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path: root/drivers/firmware/efi/libstub/efi-stub-helper.c
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Diffstat (limited to 'drivers/firmware/efi/libstub/efi-stub-helper.c')
-rw-r--r--drivers/firmware/efi/libstub/efi-stub-helper.c33
1 files changed, 14 insertions, 19 deletions
diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index aded10662020..757badc1debb 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -32,15 +32,6 @@
static unsigned long __chunk_size = EFI_READ_CHUNK_SIZE;
-/*
- * Allow the platform to override the allocation granularity: this allows
- * systems that have the capability to run with a larger page size to deal
- * with the allocations for initrd and fdt more efficiently.
- */
-#ifndef EFI_ALLOC_ALIGN
-#define EFI_ALLOC_ALIGN EFI_PAGE_SIZE
-#endif
-
#define EFI_MMAP_NR_SLACK_SLOTS 8
struct file_info {
@@ -186,14 +177,16 @@ efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
goto fail;
/*
- * Enforce minimum alignment that EFI requires when requesting
- * a specific address. We are doing page-based allocations,
- * so we must be aligned to a page.
+ * Enforce minimum alignment that EFI or Linux requires when
+ * requesting a specific address. We are doing page-based (or
+ * larger) allocations, and both the address and size must meet
+ * alignment constraints.
*/
if (align < EFI_ALLOC_ALIGN)
align = EFI_ALLOC_ALIGN;
- nr_pages = round_up(size, EFI_ALLOC_ALIGN) / EFI_PAGE_SIZE;
+ size = round_up(size, EFI_ALLOC_ALIGN);
+ nr_pages = size / EFI_PAGE_SIZE;
again:
for (i = 0; i < map_size / desc_size; i++) {
efi_memory_desc_t *desc;
@@ -208,7 +201,7 @@ again:
continue;
start = desc->phys_addr;
- end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);
+ end = start + desc->num_pages * EFI_PAGE_SIZE;
if (end > max)
end = max;
@@ -278,14 +271,16 @@ efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
goto fail;
/*
- * Enforce minimum alignment that EFI requires when requesting
- * a specific address. We are doing page-based allocations,
- * so we must be aligned to a page.
+ * Enforce minimum alignment that EFI or Linux requires when
+ * requesting a specific address. We are doing page-based (or
+ * larger) allocations, and both the address and size must meet
+ * alignment constraints.
*/
if (align < EFI_ALLOC_ALIGN)
align = EFI_ALLOC_ALIGN;
- nr_pages = round_up(size, EFI_ALLOC_ALIGN) / EFI_PAGE_SIZE;
+ size = round_up(size, EFI_ALLOC_ALIGN);
+ nr_pages = size / EFI_PAGE_SIZE;
for (i = 0; i < map_size / desc_size; i++) {
efi_memory_desc_t *desc;
unsigned long m = (unsigned long)map;
@@ -300,7 +295,7 @@ efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
continue;
start = desc->phys_addr;
- end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);
+ end = start + desc->num_pages * EFI_PAGE_SIZE;
/*
* Don't allocate at 0x0. It will confuse code that