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target/arm: Enable MTE for user-only 

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-31-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2021-02-12 10:49:01 -08:00 committed by Peter Maydell
parent a11d3830d9
commit e32328645e
1 changed files with 15 additions and 0 deletions
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15
target/arm/cpu.c
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@ -209,6 +209,21 @@ static void arm_cpu_reset(DeviceState *dev)
* Note that this must match useronly_clean_ptr.
*/
env->cp15.tcr_el[1].raw_tcr = (1ULL << 37);
/* Enable MTE */
if (cpu_isar_feature(aa64_mte, cpu)) {
/* Enable tag access, but leave TCF0 as No Effect (0). */
env->cp15.sctlr_el[1] |= SCTLR_ATA0;
/*
* Exclude all tags, so that tag 0 is always used.
* This corresponds to Linux current->thread.gcr_incl = 0.
*
* Set RRND, so that helper_irg() will generate a seed later.
* Here in cpu_reset(), the crypto subsystem has not yet been
* initialized.
*/
env->cp15.gcr_el1 = 0x1ffff;
}
#else
/* Reset into the highest available EL */
if (arm_feature(env, ARM_FEATURE_EL3)) {