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x86: fixes some bugs about EFI memory map handling 

This patch fixes some bugs of EFI memory handing code.

- On x86_64, it is possible that EFI memory map can not be mapped via
  identity map, so efi_map_memmap is removed, just use early_ioremap.

- On i386, the EFI memory map mapping take effect cross paging_init,
  so it is not necessary to use efi_map_memmap.

- EFI memory map is unmapped in efi_enter_virtual_mode to avoid
  early_ioremap leak.

Signed-off-by: Huang Ying <ying.huang@intel.com>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Huang, Ying 2008-01-30 13:34:10 +01:00 committed by Ingo Molnar
parent bed23c67fe
commit a3828064be
5 changed files with 3 additions and 29 deletions
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2
arch/x86/kernel/efi.c
View File

@ -474,6 +474,8 @@ void __init efi_enter_virtual_mode(void)
efi.reset_system = virt_efi_reset_system;
efi.set_virtual_address_map = virt_efi_set_virtual_address_map;
runtime_code_page_mkexec();
early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
memmap.map = NULL;
}
/*

15
arch/x86/kernel/efi_32.c
View File

@ -109,18 +109,3 @@ void efi_call_phys_epilog(void)
local_irq_restore(efi_rt_eflags);
}
/*
* We need to map the EFI memory map again after paging_init().
*/
void __init efi_map_memmap(void)
{
memmap.map = NULL;
memmap.map = early_ioremap((unsigned long) memmap.phys_map,
(memmap.nr_map * memmap.desc_size));
if (memmap.map == NULL)
printk(KERN_ERR "Could not remap the EFI memmap!\n");
memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
}

9
arch/x86/kernel/efi_64.c
View File

@ -103,15 +103,6 @@ void __init efi_call_phys_epilog(void)
local_irq_restore(efi_flags);
}
/*
* We need to map the EFI memory map again after init_memory_mapping().
*/
void __init efi_map_memmap(void)
{
memmap.map = __va(memmap.phys_map);
memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
}
void __init efi_reserve_bootmem(void)
{
reserve_bootmem_generic((unsigned long)memmap.phys_map,

2
arch/x86/kernel/setup_32.c
View File

@ -808,8 +808,6 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_X86_GENERICARCH
generic_apic_probe();
#endif
if (efi_enabled)
efi_map_memmap();
#ifdef CONFIG_ACPI
/*

4
arch/x86/kernel/setup_64.c
View File

@ -378,10 +378,8 @@ void __init setup_arch(char **cmdline_p)
acpi_reserve_bootmem();
#endif
if (efi_enabled) {
efi_map_memmap();
if (efi_enabled)
efi_reserve_bootmem();
}
/*
* Find and reserve possible boot-time SMP configuration: