From c8a8f0196bdb068f07a5565bf4ce5f43f5003f6e Mon Sep 17 00:00:00 2001 From: Sughosh Ganu Date: Tue, 15 Oct 2024 21:07:03 +0530 Subject: lmb: add versions of the lmb API with flags The LMB module is to be used as a backend for allocating and freeing up memory requested from other modules like EFI. These memory requests are different from the typical LMB reservations in that memory required by the EFI module cannot be overwritten, or re-requested. Add versions of the LMB API functions with flags for allocating and freeing up memory. The caller can then use these API's for specifying the type of memory that is required. For now, these functions will be used by the EFI memory module. Signed-off-by: Sughosh Ganu Reviewed-by: Simon Glass --- include/lmb.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) (limited to 'include') diff --git a/include/lmb.h b/include/lmb.h index aee2f9fcdaa..0e8426f4379 100644 --- a/include/lmb.h +++ b/include/lmb.h @@ -90,6 +90,50 @@ phys_addr_t lmb_alloc_base(phys_size_t size, ulong align, phys_addr_t max_addr); phys_addr_t lmb_alloc_addr(phys_addr_t base, phys_size_t size); phys_size_t lmb_get_free_size(phys_addr_t addr); +/** + * lmb_alloc_flags() - Allocate memory region with specified attributes + * @size: Size of the region requested + * @align: Alignment of the memory region requested + * @flags: Memory region attributes to be set + * + * Allocate a region of memory with the attributes specified through the + * parameter. + * + * Return: base address on success, 0 on error + */ +phys_addr_t lmb_alloc_flags(phys_size_t size, ulong align, uint flags); + +/** + * lmb_alloc_base_flags() - Allocate specified memory region with specified attributes + * @size: Size of the region requested + * @align: Alignment of the memory region requested + * @max_addr: Maximum address of the requested region + * @flags: Memory region attributes to be set + * + * Allocate a region of memory with the attributes specified through the + * parameter. The max_addr parameter is used to specify the maximum address + * below which the requested region should be allocated. + * + * Return: base address on success, 0 on error + */ +phys_addr_t lmb_alloc_base_flags(phys_size_t size, ulong align, + phys_addr_t max_addr, uint flags); + +/** + * lmb_alloc_addr_flags() - Allocate specified memory address with specified attributes + * @base: Base Address requested + * @size: Size of the region requested + * @flags: Memory region attributes to be set + * + * Allocate a region of memory with the attributes specified through the + * parameter. The base parameter is used to specify the base address + * of the requested region. + * + * Return: base address on success, 0 on error + */ +phys_addr_t lmb_alloc_addr_flags(phys_addr_t base, phys_size_t size, + uint flags); + /** * lmb_is_reserved_flags() - test if address is in reserved region with flag bits set * @@ -102,6 +146,18 @@ phys_size_t lmb_get_free_size(phys_addr_t addr); */ int lmb_is_reserved_flags(phys_addr_t addr, int flags); +/** + * lmb_free_flags() - Free up a region of memory + * @base: Base Address of region to be freed + * @size: Size of the region to be freed + * @flags: Memory region attributes + * + * Free up a region of memory. + * + * Return: 0 if successful, -1 on failure + */ +long lmb_free_flags(phys_addr_t base, phys_size_t size, uint flags); + long lmb_free(phys_addr_t base, phys_size_t size); void lmb_dump_all(void); -- cgit v1.3.1 From 3c6896ad2fb876b0a23202f62a83c0d44380c9ea Mon Sep 17 00:00:00 2001 From: Sughosh Ganu Date: Tue, 15 Oct 2024 21:07:04 +0530 Subject: lmb: add a flag to allow suppressing memory map change notification Add a flag LMB_NONOTIFY that can be passed to the LMB API's for reserving memory. This will then result in no notification being sent from the LMB module for the changes to the LMB's memory map. While here, also add a description of the memory attributes that the flags signify. Signed-off-by: Sughosh Ganu --- include/lmb.h | 3 +++ lib/lmb.c | 2 +- 2 files changed, 4 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/lmb.h b/include/lmb.h index 0e8426f4379..ec477c1f51d 100644 --- a/include/lmb.h +++ b/include/lmb.h @@ -18,11 +18,14 @@ * enum lmb_flags - definition of memory region attributes * @LMB_NONE: no special request * @LMB_NOMAP: don't add to mmu configuration + * @LMB_NOOVERWRITE: the memory region cannot be overwritten/re-reserved + * @LMB_NONOTIFY: do not notify other modules of changes to this memory region */ enum lmb_flags { LMB_NONE = 0, LMB_NOMAP = BIT(1), LMB_NOOVERWRITE = BIT(2), + LMB_NONOTIFY = BIT(3), }; /** diff --git a/lib/lmb.c b/lib/lmb.c index a38537af9c3..e1e616679f0 100644 --- a/lib/lmb.c +++ b/lib/lmb.c @@ -30,7 +30,7 @@ static struct lmb lmb; static void lmb_print_region_flags(enum lmb_flags flags) { u64 bitpos; - const char *flag_str[] = { "none", "no-map", "no-overwrite" }; + const char *flag_str[] = { "none", "no-map", "no-overwrite", "no-notify" }; do { bitpos = flags ? fls(flags) - 1 : 0; -- cgit v1.3.1 From 2f6191526a1325b6ddb59795a093eca69dbf8976 Mon Sep 17 00:00:00 2001 From: Sughosh Ganu Date: Tue, 15 Oct 2024 21:07:07 +0530 Subject: lmb: notify of any changes to the LMB memory map In U-Boot, LMB and EFI are two primary modules who provide memory allocation and reservation API's. Both these modules operate with the same regions of memory for allocations. Use the LMB memory map update event to notify other interested listeners about a change in it's memory map. This can then be used by the other module to keep track of available and used memory. There is no need to send these notifications when the LMB module is being unit-tested. Add a flag to the lmb structure to indicate if the memory map is being used for tests, and suppress sending any notifications when running these unit tests. Signed-off-by: Sughosh Ganu --- include/efi_loader.h | 14 ++++++ include/lmb.h | 2 + lib/efi_loader/efi_memory.c | 2 +- lib/lmb.c | 104 +++++++++++++++++++++++++++++++++++++++----- 4 files changed, 109 insertions(+), 13 deletions(-) (limited to 'include') diff --git a/include/efi_loader.h b/include/efi_loader.h index 511281e150e..ac203957181 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -784,6 +784,20 @@ efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size, uint32_t *descriptor_version); /* Adds a range into the EFI memory map */ 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 + */ +efi_status_t efi_add_memory_map_pg(u64 start, u64 pages, + int memory_type, + bool overlap_only_ram); + /* Adds a conventional range into the EFI memory map */ efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end, u64 ram_top); diff --git a/include/lmb.h b/include/lmb.h index ec477c1f51d..837002121d9 100644 --- a/include/lmb.h +++ b/include/lmb.h @@ -46,10 +46,12 @@ struct lmb_region { * * @free_mem: List of free memory regions * @used_mem: List of used/reserved memory regions + * @test: Is structure being used for LMB tests */ struct lmb { struct alist free_mem; struct alist used_mem; + bool test; }; /** diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c index aa1da21f9f9..41501e9d41b 100644 --- a/lib/efi_loader/efi_memory.c +++ b/lib/efi_loader/efi_memory.c @@ -264,7 +264,7 @@ static s64 efi_mem_carve_out(struct efi_mem_list *map, * @overlap_only_ram: region may only overlap RAM * Return: status code */ -static efi_status_t efi_add_memory_map_pg(u64 start, u64 pages, +efi_status_t efi_add_memory_map_pg(u64 start, u64 pages, int memory_type, bool overlap_only_ram) { diff --git a/lib/lmb.c b/lib/lmb.c index 0504a7b3407..e7167f858f0 100644 --- a/lib/lmb.c +++ b/lib/lmb.c @@ -8,6 +8,7 @@ #include #include +#include #include #include #include @@ -22,11 +23,52 @@ DECLARE_GLOBAL_DATA_PTR; +#define MAP_OP_RESERVE (u8)0x1 +#define MAP_OP_FREE (u8)0x2 +#define MAP_OP_ADD (u8)0x3 + #define LMB_ALLOC_ANYWHERE 0 #define LMB_ALIST_INITIAL_SIZE 4 static struct lmb lmb; +static bool lmb_should_notify(enum lmb_flags flags) +{ + return !lmb.test && !(flags & LMB_NONOTIFY) && + CONFIG_IS_ENABLED(EFI_LOADER); +} + +static int __maybe_unused lmb_map_update_notify(phys_addr_t addr, + phys_size_t size, + u8 op) +{ + u64 efi_addr; + u64 pages; + efi_status_t status; + + if (op != MAP_OP_RESERVE && op != MAP_OP_FREE && op != MAP_OP_ADD) { + log_err("Invalid map update op received (%d)\n", op); + return -1; + } + + efi_addr = (uintptr_t)map_sysmem(addr, 0); + pages = efi_size_in_pages(size + (efi_addr & EFI_PAGE_MASK)); + efi_addr &= ~EFI_PAGE_MASK; + + status = efi_add_memory_map_pg(efi_addr, pages, + op == MAP_OP_RESERVE ? + EFI_BOOT_SERVICES_DATA : + EFI_CONVENTIONAL_MEMORY, + false); + if (status != EFI_SUCCESS) { + log_err("%s: LMB Map notify failure %lu\n", __func__, + status & ~EFI_ERROR_MASK); + return -1; + } else { + return 0; + } +} + static void lmb_print_region_flags(enum lmb_flags flags) { u64 bitpos; @@ -473,9 +515,17 @@ static long lmb_add_region(struct alist *lmb_rgn_lst, phys_addr_t base, /* This routine may be called with relocation disabled. */ long lmb_add(phys_addr_t base, phys_size_t size) { + long ret; struct alist *lmb_rgn_lst = &lmb.free_mem; - return lmb_add_region(lmb_rgn_lst, base, size); + ret = lmb_add_region(lmb_rgn_lst, base, size); + if (ret) + return ret; + + if (lmb_should_notify(LMB_NONE)) + return lmb_map_update_notify(base, size, MAP_OP_ADD); + + return 0; } static long __lmb_free(phys_addr_t base, phys_size_t size) @@ -529,11 +579,6 @@ static long __lmb_free(phys_addr_t base, phys_size_t size) rgn[i].flags); } -long lmb_free(phys_addr_t base, phys_size_t size) -{ - return __lmb_free(base, size); -} - /** * lmb_free_flags() - Free up a region of memory * @base: Base Address of region to be freed @@ -545,16 +590,38 @@ long lmb_free(phys_addr_t base, phys_size_t size) * Return: 0 if successful, -1 on failure */ long lmb_free_flags(phys_addr_t base, phys_size_t size, - __always_unused uint flags) + uint flags) { - return __lmb_free(base, size); + long ret; + + ret = __lmb_free(base, size); + if (ret < 0) + return ret; + + if (lmb_should_notify(flags)) + return lmb_map_update_notify(base, size, MAP_OP_FREE); + + return ret; +} + +long lmb_free(phys_addr_t base, phys_size_t size) +{ + return lmb_free_flags(base, size, LMB_NONE); } long lmb_reserve_flags(phys_addr_t base, phys_size_t size, enum lmb_flags flags) { + long ret = 0; struct alist *lmb_rgn_lst = &lmb.used_mem; - return lmb_add_region_flags(lmb_rgn_lst, base, size, flags); + ret = lmb_add_region_flags(lmb_rgn_lst, base, size, flags); + if (ret < 0) + return -1; + + if (lmb_should_notify(flags)) + return lmb_map_update_notify(base, size, MAP_OP_RESERVE); + + return ret; } long lmb_reserve(phys_addr_t base, phys_size_t size) @@ -586,6 +653,8 @@ static phys_addr_t lmb_align_down(phys_addr_t addr, phys_size_t size) static phys_addr_t __lmb_alloc_base(phys_size_t size, ulong align, phys_addr_t max_addr, enum lmb_flags flags) { + u8 op; + int ret; long i, rgn; phys_addr_t base = 0; phys_addr_t res_base; @@ -616,6 +685,15 @@ static phys_addr_t __lmb_alloc_base(phys_size_t size, ulong align, if (lmb_add_region_flags(&lmb.used_mem, base, size, flags) < 0) return 0; + + if (lmb_should_notify(flags)) { + op = MAP_OP_RESERVE; + ret = lmb_map_update_notify(base, size, + op); + if (ret) + return ret; + } + return base; } @@ -785,7 +863,7 @@ int lmb_is_reserved_flags(phys_addr_t addr, int flags) return 0; } -static int lmb_setup(void) +static int lmb_setup(bool test) { bool ret; @@ -803,6 +881,8 @@ static int lmb_setup(void) return -ENOMEM; } + lmb.test = test; + return 0; } @@ -822,7 +902,7 @@ int lmb_init(void) { int ret; - ret = lmb_setup(); + ret = lmb_setup(false); if (ret) { log_info("Unable to init LMB\n"); return ret; @@ -850,7 +930,7 @@ int lmb_push(struct lmb *store) int ret; *store = lmb; - ret = lmb_setup(); + ret = lmb_setup(true); if (ret) return ret; -- cgit v1.3.1 From 497da0c5ce9084fed8166b18b4f1f9dbe1532034 Mon Sep 17 00:00:00 2001 From: Sughosh Ganu Date: Tue, 15 Oct 2024 21:07:11 +0530 Subject: lmb: allow for boards to specify memory map Some architectures have special or unique aspects which need consideration when adding memory ranges to the list of available memory map. Enable this config in such scenarios which allow architectures and boards to define their own memory map. Signed-off-by: Sughosh Ganu --- include/lmb.h | 2 ++ lib/Kconfig | 18 ++++++++++++++++++ lib/lmb.c | 3 +++ 3 files changed, 23 insertions(+) (limited to 'include') diff --git a/include/lmb.h b/include/lmb.h index 837002121d9..e46abf400c6 100644 --- a/include/lmb.h +++ b/include/lmb.h @@ -168,6 +168,8 @@ long lmb_free(phys_addr_t base, phys_size_t size); void lmb_dump_all(void); void lmb_dump_all_force(void); +void lmb_arch_add_memory(void); + struct lmb *lmb_get(void); int lmb_push(struct lmb *store); void lmb_pop(struct lmb *store); diff --git a/lib/Kconfig b/lib/Kconfig index 67a60160dac..3d2011ad4b7 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -1119,6 +1119,24 @@ config SPL_LMB SPL. This will require a malloc() implementation for defining the data structures needed for maintaining the LMB memory map. +config LMB_ARCH_MEM_MAP + bool "Add an architecture specific memory map" + depends on LMB + help + Some architectures have special or unique aspects which need + consideration when adding memory ranges to the list of available + memory map. Enable this config in such scenarios which allow + architectures and boards to define their own memory map. + +config SPL_LMB_ARCH_MEM_MAP + bool "Add an architecture specific memory map" + depends on SPL_LMB + help + Some architectures have special or unique scenarios which need + consideration when adding memory ranges to the list of available + memory map. Enable this config in such scenarios which allow + architectures and boards to define their own memory map. + config PHANDLE_CHECK_SEQ bool "Enable phandle check while getting sequence number" help diff --git a/lib/lmb.c b/lib/lmb.c index e7167f858f0..ae69201d5b7 100644 --- a/lib/lmb.c +++ b/lib/lmb.c @@ -326,6 +326,9 @@ void lmb_add_memory(void) u64 ram_top = gd->ram_top; struct bd_info *bd = gd->bd; + if (CONFIG_IS_ENABLED(LMB_ARCH_MEM_MAP)) + return lmb_arch_add_memory(); + /* Assume a 4GB ram_top if not defined */ if (!ram_top) ram_top = 0x100000000ULL; -- cgit v1.3.1 From e1b6822d6522d94d579d53092342b542d368a04b Mon Sep 17 00:00:00 2001 From: Sughosh Ganu Date: Tue, 15 Oct 2024 21:07:14 +0530 Subject: efi_memory: do not add RAM memory to the memory map The EFI_CONVENTIONAL_MEMORY type, which is the usable RAM memory is now being managed by the LMB module. Remove the addition of this memory type to the EFI memory map. This memory now gets added to the EFI memory map as part of the LMB memory map update event handler. Signed-off-by: Sughosh Ganu Reviewed-by: Simon Glass Reviewed-by: Ilias Apalodimas --- include/efi_loader.h | 13 ++++---- lib/efi_loader/efi_memory.c | 77 ++++----------------------------------------- 2 files changed, 13 insertions(+), 77 deletions(-) (limited to 'include') diff --git a/include/efi_loader.h b/include/efi_loader.h index ac203957181..6b9a66a06c0 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -798,10 +798,6 @@ efi_status_t efi_add_memory_map_pg(u64 start, u64 pages, int memory_type, bool overlap_only_ram); -/* Adds a conventional range into the EFI memory map */ -efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end, - u64 ram_top); - /* Called by board init to initialize the EFI drivers */ efi_status_t efi_driver_init(void); /* Called when a block device is added */ @@ -1186,9 +1182,14 @@ efi_status_t efi_console_get_u16_string efi_status_t efi_disk_get_device_name(const efi_handle_t handle, char *buf, int size); /** - * efi_add_known_memory() - add memory banks to EFI memory map + * efi_add_known_memory() - add memory types to the EFI memory map + * + * This function is to be used to add different memory types other + * than EFI_CONVENTIONAL_MEMORY to the EFI memory map. The conventional + * memory is handled by the LMB module and gets added to the memory + * map through the LMB module. * - * This weak function may be overridden for specific architectures. + * This function may be overridden for architectures specific purposes. */ void efi_add_known_memory(void); diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c index 16e64987af7..f59f7780e92 100644 --- a/lib/efi_loader/efi_memory.c +++ b/lib/efi_loader/efi_memory.c @@ -783,82 +783,17 @@ efi_status_t efi_get_memory_map_alloc(efi_uintn_t *map_size, } /** - * efi_add_conventional_memory_map() - add a RAM memory area to the map + * efi_add_known_memory() - add memory types to the EFI memory map * - * @ram_start: start address of a RAM memory area - * @ram_end: end address of a RAM memory area - * @ram_top: max address to be used as conventional memory - * Return: status code - */ -efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end, - u64 ram_top) -{ - u64 pages; - - /* Remove partial pages */ - ram_end &= ~EFI_PAGE_MASK; - ram_start = (ram_start + EFI_PAGE_MASK) & ~EFI_PAGE_MASK; - - if (ram_end <= ram_start) { - /* Invalid mapping */ - return EFI_INVALID_PARAMETER; - } - - pages = (ram_end - ram_start) >> EFI_PAGE_SHIFT; - - efi_add_memory_map_pg(ram_start, pages, - EFI_CONVENTIONAL_MEMORY, false); - - /* - * Boards may indicate to the U-Boot memory core that they - * can not support memory above ram_top. Let's honor this - * in the efi_loader subsystem too by declaring any memory - * above ram_top as "already occupied by firmware". - */ - if (ram_top < ram_start) { - /* ram_top is before this region, reserve all */ - efi_add_memory_map_pg(ram_start, pages, - EFI_BOOT_SERVICES_DATA, true); - } else if (ram_top < ram_end) { - /* ram_top is inside this region, reserve parts */ - pages = (ram_end - ram_top) >> EFI_PAGE_SHIFT; - - efi_add_memory_map_pg(ram_top, pages, - EFI_BOOT_SERVICES_DATA, true); - } - - return EFI_SUCCESS; -} - -/** - * efi_add_known_memory() - add memory banks to map + * This function is to be used to add different memory types other + * than EFI_CONVENTIONAL_MEMORY to the EFI memory map. The conventional + * memory is handled by the LMB module and gets added to the memory + * map through the LMB module. * - * This function may be overridden for specific architectures. + * This function may be overridden for architectures specific purposes. */ __weak void efi_add_known_memory(void) { - u64 ram_top = gd->ram_top & ~EFI_PAGE_MASK; - int i; - - /* - * ram_top is just outside mapped memory. So use an offset of one for - * mapping the sandbox address. - */ - ram_top = (uintptr_t)map_sysmem(ram_top - 1, 0) + 1; - - /* Fix for 32bit targets with ram_top at 4G */ - if (!ram_top) - ram_top = 0x100000000ULL; - - /* Add RAM */ - for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { - u64 ram_end, ram_start; - - ram_start = (uintptr_t)map_sysmem(gd->bd->bi_dram[i].start, 0); - ram_end = ram_start + gd->bd->bi_dram[i].size; - - efi_add_conventional_memory_map(ram_start, ram_end, ram_top); - } } /** -- cgit v1.3.1 From f3fe3232a50a1b28efcce0b81d00b1024f265a12 Mon Sep 17 00:00:00 2001 From: Sughosh Ganu Date: Tue, 15 Oct 2024 21:07:16 +0530 Subject: efi_memory: rename variable to highlight overlap with free memory The variable overlap_only_ram is used to specify that the new memory region that is being created needs to come from the free memory pool -- this is done by carving out the memory region from the free memory. The name is a bit confusing though, as other allocated memory regions, like boot-services code and data are also part of the RAM memory. Rename the variable to overlap_conventional to highlight the fact that it is the free/conventional memory that is being referred to in this context. Signed-off-by: Sughosh Ganu Reviewed-by: Ilias Apalodimas Reviewed-by: Simon Glass --- include/efi_loader.h | 16 +++++++------- lib/efi_loader/efi_memory.c | 51 +++++++++++++++++++++++++-------------------- 2 files changed, 37 insertions(+), 30 deletions(-) (limited to 'include') diff --git a/include/efi_loader.h b/include/efi_loader.h index 6b9a66a06c0..291eca5c077 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_conventional: 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_conventional); /* 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 f59f7780e92..b63b5cca71e 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_conventional: 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_conventional 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_conventional) { 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_conventional && (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_conventional: 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_conventional) { 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_conventional ? + "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_conventional); 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_conventional && (carved_pages != pages)) { /* * The payload wanted to have RAM overlaps, but we overlapped * with an unallocated region. Error out. -- cgit v1.3.1