diff options
| author | Jason Miu <jasonmiu@google.com> | 2026-01-05 18:58:38 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-01-26 19:07:12 -0800 |
| commit | ac2d8102c4b88713a8fa371d5d802fcff131d6ac (patch) | |
| tree | bbda04b00ee45d65b2510824d86de899faa2a9b9 /kernel | |
| parent | 5e1ea1e27b6ff237122ac6cb30e0b8ea4618f75f (diff) | |
kho: relocate vmalloc preservation structure to KHO ABI header
The `struct kho_vmalloc` defines the in-memory layout for preserving
vmalloc regions across kexec. This layout is a contract between kernels
and part of the KHO ABI.
To reflect this relationship, the related structs and helper macros are
relocated to the ABI header, `include/linux/kho/abi/kexec_handover.h`.
This move places the structure's definition under the protection of the
KHO_FDT_COMPATIBLE version string.
The structure and its components are now also documented within the ABI
header to describe the contract and prevent ABI breaks.
[rppt@kernel.org: update comment, per Pratyush]
Link: https://lkml.kernel.org/r/aW_Mqp6HcqLwQImS@kernel.org
Link: https://lkml.kernel.org/r/20260105165839.285270-6-rppt@kernel.org
Signed-off-by: Jason Miu <jasonmiu@google.com>
Co-developed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Alexander Graf <graf@amazon.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Pratyush Yadav <pratyush@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/liveupdate/kexec_handover.c | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/kernel/liveupdate/kexec_handover.c b/kernel/liveupdate/kexec_handover.c index 8f57d6e040af..66fcdda0ebdc 100644 --- a/kernel/liveupdate/kexec_handover.c +++ b/kernel/liveupdate/kexec_handover.c @@ -876,21 +876,6 @@ void kho_unpreserve_pages(struct page *page, unsigned int nr_pages) } EXPORT_SYMBOL_GPL(kho_unpreserve_pages); -struct kho_vmalloc_hdr { - DECLARE_KHOSER_PTR(next, struct kho_vmalloc_chunk *); -}; - -#define KHO_VMALLOC_SIZE \ - ((PAGE_SIZE - sizeof(struct kho_vmalloc_hdr)) / \ - sizeof(phys_addr_t)) - -struct kho_vmalloc_chunk { - struct kho_vmalloc_hdr hdr; - phys_addr_t phys[KHO_VMALLOC_SIZE]; -}; - -static_assert(sizeof(struct kho_vmalloc_chunk) == PAGE_SIZE); - /* vmalloc flags KHO supports */ #define KHO_VMALLOC_SUPPORTED_FLAGS (VM_ALLOC | VM_ALLOW_HUGE_VMAP) |