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target-arm: Add VPIDR_EL2

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Backports commit 731de9e60074620aa7d565f01f989adacd493514 from qemu
This commit is contained in:
Edgar E. Iglesias 2018-02-15 12:41:31 -05:00 committed by Lioncash
parent 2dfdb13786
commit 766dccbad9
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GPG key ID: 4E3C3CC1031BA9C7
2 changed files with 35 additions and 2 deletions
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1
qemu/target-arm/cpu.h
View file

@ -389,6 +389,7 @@ typedef struct CPUARMState {
*/
uint64_t c15_ccnt;
uint64_t pmccfiltr_el0; /* Performance Monitor Filter Register */
uint64_t vpidr_el2; /* Virtualization Processor ID Register */
} cp15;
struct {

36
qemu/target-arm/helper.c
View file

@ -2136,6 +2136,18 @@ static const ARMCPRegInfo strongarm_cp_reginfo[] = {
REGINFO_SENTINEL
};
static uint64_t midr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = arm_env_get_cpu(env);
unsigned int cur_el = arm_current_el(env);
bool secure = arm_is_secure(env);
if (arm_feature(&cpu->env, ARM_FEATURE_EL2) && !secure && cur_el == 1) {
return env->cp15.vpidr_el2;
}
return raw_read(env, ri);
}
static uint64_t mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = ARM_CPU(env->uc, arm_env_get_cpu(env));
@ -3561,6 +3573,15 @@ void register_cp_regs_for_features(ARMCPU *cpu)
define_arm_cp_regs(cpu, v8_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_EL2)) {
ARMCPRegInfo vpidr_regs[] = {
{ "VPIDR", 15,0,0, 0,4,0, ARM_CP_STATE_AA32, 0,
PL2_RW, 0, NULL, cpu->midr, offsetof(CPUARMState, cp15.vpidr_el2), {0, 0},
access_el3_aa32ns },
{ "VPIDR_EL2", 0,0,0, 3,4,0, ARM_CP_STATE_AA64, 0,
PL2_RW, 0, NULL, cpu->midr, offsetof(CPUARMState, cp15.vpidr_el2) },
REGINFO_SENTINEL
};
define_arm_cp_regs(cpu, vpidr_regs);
define_arm_cp_regs(cpu, el2_cp_reginfo);
/* RVBAR_EL2 is only implemented if EL2 is the highest EL */
if (!arm_feature(env, ARM_FEATURE_EL3)) {
@ -3575,6 +3596,16 @@ void register_cp_regs_for_features(ARMCPU *cpu)
* register the no_el2 reginfos.
*/
if (arm_feature(env, ARM_FEATURE_EL3)) {
/* When EL3 exists but not EL2, VPIDR takes the value
* of MIDR_EL1.
*/
ARMCPRegInfo vpidr_regs[] = {
{ "VPIDR_EL2", 0,0,0, 3,4,0, ARM_CP_STATE_BOTH, ARM_CP_CONST,
PL2_RW, 0, NULL, cpu->midr, offsetof(CPUARMState, cp15.vpidr_el2), {0, 0},
access_el3_aa32ns_aa64any },
REGINFO_SENTINEL
};
define_arm_cp_regs(cpu, vpidr_regs);
define_arm_cp_regs(cpu, el3_no_el2_cp_reginfo);
}
}
@ -3649,7 +3680,7 @@ void register_cp_regs_for_features(ARMCPU *cpu)
*/
{ "MIDR", 15,0,0, 0,0,CP_ANY, 0,
ARM_CP_OVERRIDE, PL1_R, 0, NULL, cpu->midr, offsetof(CPUARMState, cp15.c0_cpuid), {0, 0},
NULL, NULL,arm_cp_write_ignore, NULL,raw_write, },
NULL, midr_read, arm_cp_write_ignore, NULL, raw_write, },
/* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
{ "DUMMY",
15,0,3, 0,0,CP_ANY, 0,
@ -3670,7 +3701,8 @@ void register_cp_regs_for_features(ARMCPU *cpu)
};
ARMCPRegInfo id_v8_midr_cp_reginfo[] = {
{ "MIDR_EL1", 0,0,0, 3,0,0, ARM_CP_STATE_BOTH,
ARM_CP_CONST, PL1_R, 0, NULL, cpu->midr },
ARM_CP_NO_RAW, PL1_R, 0, NULL, cpu->midr, offsetof(CPUARMState, cp15.c0_cpuid), {0, 0},
NULL, midr_read },
/* crn = 0 op1 = 0 crm = 0 op2 = 4,7 : AArch32 aliases of MIDR */
{ "MIDR", 15,0,0, 0,0,4, 0, ARM_CP_ALIAS | ARM_CP_CONST,
PL1_R, 0, NULL, cpu->midr },