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target/arm: Implement HCR_EL2.AT handling 

The FEAT_NV HCR_EL2.AT bit enables trapping of some address
translation instructions from EL1 to EL2.  Implement this behaviour.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Miguel Luis <miguel.luis@oracle.com>
This commit is contained in:
Peter Maydell 2024-01-09 14:43:45 +00:00
parent 67e55c73c3
commit 5725977915
1 changed files with 15 additions and 6 deletions
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21
target/arm/helper.c
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@ -3703,6 +3703,15 @@ static CPAccessResult at_s1e2_access(CPUARMState *env, const ARMCPRegInfo *ri,
return at_e012_access(env, ri, isread);
}
static CPAccessResult at_s1e01_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 1 && (arm_hcr_el2_eff(env) & HCR_AT)) {
return CP_ACCESS_TRAP_EL2;
}
return at_e012_access(env, ri, isread);
}
static void ats_write64(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
@ -5568,22 +5577,22 @@ static const ARMCPRegInfo v8_cp_reginfo[] = {
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 0,
.access = PL1_W, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC,
.fgt = FGT_ATS1E1R,
.accessfn = at_e012_access, .writefn = ats_write64 },
.accessfn = at_s1e01_access, .writefn = ats_write64 },
{ .name = "AT_S1E1W", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 1,
.access = PL1_W, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC,
.fgt = FGT_ATS1E1W,
.accessfn = at_e012_access, .writefn = ats_write64 },
.accessfn = at_s1e01_access, .writefn = ats_write64 },
{ .name = "AT_S1E0R", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 2,
.access = PL1_W, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC,
.fgt = FGT_ATS1E0R,
.accessfn = at_e012_access, .writefn = ats_write64 },
.accessfn = at_s1e01_access, .writefn = ats_write64 },
{ .name = "AT_S1E0W", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 3,
.access = PL1_W, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC,
.fgt = FGT_ATS1E0W,
.accessfn = at_e012_access, .writefn = ats_write64 },
.accessfn = at_s1e01_access, .writefn = ats_write64 },
{ .name = "AT_S12E1R", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 4, .crn = 7, .crm = 8, .opc2 = 4,
.access = PL2_W, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC,
@ -8168,12 +8177,12 @@ static const ARMCPRegInfo ats1e1_reginfo[] = {
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 9, .opc2 = 0,
.access = PL1_W, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC,
.fgt = FGT_ATS1E1RP,
.accessfn = at_e012_access, .writefn = ats_write64 },
.accessfn = at_s1e01_access, .writefn = ats_write64 },
{ .name = "AT_S1E1WP", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 0, .crn = 7, .crm = 9, .opc2 = 1,
.access = PL1_W, .type = ARM_CP_NO_RAW | ARM_CP_RAISES_EXC,
.fgt = FGT_ATS1E1WP,
.accessfn = at_e012_access, .writefn = ats_write64 },
.accessfn = at_s1e01_access, .writefn = ats_write64 },
};
static const ARMCPRegInfo ats1cp_reginfo[] = {