From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 051CA1C8FB0 for ; Tue, 27 Aug 2024 23:52:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724802745; cv=none; b=UwH4U/xEplj2M9VEbIM10cNZkrumdXgPcB8odrwHpJU+FAXbkCaL3SpdyJvizpH6a76s65IvwVfaGy2WjkrPBSxggaguXU71nVyS13vbkAaBB0G70WhtsreK80IvpzyYa9pTEWzxtYGOOh/VS6cFtPuqfaWHTMpM+r0CR5tu0/o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724802745; c=relaxed/simple; bh=l63amU0A9Rxyn5GzvywuGmYMWGmQcwzbHmOFLSDvmLQ=; h=Date:To:From:Subject:Message-Id; b=uOiJbk1OXEDCuQHLSkAH2pIwBf5K8PKdX+gVXOwwFbxEO4q3bq8QR7I5wzAwo+tA5R6vpHmOgaD1carg5pLKPrU7prrnJNpkkmcvhTwjkPhg3QwcAOya4EzioCcBuQoI8ilN7tIpwTZFPLXbiOoSkfgPAmQEVM6/sloRWos4470= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=FRJnnQ9l; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="FRJnnQ9l" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CAECBC32782; Tue, 27 Aug 2024 23:52:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1724802744; bh=l63amU0A9Rxyn5GzvywuGmYMWGmQcwzbHmOFLSDvmLQ=; h=Date:To:From:Subject:From; b=FRJnnQ9lt6cIzGNNeYo+PZ/6qpywMSUHcnrQe0jgxBgwMUb5abb7t/p+fWe8aBHCW qzh3M6TsUPC9VhEKzz2aWoyHg7nTRpidzLH4YgPxrPJqu6ADiY5xur9GSuBo4UdLIx TDwBnqZay45P2TntGx5tR4HAh+3lKotLPSACJMzI= Date: Tue, 27 Aug 2024 16:52:24 -0700 To: mm-commits@vger.kernel.org,ziy@nvidia.com,willy@infradead.org,will@kernel.org,tglx@linutronix.de,svens@linux.ibm.com,seanjc@google.com,schnelle@linux.ibm.com,ryan.roberts@arm.com,pbonzini@redhat.com,mingo@redhat.com,jgg@nvidia.com,hca@linux.ibm.com,gshan@redhat.com,gor@linux.ibm.com,gerald.schaefer@linux.ibm.com,david@redhat.com,dave.hansen@linux.intel.com,catalin.marinas@arm.com,bp@alien8.de,borntraeger@linux.ibm.com,aneesh.kumar@linux.ibm.com,alex.williamson@redhat.com,agordeev@linux.ibm.com,peterx@redhat.com,akpm@linux-foundation.org From: Andrew Morton Subject: + kvm-use-follow_pfnmap-api.patch added to mm-unstable branch Message-Id: <20240827235224.CAECBC32782@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: KVM: use follow_pfnmap API has been added to the -mm mm-unstable branch. Its filename is kvm-use-follow_pfnmap-api.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kvm-use-follow_pfnmap-api.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Peter Xu Subject: KVM: use follow_pfnmap API Date: Mon, 26 Aug 2024 16:43:44 -0400 Use the new pfnmap API to allow huge MMIO mappings for VMs. The rest work is done perfectly on the other side (host_pfn_mapping_level()). Link: https://lkml.kernel.org/r/20240826204353.2228736-11-peterx@redhat.com Signed-off-by: Peter Xu Cc: Paolo Bonzini Cc: Sean Christopherson Cc: Alexander Gordeev Cc: Alex Williamson Cc: Aneesh Kumar K.V Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Dave Hansen Cc: David Hildenbrand Cc: Gavin Shan Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Ingo Molnar Cc: Jason Gunthorpe Cc: Matthew Wilcox Cc: Niklas Schnelle Cc: Ryan Roberts Cc: Sven Schnelle Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Cc: Zi Yan Signed-off-by: Andrew Morton --- virt/kvm/kvm_main.c | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) --- a/virt/kvm/kvm_main.c~kvm-use-follow_pfnmap-api +++ a/virt/kvm/kvm_main.c @@ -2860,13 +2860,11 @@ static int hva_to_pfn_remapped(struct vm unsigned long addr, bool write_fault, bool *writable, kvm_pfn_t *p_pfn) { + struct follow_pfnmap_args args = { .vma = vma, .address = addr }; kvm_pfn_t pfn; - pte_t *ptep; - pte_t pte; - spinlock_t *ptl; int r; - r = follow_pte(vma, addr, &ptep, &ptl); + r = follow_pfnmap_start(&args); if (r) { /* * get_user_pages fails for VM_IO and VM_PFNMAP vmas and does @@ -2881,21 +2879,19 @@ static int hva_to_pfn_remapped(struct vm if (r) return r; - r = follow_pte(vma, addr, &ptep, &ptl); + r = follow_pfnmap_start(&args); if (r) return r; } - pte = ptep_get(ptep); - - if (write_fault && !pte_write(pte)) { + if (write_fault && !args.writable) { pfn = KVM_PFN_ERR_RO_FAULT; goto out; } if (writable) - *writable = pte_write(pte); - pfn = pte_pfn(pte); + *writable = args.writable; + pfn = args.pfn; /* * Get a reference here because callers of *hva_to_pfn* and @@ -2916,9 +2912,8 @@ static int hva_to_pfn_remapped(struct vm */ if (!kvm_try_get_pfn(pfn)) r = -EFAULT; - out: - pte_unmap_unlock(ptep, ptl); + follow_pfnmap_end(&args); *p_pfn = pfn; return r; _ Patches currently in -mm which might be from peterx@redhat.com are mm-dax-dump-start-address-in-fault-handler.patch mm-mprotect-push-mmu-notifier-to-puds.patch mm-powerpc-add-missing-pud-helpers.patch mm-x86-make-pud_leaf-only-care-about-pse-bit.patch mm-x86-implement-arch_check_zapped_pud.patch mm-x86-add-missing-pud-helpers.patch mm-mprotect-fix-dax-pud-handlings.patch mm-introduce-arch_supports_huge_pfnmap-and-special-bits-to-pmd-pud.patch mm-drop-is_huge_zero_pud.patch mm-mark-special-bits-for-huge-pfn-mappings-when-inject.patch mm-allow-thp-orders-for-pfnmaps.patch mm-gup-detect-huge-pfnmap-entries-in-gup-fast.patch mm-pagewalk-check-pfnmap-for-folio_walk_start.patch mm-fork-accept-huge-pfnmap-entries.patch mm-always-define-pxx_pgprot.patch mm-new-follow_pfnmap-api.patch kvm-use-follow_pfnmap-api.patch s390-pci_mmio-use-follow_pfnmap-api.patch mm-x86-pat-use-the-new-follow_pfnmap-api.patch vfio-use-the-new-follow_pfnmap-api.patch acrn-use-the-new-follow_pfnmap-api.patch mm-access_process_vm-use-the-new-follow_pfnmap-api.patch mm-remove-follow_pte.patch mm-x86-support-large-pfn-mappings.patch mm-arm64-support-large-pfn-mappings.patch