[PATCH v1 0/3] mm: follow_pte() improvements and acrn follow_pte() fixes

David Hildenbrand
2024-04-10T15:55:57Z

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@linux-foundation.org>
Cc: Yonghua Huang <yonghua.huang@intel.com>
Cc: Fei Li <fei1.li@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.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(-)

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2.44.0