From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
kvm@vger.kernel.org
Cc: James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Oliver Upton <oliver.upton@linux.dev>,
Zenghui Yu <yuzenghui@huawei.com>,
Joey Gouly <joey.gouly@arm.com>,
Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
Xu Zhao <zhaoxu.35@bytedance.com>,
Eric Auger <eric.auger@redhat.com>
Subject: [PATCH v2 09/11] KVM: arm64: Fast-track kvm_mpidr_to_vcpu() when mpidr_data is available
Date: Wed, 20 Sep 2023 19:17:29 +0100 [thread overview]
Message-ID: <20230920181731.2232453-10-maz@kernel.org> (raw)
In-Reply-To: <20230920181731.2232453-1-maz@kernel.org>
If our fancy little table is present when calling kvm_mpidr_to_vcpu(),
use it to recover the corresponding vcpu.
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Tested-by: Joey Gouly <joey.gouly@arm.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kvm/arm.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index d9de4d3a339c..28f3940fa724 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -2395,6 +2395,18 @@ struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr)
unsigned long i;
mpidr &= MPIDR_HWID_BITMASK;
+
+ if (kvm->arch.mpidr_data) {
+ u16 idx = kvm_mpidr_index(kvm->arch.mpidr_data, mpidr);
+
+ vcpu = kvm_get_vcpu(kvm,
+ kvm->arch.mpidr_data->cmpidr_to_idx[idx]);
+ if (mpidr != kvm_vcpu_get_mpidr_aff(vcpu))
+ vcpu = NULL;
+
+ return vcpu;
+ }
+
kvm_for_each_vcpu(i, vcpu, kvm) {
if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu))
return vcpu;
--
2.34.1
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next prev parent reply other threads:[~2023-09-20 18:18 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-20 18:17 [PATCH v2 00/11] KVM: arm64: Accelerate lookup of vcpus by MPIDR values (and other fixes) Marc Zyngier
2023-09-20 18:17 ` [PATCH v2 01/11] KVM: arm64: vgic: Make kvm_vgic_inject_irq() take a vcpu pointer Marc Zyngier
2023-09-21 9:11 ` Zenghui Yu
2023-09-21 11:20 ` Marc Zyngier
2023-09-20 18:17 ` [PATCH v2 02/11] KVM: arm64: vgic-its: Treat the collection target address as a vcpu_id Marc Zyngier
2023-09-21 9:14 ` Zenghui Yu
2023-09-21 11:46 ` Marc Zyngier
2023-09-21 13:12 ` Zenghui Yu
2023-09-20 18:17 ` [PATCH v2 03/11] KVM: arm64: vgic-v3: Refactor GICv3 SGI generation Marc Zyngier
2023-09-21 9:42 ` Joey Gouly
2023-09-21 11:13 ` Marc Zyngier
2023-09-20 18:17 ` [PATCH v2 04/11] KVM: arm64: vgic-v2: Use cpuid from userspace as vcpu_id Marc Zyngier
2023-09-20 18:17 ` [PATCH v2 05/11] KVM: arm64: vgic: Use vcpu_idx for the debug information Marc Zyngier
2023-09-20 18:17 ` [PATCH v2 06/11] KVM: arm64: Use vcpu_idx for invalidation tracking Marc Zyngier
2023-09-21 9:16 ` Zenghui Yu
2023-09-21 12:58 ` Marc Zyngier
2023-09-20 18:17 ` [PATCH v2 07/11] KVM: arm64: Simplify kvm_vcpu_get_mpidr_aff() Marc Zyngier
2023-09-20 18:17 ` [PATCH v2 08/11] KVM: arm64: Build MPIDR to vcpu index cache at runtime Marc Zyngier
2023-09-20 18:17 ` Marc Zyngier [this message]
2023-09-20 18:17 ` [PATCH v2 10/11] KVM: arm64: vgic-v3: Optimize affinity-based SGI injection Marc Zyngier
2023-09-21 9:32 ` Zenghui Yu
2023-09-20 18:17 ` [PATCH v2 11/11] KVM: arm64: Clarify the ordering requirements for vcpu/RD creation Marc Zyngier
2023-09-21 2:11 ` [PATCH v2 00/11] KVM: arm64: Accelerate lookup of vcpus by MPIDR values (and other fixes) Oliver Upton
2023-09-21 9:39 ` Zenghui Yu
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