[PULL 3/6] target/arm: Take VSTCR.SW, VTCR.NSW into account in final stage 2 walk

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

From: Idan Horowitz <idan.horowitz@gmail.com>

As per the AArch64.SS2InitialTTWState() psuedo-code in the ARMv8 ARM the
initial PA space used for stage 2 table walks is assigned based on the SW
and NSW bits of the VSTCR and VTCR registers.
This was already implemented for the recursive stage 2 page table walks
in S1_ptw_translate(), but was missing for the final stage 2 walk.

Signed-off-by: Idan Horowitz <idan.horowitz@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220327093427.1548629-3-idan.horowitz@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index a65b39625db..6fd5c27340e 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -12657,6 +12657,16 @@ bool get_phys_addr(CPUARMState *env, target_ulong address,
                 return ret;
             }
 
+            if (arm_is_secure_below_el3(env)) {
+                if (attrs->secure) {
+                    attrs->secure = !(env->cp15.vstcr_el2.raw_tcr & VSTCR_SW);
+                } else {
+                    attrs->secure = !(env->cp15.vtcr_el2.raw_tcr & VTCR_NSW);
+                }
+            } else {
+                assert(!attrs->secure);
+            }
+
             s2_mmu_idx = attrs->secure ? ARMMMUIdx_Stage2_S : ARMMMUIdx_Stage2;
             is_el0 = mmu_idx == ARMMMUIdx_E10_0 || mmu_idx == ARMMMUIdx_SE10_0;
 
-- 
2.25.1