shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-05 10:31:46 +09:00
Code Issues Packages Projects Releases Wiki Activity

KVM: x86: fire timer when it is migrated and expired, and in oneshot mode

Browse Source 
commit 8e6ed96cdd upstream.

when the vCPU was migrated, if its timer is expired, KVM _should_ fire
the timer ASAP, zeroing the deadline here will cause the timer to
immediately fire on the destination

Cc: Sean Christopherson <seanjc@google.com>
Cc: Peter Shier <pshier@google.com>
Cc: Jim Mattson <jmattson@google.com>
Cc: Wanpeng Li <wanpengli@tencent.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Link: https://lore.kernel.org/r/20230106040625.8404-1-lirongqing@baidu.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: David Hunter <david.hunter.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Li RongQing
2023-01-06 12:06:25 +08:00
committed by Greg Kroah-Hartman
parent 83065ded77
commit 77fa62cd9a
1 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
arch/x86/kvm/lapic.c
View File

@@ -1843,8 +1843,12 @@ static bool set_target_expiration(struct kvm_lapic *apic, u32 count_reg)
if (unlikely(count_reg != APIC_TMICT)) {
deadline = tmict_to_ns(apic,
kvm_lapic_get_reg(apic, count_reg));
if (unlikely(deadline <= 0))
deadline = apic->lapic_timer.period;
if (unlikely(deadline <= 0)) {
if (apic_lvtt_period(apic))
deadline = apic->lapic_timer.period;
else
deadline = 0;
}
else if (unlikely(deadline > apic->lapic_timer.period)) {
pr_info_ratelimited(
"kvm: vcpu %i: requested lapic timer restore with "