From: Peter Maydell <peter.maydell@linaro.org>
Date: Tue, 9 Jan 2024 14:43:50 +0000 (+0000)
Subject: target/arm: Don't honour PSTATE.PAN when HCR_EL2.{NV, NV1} == {1, 1}
X-Git-Tag: v9.0.0-rc0~112^2~17
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f11440b4261fd5db888c300936c0c4537543aed6;p=thirdparty%2Fqemu.git

target/arm: Don't honour PSTATE.PAN when HCR_EL2.{NV, NV1} == {1, 1}

For FEAT_NV, when HCR_EL2.{NV,NV1} is {1,1} PAN is always disabled
even when the PSTATE.PAN bit is set. Implement this by having
arm_pan_enabled() return false in this situation.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Miguel Luis <miguel.luis@oracle.com>
---

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 1db2effb1c0..24751e05b24 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -266,6 +266,9 @@ void init_cpreg_list(ARMCPU *cpu)
 static bool arm_pan_enabled(CPUARMState *env)
 {
     if (is_a64(env)) {
+        if ((arm_hcr_el2_eff(env) & (HCR_NV | HCR_NV1)) == (HCR_NV | HCR_NV1)) {
+            return false;
+        }
         return env->pstate & PSTATE_PAN;
     } else {
         return env->uncached_cpsr & CPSR_PAN;