From 4971531af319f8bdd9a81a87eecfb6b19f2f8c8e Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Tue, 21 Jun 2016 23:11:38 +0100 Subject: [PATCH] x86/efi: Test for EFI_MEMMAP functionality when iterating EFI memmap Both efi_find_mirror() and efi_fake_memmap() really want to know whether the EFI memory map is available, not just whether the machine was booted using EFI. efi_fake_memmap() even has a check for EFI_MEMMAP at the start of the function. Since we've already got other code that has this dependency, merge everything under one if() conditional, and remove the now superfluous check from efi_fake_memmap(). Tested-by: Dave Young [kexec/kdump] Tested-by: Ard Biesheuvel [arm] Acked-by: Ard Biesheuvel Cc: Taku Izumi Cc: Tony Luck Cc: Xishi Qiu Cc: Kamezawa Hiroyuki Signed-off-by: Matt Fleming --- arch/x86/kernel/setup.c | 19 +++++++++---------- drivers/firmware/efi/fake_mem.c | 2 +- 2 files changed, 10 insertions(+), 11 deletions(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 0fa60f5f5a16..4fd69e532c15 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1096,19 +1096,18 @@ void __init setup_arch(char **cmdline_p) memblock_set_current_limit(ISA_END_ADDRESS); memblock_x86_fill(); - if (efi_enabled(EFI_BOOT)) { - efi_fake_memmap(); - efi_find_mirror(); - } - reserve_bios_regions(); - /* - * The EFI specification says that boot service code won't be called - * after ExitBootServices(). This is, in fact, a lie. - */ - if (efi_enabled(EFI_MEMMAP)) + if (efi_enabled(EFI_MEMMAP)) { + efi_fake_memmap(); + efi_find_mirror(); + + /* + * The EFI specification says that boot service code won't be + * called after ExitBootServices(). This is, in fact, a lie. + */ efi_reserve_boot_services(); + } /* preallocate 4k for mptable mpc */ early_reserve_e820_mpc_new(); diff --git a/drivers/firmware/efi/fake_mem.c b/drivers/firmware/efi/fake_mem.c index 48430aba13c1..c437388a7b85 100644 --- a/drivers/firmware/efi/fake_mem.c +++ b/drivers/firmware/efi/fake_mem.c @@ -64,7 +64,7 @@ void __init efi_fake_memmap(void) void *old, *new; int i; - if (!nr_fake_mem || !efi_enabled(EFI_MEMMAP)) + if (!nr_fake_mem) return; /* count up the number of EFI memory descriptor */