From: Chao Peng <chao.p.peng@linux.intel.com> To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, qemu-devel@nongnu.org Cc: Paolo Bonzini <pbonzini@redhat.com>, Jonathan Corbet <corbet@lwn.net>, Sean Christopherson <seanjc@google.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, Wanpeng Li <wanpengli@tencent.com>, Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>, Hugh Dickins <hughd@google.com>, Jeff Layton <jlayton@kernel.org>, "J . Bruce Fields" <bfields@fieldses.org>, Andrew Morton <akpm@linux-foundation.org>, Yu Zhang <yu.c.zhang@linux.intel.com>, Chao Peng <chao.p.peng@linux.intel.com>, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, luto@kernel.org, john.ji@intel.com, susie.li@intel.com, jun.nakajima@intel.com, dave.hansen@intel.com, ak@linux.intel.com, david@redhat.com Subject: [RFC v2 PATCH 04/13] KVM: Add fd-based memslot data structure and utils Date: Fri, 19 Nov 2021 21:47:30 +0800 [thread overview] Message-ID: <20211119134739.20218-5-chao.p.peng@linux.intel.com> (raw) In-Reply-To: <20211119134739.20218-1-chao.p.peng@linux.intel.com> For fd-based memslot store the file references for shared fd and the private fd (if any) in the memslot structure. Since there is no 'hva' concept we cannot call hva_to_pfn() to get a pfn, instead kvm_memfd_ops is added to get_pfn/put_pfn from the memory backing stores that provide these fds. Signed-off-by: Yu Zhang <yu.c.zhang@linux.intel.com> Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com> --- include/linux/kvm_host.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 99e9f9969703..1d4ac0c9b63b 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -424,6 +424,12 @@ static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) */ #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) +struct kvm_memfd_ops { + kvm_pfn_t (*get_pfn)(struct kvm_memory_slot *slot, struct file *file, + gfn_t gfn, bool alloc, int *order); + void (*put_pfn)(kvm_pfn_t pfn); +}; + struct kvm_memory_slot { gfn_t base_gfn; unsigned long npages; @@ -433,6 +439,9 @@ struct kvm_memory_slot { u32 flags; short id; u16 as_id; + struct file *file; + struct file *priv_file; + struct kvm_memfd_ops *memfd_ops; }; static inline bool kvm_slot_dirty_track_enabled(struct kvm_memory_slot *slot) @@ -1310,6 +1319,20 @@ static inline int memslot_id(struct kvm *kvm, gfn_t gfn) return gfn_to_memslot(kvm, gfn)->id; } +static inline bool memslot_is_memfd(const struct kvm_memory_slot *slot) +{ + if (slot && slot->memfd_ops) + return true; + return false; +} + +static inline bool memslot_has_private(const struct kvm_memory_slot *slot) +{ + if (slot && slot->priv_file) + return true; + return false; +} + static inline gfn_t hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) { -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Chao Peng <chao.p.peng@linux.intel.com> To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, qemu-devel@nongnu.org Cc: Wanpeng Li <wanpengli@tencent.com>, jun.nakajima@intel.com, david@redhat.com, "J . Bruce Fields" <bfields@fieldses.org>, dave.hansen@intel.com, "H . Peter Anvin" <hpa@zytor.com>, Chao Peng <chao.p.peng@linux.intel.com>, ak@linux.intel.com, Jonathan Corbet <corbet@lwn.net>, Joerg Roedel <joro@8bytes.org>, x86@kernel.org, Hugh Dickins <hughd@google.com>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, luto@kernel.org, Thomas Gleixner <tglx@linutronix.de>, Vitaly Kuznetsov <vkuznets@redhat.com>, Jim Mattson <jmattson@google.com>, Sean Christopherson <seanjc@google.com>, susie.li@intel.com, Jeff Layton <jlayton@kernel.org>, john.ji@intel.com, Yu Zhang <yu.c.zhang@linux.intel.com>, Paolo Bonzini <pbonzini@redhat.com>, Andrew Morton <akpm@linux-foundation.org>, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Subject: [RFC v2 PATCH 04/13] KVM: Add fd-based memslot data structure and utils Date: Fri, 19 Nov 2021 21:47:30 +0800 [thread overview] Message-ID: <20211119134739.20218-5-chao.p.peng@linux.intel.com> (raw) In-Reply-To: <20211119134739.20218-1-chao.p.peng@linux.intel.com> For fd-based memslot store the file references for shared fd and the private fd (if any) in the memslot structure. Since there is no 'hva' concept we cannot call hva_to_pfn() to get a pfn, instead kvm_memfd_ops is added to get_pfn/put_pfn from the memory backing stores that provide these fds. Signed-off-by: Yu Zhang <yu.c.zhang@linux.intel.com> Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com> --- include/linux/kvm_host.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 99e9f9969703..1d4ac0c9b63b 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -424,6 +424,12 @@ static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) */ #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) +struct kvm_memfd_ops { + kvm_pfn_t (*get_pfn)(struct kvm_memory_slot *slot, struct file *file, + gfn_t gfn, bool alloc, int *order); + void (*put_pfn)(kvm_pfn_t pfn); +}; + struct kvm_memory_slot { gfn_t base_gfn; unsigned long npages; @@ -433,6 +439,9 @@ struct kvm_memory_slot { u32 flags; short id; u16 as_id; + struct file *file; + struct file *priv_file; + struct kvm_memfd_ops *memfd_ops; }; static inline bool kvm_slot_dirty_track_enabled(struct kvm_memory_slot *slot) @@ -1310,6 +1319,20 @@ static inline int memslot_id(struct kvm *kvm, gfn_t gfn) return gfn_to_memslot(kvm, gfn)->id; } +static inline bool memslot_is_memfd(const struct kvm_memory_slot *slot) +{ + if (slot && slot->memfd_ops) + return true; + return false; +} + +static inline bool memslot_has_private(const struct kvm_memory_slot *slot) +{ + if (slot && slot->priv_file) + return true; + return false; +} + static inline gfn_t hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) { -- 2.17.1
next prev parent reply other threads:[~2021-11-19 13:49 UTC|newest] Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-11-19 13:47 [RFC v2 PATCH 00/13] KVM: mm: fd-based approach for supporting KVM guest private memory Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-19 13:47 ` [RFC v2 PATCH 01/13] mm/shmem: Introduce F_SEAL_GUEST Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-19 13:51 ` David Hildenbrand 2021-11-19 13:51 ` David Hildenbrand 2021-11-22 13:59 ` Kirill A. Shutemov 2021-11-22 13:59 ` Kirill A. Shutemov 2021-11-19 15:19 ` Jason Gunthorpe 2021-11-19 15:19 ` Jason Gunthorpe 2021-11-19 15:39 ` David Hildenbrand 2021-11-19 15:39 ` David Hildenbrand 2021-11-19 16:00 ` Jason Gunthorpe 2021-11-19 16:00 ` Jason Gunthorpe 2021-11-22 9:26 ` David Hildenbrand 2021-11-22 9:26 ` David Hildenbrand 2021-11-22 13:31 ` Jason Gunthorpe 2021-11-22 13:31 ` Jason Gunthorpe 2021-11-22 13:35 ` David Hildenbrand 2021-11-22 13:35 ` David Hildenbrand 2021-11-22 14:01 ` Jason Gunthorpe 2021-11-22 14:01 ` Jason Gunthorpe 2021-11-22 14:57 ` David Hildenbrand 2021-11-22 14:57 ` David Hildenbrand 2021-11-22 15:09 ` Jason Gunthorpe 2021-11-22 15:09 ` Jason Gunthorpe 2021-11-22 15:15 ` David Hildenbrand 2021-11-22 15:15 ` David Hildenbrand 2021-11-19 19:18 ` Sean Christopherson 2021-11-19 19:47 ` Jason Gunthorpe 2021-11-19 19:47 ` Jason Gunthorpe 2021-11-19 22:21 ` Sean Christopherson 2021-11-19 23:33 ` Jason Gunthorpe 2021-11-19 23:33 ` Jason Gunthorpe 2021-11-20 1:23 ` Sean Christopherson 2021-11-21 0:05 ` Jason Gunthorpe 2021-11-21 0:05 ` Jason Gunthorpe 2021-11-23 9:06 ` Paolo Bonzini 2021-11-23 9:06 ` Paolo Bonzini 2021-11-23 14:33 ` Chao Peng 2021-11-23 14:33 ` Chao Peng 2021-11-23 15:20 ` David Hildenbrand 2021-11-23 15:20 ` David Hildenbrand 2021-11-23 17:17 ` Jason Gunthorpe 2021-11-23 17:17 ` Jason Gunthorpe 2021-11-23 8:54 ` Paolo Bonzini 2021-11-23 8:54 ` Paolo Bonzini 2021-12-03 1:11 ` Andy Lutomirski 2021-12-03 1:11 ` Andy Lutomirski 2021-11-19 13:47 ` [RFC v2 PATCH 02/13] KVM: Add KVM_EXIT_MEMORY_ERROR exit Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-19 13:47 ` [RFC v2 PATCH 03/13] KVM: Extend kvm_userspace_memory_region to support fd based memslot Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-19 13:47 ` Chao Peng [this message] 2021-11-19 13:47 ` [RFC v2 PATCH 04/13] KVM: Add fd-based memslot data structure and utils Chao Peng 2021-11-23 8:41 ` Paolo Bonzini 2021-11-23 8:41 ` Paolo Bonzini 2021-11-23 14:30 ` Chao Peng 2021-11-23 14:30 ` Chao Peng 2021-11-19 13:47 ` [RFC v2 PATCH 05/13] KVM: Implement fd-based memory using new memfd interfaces Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-19 13:47 ` [RFC v2 PATCH 06/13] KVM: Register/unregister memfd backed memslot Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-25 16:55 ` Steven Price 2021-11-25 16:55 ` Steven Price 2021-11-19 13:47 ` [RFC v2 PATCH 07/13] KVM: Handle page fault for fd based memslot Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-20 1:55 ` Yao Yuan 2021-11-20 1:55 ` Yao Yuan 2021-11-22 9:18 ` Chao Peng 2021-11-22 9:18 ` Chao Peng 2021-11-19 13:47 ` [RFC v2 PATCH 08/13] KVM: Rename hva memory invalidation code to cover fd-based offset Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-19 13:47 ` [RFC v2 PATCH 09/13] KVM: Introduce kvm_memfd_invalidate_range Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-23 8:46 ` Paolo Bonzini 2021-11-23 8:46 ` Paolo Bonzini 2021-11-23 14:24 ` Chao Peng 2021-11-23 14:24 ` Chao Peng 2021-11-19 13:47 ` [RFC v2 PATCH 10/13] KVM: Match inode for invalidation of fd-based slot Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-19 13:47 ` [RFC v2 PATCH 11/13] KVM: Add kvm_map_gfn_range Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-19 13:47 ` [RFC v2 PATCH 12/13] KVM: Introduce kvm_memfd_fallocate_range Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-19 13:47 ` [RFC v2 PATCH 13/13] KVM: Enable memfd based page invalidation/fallocate Chao Peng 2021-11-19 13:47 ` Chao Peng 2021-11-22 14:16 ` Kirill A. Shutemov 2021-11-22 14:16 ` Kirill A. Shutemov 2021-11-23 1:06 ` Chao Peng 2021-11-23 1:06 ` Chao Peng 2021-11-23 9:09 ` Paolo Bonzini 2021-11-23 9:09 ` Paolo Bonzini 2021-11-23 15:00 ` Chao Peng 2021-11-23 15:00 ` Chao Peng 2021-11-23 8:51 ` Paolo Bonzini 2021-11-23 8:51 ` Paolo Bonzini 2021-12-03 1:08 ` [RFC v2 PATCH 00/13] KVM: mm: fd-based approach for supporting KVM guest private memory Andy Lutomirski 2021-12-03 1:08 ` Andy Lutomirski
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