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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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WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <maz@kernel.org>
To: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu
Cc: James Morse <james.morse@arm.com>,
	Julien Thierry <julien.thierry.kdev@gmail.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Andrew Scull <ascull@google.com>,
	Dave Martin <Dave.Martin@arm.com>,
	kernel-team@android.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


  reply	other threads:[~2020-06-22  8:07 UTC|newest]

Thread overview: 24+ 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
2020-06-22  8:06 ` Marc Zyngier [this message]
2020-06-22  8:06   ` [PATCH v2 1/5] KVM: arm64: Enable Address Authentication at EL2 if available Marc Zyngier
2020-06-22  9:04   ` Mark Rutland
2020-06-22  9:04     ` 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   ` 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   ` 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   ` Marc Zyngier
2020-06-22  8:06 ` [PATCH v2 5/5] KVM: arm64: Simplify PtrAuth alternative patching Marc Zyngier
2020-06-22  8:06   ` Marc Zyngier
2020-06-22  9:15   ` Mark Rutland
2020-06-22  9:15     ` Mark Rutland
2020-06-22 10:25     ` Marc Zyngier
2020-06-22 10:25       ` Marc Zyngier
2020-06-22 10:31       ` Mark Rutland
2020-06-22 10:31         ` Mark Rutland
2020-06-22 10:39     ` Andrew Scull
2020-06-22 10:39       ` Andrew Scull
2020-06-22 10:43       ` Andrew Scull
2020-06-22 10:43         ` Andrew Scull

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