The functions to add a memory region to the EFI memory map have a variable, overlap_only_ram, which is used to indicate if a new memory region needs to be carved out from the free, or conventional memory. The name overlap_only_ram is a bit confusing, as other allocated memory regions, like boot-services code and data are also part of the RAM memory. Rename the variable to highlight the fact that it is the free/conventional memory that is being referred to in this context.
Signed-off-by: Sughosh Ganu sughosh.ganu@linaro.org --- Changes since V1: New patch
include/efi_loader.h | 16 +++++++----- lib/efi_loader/efi_memory.c | 51 ++++++++++++++++++++----------------- 2 files changed, 37 insertions(+), 30 deletions(-)
diff --git a/include/efi_loader.h b/include/efi_loader.h index 0d5555c7597..c3512c63a50 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -788,15 +788,17 @@ efi_status_t efi_add_memory_map(u64 start, u64 size, int memory_type); /** * efi_add_memory_map_pg() - add pages to the memory map * - * @start: start address, must be a multiple of EFI_PAGE_SIZE - * @pages: number of pages to add - * @memory_type: type of memory added - * @overlap_only_ram: region may only overlap RAM - * Return: status code + * @start: start address, must be a multiple of + * EFI_PAGE_SIZE + * @pages: number of pages to add + * @memory_type: type of memory added + * @overlap_only_freemem: region may only overlap free(conventional) + * memory + * Return: status code */ efi_status_t efi_add_memory_map_pg(u64 start, u64 pages, - int memory_type, - bool overlap_only_ram); + int memory_type, + bool overlap_only_freemem);
/* Called by board init to initialize the EFI drivers */ efi_status_t efi_driver_init(void); diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c index 0f25094dbf8..97b89a97a2e 100644 --- a/lib/efi_loader/efi_memory.c +++ b/lib/efi_loader/efi_memory.c @@ -173,17 +173,19 @@ static void efi_mem_sort(void) /** * efi_mem_carve_out() - unmap memory region * - * @map: memory map - * @carve_desc: memory region to unmap - * @overlap_only_ram: the carved out region may only overlap RAM - * Return: the number of overlapping pages which have been - * removed from the map, - * EFI_CARVE_NO_OVERLAP, if the regions don't overlap, - * EFI_CARVE_OVERLAPS_NONRAM, if the carve and map overlap, - * and the map contains anything but free ram - * (only when overlap_only_ram is true), - * EFI_CARVE_LOOP_AGAIN, if the mapping list should be - * traversed again, as it has been altered. + * @map: memory map + * @carve_desc: memory region to unmap + * @overlap_only_freemem: the carved out region may only overlap free, + * or conventional memory + * Return: the number of overlapping pages which have been + * removed from the map, + * EFI_CARVE_NO_OVERLAP, if the regions don't + * overlap, EFI_CARVE_OVERLAPS_NONRAM, if the carve + * and map overlap, and the map contains anything + * but free ram(only when overlap_only_freemem is + * true), + * EFI_CARVE_LOOP_AGAIN, if the mapping list should + * be traversed again, as it has been altered. * * Unmaps all memory occupied by the carve_desc region from the list entry * pointed to by map. @@ -193,7 +195,7 @@ static void efi_mem_sort(void) */ static s64 efi_mem_carve_out(struct efi_mem_list *map, struct efi_mem_desc *carve_desc, - bool overlap_only_ram) + bool overlap_only_freemem) { struct efi_mem_list *newmap; struct efi_mem_desc *map_desc = &map->desc; @@ -208,7 +210,7 @@ static s64 efi_mem_carve_out(struct efi_mem_list *map, return EFI_CARVE_NO_OVERLAP;
/* We're overlapping with non-RAM, warn the caller if desired */ - if (overlap_only_ram && (map_desc->type != EFI_CONVENTIONAL_MEMORY)) + if (overlap_only_freemem && (map_desc->type != EFI_CONVENTIONAL_MEMORY)) return EFI_CARVE_OVERLAPS_NONRAM;
/* Sanitize carve_start and carve_end to lie within our bounds */ @@ -258,15 +260,17 @@ static s64 efi_mem_carve_out(struct efi_mem_list *map, /** * efi_add_memory_map_pg() - add pages to the memory map * - * @start: start address, must be a multiple of EFI_PAGE_SIZE - * @pages: number of pages to add - * @memory_type: type of memory added - * @overlap_only_ram: region may only overlap RAM - * Return: status code + * @start: start address, must be a multiple of + * EFI_PAGE_SIZE + * @pages: number of pages to add + * @memory_type: type of memory added + * @overlap_only_freemem: region may only overlap free(conventional) + * memory + * Return: status code */ efi_status_t efi_add_memory_map_pg(u64 start, u64 pages, - int memory_type, - bool overlap_only_ram) + int memory_type, + bool overlap_only_freemem) { struct efi_mem_list *lmem; struct efi_mem_list *newlist; @@ -275,7 +279,8 @@ efi_status_t efi_add_memory_map_pg(u64 start, u64 pages, struct efi_event *evt;
EFI_PRINT("%s: 0x%llx 0x%llx %d %s\n", __func__, - start, pages, memory_type, overlap_only_ram ? "yes" : "no"); + start, pages, memory_type, overlap_only_freemem ? + "yes" : "no");
if (memory_type >= EFI_MAX_MEMORY_TYPE) return EFI_INVALID_PARAMETER; @@ -312,7 +317,7 @@ efi_status_t efi_add_memory_map_pg(u64 start, u64 pages, s64 r;
r = efi_mem_carve_out(lmem, &newlist->desc, - overlap_only_ram); + overlap_only_freemem); switch (r) { case EFI_CARVE_OUT_OF_RESOURCES: free(newlist); @@ -348,7 +353,7 @@ efi_status_t efi_add_memory_map_pg(u64 start, u64 pages, } } while (carve_again);
- if (overlap_only_ram && (carved_pages != pages)) { + if (overlap_only_freemem && (carved_pages != pages)) { /* * The payload wanted to have RAM overlaps, but we overlapped * with an unallocated region. Error out.