Commit 96547368 authored Apr 27, 2020 by Sami Tolvanen Committed by Will Deacon May 15, 2020

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>

parent cde5dec8

arch/arm64/include/asm/kvm_hyp.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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) \
		({ \