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target/arm: Implement FEAT_PAN3

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FEAT_PAN3 adds an EPAN bit to SCTLR_EL1 and SCTLR_EL2, which allows
the PAN bit to make memory non-privileged-read/write if it is
user-executable as well as if it is user-read/write.

Implement this feature and enable it in the AArch64 'max' CPU.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230331145045.2584941-4-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2023-04-20 10:21:16 +01:00
parent a3856808d9
commit dd17143fce
4 changed files with 20 additions and 2 deletions
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5
target/arm/cpu.h
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@ -3823,6 +3823,11 @@ static inline bool isar_feature_aa64_ats1e1(const ARMISARegisters *id)
return FIELD_EX64(id->id_aa64mmfr1, ID_AA64MMFR1, PAN) >= 2;
}
static inline bool isar_feature_aa64_pan3(const ARMISARegisters *id)
{
return FIELD_EX64(id->id_aa64mmfr1, ID_AA64MMFR1, PAN) >= 3;
}
static inline bool isar_feature_aa64_hcx(const ARMISARegisters *id)
{
return FIELD_EX64(id->id_aa64mmfr1, ID_AA64MMFR1, HCX) != 0;