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| author | Marc Zyngier <maz@kernel.org> | 2023-09-27 12:09:09 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2023-09-30 21:15:44 +0300 |
| commit | 54a8006d0b49044d0cb682119686a45de906fe3c (patch) | |
| tree | df52cec701dec900fee31abf4fb865a07b22d810 /arch/arm64/kvm/arm.c | |
| parent | 5544750efd51143fee9e9184d69518c0c05426a1 (diff) | |
| download | linux-54a8006d0b49044d0cb682119686a45de906fe3c.tar.xz | |
KVM: arm64: Fast-track kvm_mpidr_to_vcpu() when mpidr_data is available
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>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.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>
Link: https://lore.kernel.org/r/20230927090911.3355209-10-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/kvm/arm.c')
| -rw-r--r-- | arch/arm64/kvm/arm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index b02e28f76083..e3d667feecaf 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -2388,6 +2388,18 @@ 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; |