From: Will Deacon <will@kernel.org>
To: kvmarm@lists.cs.columbia.edu
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>,
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 v3 23/25] KVM: arm64: Explicitly map 'kvm_vgic_global_state' at EL2
Date: Wed, 14 Sep 2022 09:34:58 +0100 [thread overview]
Message-ID: <20220914083500.5118-24-will@kernel.org> (raw)
In-Reply-To: <20220914083500.5118-1-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.
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;
}
--
2.37.2.789.g6183377224-goog
next prev parent reply other threads:[~2022-09-14 8:36 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-14 8:34 [PATCH v3 00/25] KVM: arm64: Introduce pKVM hyp VM and vCPU state at EL2 Will Deacon
2022-09-14 8:34 ` [PATCH v3 01/25] KVM: arm64: Move hyp refcount manipulation helpers to common header file Will Deacon
2022-09-15 8:35 ` Oliver Upton
2022-09-14 8:34 ` [PATCH v3 02/25] KVM: arm64: Allow attaching of non-coalescable pages to a hyp pool Will Deacon
2022-09-14 8:34 ` [PATCH v3 03/25] KVM: arm64: Back the hypervisor 'struct hyp_page' array for all memory Will Deacon
2022-09-14 8:34 ` [PATCH v3 04/25] KVM: arm64: Fix-up hyp stage-1 refcounts for all pages mapped at EL2 Will Deacon
2022-09-14 8:34 ` [PATCH v3 05/25] KVM: arm64: Unify identifiers used to distinguish host and hypervisor Will Deacon
2022-09-14 8:34 ` [PATCH v3 06/25] KVM: arm64: Implement do_donate() helper for donating memory Will Deacon
2022-09-14 8:34 ` [PATCH v3 07/25] KVM: arm64: Prevent the donation of no-map pages Will Deacon
2022-09-14 8:34 ` [PATCH v3 08/25] KVM: arm64: Add helpers to pin memory shared with the hypervisor at EL2 Will Deacon
2022-09-14 8:34 ` [PATCH v3 09/25] KVM: arm64: Include asm/kvm_mmu.h in nvhe/mem_protect.h Will Deacon
2022-09-14 8:34 ` [PATCH v3 10/25] KVM: arm64: Add hyp_spinlock_t static initializer Will Deacon
2022-09-14 8:34 ` [PATCH v3 11/25] KVM: arm64: Rename 'host_kvm' to 'host_mmu' Will Deacon
2022-09-14 8:34 ` [PATCH v3 12/25] KVM: arm64: Add infrastructure to create and track pKVM instances at EL2 Will Deacon
2022-09-14 8:34 ` [PATCH v3 13/25] KVM: arm64: Instantiate pKVM hypervisor VM and vCPU structures from EL1 Will Deacon
2022-09-14 8:34 ` [PATCH v3 14/25] KVM: arm64: Add per-cpu fixmap infrastructure at EL2 Will Deacon
2022-09-14 8:34 ` [PATCH v3 15/25] KVM: arm64: Initialise hypervisor copies of host symbols unconditionally Will Deacon
2022-09-14 8:34 ` [PATCH v3 16/25] KVM: arm64: Provide I-cache invalidation by virtual address at EL2 Will Deacon
2022-09-14 8:34 ` [PATCH v3 17/25] KVM: arm64: Add generic hyp_memcache helpers Will Deacon
2022-09-14 8:34 ` [PATCH v3 18/25] KVM: arm64: Consolidate stage-2 initialisation into a single function Will Deacon
2022-09-14 8:34 ` [PATCH v3 19/25] KVM: arm64: Instantiate guest stage-2 page-tables at EL2 Will Deacon
2022-09-14 8:34 ` [PATCH v3 20/25] KVM: arm64: Return guest memory from EL2 via dedicated teardown memcache Will Deacon
2022-09-14 8:34 ` [PATCH v3 21/25] KVM: arm64: Unmap 'kvm_arm_hyp_percpu_base' from the host Will Deacon
2022-09-14 8:34 ` [PATCH v3 22/25] KVM: arm64: Maintain a copy of 'kvm_arm_vmid_bits' at EL2 Will Deacon
2022-09-14 8:34 ` Will Deacon [this message]
2022-09-14 8:34 ` [PATCH v3 24/25] KVM: arm64: Don't unnecessarily map host kernel sections " Will Deacon
2022-09-14 8:35 ` [RFC PATCH v3 25/25] KVM: arm64: Use the pKVM hyp vCPU structure in handle___kvm_vcpu_run() Will Deacon
2022-09-29 12:47 ` [PATCH v3 00/25] KVM: arm64: Introduce pKVM hyp VM and vCPU state at EL2 Vincent Donnefort
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220914083500.5118-24-will@kernel.org \
--to=will@kernel.org \
--cc=alexandru.elisei@arm.com \
--cc=catalin.marinas@arm.com \
--cc=chao.p.peng@linux.intel.com \
--cc=james.morse@arm.com \
--cc=kernel-team@android.com \
--cc=kvm@vger.kernel.org \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=mark.rutland@arm.com \
--cc=maz@kernel.org \
--cc=oliver.upton@linux.dev \
--cc=qperret@google.com \
--cc=seanjc@google.com \
--cc=suzuki.poulose@arm.com \
--cc=tabba@google.com \
--cc=vdonnefort@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).