From: Dan Williams Date: Mon, 13 Jan 2020 17:22:42 +0000 (+0100) Subject: efi: Add a flags parameter to efi_memory_map X-Git-Tag: v5.15~4656^2~8 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=26c0e44a213b272abec0e8fba4a5a2801f95208e;p=platform%2Fkernel%2Flinux-starfive.git efi: Add a flags parameter to efi_memory_map In preparation for garbage collecting dynamically allocated EFI memory maps, where the allocation method of memblock vs slab needs to be recalled, convert the existing 'late' flag into a 'flags' bitmask. Arrange for the flag to be passed via 'struct efi_memory_map_data'. This structure grows additional flags in follow-on changes. Signed-off-by: Dan Williams Signed-off-by: Ard Biesheuvel Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/20200113172245.27925-11-ardb@kernel.org --- diff --git a/drivers/firmware/efi/memmap.c b/drivers/firmware/efi/memmap.c index 38b686c..4f98eb1 100644 --- a/drivers/firmware/efi/memmap.c +++ b/drivers/firmware/efi/memmap.c @@ -52,21 +52,20 @@ phys_addr_t __init efi_memmap_alloc(unsigned int num_entries) /** * __efi_memmap_init - Common code for mapping the EFI memory map * @data: EFI memory map data - * @late: Use early or late mapping function? * * This function takes care of figuring out which function to use to * map the EFI memory map in efi.memmap based on how far into the boot * we are. * - * During bootup @late should be %false since we only have access to - * the early_memremap*() functions as the vmalloc space isn't setup. - * Once the kernel is fully booted we can fallback to the more robust - * memremap*() API. + * During bootup EFI_MEMMAP_LATE in data->flags should be clear since we + * only have access to the early_memremap*() functions as the vmalloc + * space isn't setup. Once the kernel is fully booted we can fallback + * to the more robust memremap*() API. * * Returns zero on success, a negative error code on failure. */ static int __init -__efi_memmap_init(struct efi_memory_map_data *data, bool late) +__efi_memmap_init(struct efi_memory_map_data *data) { struct efi_memory_map map; phys_addr_t phys_map; @@ -76,7 +75,7 @@ __efi_memmap_init(struct efi_memory_map_data *data, bool late) phys_map = data->phys_map; - if (late) + if (data->flags & EFI_MEMMAP_LATE) map.map = memremap(phys_map, data->size, MEMREMAP_WB); else map.map = early_memremap(phys_map, data->size); @@ -92,7 +91,7 @@ __efi_memmap_init(struct efi_memory_map_data *data, bool late) map.desc_version = data->desc_version; map.desc_size = data->desc_size; - map.late = late; + map.flags = data->flags; set_bit(EFI_MEMMAP, &efi.flags); @@ -111,9 +110,10 @@ __efi_memmap_init(struct efi_memory_map_data *data, bool late) int __init efi_memmap_init_early(struct efi_memory_map_data *data) { /* Cannot go backwards */ - WARN_ON(efi.memmap.late); + WARN_ON(efi.memmap.flags & EFI_MEMMAP_LATE); - return __efi_memmap_init(data, false); + data->flags = 0; + return __efi_memmap_init(data); } void __init efi_memmap_unmap(void) @@ -121,7 +121,7 @@ void __init efi_memmap_unmap(void) if (!efi_enabled(EFI_MEMMAP)) return; - if (!efi.memmap.late) { + if (!(efi.memmap.flags & EFI_MEMMAP_LATE)) { unsigned long size; size = efi.memmap.desc_size * efi.memmap.nr_map; @@ -162,13 +162,14 @@ int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size) struct efi_memory_map_data data = { .phys_map = addr, .size = size, + .flags = EFI_MEMMAP_LATE, }; /* Did we forget to unmap the early EFI memmap? */ WARN_ON(efi.memmap.map); /* Were we already called? */ - WARN_ON(efi.memmap.late); + WARN_ON(efi.memmap.flags & EFI_MEMMAP_LATE); /* * It makes no sense to allow callers to register different @@ -178,7 +179,7 @@ int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size) data.desc_version = efi.memmap.desc_version; data.desc_size = efi.memmap.desc_size; - return __efi_memmap_init(&data, true); + return __efi_memmap_init(&data); } /** @@ -195,6 +196,7 @@ int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size) int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map) { struct efi_memory_map_data data; + unsigned long flags; efi_memmap_unmap(); @@ -202,8 +204,9 @@ int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map) data.size = efi.memmap.desc_size * nr_map; data.desc_version = efi.memmap.desc_version; data.desc_size = efi.memmap.desc_size; + data.flags = efi.memmap.flags & EFI_MEMMAP_LATE; - return __efi_memmap_init(&data, efi.memmap.late); + return __efi_memmap_init(&data); } /** diff --git a/include/linux/efi.h b/include/linux/efi.h index 7e8e25b..f117d68 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -767,6 +767,7 @@ struct efi_memory_map_data { unsigned long size; unsigned long desc_version; unsigned long desc_size; + unsigned long flags; }; struct efi_memory_map { @@ -776,7 +777,8 @@ struct efi_memory_map { int nr_map; unsigned long desc_version; unsigned long desc_size; - bool late; +#define EFI_MEMMAP_LATE (1UL << 0) + unsigned long flags; }; struct efi_mem_range {