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 <[email protected]>
Signed-off-by: Sami Tolvanen <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Acked-by: Marc Zyngier <[email protected]>
Signed-off-by: Will Deacon <[email protected]>

Author: samitolvanen

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)					\
 	({								\