[PATCH v9 09/12] arm64: disable SCS for hypervisor code

Sami Tolvanen
2020-02-25T17:41:35Z

Disable SCS for code that runs at a different exception level by
adding __noscs to __hyp_text.

Suggested-by: James Morse <james.morse@arm.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/include/asm/kvm_hyp.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index a3a6a2ba9a63..0f0603f55ea0 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -13,7 +13,7 @@
#include <asm/kvm_mmu.h>
#include <asm/sysreg.h>

-#define __hyp_text __section(.hyp.text) notrace
+#define __hyp_text __section(.hyp.text) notrace __noscs

#define read_sysreg_elx(r,nvh,vh) \
({ \
--
2.25.0.265.gbab2e86ba0-goog