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arm64: Disable SCS for hypervisor code 

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>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Sami Tolvanen 2020-04-27 09:00:15 -07:00 committed by Will Deacon
parent cde5dec89e
commit 9654736891
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/include/asm/kvm_hyp.h
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@ -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) \
({ \