Now we are using memblock to do early resource reserver/allocation instead of using e820 map directly, and setup_data is reserved in memblock early already. Also kexec will generate setup_data and pass pointer to second kernel, so second kernel will reserve setup_data by their own. We can kill E820_RESERVED_KERN and not touch e820 map at all. That will fix bug in mark_nonsave_region that can not handle that case: E820_RAM and E820_RESERVED_KERN ranges are continuous and boundary is not page aligned. Bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=913885 Reported-by: "Lee, Chun-Yi" <jlee@xxxxxxxx> Tested-by: "Lee, Chun-Yi" <jlee@xxxxxxxx> Cc: "Lee, Chun-Yi" <jlee@xxxxxxxx> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx --- arch/x86/include/uapi/asm/e820.h | 9 --------- arch/x86/kernel/e820.c | 6 ++---- arch/x86/kernel/setup.c | 26 -------------------------- arch/x86/kernel/tboot.c | 3 +-- arch/x86/mm/init_64.c | 11 ++++------- 5 files changed, 7 insertions(+), 48 deletions(-) diff --git a/arch/x86/include/uapi/asm/e820.h b/arch/x86/include/uapi/asm/e820.h index d993e33..edc8a71 100644 --- a/arch/x86/include/uapi/asm/e820.h +++ b/arch/x86/include/uapi/asm/e820.h @@ -33,15 +33,6 @@ #define E820_NVS 4 #define E820_UNUSABLE 5 - -/* - * reserved RAM used by kernel itself - * if CONFIG_INTEL_TXT is enabled, memory of this type will be - * included in the S3 integrity calculation and so should not include - * any memory that BIOS might alter over the S3 transition - */ -#define E820_RESERVED_KERN 128 - #ifndef __ASSEMBLY__ #include <linux/types.h> struct e820entry { diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index 46201de..2a6bed9 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -134,7 +134,6 @@ static void __init e820_print_type(u32 type) { switch (type) { case E820_RAM: - case E820_RESERVED_KERN: printk(KERN_CONT "usable"); break; case E820_RESERVED: @@ -688,7 +687,7 @@ void __init e820_mark_nosave_regions(unsigned long limit_pfn) register_nosave_region(pfn, PFN_UP(ei->addr)); pfn = PFN_DOWN(ei->addr + ei->size); - if (ei->type != E820_RAM && ei->type != E820_RESERVED_KERN) + if (ei->type != E820_RAM) register_nosave_region(PFN_UP(ei->addr), pfn); if (pfn >= limit_pfn) @@ -902,7 +901,6 @@ void __init finish_e820_parsing(void) static inline const char *e820_type_to_string(int e820_type) { switch (e820_type) { - case E820_RESERVED_KERN: case E820_RAM: return "System RAM"; case E820_ACPI: return "ACPI Tables"; case E820_NVS: return "ACPI Non-volatile Storage"; @@ -1077,7 +1075,7 @@ void __init memblock_x86_fill(void) if (end != (resource_size_t)end) continue; - if (ei->type != E820_RAM && ei->type != E820_RESERVED_KERN) + if (ei->type != E820_RAM) continue; memblock_add(ei->addr, ei->size); diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 05d444f..c9b3e2f 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -473,30 +473,6 @@ static void __init parse_setup_data(void) } } -static void __init e820_reserve_setup_data(void) -{ - struct setup_data *data; - u64 pa_data; - int found = 0; - - pa_data = boot_params.hdr.setup_data; - while (pa_data) { - data = early_memremap(pa_data, sizeof(*data)); - e820_update_range(pa_data, sizeof(*data)+data->len, - E820_RAM, E820_RESERVED_KERN); - found = 1; - pa_data = data->next; - early_iounmap(data, sizeof(*data)); - } - if (!found) - return; - - sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); - memcpy(&e820_saved, &e820, sizeof(struct e820map)); - printk(KERN_INFO "extended physical RAM map:\n"); - e820_print_map("reserve setup_data"); -} - static void __init memblock_x86_reserve_range_setup_data(void) { struct setup_data *data; @@ -1032,8 +1008,6 @@ void __init setup_arch(char **cmdline_p) early_dump_pci_devices(); #endif - /* update the e820_saved too */ - e820_reserve_setup_data(); finish_e820_parsing(); if (efi_enabled(EFI_BOOT)) diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c index 91a4496..3c2752a 100644 --- a/arch/x86/kernel/tboot.c +++ b/arch/x86/kernel/tboot.c @@ -195,8 +195,7 @@ static int tboot_setup_sleep(void) tboot->num_mac_regions = 0; for (i = 0; i < e820.nr_map; i++) { - if ((e820.map[i].type != E820_RAM) - && (e820.map[i].type != E820_RESERVED_KERN)) + if (e820.map[i].type != E820_RAM) continue; add_mac_region(e820.map[i].addr, e820.map[i].size); diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 30eb05a..19430d5 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -426,8 +426,7 @@ phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end, next = (addr & PAGE_MASK) + PAGE_SIZE; if (addr >= end) { if (!after_bootmem && - !e820_any_mapped(addr & PAGE_MASK, next, E820_RAM) && - !e820_any_mapped(addr & PAGE_MASK, next, E820_RESERVED_KERN)) + !e820_any_mapped(addr & PAGE_MASK, next, E820_RAM)) set_pte(pte, __pte(0)); continue; } @@ -473,9 +472,8 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end, next = (address & PMD_MASK) + PMD_SIZE; if (address >= end) { - if (!after_bootmem && - !e820_any_mapped(address & PMD_MASK, next, E820_RAM) && - !e820_any_mapped(address & PMD_MASK, next, E820_RESERVED_KERN)) + if (!after_bootmem && !e820_any_mapped( + address & PMD_MASK, next, E820_RAM)) set_pmd(pmd, __pmd(0)); continue; } @@ -548,8 +546,7 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end, next = (addr & PUD_MASK) + PUD_SIZE; if (addr >= end) { if (!after_bootmem && - !e820_any_mapped(addr & PUD_MASK, next, E820_RAM) && - !e820_any_mapped(addr & PUD_MASK, next, E820_RESERVED_KERN)) + !e820_any_mapped(addr & PUD_MASK, next, E820_RAM)) set_pud(pud, __pud(0)); continue; } -- 1.8.4.5 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
