
|
|
|
|
void kvm_s390_stop_interrupt(S390CPU *cpu)
|
|
{
|
|
struct kvm_s390_irq irq = {
|
|
.type = KVM_S390_SIGP_STOP,
|
|
};
|
|
|
|
kvm_s390_vcpu_interrupt(cpu, &irq);
|
|
}
|
|
|
|
bool kvm_arch_cpu_check_are_resettable(void)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
int kvm_s390_get_zpci_op(void)
|
|
{
|
|
return cap_zpci_op;
|
|
}
|
|
|
|
int kvm_s390_topology_set_mtcr(uint64_t attr)
|
|
{
|
|
struct kvm_device_attr attribute = {
|
|
.group = KVM_S390_VM_CPU_TOPOLOGY,
|
|
.attr = attr,
|
|
};
|
|
|
|
if (!s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY)) {
|
|
return 0;
|
|
}
|
|
if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_TOPOLOGY, attr)) {
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute);
|
|
}
|
|
|
|
void kvm_arch_accel_class_init(ObjectClass *oc)
|
|
{
|
|
}
|