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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>
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4 changed files with 32 additions and 1 deletions
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@ -1492,6 +1492,7 @@ typedef struct CPUX86State {
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uint64_t wall_clock_msr;
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uint64_t steal_time_msr;
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uint64_t async_pf_en_msr;
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uint64_t async_pf_int_msr;
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uint64_t pv_eoi_en_msr;
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uint64_t poll_control_msr;
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