Commit e1ad783b authored by Keith Packard's avatar Keith Packard Committed by Ingo Molnar
Browse files

Revert "x86, efi: Calling __pa() with an ioremap()ed address is invalid" 



This hangs my MacBook Air at boot time; I get no console
messages at all. I reverted this on top of -rc5 and my machine
boots again.

This reverts commit e8c71062.

Signed-off-by: default avatarMatt Fleming <matt.fleming@intel.com>
Signed-off-by: default avatarKeith Packard <keithp@keithp.com>
Acked-by: default avatarH. Peter Anvin <hpa@zytor.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Huang Ying <huang.ying.caritas@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/1321621751-3650-1-git-send-email-matt@console


Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 6d3e32e6

arch/x86/include/asm/e820.h

+0 −8
Original line number Diff line number Diff line
@@ -53,13 +53,6 @@ 
 */

#define E820_RESERVED_KERN        128



/*

 * Address ranges that need to be mapped by the kernel direct

 * mapping. This is used to make sure regions such as

 * EFI_RUNTIME_SERVICES_DATA are directly mapped. See setup_arch().

 */

#define E820_RESERVED_EFI         129



#ifndef __ASSEMBLY__

#include <linux/types.h>

struct e820entry {
@@ -122,7 +115,6 @@ static inline void early_memtest(unsigned long start, unsigned long end) 
}

#endif



extern unsigned long e820_end_pfn(unsigned long limit_pfn, unsigned type);

extern unsigned long e820_end_of_ram_pfn(void);

extern unsigned long e820_end_of_low_ram_pfn(void);

extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);

arch/x86/include/asm/efi.h

+5 −0
Original line number Diff line number Diff line
@@ -33,6 +33,8 @@ extern unsigned long asmlinkage efi_call_phys(void *, ...); 
#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6)	\

	efi_call_virt(f, a1, a2, a3, a4, a5, a6)



#define efi_ioremap(addr, size, type)		ioremap_cache(addr, size)



#else /* !CONFIG_X86_32 */



extern u64 efi_call0(void *fp);
@@ -82,6 +84,9 @@ extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3, 
	efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \

		  (u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))



extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,

				 u32 type);



#endif /* CONFIG_X86_32 */



extern int add_efi_memmap;

arch/x86/kernel/e820.c

+1 −2
Original line number Diff line number Diff line
@@ -135,7 +135,6 @@ static void __init e820_print_type(u32 type) 
		printk(KERN_CONT "(usable)");

		break;

	case E820_RESERVED:

	case E820_RESERVED_EFI:

		printk(KERN_CONT "(reserved)");

		break;

	case E820_ACPI:
@@ -784,7 +783,7 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align) 
/*

 * Find the highest page frame number we have available

 */

unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)

static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)

{

	int i;

	unsigned long last_pfn = 0;

arch/x86/kernel/setup.c

+1 −20
Original line number Diff line number Diff line
@@ -691,8 +691,6 @@ early_param("reservelow", parse_reservelow); 


void __init setup_arch(char **cmdline_p)

{

	unsigned long end_pfn;



#ifdef CONFIG_X86_32

	memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));

	visws_early_detect();
@@ -934,24 +932,7 @@ void __init setup_arch(char **cmdline_p) 
	init_gbpages();



	/* max_pfn_mapped is updated here */

	end_pfn = max_low_pfn;



#ifdef CONFIG_X86_64

	/*

	 * There may be regions after the last E820_RAM region that we

	 * want to include in the kernel direct mapping, such as

	 * EFI_RUNTIME_SERVICES_DATA.

	 */

	if (efi_enabled) {

		unsigned long efi_end;



		efi_end = e820_end_pfn(MAXMEM>>PAGE_SHIFT, E820_RESERVED_EFI);

		if (efi_end > max_low_pfn)

			end_pfn = efi_end;

	}

#endif



	max_low_pfn_mapped = init_memory_mapping(0, end_pfn << PAGE_SHIFT);

	max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);

	max_pfn_mapped = max_low_pfn_mapped;



#ifdef CONFIG_X86_64

arch/x86/platform/efi/efi.c

+11 −18
Original line number Diff line number Diff line
@@ -323,13 +323,10 @@ static void __init do_add_efi_memmap(void) 
		case EFI_UNUSABLE_MEMORY:

			e820_type = E820_UNUSABLE;

			break;

		case EFI_RUNTIME_SERVICES_DATA:

			e820_type = E820_RESERVED_EFI;

			break;

		default:

			/*

			 * EFI_RESERVED_TYPE EFI_RUNTIME_SERVICES_CODE

			 * EFI_MEMORY_MAPPED_IO

			 * EFI_RUNTIME_SERVICES_DATA EFI_MEMORY_MAPPED_IO

			 * EFI_MEMORY_MAPPED_IO_PORT_SPACE EFI_PAL_CODE

			 */

			e820_type = E820_RESERVED;
@@ -674,21 +671,10 @@ void __init efi_enter_virtual_mode(void) 
		end_pfn = PFN_UP(end);

		if (end_pfn <= max_low_pfn_mapped

		    || (end_pfn > (1UL << (32 - PAGE_SHIFT))

			&& end_pfn <= max_pfn_mapped)) {

			&& end_pfn <= max_pfn_mapped))

			va = __va(md->phys_addr);



			if (!(md->attribute & EFI_MEMORY_WB)) {

				addr = (u64) (unsigned long)va;

				npages = md->num_pages;

				memrange_efi_to_native(&addr, &npages);

				set_memory_uc(addr, npages);

			}

		} else {

			if (!(md->attribute & EFI_MEMORY_WB))

				va = ioremap_nocache(md->phys_addr, size);

		else

				va = ioremap_cache(md->phys_addr, size);

		}

			va = efi_ioremap(md->phys_addr, size, md->type);



		md->virt_addr = (u64) (unsigned long) va;
@@ -698,6 +684,13 @@ void __init efi_enter_virtual_mode(void) 
			continue;

		}



		if (!(md->attribute & EFI_MEMORY_WB)) {

			addr = md->virt_addr;

			npages = md->num_pages;

			memrange_efi_to_native(&addr, &npages);

			set_memory_uc(addr, npages);

		}



		systab = (u64) (unsigned long) efi_phys.systab;

		if (md->phys_addr <= systab && systab < end) {

			systab += md->virt_addr - md->phys_addr;

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