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target/arm: Fix reported EL for mte_check_fail

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The reporting in AArch64.TagCheckFail only depends on PSTATE.EL,
and not the AccType of the operation. There are two guest
visible problems that affect LDTR and STTR because of this:

(1) Selecting TCF0 vs TCF1 to decide on reporting,
(2) Report "data abort same el" not "data abort lower el".

Backports 50244cc76abcac3296cff3d84826f5ff71808c80
This commit is contained in:
Richard Henderson 2021-03-01 20:10:40 -05:00 committed by Lioncash
parent 511636a3f4
commit 4f00eacb11
1 changed files with 3 additions and 7 deletions
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10
qemu/target/arm/mte_helper.c
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@ -501,14 +501,10 @@ static void mte_check_fail(CPUARMState *env, uint32_t desc,
reg_el = regime_el(env, arm_mmu_idx);
sctlr = env->cp15.sctlr_el[reg_el];
switch (arm_mmu_idx) {
case ARMMMUIdx_E10_0:
case ARMMMUIdx_E20_0:
el = 0;
el = arm_current_el(env);
if (el == 0) {
tcf = extract64(sctlr, 38, 2);
break;
default:
el = reg_el;
} else {
tcf = extract64(sctlr, 40, 2);
}