[PATCH 01/56] KVM: arm64: Enable Address Authentication at EL2 if available
From: Marc Zyngier <maz@kernel.org>
Date: 2020-08-05 17:58:47
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
While initializing EL2, enable Address Authentication if detected from EL1. We still use the EL1-provided keys though. Acked-by: Andrew Scull <redacted> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/kvm/hyp-init.S | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/arm64/kvm/hyp-init.S b/arch/arm64/kvm/hyp-init.S
index 6e6ed5581eed..1587d146726a 100644
--- a/arch/arm64/kvm/hyp-init.S
+++ b/arch/arm64/kvm/hyp-init.S@@ -104,6 +104,11 @@ alternative_else_nop_endif */ mov_q x4, (SCTLR_EL2_RES1 | (SCTLR_ELx_FLAGS & ~SCTLR_ELx_A)) CPU_BE( orr x4, x4, #SCTLR_ELx_EE) +alternative_if ARM64_HAS_ADDRESS_AUTH + mov_q x5, (SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | \ + SCTLR_ELx_ENDA | SCTLR_ELx_ENDB) + orr x4, x4, x5 +alternative_else_nop_endif msr sctlr_el2, x4 isb
--
2.27.0
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