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authorGleb Natapov <gleb@redhat.com>2010-10-14 11:22:53 +0200
committerAvi Kivity <avi@redhat.com>2011-01-12 11:23:17 +0200
commit7c90705bf2a373aa238661bdb6446f27299ef489 (patch)
treed3d00b4413b0d33254d53bbb3285be82444494d9 /arch/x86/include/asm/kvm_host.h
parent631bc4878220932fe67fc46fc7cf7cccdb1ec597 (diff)
downloadop-kernel-dev-7c90705bf2a373aa238661bdb6446f27299ef489.zip
op-kernel-dev-7c90705bf2a373aa238661bdb6446f27299ef489.tar.gz
KVM: Inject asynchronous page fault into a PV guest if page is swapped out.
Send async page fault to a PV guest if it accesses swapped out memory. Guest will choose another task to run upon receiving the fault. Allow async page fault injection only when guest is in user mode since otherwise guest may be in non-sleepable context and will not be able to reschedule. Vcpu will be halted if guest will fault on the same page again or if vcpu executes kernel code. Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
-rw-r--r--arch/x86/include/asm/kvm_host.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 0d70398..167375c 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -421,6 +421,7 @@ struct kvm_vcpu_arch {
gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)];
struct gfn_to_hva_cache data;
u64 msr_val;
+ u32 id;
} apf;
};
@@ -596,6 +597,7 @@ struct kvm_x86_ops {
};
struct kvm_arch_async_pf {
+ u32 token;
gfn_t gfn;
};
@@ -819,6 +821,7 @@ void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
struct kvm_async_pf *work);
void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
struct kvm_async_pf *work);
+bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
#endif /* _ASM_X86_KVM_HOST_H */
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