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efi_loader: macro efi_size_in_pages()

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When allocating EFI memory pages the size in bytes has to be converted to
pages.

Provide a macro efi_size_in_pages() for this conversion.
Use it in the EFI subsystem and correct related comments.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-11-18 17:58:49 +01:00 • committed by Alexander Graf
parent 42910ff1ba
commit c3772ca1e3
3 changed files with 19 additions and 13 deletions
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6
lib/efi_loader/efi_memory.c
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@ -397,7 +397,7 @@ efi_status_t efi_allocate_pages(int type, int memory_type,
void *efi_alloc(uint64_t len, int memory_type)
{
uint64_t ret = 0;
uint64_t pages = (len + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;
uint64_t pages = efi_size_in_pages(len);
efi_status_t r;
r = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES, memory_type, pages,
@ -440,8 +440,8 @@ efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size, void **buffer)
{
efi_status_t r;
struct efi_pool_allocation *alloc;
u64 num_pages = (size + sizeof(struct efi_pool_allocation) +
EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;
u64 num_pages = efi_size_in_pages(size +
sizeof(struct efi_pool_allocation));
if (!buffer)
return EFI_INVALID_PARAMETER;