From 4971531af319f8bdd9a81a87eecfb6b19f2f8c8e Mon Sep 17 00:00:00 2001
From: Matt Fleming <matt@codeblueprint.co.uk>
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 <dyoung@redhat.com> [kexec/kdump]
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> [arm]
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Taku Izumi <izumi.taku@jp.fujitsu.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
---
arch/x86/kernel/setup.c | 17 ++++++++---------
drivers/firmware/efi/fake_mem.c | 2 +-
2 files changed, 9 insertions(+), 10 deletions(-)
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 0fa60f5f5a164..4fd69e532c15d 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)) {
+ reserve_bios_regions();
+
+ if (efi_enabled(EFI_MEMMAP)) {
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))
+ /*
+ * 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 48430aba13c18..c437388a7b852 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 */
--
2.30.2