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KVM: arm64: Make kvm_at() take an OP_AT_*

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To allow using newer instructions that current assemblers don't know about,
replace the `at` instruction with the underlying SYS instruction.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Joey Gouly
2024-05-03 14:01:26 +01:00
committed by Marc Zyngier
parent 8400291e28
commit 69231a6fcb
2 changed files with 3 additions and 2 deletions
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3
arch/arm64/include/asm/kvm_asm.h
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@@ -10,6 +10,7 @@
#include <asm/hyp_image.h>
#include <asm/insn.h>
#include <asm/virt.h>
#include <asm/sysreg.h>
#define ARM_EXIT_WITH_SERROR_BIT 31
#define ARM_EXCEPTION_CODE(x) ((x) & ~(1U << ARM_EXIT_WITH_SERROR_BIT))
@@ -259,7 +260,7 @@ extern u64 __kvm_get_mdcr_el2(void);
asm volatile( \
" mrs %1, spsr_el2\n" \
" mrs %2, elr_el2\n" \
"1: at "at_op", %3\n" \
"1: " __msr_s(at_op, "%3") "\n" \
" isb\n" \
" b 9f\n" \
"2: msr spsr_el2, %1\n" \