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authorHuang, Ying <ying.huang@intel.com>2008-01-30 13:32:11 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:32:11 +0100
commit8b2cb7a8f531d6ca72a8aff873b9bb1c6b3122ba (patch)
treef53edab6bdc4e1f39ef2cea8d13f15242617262e
parentbfd074e05bdb69652d24ebc60b126899174ca788 (diff)
x86: 32-bit EFI runtime service support: fixes in sync with 64-bit support
support according to fixes of x86_64 support. - Delete efi_rt_lock because it is used during system early boot, before SMP is initialized. - Change local_flush_tlb() to __flush_tlb_all() to flush global page mapping. - Clean up includes. - Revise Kconfig description. - Enable noefi kernel parameter on i386. Signed-off-by: Huang Ying <ying.huang@intel.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--Documentation/kernel-parameters.txt2
-rw-r--r--Documentation/x86_64/boot-options.txt4
-rw-r--r--arch/x86/Kconfig19
-rw-r--r--arch/x86/kernel/efi.c7
-rw-r--r--arch/x86/kernel/efi_32.c25
-rw-r--r--arch/x86/kernel/efi_64.c7
-rw-r--r--arch/x86/kernel/setup_32.c6
7 files changed, 25 insertions, 45 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b3f20beea411..e7910f8b4fcc 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1169,6 +1169,8 @@ and is between 256 and 4096 characters. It is defined in the file
nodisconnect [HW,SCSI,M68K] Disables SCSI disconnects.
+ noefi [X86-32,X86-64] Disable EFI runtime services support.
+
noexec [IA-64]
noexec [X86-32,X86-64]
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index 638bf46ca059..34abae4e9442 100644
--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86_64/boot-options.txt
@@ -306,8 +306,4 @@ Debugging
newfallback: use new unwinder but fall back to old if it gets
stuck (default)
-EFI
-
- noefi Disable EFI support
-
Miscellaneous
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d89b94528153..fa6fa52248d9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -961,21 +961,18 @@ config MTRR
config EFI
def_bool n
- prompt "Boot from EFI support"
+ prompt "EFI runtime service support"
depends on ACPI
---help---
- This enables the kernel to boot on EFI platforms using
- system configuration information passed to it from the firmware.
- This also enables the kernel to use any EFI runtime services that are
+ This enables the kernel to use EFI runtime services that are
available (such as the EFI variable services).
- This option is only useful on systems that have EFI firmware
- and will result in a kernel image that is ~8k larger. In addition,
- you must use the latest ELILO loader available at
- <http://elilo.sourceforge.net> in order to take advantage of
- kernel initialization using EFI information (neither GRUB nor LILO know
- anything about EFI). However, even with this option, the resultant
- kernel should continue to boot on existing non-EFI platforms.
+ This option is only useful on systems that have EFI firmware.
+ In addition, you should use the latest ELILO loader available
+ at <http://elilo.sourceforge.net> in order to take advantage
+ of EFI runtime services. However, even with this option, the
+ resultant kernel should continue to boot on existing non-EFI
+ platforms.
config IRQBALANCE
def_bool y
diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c
index 0a61522e85c7..2939b015c2ed 100644
--- a/arch/x86/kernel/efi.c
+++ b/arch/x86/kernel/efi.c
@@ -55,6 +55,13 @@ struct efi_memory_map memmap;
struct efi efi_phys __initdata;
static efi_system_table_t efi_systab __initdata;
+static int __init setup_noefi(char *arg)
+{
+ efi_enabled = 0;
+ return 0;
+}
+early_param("noefi", setup_noefi);
+
static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
{
return efi_call_virt2(get_time, tm, tc);
diff --git a/arch/x86/kernel/efi_32.c b/arch/x86/kernel/efi_32.c
index 30f937116288..afd2c3b039d6 100644
--- a/arch/x86/kernel/efi_32.c
+++ b/arch/x86/kernel/efi_32.c
@@ -20,27 +20,15 @@
*/
#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/mm.h>
#include <linux/types.h>
-#include <linux/time.h>
-#include <linux/spinlock.h>
-#include <linux/bootmem.h>
#include <linux/ioport.h>
-#include <linux/module.h>
#include <linux/efi.h>
-#include <linux/kexec.h>
-#include <asm/setup.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/pgtable.h>
-#include <asm/processor.h>
-#include <asm/desc.h>
#include <asm/tlbflush.h>
-#define PFX "EFI: "
-
/*
* To make EFI call EFI runtime service in physical addressing mode we need
* prelog/epilog before/after the invocation to disable interrupt, to
@@ -49,16 +37,14 @@
*/
static unsigned long efi_rt_eflags;
-static DEFINE_SPINLOCK(efi_rt_lock);
static pgd_t efi_bak_pg_dir_pointer[2];
-void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
+void efi_call_phys_prelog(void)
{
unsigned long cr4;
unsigned long temp;
struct desc_ptr gdt_descr;
- spin_lock(&efi_rt_lock);
local_irq_save(efi_rt_eflags);
/*
@@ -88,14 +74,14 @@ void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
/*
* After the lock is released, the original page table is restored.
*/
- local_flush_tlb();
+ __flush_tlb_all();
gdt_descr.address = __pa(get_cpu_gdt_table(0));
gdt_descr.size = GDT_SIZE - 1;
load_gdt(&gdt_descr);
}
-void efi_call_phys_epilog(void) __releases(efi_rt_lock)
+void efi_call_phys_epilog(void)
{
unsigned long cr4;
struct desc_ptr gdt_descr;
@@ -119,10 +105,9 @@ void efi_call_phys_epilog(void) __releases(efi_rt_lock)
/*
* After the lock is released, the original page table is restored.
*/
- local_flush_tlb();
+ __flush_tlb_all();
local_irq_restore(efi_rt_eflags);
- spin_unlock(&efi_rt_lock);
}
/*
@@ -135,7 +120,7 @@ void __init efi_map_memmap(void)
memmap.map = bt_ioremap((unsigned long) memmap.phys_map,
(memmap.nr_map * memmap.desc_size));
if (memmap.map == NULL)
- printk(KERN_ERR PFX "Could not remap the EFI memmap!\n");
+ printk(KERN_ERR "Could not remap the EFI memmap!\n");
memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
}
diff --git a/arch/x86/kernel/efi_64.c b/arch/x86/kernel/efi_64.c
index f2000dbc7195..269de2e049a3 100644
--- a/arch/x86/kernel/efi_64.c
+++ b/arch/x86/kernel/efi_64.c
@@ -40,13 +40,6 @@
static pgd_t save_pgd __initdata;
static unsigned long efi_flags __initdata;
-static int __init setup_noefi(char *arg)
-{
- efi_enabled = 0;
- return 0;
-}
-early_param("noefi", setup_noefi);
-
static void __init early_mapping_set_exec(unsigned long start,
unsigned long end,
int executable)
diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index 2e805da337a2..704550fdb84c 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -648,9 +648,6 @@ void __init setup_arch(char **cmdline_p)
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
print_memory_map(memory_setup());
- if (efi_enabled)
- efi_init();
-
copy_edd();
if (!boot_params.hdr.root_flags)
@@ -677,6 +674,9 @@ void __init setup_arch(char **cmdline_p)
strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
*cmdline_p = command_line;
+ if (efi_enabled)
+ efi_init();
+
max_low_pfn = setup_memory();
#ifdef CONFIG_VMI