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target/arm: add ARMv8.4-SEL2 system registers

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Backports e9152ee91cc39ed8a53d03607e6e980a7e9444e6
This commit is contained in:
Rémi Denis-Courmont 2021-03-04 14:20:06 -05:00 committed by Lioncash
parent edd5f021e6
commit a78c31e36a
2 changed files with 31 additions and 0 deletions
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7
qemu/target/arm/cpu.h
View file

@ -147,6 +147,11 @@ typedef struct {
uint32_t base_mask;
} TCR;
#define VTCR_NSW (1u << 29)
#define VTCR_NSA (1u << 30)
#define VSTCR_SW VTCR_NSW
#define VSTCR_SA VTCR_NSA
/* Define a maximum sized vector register.
* For 32-bit, this is a 128-bit NEON/AdvSIMD register.
* For 64-bit, this is a 2048-bit SVE register.
@ -297,9 +302,11 @@ typedef struct CPUARMState {
uint64_t ttbr1_el[4];
};
uint64_t vttbr_el2; /* Virtualization Translation Table Base. */
uint64_t vsttbr_el2; /* Secure Virtualization Translation Table. */
/* MMU translation table base control. */
TCR tcr_el[4];
TCR vtcr_el2; /* Virtualization Translation Control. */
TCR vstcr_el2; /* Secure Virtualization Translation Control. */
uint32_t c2_data; /* MPU data cacheable bits. */
uint32_t c2_insn; /* MPU instruction cacheable bits. */
union { /* MMU domain access control register

24
qemu/target/arm/helper.c
View file

@ -5396,6 +5396,27 @@ static const ARMCPRegInfo el2_v8_cp_reginfo[] = {
REGINFO_SENTINEL
};
static CPAccessResult sel2_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 3 || arm_is_secure_below_el3(env)) {
return CP_ACCESS_OK;
}
return CP_ACCESS_TRAP_UNCATEGORIZED;
}
static const ARMCPRegInfo el2_sec_cp_reginfo[] = {
{ .name = "VSTTBR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 6, .opc2 = 0,
.access = PL2_RW, .accessfn = sel2_access,
.fieldoffset = offsetof(CPUARMState, cp15.vsttbr_el2) },
{ .name = "VSTCR_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 2, .crm = 6, .opc2 = 2,
.access = PL2_RW, .accessfn = sel2_access,
.fieldoffset = offsetof(CPUARMState, cp15.vstcr_el2) },
REGINFO_SENTINEL
};
static CPAccessResult nsacr_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
@ -7399,6 +7420,9 @@ void register_cp_regs_for_features(ARMCPU *cpu)
if (arm_feature(env, ARM_FEATURE_V8)) {
define_arm_cp_regs(cpu, el2_v8_cp_reginfo);
}
if (cpu_isar_feature(aa64_sel2, cpu)) {
define_arm_cp_regs(cpu, el2_sec_cp_reginfo);
}
/* RVBAR_EL2 is only implemented if EL2 is the highest EL */
if (!arm_feature(env, ARM_FEATURE_EL3)) {
ARMCPRegInfo rvbar = {