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(no To-header on input) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch is to add wrapper functions for tlb_remote_flush_with_range callback. Signed-off-by: Lan Tianyu --- Change since V2: Fix comment in the kvm_flush_remote_tlbs_with_range() --- arch/x86/kvm/mmu.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index c67f09086378..18cac661a41a 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -253,6 +253,54 @@ static void mmu_spte_set(u64 *sptep, u64 spte); static union kvm_mmu_page_role kvm_mmu_calc_root_page_role(struct kvm_vcpu *vcpu); =20 + +static inline bool kvm_available_flush_tlb_with_range(void) +{ + return kvm_x86_ops->tlb_remote_flush_with_range; +} + +static void kvm_flush_remote_tlbs_with_range(struct kvm *kvm, + struct kvm_tlb_range *range) +{ + int ret =3D -ENOTSUPP; + + if (range && kvm_x86_ops->tlb_remote_flush_with_range) { + /* + * Read tlbs_dirty before flushing tlbs in order + * to track dirty tlbs during flushing. + */ + long dirty_count =3D smp_load_acquire(&kvm->tlbs_dirty); + + ret =3D kvm_x86_ops->tlb_remote_flush_with_range(kvm, range); + cmpxchg(&kvm->tlbs_dirty, dirty_count, 0); + } + + if (ret) + kvm_flush_remote_tlbs(kvm); +} + +static void kvm_flush_remote_tlbs_with_list(struct kvm *kvm, + struct list_head *flush_list) +{ + struct kvm_tlb_range range; + + range.flush_list =3D flush_list; + + kvm_flush_remote_tlbs_with_range(kvm, &range); +} + +static void kvm_flush_remote_tlbs_with_address(struct kvm *kvm, + u64 start_gfn, u64 pages) +{ + struct kvm_tlb_range range; + + range.start_gfn =3D start_gfn; + range.pages =3D pages; + range.flush_list =3D NULL; + + kvm_flush_remote_tlbs_with_range(kvm, &range); +} + void kvm_mmu_set_mmio_spte_mask(u64 mmio_mask, u64 mmio_value) { BUG_ON((mmio_mask & mmio_value) !=3D mmio_value); --=20 2.14.4