KVM: X86: TSCDEADLINE MSR emulation fastpath

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This patch implements a fast path for emulation of writes to the TSCDEADLINE
MSR.  Besides shortcutting various housekeeping tasks in the vCPU loop,
the fast path can also deliver the timer interrupt directly without going
through KVM_REQ_PENDING_TIMER because it runs in vCPU context.

Tested-by: Haiwei Li <lihaiwei@tencent.com>
Cc: Haiwei Li <lihaiwei@tencent.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1588055009-12677-7-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Wanpeng Li 2020-04-28 14:23:28 +08:00 • committed by Paolo Bonzini

parent 199a8b84c4

commit ae95f566b3

2 changed files with 28 additions and 6 deletions

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18

arch/x86/kvm/lapic.c

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16

arch/x86/kvm/x86.c

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