diff options
| author | Mike Rapoport (Microsoft) <rppt@kernel.org> | 2025-09-21 08:44:56 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-10-07 13:48:55 -0700 |
| commit | 8375b76517cb52bac0903071feedc218c45d74d2 (patch) | |
| tree | 71b54aad3660d2f878318af69ce77455625995f8 /kernel | |
| parent | 469661d0d3a55a7ba1e7cb847c26baf78cace086 (diff) | |
kho: replace kho_preserve_phys() with kho_preserve_pages()
to make it clear that KHO operates on pages rather than on a random
physical address.
The kho_preserve_pages() will be also used in upcoming support for vmalloc
preservation.
Link: https://lkml.kernel.org/r/20250921054458.4043761-3-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Pratyush Yadav <pratyush@kernel.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Cc: Alexander Graf <graf@amazon.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Changyuan Lyu <changyuanl@google.com>
Cc: Chris Li <chrisl@kernel.org>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/kexec_handover.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/kernel/kexec_handover.c b/kernel/kexec_handover.c index b8d0d63f6145..1c44a55f758e 100644 --- a/kernel/kexec_handover.c +++ b/kernel/kexec_handover.c @@ -725,26 +725,23 @@ int kho_preserve_folio(struct folio *folio) EXPORT_SYMBOL_GPL(kho_preserve_folio); /** - * kho_preserve_phys - preserve a physically contiguous range across kexec. - * @phys: physical address of the range. - * @size: size of the range. + * kho_preserve_pages - preserve contiguous pages across kexec + * @page: first page in the list. + * @nr_pages: number of pages. * - * Instructs KHO to preserve the memory range from @phys to @phys + @size - * across kexec. + * Preserve a contiguous list of order 0 pages. Must be restored using + * kho_restore_pages() to ensure the pages are restored properly as order 0. * * Return: 0 on success, error code on failure */ -int kho_preserve_phys(phys_addr_t phys, size_t size) +int kho_preserve_pages(struct page *page, unsigned int nr_pages) { - unsigned long pfn = PHYS_PFN(phys); + struct kho_mem_track *track = &kho_out.ser.track; + const unsigned long start_pfn = page_to_pfn(page); + const unsigned long end_pfn = start_pfn + nr_pages; + unsigned long pfn = start_pfn; unsigned long failed_pfn = 0; - const unsigned long start_pfn = pfn; - const unsigned long end_pfn = PHYS_PFN(phys + size); int err = 0; - struct kho_mem_track *track = &kho_out.ser.track; - - if (!PAGE_ALIGNED(phys) || !PAGE_ALIGNED(size)) - return -EINVAL; while (pfn < end_pfn) { const unsigned int order = @@ -764,7 +761,7 @@ int kho_preserve_phys(phys_addr_t phys, size_t size) return err; } -EXPORT_SYMBOL_GPL(kho_preserve_phys); +EXPORT_SYMBOL_GPL(kho_preserve_pages); /* Handling for debug/kho/out */ |