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acrn: use the new follow_pfnmap API

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Use the new API that can understand huge pfn mappings.

Link: https://lkml.kernel.org/r/20240826204353.2228736-15-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Gavin Shan <gshan@redhat.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Niklas Schnelle <schnelle@linux.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Peter Xu 2024-08-26 16:43:48 -04:00 committed by Andrew Morton
parent a77f9489f1
commit e6bc784c24
1 changed files with 9 additions and 7 deletions
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16
drivers/virt/acrn/mm.c
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@ -177,9 +177,7 @@ int acrn_vm_ram_map(struct acrn_vm *vm, struct acrn_vm_memmap *memmap)
vma = vma_lookup(current->mm, memmap->vma_base);
if (vma && ((vma->vm_flags & VM_PFNMAP) != 0)) {
unsigned long start_pfn, cur_pfn;
spinlock_t *ptl;
bool writable;
pte_t *ptep;
if ((memmap->vma_base + memmap->len) > vma->vm_end) {
mmap_read_unlock(current->mm);
@ -187,16 +185,20 @@ int acrn_vm_ram_map(struct acrn_vm *vm, struct acrn_vm_memmap *memmap)
}
for (i = 0; i < nr_pages; i++) {
ret = follow_pte(vma, memmap->vma_base + i * PAGE_SIZE,
&ptep, &ptl);
struct follow_pfnmap_args args = {
.vma = vma,
.address = memmap->vma_base + i * PAGE_SIZE,
};
ret = follow_pfnmap_start(&args);
if (ret)
break;
cur_pfn = pte_pfn(ptep_get(ptep));
cur_pfn = args.pfn;
if (i == 0)
start_pfn = cur_pfn;
writable = !!pte_write(ptep_get(ptep));
pte_unmap_unlock(ptep, ptl);
writable = args.writable;
follow_pfnmap_end(&args);
/* Disallow write access if the PTE is not writable. */
if (!writable &&