[PATCH v4 18/22] powerpc/kvm/book3s: Use find_kvm_host_pte in kvmppc_get_hpa
From: Aneesh Kumar K.V <hidden>
Date: 2020-05-05 08:03:52
Subsystem:
kernel virtual machine for powerpc (kvm/powerpc), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
Signed-off-by: Aneesh Kumar K.V <redacted> --- arch/powerpc/kvm/book3s_hv_rm_mmu.c | 32 ++++++++++------------------- 1 file changed, 11 insertions(+), 21 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index 83e987fecf97..3b168c69d503 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c@@ -878,8 +878,8 @@ long kvmppc_h_clear_mod(struct kvm_vcpu *vcpu, unsigned long flags, return ret; } -static int kvmppc_get_hpa(struct kvm_vcpu *vcpu, unsigned long gpa, - int writing, unsigned long *hpa, +static int kvmppc_get_hpa(struct kvm_vcpu *vcpu, unsigned long mmu_seq, + unsigned long gpa, int writing, unsigned long *hpa, struct kvm_memory_slot **memslot_p) { struct kvm *kvm = vcpu->kvm;
@@ -898,7 +898,7 @@ static int kvmppc_get_hpa(struct kvm_vcpu *vcpu, unsigned long gpa, hva = __gfn_to_hva_memslot(memslot, gfn); /* Try to find the host pte for that virtual address */ - ptep = __find_linux_pte(vcpu->arch.pgdir, hva, NULL, &shift); + ptep = find_kvm_host_pte(kvm, mmu_seq, hva, &shift); if (!ptep) return H_TOO_HARD; pte = kvmppc_read_update_linux_pte(ptep, writing);
@@ -933,16 +933,11 @@ static long kvmppc_do_h_page_init_zero(struct kvm_vcpu *vcpu, mmu_seq = kvm->mmu_notifier_seq; smp_rmb(); - ret = kvmppc_get_hpa(vcpu, dest, 1, &pa, &memslot); - if (ret != H_SUCCESS) - return ret; - - /* Check if we've been invalidated */ arch_spin_lock(&kvm->mmu_lock.rlock.raw_lock); - if (mmu_notifier_retry(kvm, mmu_seq)) { - ret = H_TOO_HARD; + + ret = kvmppc_get_hpa(vcpu, mmu_seq, dest, 1, &pa, &memslot); + if (ret != H_SUCCESS) goto out_unlock; - } /* Zero the page */ for (i = 0; i < SZ_4K; i += L1_CACHE_BYTES, pa += L1_CACHE_BYTES)
@@ -966,19 +961,14 @@ static long kvmppc_do_h_page_init_copy(struct kvm_vcpu *vcpu, mmu_seq = kvm->mmu_notifier_seq; smp_rmb(); - ret = kvmppc_get_hpa(vcpu, dest, 1, &dest_pa, &dest_memslot); - if (ret != H_SUCCESS) - return ret; - ret = kvmppc_get_hpa(vcpu, src, 0, &src_pa, NULL); + arch_spin_lock(&kvm->mmu_lock.rlock.raw_lock); + ret = kvmppc_get_hpa(vcpu, mmu_seq, dest, 1, &dest_pa, &dest_memslot); if (ret != H_SUCCESS) - return ret; + goto out_unlock; - /* Check if we've been invalidated */ - arch_spin_lock(&kvm->mmu_lock.rlock.raw_lock); - if (mmu_notifier_retry(kvm, mmu_seq)) { - ret = H_TOO_HARD; + ret = kvmppc_get_hpa(vcpu, mmu_seq, src, 0, &src_pa, NULL); + if (ret != H_SUCCESS) goto out_unlock; - } /* Copy the page */ memcpy((void *)dest_pa, (void *)src_pa, SZ_4K);
--
2.26.2