| Message ID | 20240821153844.60084-23-steven.price@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show
Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 1430E1C1722; Wed, 21 Aug 2024 15:40:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724254830; cv=none; b=mpUgLHll00nCnshRM3XNACP9/YYXorBkRg0FUDP53XIUDCa2oD2PmoQNfFbr0nPInHf612YpDwTGIAyC71VP/M0OJBgvN2vqNM1wKSn0ofoRd8Z4akdQo94nfGty8uMY5UgCBPfxy7nq60Z7L3fSYivtpp1HNNb7CwVAPo8AmMw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724254830; c=relaxed/simple; bh=VKTX20/DWJL8bSS/GZFUG1s9Isg860Khqxtuwke3xLo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=BAbcUkn9vt4LHZB7L2KtfjDlosbNYLfHyFmOnr8oVPGR70Wx/7OhNGKf7bQy2qWs6MNpsnCxEO8t+h0/6KIpMUuED3U/B6u9+gYlov49N9TZUw7xO9TYXZgQk0COFpLNK/k4pKP+sIvHxTbHL7kMcjKUB6XzpfaU+42wlkxAFGQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C76EFDA7; Wed, 21 Aug 2024 08:40:53 -0700 (PDT) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.37.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 96F253F73B; Wed, 21 Aug 2024 08:40:24 -0700 (PDT) From: Steven Price <steven.price@arm.com> To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Steven Price <steven.price@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>, James Morse <james.morse@arm.com>, Oliver Upton <oliver.upton@linux.dev>, Suzuki K Poulose <suzuki.poulose@arm.com>, Zenghui Yu <yuzenghui@huawei.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly <joey.gouly@arm.com>, Alexandru Elisei <alexandru.elisei@arm.com>, Christoffer Dall <christoffer.dall@arm.com>, Fuad Tabba <tabba@google.com>, linux-coco@lists.linux.dev, Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>, Gavin Shan <gshan@redhat.com>, Shanker Donthineni <sdonthineni@nvidia.com>, Alper Gun <alpergun@google.com> Subject: [PATCH v4 22/43] KVM: arm64: Handle realm VCPU load Date: Wed, 21 Aug 2024 16:38:23 +0100 Message-Id: <20240821153844.60084-23-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240821153844.60084-1-steven.price@arm.com> References: <20240821153844.60084-1-steven.price@arm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: <kvm.vger.kernel.org> List-Subscribe: <mailto:kvm+subscribe@vger.kernel.org> List-Unsubscribe: <mailto:kvm+unsubscribe@vger.kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit |
| Series |
arm64: Support for Arm CCA in KVM
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expand
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diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index e8dabb996705..3d21659ae5ad 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -662,10 +662,6 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) kvm_vgic_load(vcpu); kvm_timer_vcpu_load(vcpu); - if (has_vhe()) - kvm_vcpu_load_vhe(vcpu); - kvm_arch_vcpu_load_fp(vcpu); - kvm_vcpu_pmu_restore_guest(vcpu); if (kvm_arm_is_pvtime_enabled(&vcpu->arch)) kvm_make_request(KVM_REQ_RECORD_STEAL, vcpu); @@ -681,6 +677,15 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) vcpu_set_pauth_traps(vcpu); + /* No additional state needs to be loaded on Realmed VMs */ + if (vcpu_is_rec(vcpu)) + return; + + if (has_vhe()) + kvm_vcpu_load_vhe(vcpu); + kvm_arch_vcpu_load_fp(vcpu); + kvm_vcpu_pmu_restore_guest(vcpu); + kvm_arch_vcpu_load_debug_state_flags(vcpu); if (!cpumask_test_cpu(cpu, vcpu->kvm->arch.supported_cpus))
When loading a realm VCPU much of the work is handled by the RMM so only some of the actions are required. Rearrange kvm_arch_vcpu_load() slightly so we can bail out early for a realm guest. Signed-off-by: Steven Price <steven.price@arm.com> --- arch/arm64/kvm/arm.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-)