On 01.10.16 23:32, Stefan Brüns wrote:
> Implementation essentially unchanged, but use EFI_PAGE_MASK/SHIFT
> instead of numeric constants.
Sorry for being nitpicky about the commit message again. Imagine you're
a distribution maintainer for U-Boot and you need to read the commit
messages of all commits in the tree to figure out whether you need to
cherry-pick a patch or not. Or you git bisect down to this commit and
need to figure out what the original intention of this patch was.
How about something like
---
We currently handle efi_allocate_pool() inside of our boot time service
file. In the following patch, pool allocation will receive additional
internal semantics that we should preserve inside efi_memory.c instead.
As foundation for those changes, split the function into an externally
facing helper efi_allocate_pool_ext() for use by payloads and an
internal function efi_allocate_pool() in efi_memory.c that handles the
actual allocation.
While at it, change the magic 0xfff / 12 constants to the more obvious
EFI_PAGE_MASK/SHIFT defines.
---
Alex
>
> Signed-off-by: Stefan Brüns <stefan.bru...@rwth-aachen.de>
> ---
> include/efi_loader.h | 3 +++
> lib/efi_loader/efi_boottime.c | 11 +++++------
> lib/efi_loader/efi_memory.c | 11 +++++++++++
> 3 files changed, 19 insertions(+), 6 deletions(-)
>
> diff --git a/include/efi_loader.h b/include/efi_loader.h
> index 9738835..40e7beb 100644
> --- a/include/efi_loader.h
> +++ b/include/efi_loader.h
> @@ -119,6 +119,9 @@ efi_status_t efi_allocate_pages(int type, int
> memory_type, unsigned long pages,
> uint64_t *memory);
> /* EFI memory free function. Not implemented today */
> efi_status_t efi_free_pages(uint64_t memory, unsigned long pages);
> +/* EFI memory allocator for small allocations, called by EFI payloads */
The function that gets called by EFI payloads is actually the _ext one,
as that's the one that swizzles the gd pointer as well. Just remove the
last bit of the sentence.
> +efi_status_t efi_allocate_pool(int pool_type, unsigned long size,
> + void **buffer);
> /* Returns the EFI memory map */
> efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
> struct efi_mem_desc *memory_map,
> diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
> index 784891b..eb74cb0 100644
> --- a/lib/efi_loader/efi_boottime.c
> +++ b/lib/efi_loader/efi_boottime.c
> @@ -130,15 +130,14 @@ efi_status_t EFIAPI efi_get_memory_map_ext(unsigned
> long *memory_map_size,
> return EFI_EXIT(r);
> }
>
> -static efi_status_t EFIAPI efi_allocate_pool(int pool_type, unsigned long
> size,
> - void **buffer)
> +static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
> + unsigned long size,
> + void **buffer)
> {
> efi_status_t r;
> - efi_physical_addr_t t;
>
> EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
> - r = efi_allocate_pages(0, pool_type, (size + 0xfff) >> 12, &t);
> - *buffer = (void *)(uintptr_t)t;
> + r = efi_allocate_pool(pool_type, size, buffer);
> return EFI_EXIT(r);
> }
>
> @@ -736,7 +735,7 @@ static const struct efi_boot_services efi_boot_services =
> {
> .allocate_pages = efi_allocate_pages_ext,
> .free_pages = efi_free_pages_ext,
> .get_memory_map = efi_get_memory_map_ext,
> - .allocate_pool = efi_allocate_pool,
> + .allocate_pool = efi_allocate_pool_ext,
> .free_pool = efi_free_pool,
> .create_event = efi_create_event,
> .set_timer = efi_set_timer,
> diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
> index 5d71fdf..045558d 100644
> --- a/lib/efi_loader/efi_memory.c
> +++ b/lib/efi_loader/efi_memory.c
> @@ -327,6 +327,17 @@ efi_status_t efi_free_pages(uint64_t memory, unsigned
> long pages)
> return EFI_SUCCESS;
> }
>
> +efi_status_t efi_allocate_pool(int pool_type, unsigned long size,
> + void **buffer)
> +{
> + efi_status_t r;
> + efi_physical_addr_t t;
> + u64 num_pages = (size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;
> +
> + r = efi_allocate_pages(0, pool_type, num_pages, &t);
This is missing the *buffer update, no?
> + return EFI_EXIT(r);
Double EFI_EXIT is fatal. Please just return r here.
Alex
> +}
> +
> efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
> struct efi_mem_desc *memory_map,
> unsigned long *map_key,
>
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