[PATCH v2 05/11] arm64: mops: don't disable host MOPS instructions from EL2

Kristina Martsenko
2023-05-09T14:23:43Z

To allow nVHE host EL0 and EL1 to use FEAT_MOPS instructions, configure
EL2 to not cause these instructions to be treated as UNDEFINED. A VHE
host is unaffected by this control.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
---
arch/arm64/include/asm/kvm_arm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
index 7bb2fbddda54..d2d4f4cd12b8 100644
--- a/arch/arm64/include/asm/kvm_arm.h
+++ b/arch/arm64/include/asm/kvm_arm.h
@@ -94,7 +94,7 @@
#define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H)

#define HCRX_GUEST_FLAGS (HCRX_EL2_SMPME)
-#define HCRX_HOST_FLAGS 0
+#define HCRX_HOST_FLAGS (HCRX_EL2_MSCEn)

/* TCR_EL2 Registers bits */
#define TCR_EL2_RES1 ((1U << 31) | (1 << 23))
--
2.25.1