diff options
| author | Sean Christopherson <seanjc@google.com> | 2023-07-29 04:35:28 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-08-31 21:08:14 +0300 |
| commit | e998fb1a30131fdc7c734bc7422000b41146b631 (patch) | |
| tree | 65e0861288a3c365a500a5e0d0541a56e41836d2 /arch/x86/include/asm/kvm_host.h | |
| parent | 58ea7cf700cae441fd41d17e6f8092a4f9e2e32b (diff) | |
| download | linux-e998fb1a30131fdc7c734bc7422000b41146b631.tar.xz | |
KVM: x86/mmu: Use page-track notifiers iff there are external users
Disable the page-track notifier code at compile time if there are no
external users, i.e. if CONFIG_KVM_EXTERNAL_WRITE_TRACKING=n. KVM itself
now hooks emulated writes directly instead of relying on the page-track
mechanism.
Provide a stub for "struct kvm_page_track_notifier_node" so that including
headers directly from the command line, e.g. for testing include guards,
doesn't fail due to a struct having an incomplete type.
Reviewed-by: Yan Zhao <yan.y.zhao@intel.com>
Tested-by: Yongwei Ma <yongwei.ma@intel.com>
Link: https://lore.kernel.org/r/20230729013535.1070024-23-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 93fdc42458cc..29ad3f0a126f 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1265,7 +1265,9 @@ struct kvm_arch { * create an NX huge page (without hanging the guest). */ struct list_head possible_nx_huge_pages; +#ifdef CONFIG_KVM_EXTERNAL_WRITE_TRACKING struct kvm_page_track_notifier_head track_notifier_head; +#endif /* * Protects marking pages unsync during page faults, as TDP MMU page * faults only take mmu_lock for read. For simplicity, the unsync |