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target/arm: Treat LDTR* and STTR* as LDR/STR when NV, NV1 is 1, 1

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FEAT_NV requires (per I_JKLJK) that when HCR_EL2.{NV,NV1} is {1,1} the
unprivileged-access instructions LDTR, STTR etc behave as normal
loads and stores. Implement the check that handles this.

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 14:43:51 +00:00
parent f11440b426
commit 2e9b1e50bd
1 changed files with 4 additions and 2 deletions
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6
target/arm/tcg/hflags.c
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@ -261,8 +261,10 @@ static CPUARMTBFlags rebuild_hflags_a64(CPUARMState *env, int el, int fp_el,
switch (mmu_idx) {
case ARMMMUIdx_E10_1:
case ARMMMUIdx_E10_1_PAN:
/* TODO: ARMv8.3-NV */
DP_TBFLAG_A64(flags, UNPRIV, 1);
/* FEAT_NV: NV,NV1 == 1,1 means we don't do UNPRIV accesses */
if ((hcr & (HCR_NV | HCR_NV1)) != (HCR_NV | HCR_NV1)) {
DP_TBFLAG_A64(flags, UNPRIV, 1);
}
break;
case ARMMMUIdx_E20_2:
case ARMMMUIdx_E20_2_PAN: