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target/arm: Implement HCR_EL2.TID4 traps 

For FEAT_EVT, the HCR_EL2.TID4 trap allows trapping of the cache ID
registers CCSIDR_EL1, CCSIDR2_EL1, CLIDR_EL1 and CSSELR_EL1 (and
their AArch32 equivalents).  This is a subset of the registers
trapped by HCR_EL2.TID2, which includes all of these and also the
CTR_EL0 register.

Our implementation already uses a separate access function for
CTR_EL0 (ctr_el0_access()), so all of the registers currently using
access_aa64_tid2() should also be checking TID4.  Make that function
check both TID2 and TID4, and rename it appropriately.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Peter Maydell 2022-12-14 14:27:09 +00:00
parent 2d3ce4c6f3
commit e2ce5fcde4
1 changed files with 9 additions and 8 deletions
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17
target/arm/helper.c
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@ -1895,11 +1895,12 @@ static void scr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
scr_write(env, ri, 0);
}
static CPAccessResult access_aa64_tid2(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
static CPAccessResult access_tid4(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 1 && (arm_hcr_el2_eff(env) & HCR_TID2)) {
if (arm_current_el(env) == 1 &&
(arm_hcr_el2_eff(env) & (HCR_TID2 | HCR_TID4))) {
return CP_ACCESS_TRAP_EL2;
}
@ -2130,12 +2131,12 @@ static const ARMCPRegInfo v7_cp_reginfo[] = {
{ .name = "CCSIDR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 0,
.access = PL1_R,
.accessfn = access_aa64_tid2,
.accessfn = access_tid4,
.readfn = ccsidr_read, .type = ARM_CP_NO_RAW },
{ .name = "CSSELR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 0, .crm = 0, .opc1 = 2, .opc2 = 0,
.access = PL1_RW,
.accessfn = access_aa64_tid2,
.accessfn = access_tid4,
.writefn = csselr_write, .resetvalue = 0,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.csselr_s),
offsetof(CPUARMState, cp15.csselr_ns) } },
@ -7281,7 +7282,7 @@ static const ARMCPRegInfo ccsidr2_reginfo[] = {
{ .name = "CCSIDR2", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 1, .crn = 0, .crm = 0, .opc2 = 2,
.access = PL1_R,
.accessfn = access_aa64_tid2,
.accessfn = access_tid4,
.readfn = ccsidr2_read, .type = ARM_CP_NO_RAW },
};
@ -7581,7 +7582,7 @@ void register_cp_regs_for_features(ARMCPU *cpu)
.name = "CLIDR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 1,
.access = PL1_R, .type = ARM_CP_CONST,
.accessfn = access_aa64_tid2,
.accessfn = access_tid4,
.resetvalue = cpu->clidr
};
define_one_arm_cp_reg(cpu, &clidr);