From: Marc Zyngier <maz@kernel.org>
To: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
Cc: kernel-team@android.com, Dave Martin <Dave.Martin@arm.com>
Subject: [PATCH v2 1/5] KVM: arm64: Enable Address Authentication at EL2 if available
Date: Mon, 22 Jun 2020 09:06:39 +0100 [thread overview]
Message-ID: <20200622080643.171651-2-maz@kernel.org> (raw)
In-Reply-To: <20200622080643.171651-1-maz@kernel.org>
While initializing EL2, enable Address Authentication if detected
from EL1. We still use the EL1-provided keys though.
Acked-by: Andrew Scull <ascull@google.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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next prev parent reply other threads:[~2020-06-22 8:07 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-22 8:06 [PATCH v2 0/5] KVM/arm64: Enable PtrAuth on non-VHE KVM Marc Zyngier
2020-06-22 8:06 ` Marc Zyngier [this message]
2020-06-22 9:04 ` [PATCH v2 1/5] KVM: arm64: Enable Address Authentication at EL2 if available Mark Rutland
2020-06-22 8:06 ` [PATCH v2 2/5] KVM: arm64: Allow ARM64_PTR_AUTH when ARM64_VHE=n Marc Zyngier
2020-06-22 8:06 ` [PATCH v2 3/5] KVM: arm64: Allow PtrAuth to be enabled from userspace on non-VHE systems Marc Zyngier
2020-06-22 8:06 ` [PATCH v2 4/5] KVM: arm64: Check HCR_EL2 instead of shadow copy to swap PtrAuth registers Marc Zyngier
2020-06-22 8:06 ` [PATCH v2 5/5] KVM: arm64: Simplify PtrAuth alternative patching Marc Zyngier
2020-06-22 9:15 ` Mark Rutland
2020-06-22 10:25 ` Marc Zyngier
2020-06-22 10:31 ` Mark Rutland
2020-06-22 10:39 ` Andrew Scull
2020-06-22 10:43 ` Andrew Scull
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