Re: [PATCH v12 58/84] KVM: RISC-V: Use kvm_faultin_pfn() when mapping pfns into the guest
From: Anup Patel <anup@brainfault.org>
Date: 2024-08-06 15:04:32
Also in:
kvm, kvm-riscv, kvmarm, linux-mips, linux-riscv, linuxppc-dev, lkml, loongarch
On Sat, Jul 27, 2024 at 5:24 AM Sean Christopherson [off-list ref] wrote:
Convert RISC-V to __kvm_faultin_pfn()+kvm_release_faultin_page(), which are new APIs to consolidate arch code and provide consistent behavior across all KVM architectures. Signed-off-by: Sean Christopherson <seanjc@google.com>
For KVM RISC-V: Acked-by: Anup Patel <anup@brainfault.org> Regards, Anup
quoted hunk ↗ jump to hunk
--- arch/riscv/kvm/mmu.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-)diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c index 806f68e70642..f73d6a79a78c 100644 --- a/arch/riscv/kvm/mmu.c +++ b/arch/riscv/kvm/mmu.c@@ -601,6 +601,7 @@ int kvm_riscv_gstage_map(struct kvm_vcpu *vcpu, bool logging = (memslot->dirty_bitmap && !(memslot->flags & KVM_MEM_READONLY)) ? true : false; unsigned long vma_pagesize, mmu_seq; + struct page *page; /* We need minimum second+third level pages */ ret = kvm_mmu_topup_memory_cache(pcache, gstage_pgd_levels);@@ -631,7 +632,7 @@ int kvm_riscv_gstage_map(struct kvm_vcpu *vcpu, /* * Read mmu_invalidate_seq so that KVM can detect if the results of - * vma_lookup() or gfn_to_pfn_prot() become stale priort to acquiring + * vma_lookup() or __kvm_faultin_pfn() become stale priort to acquiring * kvm->mmu_lock. * * Rely on mmap_read_unlock() for an implicit smp_rmb(), which pairs@@ -647,7 +648,7 @@ int kvm_riscv_gstage_map(struct kvm_vcpu *vcpu, return -EFAULT; } - hfn = gfn_to_pfn_prot(kvm, gfn, is_write, &writable); + hfn = kvm_faultin_pfn(vcpu, gfn, is_write, &writable, &page); if (hfn == KVM_PFN_ERR_HWPOISON) { send_sig_mceerr(BUS_MCEERR_AR, (void __user *)hva, vma_pageshift, current);@@ -681,11 +682,7 @@ int kvm_riscv_gstage_map(struct kvm_vcpu *vcpu, kvm_err("Failed to map in G-stage\n"); out_unlock: - if ((!ret || ret == -EEXIST) && writable) - kvm_set_pfn_dirty(hfn); - else - kvm_release_pfn_clean(hfn); - + kvm_release_faultin_page(kvm, page, ret && ret != -EEXIST, writable); spin_unlock(&kvm->mmu_lock); return ret; } --2.46.0.rc1.232.g9752f9e123-goog