From 4eb276408363aef5435a72a8e818f24220b5edd0 Mon Sep 17 00:00:00 2001
From: Greg Bellows <greg.bellows@linaro.org>
Date: Sun, 26 Apr 2015 16:49:26 +0100
Subject: [PATCH] Allow ARMv8 SCR.SMD updates
Updated scr_write to always allow updates to the SCR.SMD bit on ARMv8
regardless of whether virtualization (EL2) is enabled or not.
Signed-off-by: Greg Bellows <greg.bellows@linaro.org>
Message-id: 1429888797-4378-1-git-send-email-greg.bellows@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
target-arm/helper.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/target-arm/helper.c b/target-arm/helper.c
index 0ac6ff15fb..f8f8d76fc0 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -816,8 +816,10 @@ static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
* supported if EL2 exists. The bit is UNK/SBZP when
* EL2 is unavailable. In QEMU ARMv7, we force it to always zero
* when EL2 is unavailable.
+ * On ARMv8, this bit is always available.
*/
- if (arm_feature(env, ARM_FEATURE_V7)) {
+ if (arm_feature(env, ARM_FEATURE_V7) &&
+ !arm_feature(env, ARM_FEATURE_V8)) {
valid_mask &= ~SCR_SMD;
}
}
--
2.30.2