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| author | Matt Fleming <matt@codeblueprint.co.uk> | 2016-03-02 00:02:56 +0100 |
|---|---|---|
| committer | Matt Fleming <matt@codeblueprint.co.uk> | 2016-09-09 17:08:36 +0200 |
| commit | 31ce8cc68180803aa481c0c1daac29d8eaceca9d (patch) | |
| tree | 8c5310d53093e288169a193b1776ce33b4237589 /arch/x86/platform | |
| parent | efi: Allow drivers to reserve boot services forever (diff) | |
| download | linux-31ce8cc68180803aa481c0c1daac29d8eaceca9d.tar.xz linux-31ce8cc68180803aa481c0c1daac29d8eaceca9d.zip | |
efi/runtime-map: Use efi.memmap directly instead of a copy
Now that efi.memmap is available all of the time there's no need to
allocate and build a separate copy of the EFI memory map.
Furthermore, efi.memmap contains boot services regions but only those
regions that have been reserved via efi_mem_reserve(). Using
efi.memmap allows us to pass boot services across kexec reboot so that
the ESRT and BGRT drivers will now work.
Tested-by: Dave Young <dyoung@redhat.com> [kexec/kdump]
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> [arm]
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Peter Jones <pjones@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Diffstat (limited to 'arch/x86/platform')
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 40 |
1 files changed, 0 insertions, 40 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index 33996987ac70..342cebd1e17c 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -592,42 +592,6 @@ static void __init get_systab_virt_addr(efi_memory_desc_t *md) } } -static void __init save_runtime_map(void) -{ -#ifdef CONFIG_KEXEC_CORE - unsigned long desc_size; - efi_memory_desc_t *md; - void *tmp, *q = NULL; - int count = 0; - - if (efi_enabled(EFI_OLD_MEMMAP)) - return; - - desc_size = efi.memmap.desc_size; - - for_each_efi_memory_desc(md) { - if (!(md->attribute & EFI_MEMORY_RUNTIME) || - (md->type == EFI_BOOT_SERVICES_CODE) || - (md->type == EFI_BOOT_SERVICES_DATA)) - continue; - tmp = krealloc(q, (count + 1) * desc_size, GFP_KERNEL); - if (!tmp) - goto out; - q = tmp; - - memcpy(q + count * desc_size, md, desc_size); - count++; - } - - efi_runtime_map_setup(q, count, desc_size); - return; - -out: - kfree(q); - pr_err("Error saving runtime map, efi runtime on kexec non-functional!!\n"); -#endif -} - static void *realloc_pages(void *old_memmap, int old_shift) { void *ret; @@ -840,8 +804,6 @@ static void __init kexec_enter_virtual_mode(void) return; } - save_runtime_map(); - BUG_ON(!efi.systab); num_pages = ALIGN(efi.memmap.nr_map * efi.memmap.desc_size, PAGE_SIZE); @@ -934,8 +896,6 @@ static void __init __efi_enter_virtual_mode(void) return; } - save_runtime_map(); - BUG_ON(!efi.systab); if (efi_setup_page_tables(pa, 1 << pg_shift)) { |