e8d12a55f6
PV_ENABLE (and maybe others) might return -EINTR when a signal is
pending. See the Linux kernel patch "s390/gmap: return proper error code
on ksm unsharing" for details. Let us retry the ioctl in that case.
Fixes: c3347ed0d2 ("s390x: protvirt: Support unpack facility")
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Tested-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20200327124616.34866-1-borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
/*
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* Protected Virtualization functions
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*
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* Copyright IBM Corp. 2020
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* Author(s):
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* Janosch Frank <frankja@linux.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include "qemu/osdep.h"
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#include <linux/kvm.h>
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#include "qemu/error-report.h"
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#include "sysemu/kvm.h"
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#include "hw/s390x/pv.h"
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static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data)
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{
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struct kvm_pv_cmd pv_cmd = {
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.cmd = cmd,
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.data = (uint64_t)data,
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};
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int rc;
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do {
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rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd);
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} while (rc == -EINTR);
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if (rc) {
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error_report("KVM PV command %d (%s) failed: header rc %x rrc %x "
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"IOCTL rc: %d", cmd, cmdname, pv_cmd.rc, pv_cmd.rrc,
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rc);
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}
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return rc;
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}
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/*
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* This macro lets us pass the command as a string to the function so
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* we can print it on an error.
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*/
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#define s390_pv_cmd(cmd, data) __s390_pv_cmd(cmd, #cmd, data);
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#define s390_pv_cmd_exit(cmd, data) \
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{ \
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int rc; \
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\
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rc = __s390_pv_cmd(cmd, #cmd, data);\
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if (rc) { \
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exit(1); \
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} \
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}
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int s390_pv_vm_enable(void)
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{
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return s390_pv_cmd(KVM_PV_ENABLE, NULL);
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}
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void s390_pv_vm_disable(void)
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{
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s390_pv_cmd_exit(KVM_PV_DISABLE, NULL);
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}
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int s390_pv_set_sec_parms(uint64_t origin, uint64_t length)
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{
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struct kvm_s390_pv_sec_parm args = {
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.origin = origin,
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.length = length,
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};
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return s390_pv_cmd(KVM_PV_SET_SEC_PARMS, &args);
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}
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/*
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* Called for each component in the SE type IPL parameter block 0.
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*/
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int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak)
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{
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struct kvm_s390_pv_unp args = {
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.addr = addr,
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.size = size,
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.tweak = tweak,
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};
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return s390_pv_cmd(KVM_PV_UNPACK, &args);
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}
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void s390_pv_perf_clear_reset(void)
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{
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s390_pv_cmd_exit(KVM_PV_PREP_RESET, NULL);
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}
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int s390_pv_verify(void)
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{
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return s390_pv_cmd(KVM_PV_VERIFY, NULL);
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}
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void s390_pv_unshare(void)
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{
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s390_pv_cmd_exit(KVM_PV_UNSHARE_ALL, NULL);
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}
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