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gptboot.efi: align secbuf to 4K

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The u-boot EFI implementation of the ReadBlocks and WriteBlocks methods
requires that the provided buffer meet the IO alignment requirements of
the underlying disk. Unlike loader.efi, gptboot.efi doesn't check this
requirement, and therefore fails to perform a successful read. Adjust
secbuf's alignment to 4K in hopes that we will always meet this
requirement.

Reviewed by:	imp
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D25111
This commit is contained in:
Mitchell Horne 2020-06-03 16:38:16 +00:00
parent 2cf21ae559
commit cadd7992e2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=361754
1 changed files with 1 additions and 1 deletions
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stand/efi/gptboot/proto.c
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@ -42,7 +42,7 @@ __FBSDID("$FreeBSD$");
#include "gpt.h"
#include <sys/gpt.h>
static const uuid_t freebsd_ufs_uuid = GPT_ENT_TYPE_FREEBSD_UFS;
static char secbuf[4096];
static char secbuf[4096] __aligned(4096);
static struct dsk dsk;
static dev_info_t *devices = NULL;
static dev_info_t *raw_device = NULL;