Hi, References: <20131125085630.417850406@xxxxxxxxxxxxxxxxxxxxxxxxxx> Content-Disposition: inline; filename=02-efi-map-fixed-addr.patch Kexec kernel will use saved runtime virtual mapping, so add a new function efi_map_region_fixed for directly mapping a md to md->virt. The md is passed in from 1st kernel, the virtual addr is saved in md->virt_addr. Matt: coding style reuse __map_region Boris: Strenthen comment lines to 80 cols. Signed-off-by: Dave Young <dyoung@xxxxxxxxxx> Acked-by: Borislav Petkov <bp@xxxxxxx> --- arch/x86/include/asm/efi.h | 1 + arch/x86/platform/efi/efi_32.c | 2 ++ arch/x86/platform/efi/efi_64.c | 10 ++++++++++ 3 files changed, 13 insertions(+) --- efi.orig/arch/x86/include/asm/efi.h +++ efi/arch/x86/include/asm/efi.h @@ -128,6 +128,7 @@ extern void efi_call_phys_epilog(void); extern void efi_unmap_memmap(void); extern void efi_memory_uc(u64 addr, unsigned long size); extern void __init efi_map_region(efi_memory_desc_t *md); +extern void __init efi_map_region_fixed(efi_memory_desc_t *md); extern void efi_sync_low_kernel_mappings(void); extern void efi_setup_page_tables(void); extern void __init old_map_region(efi_memory_desc_t *md); --- efi.orig/arch/x86/platform/efi/efi_64.c +++ efi/arch/x86/platform/efi/efi_64.c @@ -199,6 +199,16 @@ void __init efi_map_region(efi_memory_de md->virt_addr = efi_va; } +/* + * kexec kernel will use efi_map_region_fixed to map efi runtime memory ranges. + * md->virt_addr is the original virtual address which had been mapped in kexec + * 1st kernel. + */ +void __init efi_map_region_fixed(efi_memory_desc_t *md) +{ + __map_region(md, md->virt_addr); +} + void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size, u32 type, u64 attribute) { --- efi.orig/arch/x86/platform/efi/efi_32.c +++ efi/arch/x86/platform/efi/efi_32.c @@ -47,6 +47,8 @@ void __init efi_map_region(efi_memory_de old_map_region(md); } +void __init efi_map_region_fixed(efi_memory_desc_t *md) {} + void efi_call_phys_prelog(void) { struct desc_ptr gdt_descr; -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html