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

From
Sami Tolvanen <samitolvanen@google.com>
Date
2020-02-25 17:40:19
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Sami Tolvanen, 2020-02-25
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


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Thread (429 messages) 429 messages, 18 authors, last reply 2020-05-15
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