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[Stable-7.2.17,06/27] target/arm: Report correct syndrome for UNDEFINED S1E2 AT ops at EL3

Message ID 20250315091439.657371-6-mjt@tls.msk.ru
State New
Headers show
Series None | expand

Commit Message

Michael Tokarev March 15, 2025, 9:14 a.m. UTC 
From: Peter Maydell <peter.maydell@linaro.org>

The pseudocode for AT S1E2R and AT S1E2W says that they should be
UNDEFINED if executed at EL3 when EL2 is not enabled. We were
incorrectly using CP_ACCESS_TRAP and reporting the wrong exception
syndrome as a result. Use CP_ACCESS_TRAP_UNCATEGORIZED.

Cc: qemu-stable@nongnu.org
Fixes: 2a47df953202e1 ("target-arm: Wire up AArch64 EL2 and EL3 address translation ops")
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250130182309.717346-4-peter.maydell@linaro.org
(cherry picked from commit ccda792945d650bce4609c8dbce8814a220df1bb)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
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Patch

diff --git a/target/arm/helper.c b/target/arm/helper.c
index d1e176e711..f33fc5c4a6 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -3516,7 +3516,7 @@  static CPAccessResult at_s1e2_access(CPUARMState *env, const ARMCPRegInfo *ri,
 {
     if (arm_current_el(env) == 3 &&
         !(env->cp15.scr_el3 & (SCR_NS | SCR_EEL2))) {
-        return CP_ACCESS_TRAP;
+        return CP_ACCESS_TRAP_UNCATEGORIZED;
     }
     return CP_ACCESS_OK;
 }