[PULL 05/28] target/arm: Make the final stage1+2 write to secure be unconditional

[Peter Maydell <peter.maydell@linaro.org>]

From: Richard Henderson <richard.henderson@linaro.org>

While the stage2 call to get_phys_addr_lpae should never set
attrs.secure when given a non-secure input, it's just as easy
to make the final update to attrs.secure be unconditional and
false in the case of non-secure input.

Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20221007152159.1414065-1-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/ptw.c | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/target/arm/ptw.c b/target/arm/ptw.c
index b8c494ad9f0..7d763a58477 100644
--- a/target/arm/ptw.c
+++ b/target/arm/ptw.c
@@ -2365,17 +2365,16 @@ bool get_phys_addr(CPUARMState *env, target_ulong address,
             result->cacheattrs = combine_cacheattrs(env, cacheattrs1,
                                                     result->cacheattrs);
 
-            /* Check if IPA translates to secure or non-secure PA space. */
-            if (is_secure) {
-                if (ipa_secure) {
-                    result->attrs.secure =
-                        !(env->cp15.vstcr_el2 & (VSTCR_SA | VSTCR_SW));
-                } else {
-                    result->attrs.secure =
-                        !((env->cp15.vtcr_el2 & (VTCR_NSA | VTCR_NSW))
-                        || (env->cp15.vstcr_el2 & (VSTCR_SA | VSTCR_SW)));
-                }
-            }
+            /*
+             * Check if IPA translates to secure or non-secure PA space.
+             * Note that VSTCR overrides VTCR and {N}SW overrides {N}SA.
+             */
+            result->attrs.secure =
+                (is_secure
+                 && !(env->cp15.vstcr_el2 & (VSTCR_SA | VSTCR_SW))
+                 && (ipa_secure
+                     || !(env->cp15.vtcr_el2 & (VTCR_NSA | VTCR_NSW))));
+
             return 0;
         } else {
             /*
-- 
2.25.1