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charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260507-gmem-inplace-conversion-v6-16-91ab5a8b19a4@google.com> References: <20260507-gmem-inplace-conversion-v6-0-91ab5a8b19a4@google.com> In-Reply-To: <20260507-gmem-inplace-conversion-v6-0-91ab5a8b19a4@google.com> To: aik@amd.com, andrew.jones@linux.dev, binbin.wu@linux.intel.com, brauner@kernel.org, chao.p.peng@linux.intel.com, david@kernel.org, ira.weiny@intel.com, jmattson@google.com, jthoughton@google.com, michael.roth@amd.com, oupton@kernel.org, pankaj.gupta@amd.com, qperret@google.com, rick.p.edgecombe@intel.com, rientjes@google.com, shivankg@amd.com, steven.price@arm.com, tabba@google.com, willy@infradead.org, wyihan@google.com, yan.y.zhao@intel.com, forkloop@google.com, pratyush@kernel.org, suzuki.poulose@arm.com, aneesh.kumar@kernel.org, liam@infradead.org, Paolo Bonzini , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Shuah Khan , Shuah Khan , Vishal Annapurve , Andrew Morton , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Youngjun Park , Qi Zheng , Shakeel Butt , Kiryl Shutsemau , Jason Gunthorpe , Vlastimil Babka Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-coco@lists.linux.dev, Ackerley Tng X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1778185365; l=1535; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=LSFEUZnHaOopcxqUEi0sDjR1Doime7tSJ4O6yqxwRt0=; b=/vOP4AdpdOPvG0vm/pWq6fbnDjc3tTn7sEYOQboWhIq67Ao5ApttT2OLD+kQoR9LNtnsKf+tf 6p0lDRmkhG6BqVgy195ik79HDXsZwZRhvx0PXefOX24yR8AcenlQKt0 X-Developer-Key: i=ackerleytng@google.com; a=ed25519; pk=sAZDYXdm6Iz8FHitpHeFlCMXwabodTm7p8/3/8xUxuU= X-Endpoint-Received: by B4 Relay for ackerleytng@google.com/20260225 with auth_id=649 X-Original-From: Ackerley Tng Reply-To: ackerleytng@google.com X-Rspam-User: X-Rspamd-Queue-Id: A428940006 X-Rspamd-Server: rspam04 X-Stat-Signature: 5at1775ppbheqzx38rbgycb9ttmbft3y X-HE-Tag: 1778185376-49062 X-HE-Meta: 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 k2bVch1+ FPBSIFY9+UVGMviuaI6WycA/Z8lH1YwHTHzKoTwA0mhT3w5Qg0u8fvtSaJYZz8sGOXnKIchcTV87J7WCWObND/6YWFQ6NQ2tjheUv9+Y7nos/KKJyVMxnJV3lpPmqkHRJ+RBujnB1fEr3IBiV3SZP0zyatUPbFw9EoXTlvrHX2BjXJZnVjqB2SWV9IvnCBefLD0MOgzbSLK4NAC2NeXLCuZYHgCGKLaragtE/UNJejs3h7AZjbFG7Jwdx8L54BGHwqDmfFUNqJ4GfxO+QmKU4H/IOCL01Shb+Qo1eJhFcrn4+oWGsxa91KbaZfHJROm5r+Gv9iH6sz9wOpgoAgRnOurP1nG5r+gRE0xZsPI2Neh3vNxk9vhBRcVBYadX1z8TSGGHqbt/JQfDdwDyq3aZp48GhND6g9SsUbe8VJJISndxhFvIvN6EBv2avJ+jXz7nBfqbFsP3JOcSwCg+WIpy+cW5PGg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Ackerley Tng __kvm_gmem_invalidate_begin() and __kvm_gmem_invalidate_end() actually do not specially handle -1ul. -1ul is used as a huge number, which legal indices do not exceed, and hence the invalidation works as expected. Since a later patch is going to make use of the exact range, calculate the size of the guest_memfd inode and use it as the end range for invalidating SPTEs. Signed-off-by: Ackerley Tng --- virt/kvm/guest_memfd.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c index 050a8c092b1a3..9f6eebfb68f6b 100644 --- a/virt/kvm/guest_memfd.c +++ b/virt/kvm/guest_memfd.c @@ -370,6 +370,7 @@ static int kvm_gmem_release(struct inode *inode, struct file *file) struct kvm_memory_slot *slot; struct kvm *kvm = f->kvm; unsigned long index; + pgoff_t end; /* * Prevent concurrent attempts to *unbind* a memslot. This is the last @@ -396,9 +397,10 @@ static int kvm_gmem_release(struct inode *inode, struct file *file) * Zap all SPTEs pointed at by this file. Do not free the backing * memory, as its lifetime is associated with the inode, not the file. */ - __kvm_gmem_invalidate_begin(f, 0, -1ul, + end = i_size_read(inode) >> PAGE_SHIFT; + __kvm_gmem_invalidate_begin(f, 0, end, kvm_gmem_get_invalidate_filter(inode)); - __kvm_gmem_invalidate_end(f, 0, -1ul); + __kvm_gmem_invalidate_end(f, 0, end); list_del(&f->entry); -- 2.54.0.563.g4f69b47b94-goog