From: Marc Zyngier <maz@kernel.org>
To: <kvmarm@lists.cs.columbia.edu>, <kvmarm@lists.linux.dev>,
kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: Will Deacon <will@kernel.org>
Subject: [PATCH 10/17] KVM: arm64: Force HCR_EL2.E2H when ARM64_KVM_HVHE is set
Date: Thu, 20 Oct 2022 10:07:20 +0100 [thread overview]
Message-ID: <20221020090727.3669908-11-maz@kernel.org> (raw)
In-Reply-To: <20221020090727.3669908-1-maz@kernel.org>
Obviously, in order to be able to use VHE whilst at EL2, we need
to set HCR_EL2.E2H. Do so when ARM64_KVM_HVHE is set.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kvm/arm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 94d33e296e10..85df7ce0b051 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1558,6 +1558,8 @@ static void cpu_prepare_hyp_mode(int cpu)
params->hcr_el2 = HCR_HOST_NVHE_PROTECTED_FLAGS;
else
params->hcr_el2 = HCR_HOST_NVHE_FLAGS;
+ if (cpus_have_final_cap(ARM64_KVM_HVHE))
+ params->hcr_el2 |= HCR_E2H;
params->vttbr = params->vtcr = 0;
/*
--
2.34.1
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kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <maz@kernel.org>
To: <kvmarm@lists.cs.columbia.edu>, <kvmarm@lists.linux.dev>,
kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Oliver Upton <oliver.upton@linux.dev>,
Quentin Perret <qperret@google.com>,
Will Deacon <will@kernel.org>, Fuad Tabba <tabba@google.com>
Subject: [PATCH 10/17] KVM: arm64: Force HCR_EL2.E2H when ARM64_KVM_HVHE is set
Date: Thu, 20 Oct 2022 10:07:20 +0100 [thread overview]
Message-ID: <20221020090727.3669908-11-maz@kernel.org> (raw)
Message-ID: <20221020090720.MSsqd0R1RhJXYgc7X0wj0uHvJ-Wt_12S3_1j4BcLKB8@z> (raw)
In-Reply-To: <20221020090727.3669908-1-maz@kernel.org>
Obviously, in order to be able to use VHE whilst at EL2, we need
to set HCR_EL2.E2H. Do so when ARM64_KVM_HVHE is set.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kvm/arm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 94d33e296e10..85df7ce0b051 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1558,6 +1558,8 @@ static void cpu_prepare_hyp_mode(int cpu)
params->hcr_el2 = HCR_HOST_NVHE_PROTECTED_FLAGS;
else
params->hcr_el2 = HCR_HOST_NVHE_FLAGS;
+ if (cpus_have_final_cap(ARM64_KVM_HVHE))
+ params->hcr_el2 |= HCR_E2H;
params->vttbr = params->vtcr = 0;
/*
--
2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <maz@kernel.org>
To: <kvmarm@lists.cs.columbia.edu>, <kvmarm@lists.linux.dev>,
kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Oliver Upton <oliver.upton@linux.dev>,
Quentin Perret <qperret@google.com>,
Will Deacon <will@kernel.org>, Fuad Tabba <tabba@google.com>
Subject: [PATCH 10/17] KVM: arm64: Force HCR_EL2.E2H when ARM64_KVM_HVHE is set
Date: Thu, 20 Oct 2022 10:07:20 +0100 [thread overview]
Message-ID: <20221020090727.3669908-11-maz@kernel.org> (raw)
In-Reply-To: <20221020090727.3669908-1-maz@kernel.org>
Obviously, in order to be able to use VHE whilst at EL2, we need
to set HCR_EL2.E2H. Do so when ARM64_KVM_HVHE is set.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kvm/arm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 94d33e296e10..85df7ce0b051 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1558,6 +1558,8 @@ static void cpu_prepare_hyp_mode(int cpu)
params->hcr_el2 = HCR_HOST_NVHE_PROTECTED_FLAGS;
else
params->hcr_el2 = HCR_HOST_NVHE_FLAGS;
+ if (cpus_have_final_cap(ARM64_KVM_HVHE))
+ params->hcr_el2 |= HCR_E2H;
params->vttbr = params->vtcr = 0;
/*
--
2.34.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-10-20 9:16 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-20 9:07 [PATCH 00/17] KVM: arm64: Allow using VHE in the nVHE hypervisor Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 01/17] arm64: Turn kaslr_feature_override into a generic SW feature override Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 02/17] arm64: Add KVM_HVHE capability and has_hvhe() predicate Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2023-06-01 7:01 ` Oliver Upton
2023-06-01 7:01 ` Oliver Upton
2022-10-20 9:07 ` [PATCH 03/17] arm64: Don't enable VHE for the kernel if OVERRIDE_HVHE is set Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 04/17] arm64: Prevent the use of is_kernel_in_hyp_mode() in hypervisor code Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 05/17] arm64: Allow EL1 physical timer access when running VHE Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 06/17] arm64: Use CPACR_EL1 format to set CPTR_EL2 when E2H is set Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 07/17] KVM: arm64: Elide kern_hyp_va() in VHE-specific parts of the hypervisor Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 08/17] KVM: arm64: Remove alternatives from sysreg accessors in VHE hypervisor context Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 09/17] KVM: arm64: Key use of VHE instructions in nVHE code off ARM64_KVM_HVHE Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier [this message]
2022-10-20 9:07 ` [PATCH 10/17] KVM: arm64: Force HCR_EL2.E2H when ARM64_KVM_HVHE is set Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 11/17] KVM: arm64: Disable TTBR1_EL2 when using ARM64_KVM_HVHE Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 12/17] KVM: arm64: Adjust EL2 stage-1 leaf AP bits when ARM64_KVM_HVHE is set Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 13/17] KVM: arm64: Rework CPTR_EL2 programming for HVHE configuration Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 14/17] KVM: arm64: Program the timer traps with VHE layout in hVHE mode Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 15/17] KVM: arm64: Force HCR_E2H in guest context when ARM64_KVM_HVHE is set Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 16/17] arm64: Allow arm64_sw.hvhe on command line Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` [PATCH 17/17] KVM: arm64: Terrible timer hack for M1 with hVHE Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
2022-10-20 9:07 ` Marc Zyngier
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