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qemu/target/arm/hvf/hvf.c
Alexander Graf ad99f64f1c hvf: arm: Use macros for sysreg shift/masking 
We are parsing the syndrome field for sysregs in multiple places across
the hvf code, but repeat shift/mask operations with hard coded constants
every time. This is an error prone approach and makes it harder to reason
about the correctness of these operations.

Let's introduce macros that allow us to unify the constants used as well
as create new helpers to extract fields from the sysreg value.

Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alexander Graf <agraf@csgraf.de>
Reviewed-by: Cameron Esfahani <dirty@apple.com <mailto:dirty@apple.com>>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20220209124135.69183-1-agraf@csgraf.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-02-21 13:30:19 +00:00

1311 lines
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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-common.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 <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"
#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 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->hvf->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->hvf->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->hvf->fd, HV_REG_FPCR, &val);
assert_hvf_ok(ret);
vfp_set_fpcr(env, val);
val = 0;
ret = hv_vcpu_get_reg(cpu->hvf->fd, HV_REG_FPSR, &val);
assert_hvf_ok(ret);
vfp_set_fpsr(env, val);
ret = hv_vcpu_get_reg(cpu->hvf->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;
}
ret = hv_vcpu_get_sys_reg(cpu->hvf->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->hvf->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->hvf->fd, hvf_fpreg_match[i].reg,
fpval);
assert_hvf_ok(ret);
}
ret = hv_vcpu_set_reg(cpu->hvf->fd, HV_REG_FPCR, vfp_get_fpcr(env));
assert_hvf_ok(ret);
ret = hv_vcpu_set_reg(cpu->hvf->fd, HV_REG_FPSR, vfp_get_fpsr(env));
assert_hvf_ok(ret);
ret = hv_vcpu_set_reg(cpu->hvf->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;
}
val = arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx];
ret = hv_vcpu_set_sys_reg(cpu->hvf->fd, hvf_sreg_match[i].reg, val);
assert_hvf_ok(ret);
}
ret = hv_vcpu_set_vtimer_offset(cpu->hvf->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->hvf->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->hvf->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 },
{ 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 = 1;
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->hvf->fd, HV_SYS_REG_MIDR_EL1,
arm_cpu->midr);
assert_hvf_ok(ret);
ret = hv_vcpu_set_sys_reg(cpu->hvf->fd, HV_SYS_REG_MPIDR_EL1,
arm_cpu->mp_affinity);
assert_hvf_ok(ret);
ret = hv_vcpu_get_sys_reg(cpu->hvf->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->hvf->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->hvf->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->hvf->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_0_2_RET_VERSION_0_2;
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;
default:
return false;
}
env->xregs[0] = ret;
return true;
}
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;
default:
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 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_WRITEABLE_MASK;
env->cp15.c9_pmcr |= (val & PMCR_WRITEABLE_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;
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->hvf->fd, HV_INTERRUPT_TYPE_FIQ,
true);
}
if (cpu->interrupt_request & CPU_INTERRUPT_HARD) {
trace_hvf_inject_irq();
hv_vcpu_set_pending_interrupt(cpu->hvf->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_mb_set(&cpu->thread_kicked, false);
qemu_mutex_unlock_iothread();
pselect(0, 0, 0, 0, ts, &cpu->hvf->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->hvf->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->hvf->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->hvf->vtimer_masked) {
/* We will get notified on vtimer changes by hvf, nothing to do */
return;
}
r = hv_vcpu_get_sys_reg(cpu->hvf->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->hvf->fd, false);
cpu->hvf->vtimer_masked = false;
}
}
int hvf_vcpu_exec(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
hv_vcpu_exit_t *hvf_exit = cpu->hvf->exit;
hv_return_t r;
bool advance_pc = false;
if (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->hvf->fd));
/* handle VMEXIT */
uint64_t exit_reason = hvf_exit->reason;
uint64_t syndrome = hvf_exit->exception.syndrome;
uint32_t ec = syn_get_ec(syndrome);
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->hvf->vtimer_masked = true;
return 0;
case HV_EXIT_REASON_CANCELED:
/* we got kicked, no exit to process */
return 0;
default:
assert(0);
}
hvf_sync_vtimer(cpu);
switch (ec) {
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 ret = 0;
if (isread) {
ret = hvf_sysreg_read(cpu, reg, rt);
} else {
val = hvf_get_reg(cpu, rt);
ret = hvf_sysreg_write(cpu, reg, val);
}
advance_pc = !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->hvf->fd, HV_REG_PC, &pc);
assert_hvf_ok(r);
pc += 4;
r = hv_vcpu_set_reg(cpu->hvf->fd, HV_REG_PC, pc);
assert_hvf_ok(r);
}
return 0;
}
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);
return 0;
}
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