From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sean Christopherson Date: Wed, 08 Jan 2020 20:24:37 +0000 Subject: [PATCH 03/14] KVM: Use vcpu-specific gva->hva translation when querying host page size Message-Id: <20200108202448.9669-4-sean.j.christopherson@intel.com> List-Id: References: <20200108202448.9669-1-sean.j.christopherson@intel.com> In-Reply-To: <20200108202448.9669-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Paolo Bonzini Cc: Paul Mackerras , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Andrew Morton , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, syzbot+c9d1fb51ac9d0d10c39d@syzkaller.appspotmail.com, Andrea Arcangeli , Barret Rhoden , David Hildenbrand , Jason Zeng , Liran Alon , linux-nvdimm Use kvm_vcpu_gfn_to_hva() when retrieving the host page size so that the correct set of memslots is used when handling x86 page faults in SMM. Fixes: 54bf36aac520 ("KVM: x86: use vcpu-specific functions to read/write/translate GFNs") Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson --- arch/powerpc/kvm/book3s_xive_native.c | 2 +- arch/x86/kvm/mmu/mmu.c | 6 +++--- include/linux/kvm_host.h | 2 +- virt/kvm/kvm_main.c | 4 ++-- 4 files changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/powerpc/kvm/book3s_xive_native.c b/arch/powerpc/kvm/book3s_xive_native.c index d83adb1e1490..6ef0151ff70a 100644 --- a/arch/powerpc/kvm/book3s_xive_native.c +++ b/arch/powerpc/kvm/book3s_xive_native.c @@ -631,7 +631,7 @@ static int kvmppc_xive_native_set_queue_config(struct kvmppc_xive *xive, srcu_idx = srcu_read_lock(&kvm->srcu); gfn = gpa_to_gfn(kvm_eq.qaddr); - page_size = kvm_host_page_size(kvm, gfn); + page_size = kvm_host_page_size(vcpu, gfn); if (1ull << kvm_eq.qshift > page_size) { srcu_read_unlock(&kvm->srcu, srcu_idx); pr_warn("Incompatible host page size %lx!\n", page_size); diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index ca14c84c4f4b..8ca6cd04cdf1 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -1286,12 +1286,12 @@ static bool mmu_gfn_lpage_is_disallowed(struct kvm_vcpu *vcpu, gfn_t gfn, return __mmu_gfn_lpage_is_disallowed(gfn, level, slot); } -static int host_mapping_level(struct kvm *kvm, gfn_t gfn) +static int host_mapping_level(struct kvm_vcpu *vcpu, gfn_t gfn) { unsigned long page_size; int i, ret = 0; - page_size = kvm_host_page_size(kvm, gfn); + page_size = kvm_host_page_size(vcpu, gfn); for (i = PT_PAGE_TABLE_LEVEL; i <= PT_MAX_HUGEPAGE_LEVEL; ++i) { if (page_size >= KVM_HPAGE_SIZE(i)) @@ -1362,7 +1362,7 @@ static int mapping_level(struct kvm_vcpu *vcpu, gfn_t large_gfn, * So, do not propagate host_mapping_level() to max_level as KVM can * still promote the guest mapping to a huge page in the THP case. */ - host_level = host_mapping_level(vcpu->kvm, large_gfn); + host_level = host_mapping_level(vcpu, large_gfn); return min(host_level, max_level); } diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 411b71a02f25..3c0ceec45ebd 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -767,7 +767,7 @@ int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); -unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); +unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn); void mark_page_dirty(struct kvm *kvm, gfn_t gfn); struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index e8ca8bf12320..5f7f06824c2b 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1416,14 +1416,14 @@ bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) } EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); -unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn) +unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn) { struct vm_area_struct *vma; unsigned long addr, size; size = PAGE_SIZE; - addr = gfn_to_hva(kvm, gfn); + addr = kvm_vcpu_gfn_to_hva(vcpu, gfn); if (kvm_is_error_hva(addr)) return PAGE_SIZE; -- 2.24.1