diff options
| -rw-r--r-- | arch/x86/kernel/setup.c | 2 | ||||
| -rw-r--r-- | arch/x86/xen/setup.c | 28 | ||||
| -rw-r--r-- | drivers/firmware/iscsi_ibft_find.c | 26 | ||||
| -rw-r--r-- | include/linux/iscsi_ibft.h | 10 |
4 files changed, 46 insertions, 20 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 16babff771bd..616b80507abd 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -796,7 +796,6 @@ static void __init early_reserve_memory(void) memblock_x86_reserve_range_setup_data(); - reserve_ibft_region(); reserve_bios_regions(); trim_snb_memory(); } @@ -1032,6 +1031,7 @@ void __init setup_arch(char **cmdline_p) if (efi_enabled(EFI_BOOT)) efi_init(); + reserve_ibft_region(); dmi_setup(); /* diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index c2be3efb2ba0..8b5cf7bb1f47 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -6,6 +6,7 @@ */ #include <linux/init.h> +#include <linux/iscsi_ibft.h> #include <linux/sched.h> #include <linux/kstrtox.h> #include <linux/mm.h> @@ -764,17 +765,26 @@ char * __init xen_memory_setup(void) BUG_ON(memmap.nr_entries == 0); xen_e820_table.nr_entries = memmap.nr_entries; - /* - * Xen won't allow a 1:1 mapping to be created to UNUSABLE - * regions, so if we're using the machine memory map leave the - * region as RAM as it is in the pseudo-physical map. - * - * UNUSABLE regions in domUs are not handled and will need - * a patch in the future. - */ - if (xen_initial_domain()) + if (xen_initial_domain()) { + /* + * Xen won't allow a 1:1 mapping to be created to UNUSABLE + * regions, so if we're using the machine memory map leave the + * region as RAM as it is in the pseudo-physical map. + * + * UNUSABLE regions in domUs are not handled and will need + * a patch in the future. + */ xen_ignore_unusable(); +#ifdef CONFIG_ISCSI_IBFT_FIND + /* Reserve 0.5 MiB to 1 MiB region so iBFT can be found */ + xen_e820_table.entries[xen_e820_table.nr_entries].addr = IBFT_START; + xen_e820_table.entries[xen_e820_table.nr_entries].size = IBFT_END - IBFT_START; + xen_e820_table.entries[xen_e820_table.nr_entries].type = E820_TYPE_RESERVED; + xen_e820_table.nr_entries++; +#endif + } + /* Make sure the Xen-supplied memory map is well-ordered. */ e820__update_table(&xen_e820_table); diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c index 94b49ccd23ac..71f51303c2ba 100644 --- a/drivers/firmware/iscsi_ibft_find.c +++ b/drivers/firmware/iscsi_ibft_find.c @@ -42,8 +42,6 @@ static const struct { }; #define IBFT_SIGN_LEN 4 -#define IBFT_START 0x80000 /* 512kB */ -#define IBFT_END 0x100000 /* 1MB */ #define VGA_MEM 0xA0000 /* VGA buffer */ #define VGA_SIZE 0x20000 /* 128kB */ @@ -52,9 +50,9 @@ static const struct { */ void __init reserve_ibft_region(void) { - unsigned long pos; + unsigned long pos, virt_pos = 0; unsigned int len = 0; - void *virt; + void *virt = NULL; int i; ibft_phys_addr = 0; @@ -70,13 +68,20 @@ void __init reserve_ibft_region(void) * so skip that area */ if (pos == VGA_MEM) pos += VGA_SIZE; - virt = isa_bus_to_virt(pos); + + /* Map page by page */ + if (offset_in_page(pos) == 0) { + if (virt) + early_memunmap(virt, PAGE_SIZE); + virt = early_memremap_ro(pos, PAGE_SIZE); + virt_pos = pos; + } for (i = 0; i < ARRAY_SIZE(ibft_signs); i++) { - if (memcmp(virt, ibft_signs[i].sign, IBFT_SIGN_LEN) == - 0) { + if (memcmp(virt + (pos - virt_pos), ibft_signs[i].sign, + IBFT_SIGN_LEN) == 0) { unsigned long *addr = - (unsigned long *)isa_bus_to_virt(pos + 4); + (unsigned long *)(virt + pos - virt_pos + 4); len = *addr; /* if the length of the table extends past 1M, * the table cannot be valid. */ @@ -84,9 +89,12 @@ void __init reserve_ibft_region(void) ibft_phys_addr = pos; memblock_reserve(ibft_phys_addr, PAGE_ALIGN(len)); pr_info("iBFT found at %pa.\n", &ibft_phys_addr); - return; + goto out; } } } } + +out: + early_memunmap(virt, PAGE_SIZE); } diff --git a/include/linux/iscsi_ibft.h b/include/linux/iscsi_ibft.h index 790e7fcfc1a6..e2742748104d 100644 --- a/include/linux/iscsi_ibft.h +++ b/include/linux/iscsi_ibft.h @@ -21,12 +21,20 @@ */ extern phys_addr_t ibft_phys_addr; +#ifdef CONFIG_ISCSI_IBFT_FIND + /* * Routine used to find and reserve the iSCSI Boot Format Table. The * physical address is set in the ibft_phys_addr variable. */ -#ifdef CONFIG_ISCSI_IBFT_FIND void reserve_ibft_region(void); + +/* + * Physical bounds to search for the iSCSI Boot Format Table. + */ +#define IBFT_START 0x80000 /* 512kB */ +#define IBFT_END 0x100000 /* 1MB */ + #else static inline void reserve_ibft_region(void) {} #endif |