Commit a3828064 authored by Huang, Ying's avatar Huang, Ying Committed by Ingo Molnar

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: default avatarHuang Ying <ying.huang@intel.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent bed23c67
......@@ -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;
}
/*
......
......@@ -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);
}
......@@ -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,
......
......@@ -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
/*
......
......@@ -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:
......
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