From a3828064be4ed8e95907d3943e7af13cb709694d Mon Sep 17 00:00:00 2001 From: "Huang, Ying" Date: Wed, 30 Jan 2008 13:34:10 +0100 Subject: [PATCH] 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 Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/efi.c | 2 ++ arch/x86/kernel/efi_32.c | 15 --------------- arch/x86/kernel/efi_64.c | 9 --------- arch/x86/kernel/setup_32.c | 2 -- arch/x86/kernel/setup_64.c | 4 +--- 5 files changed, 3 insertions(+), 29 deletions(-) diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c index 174b067b9d03..1411324a625c 100644 --- a/arch/x86/kernel/efi.c +++ b/arch/x86/kernel/efi.c @@ -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; } /* diff --git a/arch/x86/kernel/efi_32.c b/arch/x86/kernel/efi_32.c index 114b896d7573..cb91f985b4a1 100644 --- a/arch/x86/kernel/efi_32.c +++ b/arch/x86/kernel/efi_32.c @@ -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); -} diff --git a/arch/x86/kernel/efi_64.c b/arch/x86/kernel/efi_64.c index 9f8a75594398..4b73992c1e11 100644 --- a/arch/x86/kernel/efi_64.c +++ b/arch/x86/kernel/efi_64.c @@ -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, diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c index c038b09b1723..9c0ef4945a58 100644 --- a/arch/x86/kernel/setup_32.c +++ b/arch/x86/kernel/setup_32.c @@ -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 /* diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c index 4ccad185ab7e..697533e86822 100644 --- a/arch/x86/kernel/setup_64.c +++ b/arch/x86/kernel/setup_64.c @@ -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: -- 2.20.1