diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-09-26 19:02:56 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-16 08:21:50 +0200 |
| commit | b0d9043bdbe693319b4eaa2523003654bf6e200e (patch) | |
| tree | 0d91c0f48f073fb2cd9e24ba4aa574a778099961 /arch/x86/include/asm | |
| parent | f031fd03e22e2193f996c6050aacca675e33d2fc (diff) | |
| download | linux-rt-b0d9043bdbe693319b4eaa2523003654bf6e200e.tar.gz | |
KVM: x86: hyperv: keep track of mismatched VP indexes
[ Upstream commit 87ee613d076351950b74383215437f841ebbeb75 ]
In most common cases VP index of a vcpu matches its vcpu index. Userspace
is, however, free to set any mapping it wishes and we need to account for
that when we need to find a vCPU with a particular VP index. To keep search
algorithms optimal in both cases introduce 'num_mismatched_vp_indexes'
counter showing how many vCPUs with mismatching VP index we have. In case
the counter is zero we can assume vp_index == vcpu_idx.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 3245b95ad2d9..b6417454a9d7 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -784,6 +784,9 @@ struct kvm_hv { u64 hv_reenlightenment_control; u64 hv_tsc_emulation_control; u64 hv_tsc_emulation_status; + + /* How many vCPUs have VP index != vCPU index */ + atomic_t num_mismatched_vp_indexes; }; enum kvm_irqchip_mode { |