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| author |   Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-06-02 13:52:03 +0000 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2017-06-05 17:50:41 +0200 |
| commit | 2a457fb31df62c6b482f78e4f74aaed99271f44d (patch) | |
| tree | ca361e87b2d0d587942b67279294dcb6e42aa48a /drivers/firmware/efi/capsule.c | |
| parent | efi/capsule-loader: Redirect calls to efi_capsule_setup_info() via weak alias (diff) | |
| download | linux-dev-2a457fb31df62c6b482f78e4f74aaed99271f44d.tar.xz linux-dev-2a457fb31df62c6b482f78e4f74aaed99271f44d.zip | |
efi/capsule-loader: Use page addresses rather than struct page pointers
To give some leeway to code that handles non-standard capsule headers,
let's keep an array of page addresses rather than struct page pointers.
This gives special implementations of efi_capsule_setup_info() the
opportunity to mangle the payload a bit before it is presented to the
firmware, without putting any knowledge of the nature of such quirks
into the generic code.
Tested-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20170602135207.21708-10-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/firmware/efi/capsule.c')
| -rw-r--r-- | drivers/firmware/efi/capsule.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/firmware/efi/capsule.c b/drivers/firmware/efi/capsule.c index e603ccf39d80..901b9306bf94 100644 --- a/drivers/firmware/efi/capsule.c +++ b/drivers/firmware/efi/capsule.c @@ -214,7 +214,7 @@ efi_capsule_update_locked(efi_capsule_header_t *capsule, * * Return 0 on success, a converted EFI status code on failure. */ -int efi_capsule_update(efi_capsule_header_t *capsule, struct page **pages) +int efi_capsule_update(efi_capsule_header_t *capsule, phys_addr_t *pages) { u32 imagesize = capsule->imagesize; efi_guid_t guid = capsule->guid; @@ -249,10 +249,11 @@ int efi_capsule_update(efi_capsule_header_t *capsule, struct page **pages) sglist = kmap(sg_pages[i]); for (j = 0; j < SGLIST_PER_PAGE && count > 0; j++) { - u64 sz = min_t(u64, imagesize, PAGE_SIZE); + u64 sz = min_t(u64, imagesize, + PAGE_SIZE - (u64)*pages % PAGE_SIZE); sglist[j].length = sz; - sglist[j].data = page_to_phys(*pages++); + sglist[j].data = *pages++; imagesize -= sz; count--; |