diff options
| -rw-r--r-- | arch/x86/include/asm/e820.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/e820.c | 16 | ||||
| -rw-r--r-- | arch/x86/kernel/setup.c | 1 | ||||
| -rw-r--r-- | arch/x86/mm/init_64.c | 7 |
4 files changed, 19 insertions, 7 deletions
diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h index 718646384e03..5be1542fbfaf 100644 --- a/arch/x86/include/asm/e820.h +++ b/arch/x86/include/asm/e820.h @@ -117,6 +117,8 @@ extern unsigned long e820_end_of_low_ram_pfn(void); extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align); void memblock_x86_fill(void); +void memblock_find_dma_reserve(void); + extern void finish_e820_parsing(void); extern void e820_reserve_resources(void); extern void e820_reserve_resources_late(void); diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index d5fd89462d79..0c2b7ef7a34d 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -1105,3 +1105,19 @@ void __init memblock_x86_fill(void) memblock_analyze(); memblock_dump_all(); } + +void __init memblock_find_dma_reserve(void) +{ +#ifdef CONFIG_X86_64 + u64 free_size_pfn; + u64 mem_size_pfn; + /* + * need to find out used area below MAX_DMA_PFN + * need to use memblock to get free size in [0, MAX_DMA_PFN] + * at first, and assume boot_mem will not take below MAX_DMA_PFN + */ + mem_size_pfn = memblock_x86_memory_in_range(0, MAX_DMA_PFN << PAGE_SHIFT) >> PAGE_SHIFT; + free_size_pfn = memblock_x86_free_memory_in_range(0, MAX_DMA_PFN << PAGE_SHIFT) >> PAGE_SHIFT; + set_dma_reserve(mem_size_pfn - free_size_pfn); +#endif +} diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index a4f01733e879..924c8f78e98e 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1013,6 +1013,7 @@ void __init setup_arch(char **cmdline_p) #endif initmem_init(0, max_pfn, acpi, k8); + memblock_find_dma_reserve(); #ifndef CONFIG_NO_BOOTMEM memblock_x86_to_bootmem(0, max_low_pfn<<PAGE_SHIFT); #endif diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 592b2368062d..d6d408467c46 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -53,8 +53,6 @@ #include <asm/init.h> #include <linux/bootmem.h> -static unsigned long dma_reserve __initdata; - static int __init parse_direct_gbpages_off(char *arg) { direct_gbpages = 0; @@ -821,11 +819,6 @@ int __init reserve_bootmem_generic(unsigned long phys, unsigned long len, reserve_bootmem(phys, len, flags); - if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) { - dma_reserve += len / PAGE_SIZE; - set_dma_reserve(dma_reserve); - } - return 0; } #endif |
