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qemu/target/arm/hvf/hvf.c
Philippe Mathieu-Daudé 5a3d2c3562 target/arm/hvf: Clean up local variable shadowing 
Per Peter Maydell analysis [*]:

  The hvf_vcpu_exec() function is not documented, but in practice
  its caller expects it to return either EXCP_DEBUG (for "this was
  a guest debug exception you need to deal with") or something else
  (presumably the intention being 0 for OK).

  The hvf_sysreg_read() and hvf_sysreg_write() functions are also not
  documented, but they return 0 on success, or 1 for a completely
  unrecognized sysreg where we've raised the UNDEF exception (but
  not if we raised an UNDEF exception for an unrecognized GIC sysreg --
  I think this is a bug). We use this return value to decide whether
  we need to advance the PC past the insn or not. It's not the same
  as the return value we want to return from hvf_vcpu_exec().

  Retain the variable as locally scoped but give it a name that
  doesn't clash with the other function-scoped variable.

This fixes:

  target/arm/hvf/hvf.c:1936:13: error: declaration shadows a local variable [-Werror,-Wshadow]
        int ret = 0;
            ^
  target/arm/hvf/hvf.c:1807:9: note: previous declaration is here
    int ret;
        ^
[*] https://lore.kernel.org/qemu-devel/CAFEAcA_e+fU6JKtS+W63wr9cCJ6btu_hT_ydZWOwC0kBkDYYYQ@mail.gmail.com/

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-4-philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2023-09-29 10:07:14 +02:00

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/*
* QEMU Hypervisor.framework support for Apple Silicon
* Copyright 2020 Alexander Graf <agraf@csgraf.de>
* Copyright 2020 Google LLC
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "sysemu/runstate.h"
#include "sysemu/hvf.h"
#include "sysemu/hvf_int.h"
#include "sysemu/hw_accel.h"
#include "hvf_arm.h"
#include "cpregs.h"
#include <mach/mach_time.h>
#include "exec/address-spaces.h"
#include "hw/irq.h"
#include "qemu/main-loop.h"
#include "sysemu/cpus.h"
#include "arm-powerctl.h"
#include "target/arm/cpu.h"
#include "target/arm/internals.h"
#include "trace/trace-target_arm_hvf.h"
#include "migration/vmstate.h"
#include "exec/gdbstub.h"
#define MDSCR_EL1_SS_SHIFT 0
#define MDSCR_EL1_MDE_SHIFT 15
static uint16_t dbgbcr_regs[] = {
HV_SYS_REG_DBGBCR0_EL1,
HV_SYS_REG_DBGBCR1_EL1,
HV_SYS_REG_DBGBCR2_EL1,
HV_SYS_REG_DBGBCR3_EL1,
HV_SYS_REG_DBGBCR4_EL1,
HV_SYS_REG_DBGBCR5_EL1,
HV_SYS_REG_DBGBCR6_EL1,
HV_SYS_REG_DBGBCR7_EL1,
HV_SYS_REG_DBGBCR8_EL1,
HV_SYS_REG_DBGBCR9_EL1,
HV_SYS_REG_DBGBCR10_EL1,
HV_SYS_REG_DBGBCR11_EL1,
HV_SYS_REG_DBGBCR12_EL1,
HV_SYS_REG_DBGBCR13_EL1,
HV_SYS_REG_DBGBCR14_EL1,
HV_SYS_REG_DBGBCR15_EL1,
};
static uint16_t dbgbvr_regs[] = {
HV_SYS_REG_DBGBVR0_EL1,
HV_SYS_REG_DBGBVR1_EL1,
HV_SYS_REG_DBGBVR2_EL1,
HV_SYS_REG_DBGBVR3_EL1,
HV_SYS_REG_DBGBVR4_EL1,
HV_SYS_REG_DBGBVR5_EL1,
HV_SYS_REG_DBGBVR6_EL1,
HV_SYS_REG_DBGBVR7_EL1,
HV_SYS_REG_DBGBVR8_EL1,
HV_SYS_REG_DBGBVR9_EL1,
HV_SYS_REG_DBGBVR10_EL1,
HV_SYS_REG_DBGBVR11_EL1,
HV_SYS_REG_DBGBVR12_EL1,
HV_SYS_REG_DBGBVR13_EL1,
HV_SYS_REG_DBGBVR14_EL1,
HV_SYS_REG_DBGBVR15_EL1,
};
static uint16_t dbgwcr_regs[] = {
HV_SYS_REG_DBGWCR0_EL1,
HV_SYS_REG_DBGWCR1_EL1,
HV_SYS_REG_DBGWCR2_EL1,
HV_SYS_REG_DBGWCR3_EL1,
HV_SYS_REG_DBGWCR4_EL1,
HV_SYS_REG_DBGWCR5_EL1,
HV_SYS_REG_DBGWCR6_EL1,
HV_SYS_REG_DBGWCR7_EL1,
HV_SYS_REG_DBGWCR8_EL1,
HV_SYS_REG_DBGWCR9_EL1,
HV_SYS_REG_DBGWCR10_EL1,
HV_SYS_REG_DBGWCR11_EL1,
HV_SYS_REG_DBGWCR12_EL1,
HV_SYS_REG_DBGWCR13_EL1,
HV_SYS_REG_DBGWCR14_EL1,
HV_SYS_REG_DBGWCR15_EL1,
};
static uint16_t dbgwvr_regs[] = {
HV_SYS_REG_DBGWVR0_EL1,
HV_SYS_REG_DBGWVR1_EL1,
HV_SYS_REG_DBGWVR2_EL1,
HV_SYS_REG_DBGWVR3_EL1,
HV_SYS_REG_DBGWVR4_EL1,
HV_SYS_REG_DBGWVR5_EL1,
HV_SYS_REG_DBGWVR6_EL1,
HV_SYS_REG_DBGWVR7_EL1,
HV_SYS_REG_DBGWVR8_EL1,
HV_SYS_REG_DBGWVR9_EL1,
HV_SYS_REG_DBGWVR10_EL1,
HV_SYS_REG_DBGWVR11_EL1,
HV_SYS_REG_DBGWVR12_EL1,
HV_SYS_REG_DBGWVR13_EL1,
HV_SYS_REG_DBGWVR14_EL1,
HV_SYS_REG_DBGWVR15_EL1,
};
static inline int hvf_arm_num_brps(hv_vcpu_config_t config)
{
uint64_t val;
hv_return_t ret;
ret = hv_vcpu_config_get_feature_reg(config, HV_FEATURE_REG_ID_AA64DFR0_EL1,
&val);
assert_hvf_ok(ret);
return FIELD_EX64(val, ID_AA64DFR0, BRPS) + 1;
}
static inline int hvf_arm_num_wrps(hv_vcpu_config_t config)
{
uint64_t val;
hv_return_t ret;
ret = hv_vcpu_config_get_feature_reg(config, HV_FEATURE_REG_ID_AA64DFR0_EL1,
&val);
assert_hvf_ok(ret);
return FIELD_EX64(val, ID_AA64DFR0, WRPS) + 1;
}
void hvf_arm_init_debug(void)
{
hv_vcpu_config_t config;
config = hv_vcpu_config_create();
max_hw_bps = hvf_arm_num_brps(config);
hw_breakpoints =
g_array_sized_new(true, true, sizeof(HWBreakpoint), max_hw_bps);
max_hw_wps = hvf_arm_num_wrps(config);
hw_watchpoints =
g_array_sized_new(true, true, sizeof(HWWatchpoint), max_hw_wps);
}
#define HVF_SYSREG(crn, crm, op0, op1, op2) \
ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP, crn, crm, op0, op1, op2)
#define PL1_WRITE_MASK 0x4
#define SYSREG_OP0_SHIFT 20
#define SYSREG_OP0_MASK 0x3
#define SYSREG_OP0(sysreg) ((sysreg >> SYSREG_OP0_SHIFT) & SYSREG_OP0_MASK)
#define SYSREG_OP1_SHIFT 14
#define SYSREG_OP1_MASK 0x7
#define SYSREG_OP1(sysreg) ((sysreg >> SYSREG_OP1_SHIFT) & SYSREG_OP1_MASK)
#define SYSREG_CRN_SHIFT 10
#define SYSREG_CRN_MASK 0xf
#define SYSREG_CRN(sysreg) ((sysreg >> SYSREG_CRN_SHIFT) & SYSREG_CRN_MASK)
#define SYSREG_CRM_SHIFT 1
#define SYSREG_CRM_MASK 0xf
#define SYSREG_CRM(sysreg) ((sysreg >> SYSREG_CRM_SHIFT) & SYSREG_CRM_MASK)
#define SYSREG_OP2_SHIFT 17
#define SYSREG_OP2_MASK 0x7
#define SYSREG_OP2(sysreg) ((sysreg >> SYSREG_OP2_SHIFT) & SYSREG_OP2_MASK)
#define SYSREG(op0, op1, crn, crm, op2) \
((op0 << SYSREG_OP0_SHIFT) | \
(op1 << SYSREG_OP1_SHIFT) | \
(crn << SYSREG_CRN_SHIFT) | \
(crm << SYSREG_CRM_SHIFT) | \
(op2 << SYSREG_OP2_SHIFT))
#define SYSREG_MASK \
SYSREG(SYSREG_OP0_MASK, \
SYSREG_OP1_MASK, \
SYSREG_CRN_MASK, \
SYSREG_CRM_MASK, \
SYSREG_OP2_MASK)
#define SYSREG_OSLAR_EL1 SYSREG(2, 0, 1, 0, 4)
#define SYSREG_OSLSR_EL1 SYSREG(2, 0, 1, 1, 4)
#define SYSREG_OSDLR_EL1 SYSREG(2, 0, 1, 3, 4)
#define SYSREG_CNTPCT_EL0 SYSREG(3, 3, 14, 0, 1)
#define SYSREG_PMCR_EL0 SYSREG(3, 3, 9, 12, 0)
#define SYSREG_PMUSERENR_EL0 SYSREG(3, 3, 9, 14, 0)
#define SYSREG_PMCNTENSET_EL0 SYSREG(3, 3, 9, 12, 1)
#define SYSREG_PMCNTENCLR_EL0 SYSREG(3, 3, 9, 12, 2)
#define SYSREG_PMINTENCLR_EL1 SYSREG(3, 0, 9, 14, 2)
#define SYSREG_PMOVSCLR_EL0 SYSREG(3, 3, 9, 12, 3)
#define SYSREG_PMSWINC_EL0 SYSREG(3, 3, 9, 12, 4)
#define SYSREG_PMSELR_EL0 SYSREG(3, 3, 9, 12, 5)
#define SYSREG_PMCEID0_EL0 SYSREG(3, 3, 9, 12, 6)
#define SYSREG_PMCEID1_EL0 SYSREG(3, 3, 9, 12, 7)
#define SYSREG_PMCCNTR_EL0 SYSREG(3, 3, 9, 13, 0)
#define SYSREG_PMCCFILTR_EL0 SYSREG(3, 3, 14, 15, 7)
#define SYSREG_ICC_AP0R0_EL1 SYSREG(3, 0, 12, 8, 4)
#define SYSREG_ICC_AP0R1_EL1 SYSREG(3, 0, 12, 8, 5)
#define SYSREG_ICC_AP0R2_EL1 SYSREG(3, 0, 12, 8, 6)
#define SYSREG_ICC_AP0R3_EL1 SYSREG(3, 0, 12, 8, 7)
#define SYSREG_ICC_AP1R0_EL1 SYSREG(3, 0, 12, 9, 0)
#define SYSREG_ICC_AP1R1_EL1 SYSREG(3, 0, 12, 9, 1)
#define SYSREG_ICC_AP1R2_EL1 SYSREG(3, 0, 12, 9, 2)
#define SYSREG_ICC_AP1R3_EL1 SYSREG(3, 0, 12, 9, 3)
#define SYSREG_ICC_ASGI1R_EL1 SYSREG(3, 0, 12, 11, 6)
#define SYSREG_ICC_BPR0_EL1 SYSREG(3, 0, 12, 8, 3)
#define SYSREG_ICC_BPR1_EL1 SYSREG(3, 0, 12, 12, 3)
#define SYSREG_ICC_CTLR_EL1 SYSREG(3, 0, 12, 12, 4)
#define SYSREG_ICC_DIR_EL1 SYSREG(3, 0, 12, 11, 1)
#define SYSREG_ICC_EOIR0_EL1 SYSREG(3, 0, 12, 8, 1)
#define SYSREG_ICC_EOIR1_EL1 SYSREG(3, 0, 12, 12, 1)
#define SYSREG_ICC_HPPIR0_EL1 SYSREG(3, 0, 12, 8, 2)
#define SYSREG_ICC_HPPIR1_EL1 SYSREG(3, 0, 12, 12, 2)
#define SYSREG_ICC_IAR0_EL1 SYSREG(3, 0, 12, 8, 0)
#define SYSREG_ICC_IAR1_EL1 SYSREG(3, 0, 12, 12, 0)
#define SYSREG_ICC_IGRPEN0_EL1 SYSREG(3, 0, 12, 12, 6)
#define SYSREG_ICC_IGRPEN1_EL1 SYSREG(3, 0, 12, 12, 7)
#define SYSREG_ICC_PMR_EL1 SYSREG(3, 0, 4, 6, 0)
#define SYSREG_ICC_RPR_EL1 SYSREG(3, 0, 12, 11, 3)
#define SYSREG_ICC_SGI0R_EL1 SYSREG(3, 0, 12, 11, 7)
#define SYSREG_ICC_SGI1R_EL1 SYSREG(3, 0, 12, 11, 5)
#define SYSREG_ICC_SRE_EL1 SYSREG(3, 0, 12, 12, 5)
#define SYSREG_MDSCR_EL1 SYSREG(2, 0, 0, 2, 2)
#define SYSREG_DBGBVR0_EL1 SYSREG(2, 0, 0, 0, 4)
#define SYSREG_DBGBCR0_EL1 SYSREG(2, 0, 0, 0, 5)
#define SYSREG_DBGWVR0_EL1 SYSREG(2, 0, 0, 0, 6)
#define SYSREG_DBGWCR0_EL1 SYSREG(2, 0, 0, 0, 7)
#define SYSREG_DBGBVR1_EL1 SYSREG(2, 0, 0, 1, 4)
#define SYSREG_DBGBCR1_EL1 SYSREG(2, 0, 0, 1, 5)
#define SYSREG_DBGWVR1_EL1 SYSREG(2, 0, 0, 1, 6)
#define SYSREG_DBGWCR1_EL1 SYSREG(2, 0, 0, 1, 7)
#define SYSREG_DBGBVR2_EL1 SYSREG(2, 0, 0, 2, 4)
#define SYSREG_DBGBCR2_EL1 SYSREG(2, 0, 0, 2, 5)
#define SYSREG_DBGWVR2_EL1 SYSREG(2, 0, 0, 2, 6)
#define SYSREG_DBGWCR2_EL1 SYSREG(2, 0, 0, 2, 7)
#define SYSREG_DBGBVR3_EL1 SYSREG(2, 0, 0, 3, 4)
#define SYSREG_DBGBCR3_EL1 SYSREG(2, 0, 0, 3, 5)
#define SYSREG_DBGWVR3_EL1 SYSREG(2, 0, 0, 3, 6)
#define SYSREG_DBGWCR3_EL1 SYSREG(2, 0, 0, 3, 7)
#define SYSREG_DBGBVR4_EL1 SYSREG(2, 0, 0, 4, 4)
#define SYSREG_DBGBCR4_EL1 SYSREG(2, 0, 0, 4, 5)
#define SYSREG_DBGWVR4_EL1 SYSREG(2, 0, 0, 4, 6)
#define SYSREG_DBGWCR4_EL1 SYSREG(2, 0, 0, 4, 7)
#define SYSREG_DBGBVR5_EL1 SYSREG(2, 0, 0, 5, 4)
#define SYSREG_DBGBCR5_EL1 SYSREG(2, 0, 0, 5, 5)
#define SYSREG_DBGWVR5_EL1 SYSREG(2, 0, 0, 5, 6)
#define SYSREG_DBGWCR5_EL1 SYSREG(2, 0, 0, 5, 7)
#define SYSREG_DBGBVR6_EL1 SYSREG(2, 0, 0, 6, 4)
#define SYSREG_DBGBCR6_EL1 SYSREG(2, 0, 0, 6, 5)
#define SYSREG_DBGWVR6_EL1 SYSREG(2, 0, 0, 6, 6)
#define SYSREG_DBGWCR6_EL1 SYSREG(2, 0, 0, 6, 7)
#define SYSREG_DBGBVR7_EL1 SYSREG(2, 0, 0, 7, 4)
#define SYSREG_DBGBCR7_EL1 SYSREG(2, 0, 0, 7, 5)
#define SYSREG_DBGWVR7_EL1 SYSREG(2, 0, 0, 7, 6)
#define SYSREG_DBGWCR7_EL1 SYSREG(2, 0, 0, 7, 7)
#define SYSREG_DBGBVR8_EL1 SYSREG(2, 0, 0, 8, 4)
#define SYSREG_DBGBCR8_EL1 SYSREG(2, 0, 0, 8, 5)
#define SYSREG_DBGWVR8_EL1 SYSREG(2, 0, 0, 8, 6)
#define SYSREG_DBGWCR8_EL1 SYSREG(2, 0, 0, 8, 7)
#define SYSREG_DBGBVR9_EL1 SYSREG(2, 0, 0, 9, 4)
#define SYSREG_DBGBCR9_EL1 SYSREG(2, 0, 0, 9, 5)
#define SYSREG_DBGWVR9_EL1 SYSREG(2, 0, 0, 9, 6)
#define SYSREG_DBGWCR9_EL1 SYSREG(2, 0, 0, 9, 7)
#define SYSREG_DBGBVR10_EL1 SYSREG(2, 0, 0, 10, 4)
#define SYSREG_DBGBCR10_EL1 SYSREG(2, 0, 0, 10, 5)
#define SYSREG_DBGWVR10_EL1 SYSREG(2, 0, 0, 10, 6)
#define SYSREG_DBGWCR10_EL1 SYSREG(2, 0, 0, 10, 7)
#define SYSREG_DBGBVR11_EL1 SYSREG(2, 0, 0, 11, 4)
#define SYSREG_DBGBCR11_EL1 SYSREG(2, 0, 0, 11, 5)
#define SYSREG_DBGWVR11_EL1 SYSREG(2, 0, 0, 11, 6)
#define SYSREG_DBGWCR11_EL1 SYSREG(2, 0, 0, 11, 7)
#define SYSREG_DBGBVR12_EL1 SYSREG(2, 0, 0, 12, 4)
#define SYSREG_DBGBCR12_EL1 SYSREG(2, 0, 0, 12, 5)
#define SYSREG_DBGWVR12_EL1 SYSREG(2, 0, 0, 12, 6)
#define SYSREG_DBGWCR12_EL1 SYSREG(2, 0, 0, 12, 7)
#define SYSREG_DBGBVR13_EL1 SYSREG(2, 0, 0, 13, 4)
#define SYSREG_DBGBCR13_EL1 SYSREG(2, 0, 0, 13, 5)
#define SYSREG_DBGWVR13_EL1 SYSREG(2, 0, 0, 13, 6)
#define SYSREG_DBGWCR13_EL1 SYSREG(2, 0, 0, 13, 7)
#define SYSREG_DBGBVR14_EL1 SYSREG(2, 0, 0, 14, 4)
#define SYSREG_DBGBCR14_EL1 SYSREG(2, 0, 0, 14, 5)
#define SYSREG_DBGWVR14_EL1 SYSREG(2, 0, 0, 14, 6)
#define SYSREG_DBGWCR14_EL1 SYSREG(2, 0, 0, 14, 7)
#define SYSREG_DBGBVR15_EL1 SYSREG(2, 0, 0, 15, 4)
#define SYSREG_DBGBCR15_EL1 SYSREG(2, 0, 0, 15, 5)
#define SYSREG_DBGWVR15_EL1 SYSREG(2, 0, 0, 15, 6)
#define SYSREG_DBGWCR15_EL1 SYSREG(2, 0, 0, 15, 7)
#define WFX_IS_WFE (1 << 0)
#define TMR_CTL_ENABLE (1 << 0)
#define TMR_CTL_IMASK (1 << 1)
#define TMR_CTL_ISTATUS (1 << 2)
static void hvf_wfi(CPUState *cpu);
typedef struct HVFVTimer {
/* Vtimer value during migration and paused state */
uint64_t vtimer_val;
} HVFVTimer;
static HVFVTimer vtimer;
typedef struct ARMHostCPUFeatures {
ARMISARegisters isar;
uint64_t features;
uint64_t midr;
uint32_t reset_sctlr;
const char *dtb_compatible;
} ARMHostCPUFeatures;
static ARMHostCPUFeatures arm_host_cpu_features;
struct hvf_reg_match {
int reg;
uint64_t offset;
};
static const struct hvf_reg_match hvf_reg_match[] = {
{ HV_REG_X0, offsetof(CPUARMState, xregs[0]) },
{ HV_REG_X1, offsetof(CPUARMState, xregs[1]) },
{ HV_REG_X2, offsetof(CPUARMState, xregs[2]) },
{ HV_REG_X3, offsetof(CPUARMState, xregs[3]) },
{ HV_REG_X4, offsetof(CPUARMState, xregs[4]) },
{ HV_REG_X5, offsetof(CPUARMState, xregs[5]) },
{ HV_REG_X6, offsetof(CPUARMState, xregs[6]) },
{ HV_REG_X7, offsetof(CPUARMState, xregs[7]) },
{ HV_REG_X8, offsetof(CPUARMState, xregs[8]) },
{ HV_REG_X9, offsetof(CPUARMState, xregs[9]) },
{ HV_REG_X10, offsetof(CPUARMState, xregs[10]) },
{ HV_REG_X11, offsetof(CPUARMState, xregs[11]) },
{ HV_REG_X12, offsetof(CPUARMState, xregs[12]) },
{ HV_REG_X13, offsetof(CPUARMState, xregs[13]) },
{ HV_REG_X14, offsetof(CPUARMState, xregs[14]) },
{ HV_REG_X15, offsetof(CPUARMState, xregs[15]) },
{ HV_REG_X16, offsetof(CPUARMState, xregs[16]) },
{ HV_REG_X17, offsetof(CPUARMState, xregs[17]) },
{ HV_REG_X18, offsetof(CPUARMState, xregs[18]) },
{ HV_REG_X19, offsetof(CPUARMState, xregs[19]) },
{ HV_REG_X20, offsetof(CPUARMState, xregs[20]) },
{ HV_REG_X21, offsetof(CPUARMState, xregs[21]) },
{ HV_REG_X22, offsetof(CPUARMState, xregs[22]) },
{ HV_REG_X23, offsetof(CPUARMState, xregs[23]) },
{ HV_REG_X24, offsetof(CPUARMState, xregs[24]) },
{ HV_REG_X25, offsetof(CPUARMState, xregs[25]) },
{ HV_REG_X26, offsetof(CPUARMState, xregs[26]) },
{ HV_REG_X27, offsetof(CPUARMState, xregs[27]) },
{ HV_REG_X28, offsetof(CPUARMState, xregs[28]) },
{ HV_REG_X29, offsetof(CPUARMState, xregs[29]) },
{ HV_REG_X30, offsetof(CPUARMState, xregs[30]) },
{ HV_REG_PC, offsetof(CPUARMState, pc) },
};
static const struct hvf_reg_match hvf_fpreg_match[] = {
{ HV_SIMD_FP_REG_Q0, offsetof(CPUARMState, vfp.zregs[0]) },
{ HV_SIMD_FP_REG_Q1, offsetof(CPUARMState, vfp.zregs[1]) },
{ HV_SIMD_FP_REG_Q2, offsetof(CPUARMState, vfp.zregs[2]) },
{ HV_SIMD_FP_REG_Q3, offsetof(CPUARMState, vfp.zregs[3]) },
{ HV_SIMD_FP_REG_Q4, offsetof(CPUARMState, vfp.zregs[4]) },
{ HV_SIMD_FP_REG_Q5, offsetof(CPUARMState, vfp.zregs[5]) },
{ HV_SIMD_FP_REG_Q6, offsetof(CPUARMState, vfp.zregs[6]) },
{ HV_SIMD_FP_REG_Q7, offsetof(CPUARMState, vfp.zregs[7]) },
{ HV_SIMD_FP_REG_Q8, offsetof(CPUARMState, vfp.zregs[8]) },
{ HV_SIMD_FP_REG_Q9, offsetof(CPUARMState, vfp.zregs[9]) },
{ HV_SIMD_FP_REG_Q10, offsetof(CPUARMState, vfp.zregs[10]) },
{ HV_SIMD_FP_REG_Q11, offsetof(CPUARMState, vfp.zregs[11]) },
{ HV_SIMD_FP_REG_Q12, offsetof(CPUARMState, vfp.zregs[12]) },
{ HV_SIMD_FP_REG_Q13, offsetof(CPUARMState, vfp.zregs[13]) },
{ HV_SIMD_FP_REG_Q14, offsetof(CPUARMState, vfp.zregs[14]) },
{ HV_SIMD_FP_REG_Q15, offsetof(CPUARMState, vfp.zregs[15]) },
{ HV_SIMD_FP_REG_Q16, offsetof(CPUARMState, vfp.zregs[16]) },
{ HV_SIMD_FP_REG_Q17, offsetof(CPUARMState, vfp.zregs[17]) },
{ HV_SIMD_FP_REG_Q18, offsetof(CPUARMState, vfp.zregs[18]) },
{ HV_SIMD_FP_REG_Q19, offsetof(CPUARMState, vfp.zregs[19]) },
{ HV_SIMD_FP_REG_Q20, offsetof(CPUARMState, vfp.zregs[20]) },
{ HV_SIMD_FP_REG_Q21, offsetof(CPUARMState, vfp.zregs[21]) },
{ HV_SIMD_FP_REG_Q22, offsetof(CPUARMState, vfp.zregs[22]) },
{ HV_SIMD_FP_REG_Q23, offsetof(CPUARMState, vfp.zregs[23]) },
{ HV_SIMD_FP_REG_Q24, offsetof(CPUARMState, vfp.zregs[24]) },
{ HV_SIMD_FP_REG_Q25, offsetof(CPUARMState, vfp.zregs[25]) },
{ HV_SIMD_FP_REG_Q26, offsetof(CPUARMState, vfp.zregs[26]) },
{ HV_SIMD_FP_REG_Q27, offsetof(CPUARMState, vfp.zregs[27]) },
{ HV_SIMD_FP_REG_Q28, offsetof(CPUARMState, vfp.zregs[28]) },
{ HV_SIMD_FP_REG_Q29, offsetof(CPUARMState, vfp.zregs[29]) },
{ HV_SIMD_FP_REG_Q30, offsetof(CPUARMState, vfp.zregs[30]) },
{ HV_SIMD_FP_REG_Q31, offsetof(CPUARMState, vfp.zregs[31]) },
};
struct hvf_sreg_match {
int reg;
uint32_t key;
uint32_t cp_idx;
};
static struct hvf_sreg_match hvf_sreg_match[] = {
{ HV_SYS_REG_DBGBVR0_EL1, HVF_SYSREG(0, 0, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR0_EL1, HVF_SYSREG(0, 0, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR0_EL1, HVF_SYSREG(0, 0, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR0_EL1, HVF_SYSREG(0, 0, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR1_EL1, HVF_SYSREG(0, 1, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR1_EL1, HVF_SYSREG(0, 1, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR1_EL1, HVF_SYSREG(0, 1, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR1_EL1, HVF_SYSREG(0, 1, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR2_EL1, HVF_SYSREG(0, 2, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR2_EL1, HVF_SYSREG(0, 2, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR2_EL1, HVF_SYSREG(0, 2, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR2_EL1, HVF_SYSREG(0, 2, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR3_EL1, HVF_SYSREG(0, 3, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR3_EL1, HVF_SYSREG(0, 3, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR3_EL1, HVF_SYSREG(0, 3, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR3_EL1, HVF_SYSREG(0, 3, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR4_EL1, HVF_SYSREG(0, 4, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR4_EL1, HVF_SYSREG(0, 4, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR4_EL1, HVF_SYSREG(0, 4, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR4_EL1, HVF_SYSREG(0, 4, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR5_EL1, HVF_SYSREG(0, 5, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR5_EL1, HVF_SYSREG(0, 5, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR5_EL1, HVF_SYSREG(0, 5, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR5_EL1, HVF_SYSREG(0, 5, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR6_EL1, HVF_SYSREG(0, 6, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR6_EL1, HVF_SYSREG(0, 6, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR6_EL1, HVF_SYSREG(0, 6, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR6_EL1, HVF_SYSREG(0, 6, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR7_EL1, HVF_SYSREG(0, 7, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR7_EL1, HVF_SYSREG(0, 7, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR7_EL1, HVF_SYSREG(0, 7, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR7_EL1, HVF_SYSREG(0, 7, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR8_EL1, HVF_SYSREG(0, 8, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR8_EL1, HVF_SYSREG(0, 8, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR8_EL1, HVF_SYSREG(0, 8, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR8_EL1, HVF_SYSREG(0, 8, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR9_EL1, HVF_SYSREG(0, 9, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR9_EL1, HVF_SYSREG(0, 9, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR9_EL1, HVF_SYSREG(0, 9, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR9_EL1, HVF_SYSREG(0, 9, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR10_EL1, HVF_SYSREG(0, 10, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR10_EL1, HVF_SYSREG(0, 10, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR10_EL1, HVF_SYSREG(0, 10, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR10_EL1, HVF_SYSREG(0, 10, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR11_EL1, HVF_SYSREG(0, 11, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR11_EL1, HVF_SYSREG(0, 11, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR11_EL1, HVF_SYSREG(0, 11, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR11_EL1, HVF_SYSREG(0, 11, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR12_EL1, HVF_SYSREG(0, 12, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR12_EL1, HVF_SYSREG(0, 12, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR12_EL1, HVF_SYSREG(0, 12, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR12_EL1, HVF_SYSREG(0, 12, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR13_EL1, HVF_SYSREG(0, 13, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR13_EL1, HVF_SYSREG(0, 13, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR13_EL1, HVF_SYSREG(0, 13, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR13_EL1, HVF_SYSREG(0, 13, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR14_EL1, HVF_SYSREG(0, 14, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR14_EL1, HVF_SYSREG(0, 14, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR14_EL1, HVF_SYSREG(0, 14, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR14_EL1, HVF_SYSREG(0, 14, 14, 0, 7) },
{ HV_SYS_REG_DBGBVR15_EL1, HVF_SYSREG(0, 15, 14, 0, 4) },
{ HV_SYS_REG_DBGBCR15_EL1, HVF_SYSREG(0, 15, 14, 0, 5) },
{ HV_SYS_REG_DBGWVR15_EL1, HVF_SYSREG(0, 15, 14, 0, 6) },
{ HV_SYS_REG_DBGWCR15_EL1, HVF_SYSREG(0, 15, 14, 0, 7) },
#ifdef SYNC_NO_RAW_REGS
/*
* The registers below are manually synced on init because they are
* marked as NO_RAW. We still list them to make number space sync easier.
*/
{ HV_SYS_REG_MDCCINT_EL1, HVF_SYSREG(0, 2, 2, 0, 0) },
{ HV_SYS_REG_MIDR_EL1, HVF_SYSREG(0, 0, 3, 0, 0) },
{ HV_SYS_REG_MPIDR_EL1, HVF_SYSREG(0, 0, 3, 0, 5) },
{ HV_SYS_REG_ID_AA64PFR0_EL1, HVF_SYSREG(0, 4, 3, 0, 0) },
#endif
{ HV_SYS_REG_ID_AA64PFR1_EL1, HVF_SYSREG(0, 4, 3, 0, 2) },
{ HV_SYS_REG_ID_AA64DFR0_EL1, HVF_SYSREG(0, 5, 3, 0, 0) },
{ HV_SYS_REG_ID_AA64DFR1_EL1, HVF_SYSREG(0, 5, 3, 0, 1) },
{ HV_SYS_REG_ID_AA64ISAR0_EL1, HVF_SYSREG(0, 6, 3, 0, 0) },
{ HV_SYS_REG_ID_AA64ISAR1_EL1, HVF_SYSREG(0, 6, 3, 0, 1) },
#ifdef SYNC_NO_MMFR0
/* We keep the hardware MMFR0 around. HW limits are there anyway */
{ HV_SYS_REG_ID_AA64MMFR0_EL1, HVF_SYSREG(0, 7, 3, 0, 0) },
#endif
{ HV_SYS_REG_ID_AA64MMFR1_EL1, HVF_SYSREG(0, 7, 3, 0, 1) },
{ HV_SYS_REG_ID_AA64MMFR2_EL1, HVF_SYSREG(0, 7, 3, 0, 2) },
{ HV_SYS_REG_MDSCR_EL1, HVF_SYSREG(0, 2, 2, 0, 2) },
{ HV_SYS_REG_SCTLR_EL1, HVF_SYSREG(1, 0, 3, 0, 0) },
{ HV_SYS_REG_CPACR_EL1, HVF_SYSREG(1, 0, 3, 0, 2) },
{ HV_SYS_REG_TTBR0_EL1, HVF_SYSREG(2, 0, 3, 0, 0) },
{ HV_SYS_REG_TTBR1_EL1, HVF_SYSREG(2, 0, 3, 0, 1) },
{ HV_SYS_REG_TCR_EL1, HVF_SYSREG(2, 0, 3, 0, 2) },
{ HV_SYS_REG_APIAKEYLO_EL1, HVF_SYSREG(2, 1, 3, 0, 0) },
{ HV_SYS_REG_APIAKEYHI_EL1, HVF_SYSREG(2, 1, 3, 0, 1) },
{ HV_SYS_REG_APIBKEYLO_EL1, HVF_SYSREG(2, 1, 3, 0, 2) },
{ HV_SYS_REG_APIBKEYHI_EL1, HVF_SYSREG(2, 1, 3, 0, 3) },
{ HV_SYS_REG_APDAKEYLO_EL1, HVF_SYSREG(2, 2, 3, 0, 0) },
{ HV_SYS_REG_APDAKEYHI_EL1, HVF_SYSREG(2, 2, 3, 0, 1) },
{ HV_SYS_REG_APDBKEYLO_EL1, HVF_SYSREG(2, 2, 3, 0, 2) },
{ HV_SYS_REG_APDBKEYHI_EL1, HVF_SYSREG(2, 2, 3, 0, 3) },
{ HV_SYS_REG_APGAKEYLO_EL1, HVF_SYSREG(2, 3, 3, 0, 0) },
{ HV_SYS_REG_APGAKEYHI_EL1, HVF_SYSREG(2, 3, 3, 0, 1) },
{ HV_SYS_REG_SPSR_EL1, HVF_SYSREG(4, 0, 3, 0, 0) },
{ HV_SYS_REG_ELR_EL1, HVF_SYSREG(4, 0, 3, 0, 1) },
{ HV_SYS_REG_SP_EL0, HVF_SYSREG(4, 1, 3, 0, 0) },
{ HV_SYS_REG_AFSR0_EL1, HVF_SYSREG(5, 1, 3, 0, 0) },
{ HV_SYS_REG_AFSR1_EL1, HVF_SYSREG(5, 1, 3, 0, 1) },
{ HV_SYS_REG_ESR_EL1, HVF_SYSREG(5, 2, 3, 0, 0) },
{ HV_SYS_REG_FAR_EL1, HVF_SYSREG(6, 0, 3, 0, 0) },
{ HV_SYS_REG_PAR_EL1, HVF_SYSREG(7, 4, 3, 0, 0) },
{ HV_SYS_REG_MAIR_EL1, HVF_SYSREG(10, 2, 3, 0, 0) },
{ HV_SYS_REG_AMAIR_EL1, HVF_SYSREG(10, 3, 3, 0, 0) },
{ HV_SYS_REG_VBAR_EL1, HVF_SYSREG(12, 0, 3, 0, 0) },
{ HV_SYS_REG_CONTEXTIDR_EL1, HVF_SYSREG(13, 0, 3, 0, 1) },
{ HV_SYS_REG_TPIDR_EL1, HVF_SYSREG(13, 0, 3, 0, 4) },
{ HV_SYS_REG_CNTKCTL_EL1, HVF_SYSREG(14, 1, 3, 0, 0) },
{ HV_SYS_REG_CSSELR_EL1, HVF_SYSREG(0, 0, 3, 2, 0) },
{ HV_SYS_REG_TPIDR_EL0, HVF_SYSREG(13, 0, 3, 3, 2) },
{ HV_SYS_REG_TPIDRRO_EL0, HVF_SYSREG(13, 0, 3, 3, 3) },
{ HV_SYS_REG_CNTV_CTL_EL0, HVF_SYSREG(14, 3, 3, 3, 1) },
{ HV_SYS_REG_CNTV_CVAL_EL0, HVF_SYSREG(14, 3, 3, 3, 2) },
{ HV_SYS_REG_SP_EL1, HVF_SYSREG(4, 1, 3, 4, 0) },
};
int hvf_get_registers(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
hv_return_t ret;
uint64_t val;
hv_simd_fp_uchar16_t fpval;
int i;
for (i = 0; i < ARRAY_SIZE(hvf_reg_match); i++) {
ret = hv_vcpu_get_reg(cpu->accel->fd, hvf_reg_match[i].reg, &val);
*(uint64_t *)((void *)env + hvf_reg_match[i].offset) = val;
assert_hvf_ok(ret);
}
for (i = 0; i < ARRAY_SIZE(hvf_fpreg_match); i++) {
ret = hv_vcpu_get_simd_fp_reg(cpu->accel->fd, hvf_fpreg_match[i].reg,
&fpval);
memcpy((void *)env + hvf_fpreg_match[i].offset, &fpval, sizeof(fpval));
assert_hvf_ok(ret);
}
val = 0;
ret = hv_vcpu_get_reg(cpu->accel->fd, HV_REG_FPCR, &val);
assert_hvf_ok(ret);
vfp_set_fpcr(env, val);
val = 0;
ret = hv_vcpu_get_reg(cpu->accel->fd, HV_REG_FPSR, &val);
assert_hvf_ok(ret);
vfp_set_fpsr(env, val);
ret = hv_vcpu_get_reg(cpu->accel->fd, HV_REG_CPSR, &val);
assert_hvf_ok(ret);
pstate_write(env, val);
for (i = 0; i < ARRAY_SIZE(hvf_sreg_match); i++) {
if (hvf_sreg_match[i].cp_idx == -1) {
continue;
}
if (cpu->accel->guest_debug_enabled) {
/* Handle debug registers */
switch (hvf_sreg_match[i].reg) {
case HV_SYS_REG_DBGBVR0_EL1:
case HV_SYS_REG_DBGBCR0_EL1:
case HV_SYS_REG_DBGWVR0_EL1:
case HV_SYS_REG_DBGWCR0_EL1:
case HV_SYS_REG_DBGBVR1_EL1:
case HV_SYS_REG_DBGBCR1_EL1:
case HV_SYS_REG_DBGWVR1_EL1:
case HV_SYS_REG_DBGWCR1_EL1:
case HV_SYS_REG_DBGBVR2_EL1:
case HV_SYS_REG_DBGBCR2_EL1:
case HV_SYS_REG_DBGWVR2_EL1:
case HV_SYS_REG_DBGWCR2_EL1:
case HV_SYS_REG_DBGBVR3_EL1:
case HV_SYS_REG_DBGBCR3_EL1:
case HV_SYS_REG_DBGWVR3_EL1:
case HV_SYS_REG_DBGWCR3_EL1:
case HV_SYS_REG_DBGBVR4_EL1:
case HV_SYS_REG_DBGBCR4_EL1:
case HV_SYS_REG_DBGWVR4_EL1:
case HV_SYS_REG_DBGWCR4_EL1:
case HV_SYS_REG_DBGBVR5_EL1:
case HV_SYS_REG_DBGBCR5_EL1:
case HV_SYS_REG_DBGWVR5_EL1:
case HV_SYS_REG_DBGWCR5_EL1:
case HV_SYS_REG_DBGBVR6_EL1:
case HV_SYS_REG_DBGBCR6_EL1:
case HV_SYS_REG_DBGWVR6_EL1:
case HV_SYS_REG_DBGWCR6_EL1:
case HV_SYS_REG_DBGBVR7_EL1:
case HV_SYS_REG_DBGBCR7_EL1:
case HV_SYS_REG_DBGWVR7_EL1:
case HV_SYS_REG_DBGWCR7_EL1:
case HV_SYS_REG_DBGBVR8_EL1:
case HV_SYS_REG_DBGBCR8_EL1:
case HV_SYS_REG_DBGWVR8_EL1:
case HV_SYS_REG_DBGWCR8_EL1:
case HV_SYS_REG_DBGBVR9_EL1:
case HV_SYS_REG_DBGBCR9_EL1:
case HV_SYS_REG_DBGWVR9_EL1:
case HV_SYS_REG_DBGWCR9_EL1:
case HV_SYS_REG_DBGBVR10_EL1:
case HV_SYS_REG_DBGBCR10_EL1:
case HV_SYS_REG_DBGWVR10_EL1:
case HV_SYS_REG_DBGWCR10_EL1:
case HV_SYS_REG_DBGBVR11_EL1:
case HV_SYS_REG_DBGBCR11_EL1:
case HV_SYS_REG_DBGWVR11_EL1:
case HV_SYS_REG_DBGWCR11_EL1:
case HV_SYS_REG_DBGBVR12_EL1:
case HV_SYS_REG_DBGBCR12_EL1:
case HV_SYS_REG_DBGWVR12_EL1:
case HV_SYS_REG_DBGWCR12_EL1:
case HV_SYS_REG_DBGBVR13_EL1:
case HV_SYS_REG_DBGBCR13_EL1:
case HV_SYS_REG_DBGWVR13_EL1:
case HV_SYS_REG_DBGWCR13_EL1:
case HV_SYS_REG_DBGBVR14_EL1:
case HV_SYS_REG_DBGBCR14_EL1:
case HV_SYS_REG_DBGWVR14_EL1:
case HV_SYS_REG_DBGWCR14_EL1:
case HV_SYS_REG_DBGBVR15_EL1:
case HV_SYS_REG_DBGBCR15_EL1:
case HV_SYS_REG_DBGWVR15_EL1:
case HV_SYS_REG_DBGWCR15_EL1: {
/*
* If the guest is being debugged, the vCPU's debug registers
* are holding the gdbstub's view of the registers (set in
* hvf_arch_update_guest_debug()).
* Since the environment is used to store only the guest's view
* of the registers, don't update it with the values from the
* vCPU but simply keep the values from the previous
* environment.
*/
const ARMCPRegInfo *ri;
ri = get_arm_cp_reginfo(arm_cpu->cp_regs, hvf_sreg_match[i].key);
val = read_raw_cp_reg(env, ri);
arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx] = val;
continue;
}
}
}
ret = hv_vcpu_get_sys_reg(cpu->accel->fd, hvf_sreg_match[i].reg, &val);
assert_hvf_ok(ret);
arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx] = val;
}
assert(write_list_to_cpustate(arm_cpu));
aarch64_restore_sp(env, arm_current_el(env));
return 0;
}
int hvf_put_registers(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
hv_return_t ret;
uint64_t val;
hv_simd_fp_uchar16_t fpval;
int i;
for (i = 0; i < ARRAY_SIZE(hvf_reg_match); i++) {
val = *(uint64_t *)((void *)env + hvf_reg_match[i].offset);
ret = hv_vcpu_set_reg(cpu->accel->fd, hvf_reg_match[i].reg, val);
assert_hvf_ok(ret);
}
for (i = 0; i < ARRAY_SIZE(hvf_fpreg_match); i++) {
memcpy(&fpval, (void *)env + hvf_fpreg_match[i].offset, sizeof(fpval));
ret = hv_vcpu_set_simd_fp_reg(cpu->accel->fd, hvf_fpreg_match[i].reg,
fpval);
assert_hvf_ok(ret);
}
ret = hv_vcpu_set_reg(cpu->accel->fd, HV_REG_FPCR, vfp_get_fpcr(env));
assert_hvf_ok(ret);
ret = hv_vcpu_set_reg(cpu->accel->fd, HV_REG_FPSR, vfp_get_fpsr(env));
assert_hvf_ok(ret);
ret = hv_vcpu_set_reg(cpu->accel->fd, HV_REG_CPSR, pstate_read(env));
assert_hvf_ok(ret);
aarch64_save_sp(env, arm_current_el(env));
assert(write_cpustate_to_list(arm_cpu, false));
for (i = 0; i < ARRAY_SIZE(hvf_sreg_match); i++) {
if (hvf_sreg_match[i].cp_idx == -1) {
continue;
}
if (cpu->accel->guest_debug_enabled) {
/* Handle debug registers */
switch (hvf_sreg_match[i].reg) {
case HV_SYS_REG_DBGBVR0_EL1:
case HV_SYS_REG_DBGBCR0_EL1:
case HV_SYS_REG_DBGWVR0_EL1:
case HV_SYS_REG_DBGWCR0_EL1:
case HV_SYS_REG_DBGBVR1_EL1:
case HV_SYS_REG_DBGBCR1_EL1:
case HV_SYS_REG_DBGWVR1_EL1:
case HV_SYS_REG_DBGWCR1_EL1:
case HV_SYS_REG_DBGBVR2_EL1:
case HV_SYS_REG_DBGBCR2_EL1:
case HV_SYS_REG_DBGWVR2_EL1:
case HV_SYS_REG_DBGWCR2_EL1:
case HV_SYS_REG_DBGBVR3_EL1:
case HV_SYS_REG_DBGBCR3_EL1:
case HV_SYS_REG_DBGWVR3_EL1:
case HV_SYS_REG_DBGWCR3_EL1:
case HV_SYS_REG_DBGBVR4_EL1:
case HV_SYS_REG_DBGBCR4_EL1:
case HV_SYS_REG_DBGWVR4_EL1:
case HV_SYS_REG_DBGWCR4_EL1:
case HV_SYS_REG_DBGBVR5_EL1:
case HV_SYS_REG_DBGBCR5_EL1:
case HV_SYS_REG_DBGWVR5_EL1:
case HV_SYS_REG_DBGWCR5_EL1:
case HV_SYS_REG_DBGBVR6_EL1:
case HV_SYS_REG_DBGBCR6_EL1:
case HV_SYS_REG_DBGWVR6_EL1:
case HV_SYS_REG_DBGWCR6_EL1:
case HV_SYS_REG_DBGBVR7_EL1:
case HV_SYS_REG_DBGBCR7_EL1:
case HV_SYS_REG_DBGWVR7_EL1:
case HV_SYS_REG_DBGWCR7_EL1:
case HV_SYS_REG_DBGBVR8_EL1:
case HV_SYS_REG_DBGBCR8_EL1:
case HV_SYS_REG_DBGWVR8_EL1:
case HV_SYS_REG_DBGWCR8_EL1:
case HV_SYS_REG_DBGBVR9_EL1:
case HV_SYS_REG_DBGBCR9_EL1:
case HV_SYS_REG_DBGWVR9_EL1:
case HV_SYS_REG_DBGWCR9_EL1:
case HV_SYS_REG_DBGBVR10_EL1:
case HV_SYS_REG_DBGBCR10_EL1:
case HV_SYS_REG_DBGWVR10_EL1:
case HV_SYS_REG_DBGWCR10_EL1:
case HV_SYS_REG_DBGBVR11_EL1:
case HV_SYS_REG_DBGBCR11_EL1:
case HV_SYS_REG_DBGWVR11_EL1:
case HV_SYS_REG_DBGWCR11_EL1:
case HV_SYS_REG_DBGBVR12_EL1:
case HV_SYS_REG_DBGBCR12_EL1:
case HV_SYS_REG_DBGWVR12_EL1:
case HV_SYS_REG_DBGWCR12_EL1:
case HV_SYS_REG_DBGBVR13_EL1:
case HV_SYS_REG_DBGBCR13_EL1:
case HV_SYS_REG_DBGWVR13_EL1:
case HV_SYS_REG_DBGWCR13_EL1:
case HV_SYS_REG_DBGBVR14_EL1:
case HV_SYS_REG_DBGBCR14_EL1:
case HV_SYS_REG_DBGWVR14_EL1:
case HV_SYS_REG_DBGWCR14_EL1:
case HV_SYS_REG_DBGBVR15_EL1:
case HV_SYS_REG_DBGBCR15_EL1:
case HV_SYS_REG_DBGWVR15_EL1:
case HV_SYS_REG_DBGWCR15_EL1:
/*
* If the guest is being debugged, the vCPU's debug registers
* are already holding the gdbstub's view of the registers (set
* in hvf_arch_update_guest_debug()).
*/
continue;
}
}
val = arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx];
ret = hv_vcpu_set_sys_reg(cpu->accel->fd, hvf_sreg_match[i].reg, val);
assert_hvf_ok(ret);
}
ret = hv_vcpu_set_vtimer_offset(cpu->accel->fd, hvf_state->vtimer_offset);
assert_hvf_ok(ret);
return 0;
}
static void flush_cpu_state(CPUState *cpu)
{
if (cpu->vcpu_dirty) {
hvf_put_registers(cpu);
cpu->vcpu_dirty = false;
}
}
static void hvf_set_reg(CPUState *cpu, int rt, uint64_t val)
{
hv_return_t r;
flush_cpu_state(cpu);
if (rt < 31) {
r = hv_vcpu_set_reg(cpu->accel->fd, HV_REG_X0 + rt, val);
assert_hvf_ok(r);
}
}
static uint64_t hvf_get_reg(CPUState *cpu, int rt)
{
uint64_t val = 0;
hv_return_t r;
flush_cpu_state(cpu);
if (rt < 31) {
r = hv_vcpu_get_reg(cpu->accel->fd, HV_REG_X0 + rt, &val);
assert_hvf_ok(r);
}
return val;
}
static bool hvf_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
{
ARMISARegisters host_isar = {};
const struct isar_regs {
int reg;
uint64_t *val;
} regs[] = {
{ HV_SYS_REG_ID_AA64PFR0_EL1, &host_isar.id_aa64pfr0 },
{ HV_SYS_REG_ID_AA64PFR1_EL1, &host_isar.id_aa64pfr1 },
{ HV_SYS_REG_ID_AA64DFR0_EL1, &host_isar.id_aa64dfr0 },
{ HV_SYS_REG_ID_AA64DFR1_EL1, &host_isar.id_aa64dfr1 },
{ HV_SYS_REG_ID_AA64ISAR0_EL1, &host_isar.id_aa64isar0 },
{ HV_SYS_REG_ID_AA64ISAR1_EL1, &host_isar.id_aa64isar1 },
/* Add ID_AA64ISAR2_EL1 here when HVF supports it */
{ HV_SYS_REG_ID_AA64MMFR0_EL1, &host_isar.id_aa64mmfr0 },
{ HV_SYS_REG_ID_AA64MMFR1_EL1, &host_isar.id_aa64mmfr1 },
{ HV_SYS_REG_ID_AA64MMFR2_EL1, &host_isar.id_aa64mmfr2 },
};
hv_vcpu_t fd;
hv_return_t r = HV_SUCCESS;
hv_vcpu_exit_t *exit;
int i;
ahcf->dtb_compatible = "arm,arm-v8";
ahcf->features = (1ULL << ARM_FEATURE_V8) |
(1ULL << ARM_FEATURE_NEON) |
(1ULL << ARM_FEATURE_AARCH64) |
(1ULL << ARM_FEATURE_PMU) |
(1ULL << ARM_FEATURE_GENERIC_TIMER);
/* We set up a small vcpu to extract host registers */
if (hv_vcpu_create(&fd, &exit, NULL) != HV_SUCCESS) {
return false;
}
for (i = 0; i < ARRAY_SIZE(regs); i++) {
r |= hv_vcpu_get_sys_reg(fd, regs[i].reg, regs[i].val);
}
r |= hv_vcpu_get_sys_reg(fd, HV_SYS_REG_MIDR_EL1, &ahcf->midr);
r |= hv_vcpu_destroy(fd);
ahcf->isar = host_isar;
/*
* A scratch vCPU returns SCTLR 0, so let's fill our default with the M1
* boot SCTLR from https://github.com/AsahiLinux/m1n1/issues/97
*/
ahcf->reset_sctlr = 0x30100180;
/*
* SPAN is disabled by default when SCTLR.SPAN=1. To improve compatibility,
* let's disable it on boot and then allow guest software to turn it on by
* setting it to 0.
*/
ahcf->reset_sctlr |= 0x00800000;
/* Make sure we don't advertise AArch32 support for EL0/EL1 */
if ((host_isar.id_aa64pfr0 & 0xff) != 0x11) {
return false;
}
return r == HV_SUCCESS;
}
void hvf_arm_set_cpu_features_from_host(ARMCPU *cpu)
{
if (!arm_host_cpu_features.dtb_compatible) {
if (!hvf_enabled() ||
!hvf_arm_get_host_cpu_features(&arm_host_cpu_features)) {
/*
* We can't report this error yet, so flag that we need to
* in arm_cpu_realizefn().
*/
cpu->host_cpu_probe_failed = true;
return;
}
}
cpu->dtb_compatible = arm_host_cpu_features.dtb_compatible;
cpu->isar = arm_host_cpu_features.isar;
cpu->env.features = arm_host_cpu_features.features;
cpu->midr = arm_host_cpu_features.midr;
cpu->reset_sctlr = arm_host_cpu_features.reset_sctlr;
}
void hvf_arch_vcpu_destroy(CPUState *cpu)
{
}
int hvf_arch_init_vcpu(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
uint32_t sregs_match_len = ARRAY_SIZE(hvf_sreg_match);
uint32_t sregs_cnt = 0;
uint64_t pfr;
hv_return_t ret;
int i;
env->aarch64 = true;
asm volatile("mrs %0, cntfrq_el0" : "=r"(arm_cpu->gt_cntfrq_hz));
/* Allocate enough space for our sysreg sync */
arm_cpu->cpreg_indexes = g_renew(uint64_t, arm_cpu->cpreg_indexes,
sregs_match_len);
arm_cpu->cpreg_values = g_renew(uint64_t, arm_cpu->cpreg_values,
sregs_match_len);
arm_cpu->cpreg_vmstate_indexes = g_renew(uint64_t,
arm_cpu->cpreg_vmstate_indexes,
sregs_match_len);
arm_cpu->cpreg_vmstate_values = g_renew(uint64_t,
arm_cpu->cpreg_vmstate_values,
sregs_match_len);
memset(arm_cpu->cpreg_values, 0, sregs_match_len * sizeof(uint64_t));
/* Populate cp list for all known sysregs */
for (i = 0; i < sregs_match_len; i++) {
const ARMCPRegInfo *ri;
uint32_t key = hvf_sreg_match[i].key;
ri = get_arm_cp_reginfo(arm_cpu->cp_regs, key);
if (ri) {
assert(!(ri->type & ARM_CP_NO_RAW));
hvf_sreg_match[i].cp_idx = sregs_cnt;
arm_cpu->cpreg_indexes[sregs_cnt++] = cpreg_to_kvm_id(key);
} else {
hvf_sreg_match[i].cp_idx = -1;
}
}
arm_cpu->cpreg_array_len = sregs_cnt;
arm_cpu->cpreg_vmstate_array_len = sregs_cnt;
assert(write_cpustate_to_list(arm_cpu, false));
/* Set CP_NO_RAW system registers on init */
ret = hv_vcpu_set_sys_reg(cpu->accel->fd, HV_SYS_REG_MIDR_EL1,
arm_cpu->midr);
assert_hvf_ok(ret);
ret = hv_vcpu_set_sys_reg(cpu->accel->fd, HV_SYS_REG_MPIDR_EL1,
arm_cpu->mp_affinity);
assert_hvf_ok(ret);
ret = hv_vcpu_get_sys_reg(cpu->accel->fd, HV_SYS_REG_ID_AA64PFR0_EL1, &pfr);
assert_hvf_ok(ret);
pfr |= env->gicv3state ? (1 << 24) : 0;
ret = hv_vcpu_set_sys_reg(cpu->accel->fd, HV_SYS_REG_ID_AA64PFR0_EL1, pfr);
assert_hvf_ok(ret);
/* We're limited to underlying hardware caps, override internal versions */
ret = hv_vcpu_get_sys_reg(cpu->accel->fd, HV_SYS_REG_ID_AA64MMFR0_EL1,
&arm_cpu->isar.id_aa64mmfr0);
assert_hvf_ok(ret);
return 0;
}
void hvf_kick_vcpu_thread(CPUState *cpu)
{
cpus_kick_thread(cpu);
hv_vcpus_exit(&cpu->accel->fd, 1);
}
static void hvf_raise_exception(CPUState *cpu, uint32_t excp,
uint32_t syndrome)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
cpu->exception_index = excp;
env->exception.target_el = 1;
env->exception.syndrome = syndrome;
arm_cpu_do_interrupt(cpu);
}
static void hvf_psci_cpu_off(ARMCPU *arm_cpu)
{
int32_t ret = arm_set_cpu_off(arm_cpu->mp_affinity);
assert(ret == QEMU_ARM_POWERCTL_RET_SUCCESS);
}
/*
* Handle a PSCI call.
*
* Returns 0 on success
* -1 when the PSCI call is unknown,
*/
static bool hvf_handle_psci_call(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
uint64_t param[4] = {
env->xregs[0],
env->xregs[1],
env->xregs[2],
env->xregs[3]
};
uint64_t context_id, mpidr;
bool target_aarch64 = true;
CPUState *target_cpu_state;
ARMCPU *target_cpu;
target_ulong entry;
int target_el = 1;
int32_t ret = 0;
trace_hvf_psci_call(param[0], param[1], param[2], param[3],
arm_cpu->mp_affinity);
switch (param[0]) {
case QEMU_PSCI_0_2_FN_PSCI_VERSION:
ret = QEMU_PSCI_VERSION_1_1;
break;
case QEMU_PSCI_0_2_FN_MIGRATE_INFO_TYPE:
ret = QEMU_PSCI_0_2_RET_TOS_MIGRATION_NOT_REQUIRED; /* No trusted OS */
break;
case QEMU_PSCI_0_2_FN_AFFINITY_INFO:
case QEMU_PSCI_0_2_FN64_AFFINITY_INFO:
mpidr = param[1];
switch (param[2]) {
case 0:
target_cpu_state = arm_get_cpu_by_id(mpidr);
if (!target_cpu_state) {
ret = QEMU_PSCI_RET_INVALID_PARAMS;
break;
}
target_cpu = ARM_CPU(target_cpu_state);
ret = target_cpu->power_state;
break;
default:
/* Everything above affinity level 0 is always on. */
ret = 0;
}
break;
case QEMU_PSCI_0_2_FN_SYSTEM_RESET:
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
/*
* QEMU reset and shutdown are async requests, but PSCI
* mandates that we never return from the reset/shutdown
* call, so power the CPU off now so it doesn't execute
* anything further.
*/
hvf_psci_cpu_off(arm_cpu);
break;
case QEMU_PSCI_0_2_FN_SYSTEM_OFF:
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
hvf_psci_cpu_off(arm_cpu);
break;
case QEMU_PSCI_0_1_FN_CPU_ON:
case QEMU_PSCI_0_2_FN_CPU_ON:
case QEMU_PSCI_0_2_FN64_CPU_ON:
mpidr = param[1];
entry = param[2];
context_id = param[3];
ret = arm_set_cpu_on(mpidr, entry, context_id,
target_el, target_aarch64);
break;
case QEMU_PSCI_0_1_FN_CPU_OFF:
case QEMU_PSCI_0_2_FN_CPU_OFF:
hvf_psci_cpu_off(arm_cpu);
break;
case QEMU_PSCI_0_1_FN_CPU_SUSPEND:
case QEMU_PSCI_0_2_FN_CPU_SUSPEND:
case QEMU_PSCI_0_2_FN64_CPU_SUSPEND:
/* Affinity levels are not supported in QEMU */
if (param[1] & 0xfffe0000) {
ret = QEMU_PSCI_RET_INVALID_PARAMS;
break;
}
/* Powerdown is not supported, we always go into WFI */
env->xregs[0] = 0;
hvf_wfi(cpu);
break;
case QEMU_PSCI_0_1_FN_MIGRATE:
case QEMU_PSCI_0_2_FN_MIGRATE:
ret = QEMU_PSCI_RET_NOT_SUPPORTED;
break;
case QEMU_PSCI_1_0_FN_PSCI_FEATURES:
switch (param[1]) {
case QEMU_PSCI_0_2_FN_PSCI_VERSION:
case QEMU_PSCI_0_2_FN_MIGRATE_INFO_TYPE:
case QEMU_PSCI_0_2_FN_AFFINITY_INFO:
case QEMU_PSCI_0_2_FN64_AFFINITY_INFO:
case QEMU_PSCI_0_2_FN_SYSTEM_RESET:
case QEMU_PSCI_0_2_FN_SYSTEM_OFF:
case QEMU_PSCI_0_1_FN_CPU_ON:
case QEMU_PSCI_0_2_FN_CPU_ON:
case QEMU_PSCI_0_2_FN64_CPU_ON:
case QEMU_PSCI_0_1_FN_CPU_OFF:
case QEMU_PSCI_0_2_FN_CPU_OFF:
case QEMU_PSCI_0_1_FN_CPU_SUSPEND:
case QEMU_PSCI_0_2_FN_CPU_SUSPEND:
case QEMU_PSCI_0_2_FN64_CPU_SUSPEND:
case QEMU_PSCI_1_0_FN_PSCI_FEATURES:
ret = 0;
break;
case QEMU_PSCI_0_1_FN_MIGRATE:
case QEMU_PSCI_0_2_FN_MIGRATE:
default:
ret = QEMU_PSCI_RET_NOT_SUPPORTED;
}
break;
default:
return false;
}
env->xregs[0] = ret;
return true;
}
static bool is_id_sysreg(uint32_t reg)
{
return SYSREG_OP0(reg) == 3 &&
SYSREG_OP1(reg) == 0 &&
SYSREG_CRN(reg) == 0 &&
SYSREG_CRM(reg) >= 1 &&
SYSREG_CRM(reg) < 8;
}
static uint32_t hvf_reg2cp_reg(uint32_t reg)
{
return ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP,
(reg >> SYSREG_CRN_SHIFT) & SYSREG_CRN_MASK,
(reg >> SYSREG_CRM_SHIFT) & SYSREG_CRM_MASK,
(reg >> SYSREG_OP0_SHIFT) & SYSREG_OP0_MASK,
(reg >> SYSREG_OP1_SHIFT) & SYSREG_OP1_MASK,
(reg >> SYSREG_OP2_SHIFT) & SYSREG_OP2_MASK);
}
static bool hvf_sysreg_read_cp(CPUState *cpu, uint32_t reg, uint64_t *val)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
const ARMCPRegInfo *ri;
ri = get_arm_cp_reginfo(arm_cpu->cp_regs, hvf_reg2cp_reg(reg));
if (ri) {
if (ri->accessfn) {
if (ri->accessfn(env, ri, true) != CP_ACCESS_OK) {
return false;
}
}
if (ri->type & ARM_CP_CONST) {
*val = ri->resetvalue;
} else if (ri->readfn) {
*val = ri->readfn(env, ri);
} else {
*val = CPREG_FIELD64(env, ri);
}
trace_hvf_vgic_read(ri->name, *val);
return true;
}
return false;
}
static int hvf_sysreg_read(CPUState *cpu, uint32_t reg, uint32_t rt)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
uint64_t val = 0;
switch (reg) {
case SYSREG_CNTPCT_EL0:
val = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) /
gt_cntfrq_period_ns(arm_cpu);
break;
case SYSREG_PMCR_EL0:
val = env->cp15.c9_pmcr;
break;
case SYSREG_PMCCNTR_EL0:
pmu_op_start(env);
val = env->cp15.c15_ccnt;
pmu_op_finish(env);
break;
case SYSREG_PMCNTENCLR_EL0:
val = env->cp15.c9_pmcnten;
break;
case SYSREG_PMOVSCLR_EL0:
val = env->cp15.c9_pmovsr;
break;
case SYSREG_PMSELR_EL0:
val = env->cp15.c9_pmselr;
break;
case SYSREG_PMINTENCLR_EL1:
val = env->cp15.c9_pminten;
break;
case SYSREG_PMCCFILTR_EL0:
val = env->cp15.pmccfiltr_el0;
break;
case SYSREG_PMCNTENSET_EL0:
val = env->cp15.c9_pmcnten;
break;
case SYSREG_PMUSERENR_EL0:
val = env->cp15.c9_pmuserenr;
break;
case SYSREG_PMCEID0_EL0:
case SYSREG_PMCEID1_EL0:
/* We can't really count anything yet, declare all events invalid */
val = 0;
break;
case SYSREG_OSLSR_EL1:
val = env->cp15.oslsr_el1;
break;
case SYSREG_OSDLR_EL1:
/* Dummy register */
break;
case SYSREG_ICC_AP0R0_EL1:
case SYSREG_ICC_AP0R1_EL1:
case SYSREG_ICC_AP0R2_EL1:
case SYSREG_ICC_AP0R3_EL1:
case SYSREG_ICC_AP1R0_EL1:
case SYSREG_ICC_AP1R1_EL1:
case SYSREG_ICC_AP1R2_EL1:
case SYSREG_ICC_AP1R3_EL1:
case SYSREG_ICC_ASGI1R_EL1:
case SYSREG_ICC_BPR0_EL1:
case SYSREG_ICC_BPR1_EL1:
case SYSREG_ICC_DIR_EL1:
case SYSREG_ICC_EOIR0_EL1:
case SYSREG_ICC_EOIR1_EL1:
case SYSREG_ICC_HPPIR0_EL1:
case SYSREG_ICC_HPPIR1_EL1:
case SYSREG_ICC_IAR0_EL1:
case SYSREG_ICC_IAR1_EL1:
case SYSREG_ICC_IGRPEN0_EL1:
case SYSREG_ICC_IGRPEN1_EL1:
case SYSREG_ICC_PMR_EL1:
case SYSREG_ICC_SGI0R_EL1:
case SYSREG_ICC_SGI1R_EL1:
case SYSREG_ICC_SRE_EL1:
case SYSREG_ICC_CTLR_EL1:
/* Call the TCG sysreg handler. This is only safe for GICv3 regs. */
if (!hvf_sysreg_read_cp(cpu, reg, &val)) {
hvf_raise_exception(cpu, EXCP_UDEF, syn_uncategorized());
}
break;
case SYSREG_DBGBVR0_EL1:
case SYSREG_DBGBVR1_EL1:
case SYSREG_DBGBVR2_EL1:
case SYSREG_DBGBVR3_EL1:
case SYSREG_DBGBVR4_EL1:
case SYSREG_DBGBVR5_EL1:
case SYSREG_DBGBVR6_EL1:
case SYSREG_DBGBVR7_EL1:
case SYSREG_DBGBVR8_EL1:
case SYSREG_DBGBVR9_EL1:
case SYSREG_DBGBVR10_EL1:
case SYSREG_DBGBVR11_EL1:
case SYSREG_DBGBVR12_EL1:
case SYSREG_DBGBVR13_EL1:
case SYSREG_DBGBVR14_EL1:
case SYSREG_DBGBVR15_EL1:
val = env->cp15.dbgbvr[SYSREG_CRM(reg)];
break;
case SYSREG_DBGBCR0_EL1:
case SYSREG_DBGBCR1_EL1:
case SYSREG_DBGBCR2_EL1:
case SYSREG_DBGBCR3_EL1:
case SYSREG_DBGBCR4_EL1:
case SYSREG_DBGBCR5_EL1:
case SYSREG_DBGBCR6_EL1:
case SYSREG_DBGBCR7_EL1:
case SYSREG_DBGBCR8_EL1:
case SYSREG_DBGBCR9_EL1:
case SYSREG_DBGBCR10_EL1:
case SYSREG_DBGBCR11_EL1:
case SYSREG_DBGBCR12_EL1:
case SYSREG_DBGBCR13_EL1:
case SYSREG_DBGBCR14_EL1:
case SYSREG_DBGBCR15_EL1:
val = env->cp15.dbgbcr[SYSREG_CRM(reg)];
break;
case SYSREG_DBGWVR0_EL1:
case SYSREG_DBGWVR1_EL1:
case SYSREG_DBGWVR2_EL1:
case SYSREG_DBGWVR3_EL1:
case SYSREG_DBGWVR4_EL1:
case SYSREG_DBGWVR5_EL1:
case SYSREG_DBGWVR6_EL1:
case SYSREG_DBGWVR7_EL1:
case SYSREG_DBGWVR8_EL1:
case SYSREG_DBGWVR9_EL1:
case SYSREG_DBGWVR10_EL1:
case SYSREG_DBGWVR11_EL1:
case SYSREG_DBGWVR12_EL1:
case SYSREG_DBGWVR13_EL1:
case SYSREG_DBGWVR14_EL1:
case SYSREG_DBGWVR15_EL1:
val = env->cp15.dbgwvr[SYSREG_CRM(reg)];
break;
case SYSREG_DBGWCR0_EL1:
case SYSREG_DBGWCR1_EL1:
case SYSREG_DBGWCR2_EL1:
case SYSREG_DBGWCR3_EL1:
case SYSREG_DBGWCR4_EL1:
case SYSREG_DBGWCR5_EL1:
case SYSREG_DBGWCR6_EL1:
case SYSREG_DBGWCR7_EL1:
case SYSREG_DBGWCR8_EL1:
case SYSREG_DBGWCR9_EL1:
case SYSREG_DBGWCR10_EL1:
case SYSREG_DBGWCR11_EL1:
case SYSREG_DBGWCR12_EL1:
case SYSREG_DBGWCR13_EL1:
case SYSREG_DBGWCR14_EL1:
case SYSREG_DBGWCR15_EL1:
val = env->cp15.dbgwcr[SYSREG_CRM(reg)];
break;
default:
if (is_id_sysreg(reg)) {
/* ID system registers read as RES0 */
val = 0;
break;
}
cpu_synchronize_state(cpu);
trace_hvf_unhandled_sysreg_read(env->pc, reg,
SYSREG_OP0(reg),
SYSREG_OP1(reg),
SYSREG_CRN(reg),
SYSREG_CRM(reg),
SYSREG_OP2(reg));
hvf_raise_exception(cpu, EXCP_UDEF, syn_uncategorized());
return 1;
}
trace_hvf_sysreg_read(reg,
SYSREG_OP0(reg),
SYSREG_OP1(reg),
SYSREG_CRN(reg),
SYSREG_CRM(reg),
SYSREG_OP2(reg),
val);
hvf_set_reg(cpu, rt, val);
return 0;
}
static void pmu_update_irq(CPUARMState *env)
{
ARMCPU *cpu = env_archcpu(env);
qemu_set_irq(cpu->pmu_interrupt, (env->cp15.c9_pmcr & PMCRE) &&
(env->cp15.c9_pminten & env->cp15.c9_pmovsr));
}
static bool pmu_event_supported(uint16_t number)
{
return false;
}
/* Returns true if the counter (pass 31 for PMCCNTR) should count events using
* the current EL, security state, and register configuration.
*/
static bool pmu_counter_enabled(CPUARMState *env, uint8_t counter)
{
uint64_t filter;
bool enabled, filtered = true;
int el = arm_current_el(env);
enabled = (env->cp15.c9_pmcr & PMCRE) &&
(env->cp15.c9_pmcnten & (1 << counter));
if (counter == 31) {
filter = env->cp15.pmccfiltr_el0;
} else {
filter = env->cp15.c14_pmevtyper[counter];
}
if (el == 0) {
filtered = filter & PMXEVTYPER_U;
} else if (el == 1) {
filtered = filter & PMXEVTYPER_P;
}
if (counter != 31) {
/*
* If not checking PMCCNTR, ensure the counter is setup to an event we
* support
*/
uint16_t event = filter & PMXEVTYPER_EVTCOUNT;
if (!pmu_event_supported(event)) {
return false;
}
}
return enabled && !filtered;
}
static void pmswinc_write(CPUARMState *env, uint64_t value)
{
unsigned int i;
for (i = 0; i < pmu_num_counters(env); i++) {
/* Increment a counter's count iff: */
if ((value & (1 << i)) && /* counter's bit is set */
/* counter is enabled and not filtered */
pmu_counter_enabled(env, i) &&
/* counter is SW_INCR */
(env->cp15.c14_pmevtyper[i] & PMXEVTYPER_EVTCOUNT) == 0x0) {
/*
* Detect if this write causes an overflow since we can't predict
* PMSWINC overflows like we can for other events
*/
uint32_t new_pmswinc = env->cp15.c14_pmevcntr[i] + 1;
if (env->cp15.c14_pmevcntr[i] & ~new_pmswinc & INT32_MIN) {
env->cp15.c9_pmovsr |= (1 << i);
pmu_update_irq(env);
}
env->cp15.c14_pmevcntr[i] = new_pmswinc;
}
}
}
static bool hvf_sysreg_write_cp(CPUState *cpu, uint32_t reg, uint64_t val)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
const ARMCPRegInfo *ri;
ri = get_arm_cp_reginfo(arm_cpu->cp_regs, hvf_reg2cp_reg(reg));
if (ri) {
if (ri->accessfn) {
if (ri->accessfn(env, ri, false) != CP_ACCESS_OK) {
return false;
}
}
if (ri->writefn) {
ri->writefn(env, ri, val);
} else {
CPREG_FIELD64(env, ri) = val;
}
trace_hvf_vgic_write(ri->name, val);
return true;
}
return false;
}
static int hvf_sysreg_write(CPUState *cpu, uint32_t reg, uint64_t val)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
trace_hvf_sysreg_write(reg,
SYSREG_OP0(reg),
SYSREG_OP1(reg),
SYSREG_CRN(reg),
SYSREG_CRM(reg),
SYSREG_OP2(reg),
val);
switch (reg) {
case SYSREG_PMCCNTR_EL0:
pmu_op_start(env);
env->cp15.c15_ccnt = val;
pmu_op_finish(env);
break;
case SYSREG_PMCR_EL0:
pmu_op_start(env);
if (val & PMCRC) {
/* The counter has been reset */
env->cp15.c15_ccnt = 0;
}
if (val & PMCRP) {
unsigned int i;
for (i = 0; i < pmu_num_counters(env); i++) {
env->cp15.c14_pmevcntr[i] = 0;
}
}
env->cp15.c9_pmcr &= ~PMCR_WRITABLE_MASK;
env->cp15.c9_pmcr |= (val & PMCR_WRITABLE_MASK);
pmu_op_finish(env);
break;
case SYSREG_PMUSERENR_EL0:
env->cp15.c9_pmuserenr = val & 0xf;
break;
case SYSREG_PMCNTENSET_EL0:
env->cp15.c9_pmcnten |= (val & pmu_counter_mask(env));
break;
case SYSREG_PMCNTENCLR_EL0:
env->cp15.c9_pmcnten &= ~(val & pmu_counter_mask(env));
break;
case SYSREG_PMINTENCLR_EL1:
pmu_op_start(env);
env->cp15.c9_pminten |= val;
pmu_op_finish(env);
break;
case SYSREG_PMOVSCLR_EL0:
pmu_op_start(env);
env->cp15.c9_pmovsr &= ~val;
pmu_op_finish(env);
break;
case SYSREG_PMSWINC_EL0:
pmu_op_start(env);
pmswinc_write(env, val);
pmu_op_finish(env);
break;
case SYSREG_PMSELR_EL0:
env->cp15.c9_pmselr = val & 0x1f;
break;
case SYSREG_PMCCFILTR_EL0:
pmu_op_start(env);
env->cp15.pmccfiltr_el0 = val & PMCCFILTR_EL0;
pmu_op_finish(env);
break;
case SYSREG_OSLAR_EL1:
env->cp15.oslsr_el1 = val & 1;
break;
case SYSREG_OSDLR_EL1:
/* Dummy register */
break;
case SYSREG_ICC_AP0R0_EL1:
case SYSREG_ICC_AP0R1_EL1:
case SYSREG_ICC_AP0R2_EL1:
case SYSREG_ICC_AP0R3_EL1:
case SYSREG_ICC_AP1R0_EL1:
case SYSREG_ICC_AP1R1_EL1:
case SYSREG_ICC_AP1R2_EL1:
case SYSREG_ICC_AP1R3_EL1:
case SYSREG_ICC_ASGI1R_EL1:
case SYSREG_ICC_BPR0_EL1:
case SYSREG_ICC_BPR1_EL1:
case SYSREG_ICC_CTLR_EL1:
case SYSREG_ICC_DIR_EL1:
case SYSREG_ICC_EOIR0_EL1:
case SYSREG_ICC_EOIR1_EL1:
case SYSREG_ICC_HPPIR0_EL1:
case SYSREG_ICC_HPPIR1_EL1:
case SYSREG_ICC_IAR0_EL1:
case SYSREG_ICC_IAR1_EL1:
case SYSREG_ICC_IGRPEN0_EL1:
case SYSREG_ICC_IGRPEN1_EL1:
case SYSREG_ICC_PMR_EL1:
case SYSREG_ICC_SGI0R_EL1:
case SYSREG_ICC_SGI1R_EL1:
case SYSREG_ICC_SRE_EL1:
/* Call the TCG sysreg handler. This is only safe for GICv3 regs. */
if (!hvf_sysreg_write_cp(cpu, reg, val)) {
hvf_raise_exception(cpu, EXCP_UDEF, syn_uncategorized());
}
break;
case SYSREG_MDSCR_EL1:
env->cp15.mdscr_el1 = val;
break;
case SYSREG_DBGBVR0_EL1:
case SYSREG_DBGBVR1_EL1:
case SYSREG_DBGBVR2_EL1:
case SYSREG_DBGBVR3_EL1:
case SYSREG_DBGBVR4_EL1:
case SYSREG_DBGBVR5_EL1:
case SYSREG_DBGBVR6_EL1:
case SYSREG_DBGBVR7_EL1:
case SYSREG_DBGBVR8_EL1:
case SYSREG_DBGBVR9_EL1:
case SYSREG_DBGBVR10_EL1:
case SYSREG_DBGBVR11_EL1:
case SYSREG_DBGBVR12_EL1:
case SYSREG_DBGBVR13_EL1:
case SYSREG_DBGBVR14_EL1:
case SYSREG_DBGBVR15_EL1:
env->cp15.dbgbvr[SYSREG_CRM(reg)] = val;
break;
case SYSREG_DBGBCR0_EL1:
case SYSREG_DBGBCR1_EL1:
case SYSREG_DBGBCR2_EL1:
case SYSREG_DBGBCR3_EL1:
case SYSREG_DBGBCR4_EL1:
case SYSREG_DBGBCR5_EL1:
case SYSREG_DBGBCR6_EL1:
case SYSREG_DBGBCR7_EL1:
case SYSREG_DBGBCR8_EL1:
case SYSREG_DBGBCR9_EL1:
case SYSREG_DBGBCR10_EL1:
case SYSREG_DBGBCR11_EL1:
case SYSREG_DBGBCR12_EL1:
case SYSREG_DBGBCR13_EL1:
case SYSREG_DBGBCR14_EL1:
case SYSREG_DBGBCR15_EL1:
env->cp15.dbgbcr[SYSREG_CRM(reg)] = val;
break;
case SYSREG_DBGWVR0_EL1:
case SYSREG_DBGWVR1_EL1:
case SYSREG_DBGWVR2_EL1:
case SYSREG_DBGWVR3_EL1:
case SYSREG_DBGWVR4_EL1:
case SYSREG_DBGWVR5_EL1:
case SYSREG_DBGWVR6_EL1:
case SYSREG_DBGWVR7_EL1:
case SYSREG_DBGWVR8_EL1:
case SYSREG_DBGWVR9_EL1:
case SYSREG_DBGWVR10_EL1:
case SYSREG_DBGWVR11_EL1:
case SYSREG_DBGWVR12_EL1:
case SYSREG_DBGWVR13_EL1:
case SYSREG_DBGWVR14_EL1:
case SYSREG_DBGWVR15_EL1:
env->cp15.dbgwvr[SYSREG_CRM(reg)] = val;
break;
case SYSREG_DBGWCR0_EL1:
case SYSREG_DBGWCR1_EL1:
case SYSREG_DBGWCR2_EL1:
case SYSREG_DBGWCR3_EL1:
case SYSREG_DBGWCR4_EL1:
case SYSREG_DBGWCR5_EL1:
case SYSREG_DBGWCR6_EL1:
case SYSREG_DBGWCR7_EL1:
case SYSREG_DBGWCR8_EL1:
case SYSREG_DBGWCR9_EL1:
case SYSREG_DBGWCR10_EL1:
case SYSREG_DBGWCR11_EL1:
case SYSREG_DBGWCR12_EL1:
case SYSREG_DBGWCR13_EL1:
case SYSREG_DBGWCR14_EL1:
case SYSREG_DBGWCR15_EL1:
env->cp15.dbgwcr[SYSREG_CRM(reg)] = val;
break;
default:
cpu_synchronize_state(cpu);
trace_hvf_unhandled_sysreg_write(env->pc, reg,
SYSREG_OP0(reg),
SYSREG_OP1(reg),
SYSREG_CRN(reg),
SYSREG_CRM(reg),
SYSREG_OP2(reg));
hvf_raise_exception(cpu, EXCP_UDEF, syn_uncategorized());
return 1;
}
return 0;
}
static int hvf_inject_interrupts(CPUState *cpu)
{
if (cpu->interrupt_request & CPU_INTERRUPT_FIQ) {
trace_hvf_inject_fiq();
hv_vcpu_set_pending_interrupt(cpu->accel->fd, HV_INTERRUPT_TYPE_FIQ,
true);
}
if (cpu->interrupt_request & CPU_INTERRUPT_HARD) {
trace_hvf_inject_irq();
hv_vcpu_set_pending_interrupt(cpu->accel->fd, HV_INTERRUPT_TYPE_IRQ,
true);
}
return 0;
}
static uint64_t hvf_vtimer_val_raw(void)
{
/*
* mach_absolute_time() returns the vtimer value without the VM
* offset that we define. Add our own offset on top.
*/
return mach_absolute_time() - hvf_state->vtimer_offset;
}
static uint64_t hvf_vtimer_val(void)
{
if (!runstate_is_running()) {
/* VM is paused, the vtimer value is in vtimer.vtimer_val */
return vtimer.vtimer_val;
}
return hvf_vtimer_val_raw();
}
static void hvf_wait_for_ipi(CPUState *cpu, struct timespec *ts)
{
/*
* Use pselect to sleep so that other threads can IPI us while we're
* sleeping.
*/
qatomic_set_mb(&cpu->thread_kicked, false);
qemu_mutex_unlock_iothread();
pselect(0, 0, 0, 0, ts, &cpu->accel->unblock_ipi_mask);
qemu_mutex_lock_iothread();
}
static void hvf_wfi(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
struct timespec ts;
hv_return_t r;
uint64_t ctl;
uint64_t cval;
int64_t ticks_to_sleep;
uint64_t seconds;
uint64_t nanos;
uint32_t cntfrq;
if (cpu->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_FIQ)) {
/* Interrupt pending, no need to wait */
return;
}
r = hv_vcpu_get_sys_reg(cpu->accel->fd, HV_SYS_REG_CNTV_CTL_EL0, &ctl);
assert_hvf_ok(r);
if (!(ctl & 1) || (ctl & 2)) {
/* Timer disabled or masked, just wait for an IPI. */
hvf_wait_for_ipi(cpu, NULL);
return;
}
r = hv_vcpu_get_sys_reg(cpu->accel->fd, HV_SYS_REG_CNTV_CVAL_EL0, &cval);
assert_hvf_ok(r);
ticks_to_sleep = cval - hvf_vtimer_val();
if (ticks_to_sleep < 0) {
return;
}
cntfrq = gt_cntfrq_period_ns(arm_cpu);
seconds = muldiv64(ticks_to_sleep, cntfrq, NANOSECONDS_PER_SECOND);
ticks_to_sleep -= muldiv64(seconds, NANOSECONDS_PER_SECOND, cntfrq);
nanos = ticks_to_sleep * cntfrq;
/*
* Don't sleep for less than the time a context switch would take,
* so that we can satisfy fast timer requests on the same CPU.
* Measurements on M1 show the sweet spot to be ~2ms.
*/
if (!seconds && nanos < (2 * SCALE_MS)) {
return;
}
ts = (struct timespec) { seconds, nanos };
hvf_wait_for_ipi(cpu, &ts);
}
static void hvf_sync_vtimer(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
hv_return_t r;
uint64_t ctl;
bool irq_state;
if (!cpu->accel->vtimer_masked) {
/* We will get notified on vtimer changes by hvf, nothing to do */
return;
}
r = hv_vcpu_get_sys_reg(cpu->accel->fd, HV_SYS_REG_CNTV_CTL_EL0, &ctl);
assert_hvf_ok(r);
irq_state = (ctl & (TMR_CTL_ENABLE | TMR_CTL_IMASK | TMR_CTL_ISTATUS)) ==
(TMR_CTL_ENABLE | TMR_CTL_ISTATUS);
qemu_set_irq(arm_cpu->gt_timer_outputs[GTIMER_VIRT], irq_state);
if (!irq_state) {
/* Timer no longer asserting, we can unmask it */
hv_vcpu_set_vtimer_mask(cpu->accel->fd, false);
cpu->accel->vtimer_masked = false;
}
}
int hvf_vcpu_exec(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
int ret;
hv_vcpu_exit_t *hvf_exit = cpu->accel->exit;
hv_return_t r;
bool advance_pc = false;
if (!(cpu->singlestep_enabled & SSTEP_NOIRQ) &&
hvf_inject_interrupts(cpu)) {
return EXCP_INTERRUPT;
}
if (cpu->halted) {
return EXCP_HLT;
}
flush_cpu_state(cpu);
qemu_mutex_unlock_iothread();
assert_hvf_ok(hv_vcpu_run(cpu->accel->fd));
/* handle VMEXIT */
uint64_t exit_reason = hvf_exit->reason;
uint64_t syndrome = hvf_exit->exception.syndrome;
uint32_t ec = syn_get_ec(syndrome);
ret = 0;
qemu_mutex_lock_iothread();
switch (exit_reason) {
case HV_EXIT_REASON_EXCEPTION:
/* This is the main one, handle below. */
break;
case HV_EXIT_REASON_VTIMER_ACTIVATED:
qemu_set_irq(arm_cpu->gt_timer_outputs[GTIMER_VIRT], 1);
cpu->accel->vtimer_masked = true;
return 0;
case HV_EXIT_REASON_CANCELED:
/* we got kicked, no exit to process */
return 0;
default:
g_assert_not_reached();
}
hvf_sync_vtimer(cpu);
switch (ec) {
case EC_SOFTWARESTEP: {
ret = EXCP_DEBUG;
if (!cpu->singlestep_enabled) {
error_report("EC_SOFTWARESTEP but single-stepping not enabled");
}
break;
}
case EC_AA64_BKPT: {
ret = EXCP_DEBUG;
cpu_synchronize_state(cpu);
if (!hvf_find_sw_breakpoint(cpu, env->pc)) {
/* Re-inject into the guest */
ret = 0;
hvf_raise_exception(cpu, EXCP_BKPT, syn_aa64_bkpt(0));
}
break;
}
case EC_BREAKPOINT: {
ret = EXCP_DEBUG;
cpu_synchronize_state(cpu);
if (!find_hw_breakpoint(cpu, env->pc)) {
error_report("EC_BREAKPOINT but unknown hw breakpoint");
}
break;
}
case EC_WATCHPOINT: {
ret = EXCP_DEBUG;
cpu_synchronize_state(cpu);
CPUWatchpoint *wp =
find_hw_watchpoint(cpu, hvf_exit->exception.virtual_address);
if (!wp) {
error_report("EXCP_DEBUG but unknown hw watchpoint");
}
cpu->watchpoint_hit = wp;
break;
}
case EC_DATAABORT: {
bool isv = syndrome & ARM_EL_ISV;
bool iswrite = (syndrome >> 6) & 1;
bool s1ptw = (syndrome >> 7) & 1;
uint32_t sas = (syndrome >> 22) & 3;
uint32_t len = 1 << sas;
uint32_t srt = (syndrome >> 16) & 0x1f;
uint32_t cm = (syndrome >> 8) & 0x1;
uint64_t val = 0;
trace_hvf_data_abort(env->pc, hvf_exit->exception.virtual_address,
hvf_exit->exception.physical_address, isv,
iswrite, s1ptw, len, srt);
if (cm) {
/* We don't cache MMIO regions */
advance_pc = true;
break;
}
assert(isv);
if (iswrite) {
val = hvf_get_reg(cpu, srt);
address_space_write(&address_space_memory,
hvf_exit->exception.physical_address,
MEMTXATTRS_UNSPECIFIED, &val, len);
} else {
address_space_read(&address_space_memory,
hvf_exit->exception.physical_address,
MEMTXATTRS_UNSPECIFIED, &val, len);
hvf_set_reg(cpu, srt, val);
}
advance_pc = true;
break;
}
case EC_SYSTEMREGISTERTRAP: {
bool isread = (syndrome >> 0) & 1;
uint32_t rt = (syndrome >> 5) & 0x1f;
uint32_t reg = syndrome & SYSREG_MASK;
uint64_t val;
int sysreg_ret = 0;
if (isread) {
sysreg_ret = hvf_sysreg_read(cpu, reg, rt);
} else {
val = hvf_get_reg(cpu, rt);
sysreg_ret = hvf_sysreg_write(cpu, reg, val);
}
advance_pc = !sysreg_ret;
break;
}
case EC_WFX_TRAP:
advance_pc = true;
if (!(syndrome & WFX_IS_WFE)) {
hvf_wfi(cpu);
}
break;
case EC_AA64_HVC:
cpu_synchronize_state(cpu);
if (arm_cpu->psci_conduit == QEMU_PSCI_CONDUIT_HVC) {
if (!hvf_handle_psci_call(cpu)) {
trace_hvf_unknown_hvc(env->xregs[0]);
/* SMCCC 1.3 section 5.2 says every unknown SMCCC call returns -1 */
env->xregs[0] = -1;
}
} else {
trace_hvf_unknown_hvc(env->xregs[0]);
hvf_raise_exception(cpu, EXCP_UDEF, syn_uncategorized());
}
break;
case EC_AA64_SMC:
cpu_synchronize_state(cpu);
if (arm_cpu->psci_conduit == QEMU_PSCI_CONDUIT_SMC) {
advance_pc = true;
if (!hvf_handle_psci_call(cpu)) {
trace_hvf_unknown_smc(env->xregs[0]);
/* SMCCC 1.3 section 5.2 says every unknown SMCCC call returns -1 */
env->xregs[0] = -1;
}
} else {
trace_hvf_unknown_smc(env->xregs[0]);
hvf_raise_exception(cpu, EXCP_UDEF, syn_uncategorized());
}
break;
default:
cpu_synchronize_state(cpu);
trace_hvf_exit(syndrome, ec, env->pc);
error_report("0x%llx: unhandled exception ec=0x%x", env->pc, ec);
}
if (advance_pc) {
uint64_t pc;
flush_cpu_state(cpu);
r = hv_vcpu_get_reg(cpu->accel->fd, HV_REG_PC, &pc);
assert_hvf_ok(r);
pc += 4;
r = hv_vcpu_set_reg(cpu->accel->fd, HV_REG_PC, pc);
assert_hvf_ok(r);
/* Handle single-stepping over instructions which trigger a VM exit */
if (cpu->singlestep_enabled) {
ret = EXCP_DEBUG;
}
}
return ret;
}
static const VMStateDescription vmstate_hvf_vtimer = {
.name = "hvf-vtimer",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT64(vtimer_val, HVFVTimer),
VMSTATE_END_OF_LIST()
},
};
static void hvf_vm_state_change(void *opaque, bool running, RunState state)
{
HVFVTimer *s = opaque;
if (running) {
/* Update vtimer offset on all CPUs */
hvf_state->vtimer_offset = mach_absolute_time() - s->vtimer_val;
cpu_synchronize_all_states();
} else {
/* Remember vtimer value on every pause */
s->vtimer_val = hvf_vtimer_val_raw();
}
}
int hvf_arch_init(void)
{
hvf_state->vtimer_offset = mach_absolute_time();
vmstate_register(NULL, 0, &vmstate_hvf_vtimer, &vtimer);
qemu_add_vm_change_state_handler(hvf_vm_state_change, &vtimer);
hvf_arm_init_debug();
return 0;
}
static const uint32_t brk_insn = 0xd4200000;
int hvf_arch_insert_sw_breakpoint(CPUState *cpu, struct hvf_sw_breakpoint *bp)
{
if (cpu_memory_rw_debug(cpu, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) ||
cpu_memory_rw_debug(cpu, bp->pc, (uint8_t *)&brk_insn, 4, 1)) {
return -EINVAL;
}
return 0;
}
int hvf_arch_remove_sw_breakpoint(CPUState *cpu, struct hvf_sw_breakpoint *bp)
{
static uint32_t brk;
if (cpu_memory_rw_debug(cpu, bp->pc, (uint8_t *)&brk, 4, 0) ||
brk != brk_insn ||
cpu_memory_rw_debug(cpu, bp->pc, (uint8_t *)&bp->saved_insn, 4, 1)) {
return -EINVAL;
}
return 0;
}
int hvf_arch_insert_hw_breakpoint(vaddr addr, vaddr len, int type)
{
switch (type) {
case GDB_BREAKPOINT_HW:
return insert_hw_breakpoint(addr);
case GDB_WATCHPOINT_READ:
case GDB_WATCHPOINT_WRITE:
case GDB_WATCHPOINT_ACCESS:
return insert_hw_watchpoint(addr, len, type);
default:
return -ENOSYS;
}
}
int hvf_arch_remove_hw_breakpoint(vaddr addr, vaddr len, int type)
{
switch (type) {
case GDB_BREAKPOINT_HW:
return delete_hw_breakpoint(addr);
case GDB_WATCHPOINT_READ:
case GDB_WATCHPOINT_WRITE:
case GDB_WATCHPOINT_ACCESS:
return delete_hw_watchpoint(addr, len, type);
default:
return -ENOSYS;
}
}
void hvf_arch_remove_all_hw_breakpoints(void)
{
if (cur_hw_wps > 0) {
g_array_remove_range(hw_watchpoints, 0, cur_hw_wps);
}
if (cur_hw_bps > 0) {
g_array_remove_range(hw_breakpoints, 0, cur_hw_bps);
}
}
/*
* Update the vCPU with the gdbstub's view of debug registers. This view
* consists of all hardware breakpoints and watchpoints inserted so far while
* debugging the guest.
*/
static void hvf_put_gdbstub_debug_registers(CPUState *cpu)
{
hv_return_t r = HV_SUCCESS;
int i;
for (i = 0; i < cur_hw_bps; i++) {
HWBreakpoint *bp = get_hw_bp(i);
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgbcr_regs[i], bp->bcr);
assert_hvf_ok(r);
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgbvr_regs[i], bp->bvr);
assert_hvf_ok(r);
}
for (i = cur_hw_bps; i < max_hw_bps; i++) {
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgbcr_regs[i], 0);
assert_hvf_ok(r);
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgbvr_regs[i], 0);
assert_hvf_ok(r);
}
for (i = 0; i < cur_hw_wps; i++) {
HWWatchpoint *wp = get_hw_wp(i);
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgwcr_regs[i], wp->wcr);
assert_hvf_ok(r);
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgwvr_regs[i], wp->wvr);
assert_hvf_ok(r);
}
for (i = cur_hw_wps; i < max_hw_wps; i++) {
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgwcr_regs[i], 0);
assert_hvf_ok(r);
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgwvr_regs[i], 0);
assert_hvf_ok(r);
}
}
/*
* Update the vCPU with the guest's view of debug registers. This view is kept
* in the environment at all times.
*/
static void hvf_put_guest_debug_registers(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
hv_return_t r = HV_SUCCESS;
int i;
for (i = 0; i < max_hw_bps; i++) {
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgbcr_regs[i],
env->cp15.dbgbcr[i]);
assert_hvf_ok(r);
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgbvr_regs[i],
env->cp15.dbgbvr[i]);
assert_hvf_ok(r);
}
for (i = 0; i < max_hw_wps; i++) {
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgwcr_regs[i],
env->cp15.dbgwcr[i]);
assert_hvf_ok(r);
r = hv_vcpu_set_sys_reg(cpu->accel->fd, dbgwvr_regs[i],
env->cp15.dbgwvr[i]);
assert_hvf_ok(r);
}
}
static inline bool hvf_arm_hw_debug_active(CPUState *cpu)
{
return ((cur_hw_wps > 0) || (cur_hw_bps > 0));
}
static void hvf_arch_set_traps(void)
{
CPUState *cpu;
bool should_enable_traps = false;
hv_return_t r = HV_SUCCESS;
/* Check whether guest debugging is enabled for at least one vCPU; if it
* is, enable exiting the guest on all vCPUs */
CPU_FOREACH(cpu) {
should_enable_traps |= cpu->accel->guest_debug_enabled;
}
CPU_FOREACH(cpu) {
/* Set whether debug exceptions exit the guest */
r = hv_vcpu_set_trap_debug_exceptions(cpu->accel->fd,
should_enable_traps);
assert_hvf_ok(r);
/* Set whether accesses to debug registers exit the guest */
r = hv_vcpu_set_trap_debug_reg_accesses(cpu->accel->fd,
should_enable_traps);
assert_hvf_ok(r);
}
}
void hvf_arch_update_guest_debug(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
/* Check whether guest debugging is enabled */
cpu->accel->guest_debug_enabled = cpu->singlestep_enabled ||
hvf_sw_breakpoints_active(cpu) ||
hvf_arm_hw_debug_active(cpu);
/* Update debug registers */
if (cpu->accel->guest_debug_enabled) {
hvf_put_gdbstub_debug_registers(cpu);
} else {
hvf_put_guest_debug_registers(cpu);
}
cpu_synchronize_state(cpu);
/* Enable/disable single-stepping */
if (cpu->singlestep_enabled) {
env->cp15.mdscr_el1 =
deposit64(env->cp15.mdscr_el1, MDSCR_EL1_SS_SHIFT, 1, 1);
pstate_write(env, pstate_read(env) | PSTATE_SS);
} else {
env->cp15.mdscr_el1 =
deposit64(env->cp15.mdscr_el1, MDSCR_EL1_SS_SHIFT, 1, 0);
}
/* Enable/disable Breakpoint exceptions */
if (hvf_arm_hw_debug_active(cpu)) {
env->cp15.mdscr_el1 =
deposit64(env->cp15.mdscr_el1, MDSCR_EL1_MDE_SHIFT, 1, 1);
} else {
env->cp15.mdscr_el1 =
deposit64(env->cp15.mdscr_el1, MDSCR_EL1_MDE_SHIFT, 1, 0);
}
hvf_arch_set_traps();
}
inline bool hvf_arch_supports_guest_debug(void)
{
return true;
}
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