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target/arm: Fill in the WnR syndrome bit in mte_check_fail

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According to AArch64.TagCheckFault, none of the other ISS values are
provided, so we do not need to go so far as merge_syn_data_abort.
But we were missing the WnR bit.

Backports commit 9a4670be7f0734d27bf4058db3becf83cd0cc9d5 from qemu
This commit is contained in:
Richard Henderson 2021-02-26 12:26:13 -05:00 committed by Lioncash
parent 6969435fb8
commit 6f341e0199
1 changed files with 4 additions and 4 deletions
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8
qemu/target/arm/mte_helper.c
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@ -495,7 +495,7 @@ static void mte_check_fail(CPUARMState *env, uint32_t desc,
{
int mmu_idx = FIELD_EX32(desc, MTEDESC, MIDX);
ARMMMUIdx arm_mmu_idx = core_to_aa64_mmu_idx(mmu_idx);
int el, reg_el, tcf, select;
int el, reg_el, tcf, select, is_write, syn;
uint64_t sctlr;
reg_el = regime_el(env, arm_mmu_idx);
@ -523,9 +523,9 @@ static void mte_check_fail(CPUARMState *env, uint32_t desc,
*/
cpu_restore_state(env_cpu(env), ra, true);
env->exception.vaddress = dirty_ptr;
raise_exception(env, EXCP_DATA_ABORT,
syn_data_abort_no_iss(el != 0, 0, 0, 0, 0, 0, 0x11),
exception_target_el(env));
is_write = FIELD_EX32(desc, MTEDESC, WRITE);
syn = syn_data_abort_no_iss(el != 0, 0, 0, 0, 0, is_write, 0x11);
raise_exception(env, EXCP_DATA_ABORT, syn, exception_target_el(env));
/* noreturn, but fall through to the assert anyway */
case 0: