target/i386: support KVM_FEATURE_ASYNC_PF_INT

Linux-5.8 introduced interrupt based mechanism for 'page ready' events
delivery and disabled the old, #PF based one (see commit 2635b5c4a0e4
"KVM: x86: interrupt based APF 'page ready' event delivery"). Linux
guest switches to using in in 5.9 (see commit b1d405751cd5 "KVM: x86:
Switch KVM guest to using interrupts for page ready APF delivery").
The feature has a new KVM_FEATURE_ASYNC_PF_INT bit assigned and
the interrupt vector is set in MSR_KVM_ASYNC_PF_INT MSR. Support this
in QEMU.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20200908141206.357450-1-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2020-09-08 16:12:06 +02:00 committed by Paolo Bonzini
parent 1b7e01d008
commit db5daafab2
4 changed files with 32 additions and 1 deletions

View file

@ -1492,6 +1492,7 @@ typedef struct CPUX86State {
uint64_t wall_clock_msr;
uint64_t steal_time_msr;
uint64_t async_pf_en_msr;
uint64_t async_pf_int_msr;
uint64_t pv_eoi_en_msr;
uint64_t poll_control_msr;