From: Will Deacon <will@kernel.org>
To: kvmarm@lists.linux.dev
Cc: "Will Deacon" <will@kernel.org>,
"Sean Christopherson" <seanjc@google.com>,
"Vincent Donnefort" <vdonnefort@google.com>,
"Alexandru Elisei" <alexandru.elisei@arm.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
"James Morse" <james.morse@arm.com>,
"Chao Peng" <chao.p.peng@linux.intel.com>,
"Quentin Perret" <qperret@google.com>,
"Suzuki K Poulose" <suzuki.poulose@arm.com>,
"Mark Rutland" <mark.rutland@arm.com>,
"Fuad Tabba" <tabba@google.com>,
"Oliver Upton" <oliver.upton@linux.dev>,
"Marc Zyngier" <maz@kernel.org>,
kernel-team@android.com, kvm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 23/25] KVM: arm64: Explicitly map 'kvm_vgic_global_state' at EL2
Date: Thu, 20 Oct 2022 14:38:25 +0100 [thread overview]
Message-ID: <20221020133827.5541-24-will@kernel.org> (raw)
In-Reply-To: <20221020133827.5541-1-will@kernel.org>
From: Quentin Perret <qperret@google.com>
The pkvm hypervisor at EL2 may need to read the 'kvm_vgic_global_state'
variable from the host, for example when saving and restoring the state
of the virtual GIC.
Explicitly map 'kvm_vgic_global_state' in the stage-1 page-table of the
pKVM hypervisor rather than relying on mapping all of the host '.rodata'
section.
Tested-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
---
arch/arm64/kvm/hyp/nvhe/setup.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm64/kvm/hyp/nvhe/setup.c b/arch/arm64/kvm/hyp/nvhe/setup.c
index 0f69c1393416..5a371ab236db 100644
--- a/arch/arm64/kvm/hyp/nvhe/setup.c
+++ b/arch/arm64/kvm/hyp/nvhe/setup.c
@@ -161,6 +161,11 @@ static int recreate_hyp_mappings(phys_addr_t phys, unsigned long size,
if (ret)
return ret;
+ ret = pkvm_create_mappings(&kvm_vgic_global_state,
+ &kvm_vgic_global_state + 1, prot);
+ if (ret)
+ return ret;
+
return 0;
}
--
2.38.0.413.g74048e4d9e-goog
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next prev parent reply other threads:[~2022-10-20 14:09 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-20 13:38 [PATCH v5 00/25] KVM: arm64: Introduce pKVM hyp VM and vCPU state at EL2 Will Deacon
2022-10-20 13:38 ` [PATCH v5 01/25] KVM: arm64: Move hyp refcount manipulation helpers to common header file Will Deacon
2022-10-20 13:38 ` [PATCH v5 02/25] KVM: arm64: Allow attaching of non-coalescable pages to a hyp pool Will Deacon
2022-10-28 0:17 ` Oliver Upton
2022-10-28 8:09 ` Oliver Upton
2022-10-28 9:29 ` Quentin Perret
2022-10-28 9:28 ` Quentin Perret
2022-10-20 13:38 ` [PATCH v5 03/25] KVM: arm64: Back the hypervisor 'struct hyp_page' array for all memory Will Deacon
2022-10-20 13:38 ` [PATCH v5 04/25] KVM: arm64: Fix-up hyp stage-1 refcounts for all pages mapped at EL2 Will Deacon
2022-10-28 0:31 ` Oliver Upton
2022-10-20 13:38 ` [PATCH v5 05/25] KVM: arm64: Unify identifiers used to distinguish host and hypervisor Will Deacon
2022-10-28 0:32 ` Oliver Upton
2022-10-20 13:38 ` [PATCH v5 06/25] KVM: arm64: Implement do_donate() helper for donating memory Will Deacon
2022-10-28 7:52 ` Oliver Upton
2022-10-28 10:01 ` Quentin Perret
2022-10-20 13:38 ` [PATCH v5 07/25] KVM: arm64: Prevent the donation of no-map pages Will Deacon
2022-10-20 13:38 ` [PATCH v5 08/25] KVM: arm64: Add helpers to pin memory shared with the hypervisor at EL2 Will Deacon
2022-10-20 13:38 ` [PATCH v5 09/25] KVM: arm64: Include asm/kvm_mmu.h in nvhe/mem_protect.h Will Deacon
2022-10-20 13:38 ` [PATCH v5 10/25] KVM: arm64: Add hyp_spinlock_t static initializer Will Deacon
2022-10-20 13:38 ` [PATCH v5 11/25] KVM: arm64: Rename 'host_kvm' to 'host_mmu' Will Deacon
2022-10-20 13:38 ` [PATCH v5 12/25] KVM: arm64: Add infrastructure to create and track pKVM instances at EL2 Will Deacon
2022-10-20 13:38 ` [PATCH v5 13/25] KVM: arm64: Instantiate pKVM hypervisor VM and vCPU structures from EL1 Will Deacon
2022-10-20 13:38 ` [PATCH v5 14/25] KVM: arm64: Add per-cpu fixmap infrastructure at EL2 Will Deacon
2022-10-20 13:38 ` [PATCH v5 15/25] KVM: arm64: Initialise hypervisor copies of host symbols unconditionally Will Deacon
2022-10-20 13:38 ` [PATCH v5 16/25] KVM: arm64: Provide I-cache invalidation by virtual address at EL2 Will Deacon
2022-10-20 13:38 ` [PATCH v5 17/25] KVM: arm64: Add generic hyp_memcache helpers Will Deacon
2022-10-20 13:38 ` [PATCH v5 18/25] KVM: arm64: Consolidate stage-2 initialisation into a single function Will Deacon
2022-10-20 13:38 ` [PATCH v5 19/25] KVM: arm64: Instantiate guest stage-2 page-tables at EL2 Will Deacon
2022-10-20 13:38 ` [PATCH v5 20/25] KVM: arm64: Return guest memory from EL2 via dedicated teardown memcache Will Deacon
2022-10-27 13:13 ` Quentin Perret
2022-10-20 13:38 ` [PATCH v5 21/25] KVM: arm64: Unmap 'kvm_arm_hyp_percpu_base' from the host Will Deacon
2022-10-20 13:38 ` [PATCH v5 22/25] KVM: arm64: Maintain a copy of 'kvm_arm_vmid_bits' at EL2 Will Deacon
2022-10-20 13:38 ` Will Deacon [this message]
2022-10-20 13:38 ` [PATCH v5 24/25] KVM: arm64: Don't unnecessarily map host kernel sections " Will Deacon
2022-10-20 13:38 ` [RFC PATCH v5 25/25] KVM: arm64: Use the pKVM hyp vCPU structure in handle___kvm_vcpu_run() Will Deacon
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