linux-kernel - [PATCH v1 0/3] mm: follow_pte() improvements and acrn follow

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Date: Wed, 10 Apr 2024 17:55:24 +0200
From: David Hildenbrand <david@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org,
	x86@...nel.org,
	linux-s390@...r.kernel.org,
	kvm@...r.kernel.org,
	David Hildenbrand <david@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Yonghua Huang <yonghua.huang@...el.com>,
	Fei Li <fei1.li@...el.com>,
	Christoph Hellwig <hch@....de>,
	Gerald Schaefer <gerald.schaefer@...ux.ibm.com>,
	Heiko Carstens <hca@...ux.ibm.com>,
	Ingo Molnar <mingo@...hat.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>
Subject: [PATCH v1 0/3] mm: follow_pte() improvements and acrn follow_pte() fixes

Patch #1 fixes a bunch of issues I spotted in the acrn driver. It compiles,
that's all I know. I'll appreciate some review and testing from acrn
folks.

Patch #2+#3 improve follow_pte(), passing a VMA instead of the MM, adding
more sanity checks, and improving the documentation. Gave it a quick
test on x86-64 using VM_PAT that ends up using follow_pte().

Not CCing all s390x and x86 maintainers (but lists), to reduce noise.

As this depends on other stuff in mm-unstable, this should likely go via
the MM tree.

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Yonghua Huang <yonghua.huang@...el.com>
Cc: Fei Li <fei1.li@...el.com>
Cc: Christoph Hellwig <hch@....de>
Cc: Gerald Schaefer <gerald.schaefer@...ux.ibm.com>
Cc: Heiko Carstens <hca@...ux.ibm.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Alex Williamson <alex.williamson@...hat.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>

David Hildenbrand (3):
  drivers/virt/acrn: fix PFNMAP PTE checks in acrn_vm_ram_map()
  mm: pass VMA instead of MM to follow_pte()
  mm: follow_pte() improvements

 arch/s390/pci/pci_mmio.c        |  4 +--
 arch/x86/mm/pat/memtype.c       |  5 +--
 drivers/vfio/vfio_iommu_type1.c |  4 +--
 drivers/virt/acrn/mm.c          | 62 ++++++++++++++++++++++++---------
 include/linux/mm.h              |  2 +-
 mm/memory.c                     | 35 ++++++++++++-------
 virt/kvm/kvm_main.c             |  4 +--
 7 files changed, 77 insertions(+), 39 deletions(-)

-- 
2.44.0