diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2020-09-08 16:12:06 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-09-30 19:09:19 +0200 |
| commit | db5daafab2dadc029f48e6a64c3cf0c6e44d35f8 (patch) | |
| tree | 9126eef7f4461603f0d74c7838eeadc27d43827a /target/i386/machine.c | |
| parent | 1b7e01d00854cb053d8dbed6a064038c162a27ef (diff) | |
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>
Diffstat (limited to 'target/i386/machine.c')
| -rw-r--r-- | target/i386/machine.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/target/i386/machine.c b/target/i386/machine.c index b1acf7d0ef..233e46bb70 100644 --- a/target/i386/machine.c +++ b/target/i386/machine.c @@ -394,6 +394,13 @@ static bool async_pf_msr_needed(void *opaque) return cpu->env.async_pf_en_msr != 0; } +static bool async_pf_int_msr_needed(void *opaque) +{ + X86CPU *cpu = opaque; + + return cpu->env.async_pf_int_msr != 0; +} + static bool pv_eoi_msr_needed(void *opaque) { X86CPU *cpu = opaque; @@ -467,6 +474,17 @@ static const VMStateDescription vmstate_async_pf_msr = { } }; +static const VMStateDescription vmstate_async_pf_int_msr = { + .name = "cpu/async_pf_int_msr", + .version_id = 1, + .minimum_version_id = 1, + .needed = async_pf_int_msr_needed, + .fields = (VMStateField[]) { + VMSTATE_UINT64(env.async_pf_int_msr, X86CPU), + VMSTATE_END_OF_LIST() + } +}; + static const VMStateDescription vmstate_pv_eoi_msr = { .name = "cpu/async_pv_eoi_msr", .version_id = 1, @@ -1438,6 +1456,7 @@ VMStateDescription vmstate_x86_cpu = { .subsections = (const VMStateDescription*[]) { &vmstate_exception_info, &vmstate_async_pf_msr, + &vmstate_async_pf_int_msr, &vmstate_pv_eoi_msr, &vmstate_steal_time_msr, &vmstate_poll_control_msr, |