x86, realmode: fix 64-bit wakeup sequence
There were number of issues in wakeup sequence: - Wakeup stack was placed in hardcoded address. - NX bit in EFER was not enabled. - Initialization incorrectly set physical address of secondary_startup_64. - Some alignment issues. This patch fixes these issues and in addition: - Unifies coding conventions in .S files. - Sets alignments of code and data right. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-18-git-send-email-jarkko.sakkinen@intel.com Originally-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Len Brown <len.brown@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
parent
6feb592dce
commit
8e029fcdd8
|
@ -64,7 +64,7 @@ void __init setup_real_mode(void)
|
|||
*((u32 *)__va(real_mode_header.boot_gdt)) = __pa(boot_gdt);
|
||||
#else
|
||||
*((u64 *) __va(real_mode_header.startup_64_smp)) =
|
||||
(u64) __pa(secondary_startup_64);
|
||||
(u64)secondary_startup_64;
|
||||
|
||||
*((u64 *) __va(real_mode_header.level3_ident_pgt)) =
|
||||
__pa(level3_ident_pgt) + _KERNPG_TABLE;
|
||||
|
|
|
@ -13,6 +13,7 @@ always := realmode.bin
|
|||
|
||||
realmode-y += header.o
|
||||
realmode-y += trampoline_$(BITS).o
|
||||
realmode-y += stack.o
|
||||
realmode-$(CONFIG_X86_32) += reboot_32.o
|
||||
realmode-$(CONFIG_ACPI_SLEEP) += wakeup/wakeup.o
|
||||
|
||||
|
|
|
@ -9,7 +9,7 @@
|
|||
|
||||
.section ".header", "a"
|
||||
|
||||
ENTRY(real_mode_header)
|
||||
GLOBAL(real_mode_header)
|
||||
.long pa_text_start
|
||||
.long pa_ro_end
|
||||
.long pa_end
|
||||
|
|
|
@ -16,10 +16,9 @@
|
|||
*/
|
||||
.section ".text32", "ax"
|
||||
.code32
|
||||
.globl machine_real_restart_asm
|
||||
|
||||
.balign 16
|
||||
machine_real_restart_asm:
|
||||
.balign 16
|
||||
ENTRY(machine_real_restart_asm)
|
||||
/* Set up the IDT for real mode. */
|
||||
lidtl pa_machine_real_restart_idt
|
||||
|
||||
|
@ -67,7 +66,7 @@ machine_real_restart_asm:
|
|||
.text
|
||||
.code16
|
||||
|
||||
.balign 16
|
||||
.balign 16
|
||||
machine_real_restart_asm16:
|
||||
1:
|
||||
xorl %ecx, %ecx
|
||||
|
@ -102,15 +101,15 @@ bios:
|
|||
ljmpw $0xf000, $0xfff0
|
||||
|
||||
.section ".rodata", "a"
|
||||
.globl machine_real_restart_idt, machine_real_restart_gdt
|
||||
|
||||
.balign 16
|
||||
machine_real_restart_idt:
|
||||
.balign 16
|
||||
GLOBAL(machine_real_restart_idt)
|
||||
.word 0xffff /* Length - real mode default value */
|
||||
.long 0 /* Base - real mode default value */
|
||||
END(machine_real_restart_idt)
|
||||
|
||||
.balign 16
|
||||
machine_real_restart_gdt:
|
||||
.balign 16
|
||||
GLOBAL(machine_real_restart_gdt)
|
||||
/* Self-pointer */
|
||||
.word 0xffff /* Length - real mode default value */
|
||||
.long pa_machine_real_restart_gdt
|
||||
|
@ -130,3 +129,4 @@ machine_real_restart_gdt:
|
|||
* semantics we don't have to reload the segments once CR0.PE = 0.
|
||||
*/
|
||||
.quad GDT_ENTRY(0x0093, 0x100, 0xffff)
|
||||
END(machine_real_restart_gdt)
|
||||
|
|
|
@ -0,0 +1,19 @@
|
|||
/*
|
||||
* Common heap and stack allocations
|
||||
*/
|
||||
|
||||
#include <linux/linkage.h>
|
||||
|
||||
.data
|
||||
GLOBAL(HEAP)
|
||||
.long rm_heap
|
||||
GLOBAL(heap_end)
|
||||
.long rm_stack
|
||||
|
||||
.bss
|
||||
.balign 16
|
||||
GLOBAL(rm_heap)
|
||||
.space 2048
|
||||
GLOBAL(rm_stack)
|
||||
.space 2048
|
||||
GLOBAL(rm_stack_end)
|
|
@ -33,10 +33,9 @@
|
|||
|
||||
.text
|
||||
.code16
|
||||
.globl trampoline_data
|
||||
|
||||
.balign PAGE_SIZE
|
||||
trampoline_data:
|
||||
.balign PAGE_SIZE
|
||||
ENTRY(trampoline_data)
|
||||
wbinvd # Needed for NUMA-Q should be harmless for others
|
||||
|
||||
LJMPW_RM(1f)
|
||||
|
@ -70,20 +69,22 @@ trampoline_data:
|
|||
ENTRY(startup_32) # note: also used from wakeup_asm.S
|
||||
jmp *%eax
|
||||
|
||||
.data
|
||||
.globl startup_32_smp, boot_gdt, trampoline_status
|
||||
.balign 4
|
||||
boot_gdt_descr:
|
||||
.word __BOOT_DS + 7 # gdt limit
|
||||
boot_gdt:
|
||||
.long 0 # gdt base
|
||||
.section ".rodata","a"
|
||||
|
||||
.balign 4
|
||||
boot_idt_descr:
|
||||
.word 0 # idt limit = 0
|
||||
.long 0 # idt base = 0L
|
||||
|
||||
trampoline_status:
|
||||
.long 0
|
||||
.data
|
||||
|
||||
startup_32_smp:
|
||||
.long 0
|
||||
boot_gdt_descr:
|
||||
.word __BOOT_DS + 7 # gdt limit
|
||||
GLOBAL(boot_gdt)
|
||||
.long 0 # gdt base
|
||||
|
||||
.bss
|
||||
|
||||
.balign 4
|
||||
GLOBAL(trampoline_status) .space 4
|
||||
GLOBAL(startup_32_smp) .space 4
|
||||
|
|
|
@ -52,7 +52,7 @@ ENTRY(trampoline_data)
|
|||
# write marker for master knows we're running
|
||||
|
||||
# Setup stack
|
||||
movw $trampoline_stack_end, %sp
|
||||
movl $rm_stack_end, %esp
|
||||
|
||||
call verify_cpu # Verify the cpu supports long mode
|
||||
testl %eax, %eax # Check for return code
|
||||
|
@ -68,8 +68,11 @@ ENTRY(trampoline_data)
|
|||
lidtl tidt # load idt with 0, 0
|
||||
lgdtl tgdt # load gdt with whatever is appropriate
|
||||
|
||||
mov $X86_CR0_PE, %ax # protected mode (PE) bit
|
||||
lmsw %ax # into protected mode
|
||||
movw $__KERNEL_DS, %dx # Data segment descriptor
|
||||
|
||||
# Enable protected mode
|
||||
movl $X86_CR0_PE, %eax # protected mode (PE) bit
|
||||
movl %eax, %cr0 # into protected mode
|
||||
|
||||
# flush prefetch and jump to startup_32
|
||||
ljmpl $__KERNEL32_CS, $pa_startup_32
|
||||
|
@ -83,27 +86,27 @@ no_longmode:
|
|||
.code32
|
||||
.balign 4
|
||||
ENTRY(startup_32)
|
||||
movl $__KERNEL_DS, %eax # Initialize the %ds segment register
|
||||
movl %eax, %ds
|
||||
movl %edx, %ss
|
||||
addl $pa_real_mode_base, %esp
|
||||
movl %edx, %ds
|
||||
movl %edx, %es
|
||||
movl %edx, %fs
|
||||
movl %edx, %gs
|
||||
|
||||
movl $X86_CR4_PAE, %eax
|
||||
movl %eax, %cr4 # Enable PAE mode
|
||||
|
||||
movl pa_startup_64_smp, %esi
|
||||
movl pa_startup_64_smp_high, %edi
|
||||
|
||||
# Setup trampoline 4 level pagetables
|
||||
leal pa_trampoline_level4_pgt, %eax
|
||||
# Setup trampoline 4 level pagetables
|
||||
movl $pa_level3_ident_pgt, %eax
|
||||
movl %eax, %cr3
|
||||
|
||||
movl $MSR_EFER, %ecx
|
||||
movl $(1 << _EFER_LME), %eax # Enable Long Mode
|
||||
movl $((1 << _EFER_LME) | (1 << _EFER_NX)), %eax # Enable Long Mode
|
||||
xorl %edx, %edx
|
||||
wrmsr
|
||||
|
||||
# Enable paging and in turn activate Long Mode
|
||||
# Enable protected mode
|
||||
movl $(X86_CR0_PG | X86_CR0_PE), %eax
|
||||
movl $(X86_CR0_PG | X86_CR0_WP | X86_CR0_PE), %eax
|
||||
movl %eax, %cr0
|
||||
|
||||
/*
|
||||
|
@ -119,10 +122,7 @@ ENTRY(startup_32)
|
|||
.balign 4
|
||||
ENTRY(startup_64)
|
||||
# Now jump into the kernel using virtual addresses
|
||||
movl %edi, %eax
|
||||
shlq $32, %rax
|
||||
addl %esi, %eax
|
||||
jmp *%rax
|
||||
jmpq *startup_64_smp(%rip)
|
||||
|
||||
.section ".rodata","a"
|
||||
.balign 16
|
||||
|
@ -132,10 +132,10 @@ tidt:
|
|||
|
||||
# Duplicate the global descriptor table
|
||||
# so the kernel can live anywhere
|
||||
.balign 4
|
||||
.balign 16
|
||||
.globl tgdt
|
||||
tgdt:
|
||||
.short tgdt_end - tgdt # gdt limit
|
||||
.short tgdt_end - tgdt - 1 # gdt limit
|
||||
.long pa_tgdt
|
||||
.short 0
|
||||
.quad 0x00cf9b000000ffff # __KERNEL32_CS
|
||||
|
@ -143,23 +143,12 @@ tgdt:
|
|||
.quad 0x00cf93000000ffff # __KERNEL_DS
|
||||
tgdt_end:
|
||||
|
||||
.data
|
||||
.balign 4
|
||||
GLOBAL(trampoline_status)
|
||||
.long 0
|
||||
.bss
|
||||
|
||||
trampoline_stack:
|
||||
.org 0x1000
|
||||
trampoline_stack_end:
|
||||
.balign PAGE_SIZE
|
||||
GLOBAL(level3_ident_pgt) .space 511*8
|
||||
GLOBAL(level3_kernel_pgt) .space 8
|
||||
|
||||
.globl level3_ident_pgt
|
||||
.globl level3_kernel_pgt
|
||||
GLOBAL(trampoline_level4_pgt)
|
||||
level3_ident_pgt: .quad 0
|
||||
.fill 510,8,0
|
||||
level3_kernel_pgt: .quad 0
|
||||
|
||||
.globl startup_64_smp
|
||||
.globl startup_64_smp_high
|
||||
startup_64_smp: .long 0
|
||||
startup_64_smp_high: .long 0
|
||||
.balign 8
|
||||
GLOBAL(startup_64_smp) .space 8
|
||||
GLOBAL(trampoline_status) .space 4
|
||||
|
|
|
@ -1,6 +1,7 @@
|
|||
/*
|
||||
* ACPI wakeup real mode startup stub
|
||||
*/
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/segment.h>
|
||||
#include <asm/msr-index.h>
|
||||
#include <asm/page_types.h>
|
||||
|
@ -9,31 +10,33 @@
|
|||
#include "../realmode.h"
|
||||
#include "wakeup.h"
|
||||
|
||||
.code16
|
||||
.code16
|
||||
|
||||
/* This should match the structure in wakeup.h */
|
||||
.section ".data", "aw"
|
||||
.globl wakeup_header
|
||||
wakeup_header:
|
||||
video_mode: .short 0 /* Video mode number */
|
||||
pmode_entry: .long 0
|
||||
pmode_cs: .short __KERNEL_CS
|
||||
pmode_cr0: .long 0 /* Saved %cr0 */
|
||||
pmode_cr3: .long 0 /* Saved %cr3 */
|
||||
pmode_cr4: .long 0 /* Saved %cr4 */
|
||||
pmode_efer: .quad 0 /* Saved EFER */
|
||||
pmode_gdt: .quad 0
|
||||
pmode_misc_en: .quad 0 /* Saved MISC_ENABLE MSR */
|
||||
pmode_behavior: .long 0 /* Wakeup behavior flags */
|
||||
realmode_flags: .long 0
|
||||
real_magic: .long 0
|
||||
signature: .long WAKEUP_HEADER_SIGNATURE
|
||||
.size wakeup_header, .-wakeup_header
|
||||
.section ".data", "aw"
|
||||
|
||||
.balign 16
|
||||
GLOBAL(wakeup_header)
|
||||
video_mode: .short 0 /* Video mode number */
|
||||
pmode_entry: .long 0
|
||||
pmode_cs: .short __KERNEL_CS
|
||||
pmode_cr0: .long 0 /* Saved %cr0 */
|
||||
pmode_cr3: .long 0 /* Saved %cr3 */
|
||||
pmode_cr4: .long 0 /* Saved %cr4 */
|
||||
pmode_efer: .quad 0 /* Saved EFER */
|
||||
pmode_gdt: .quad 0
|
||||
pmode_misc_en: .quad 0 /* Saved MISC_ENABLE MSR */
|
||||
pmode_behavior: .long 0 /* Wakeup behavior flags */
|
||||
realmode_flags: .long 0
|
||||
real_magic: .long 0
|
||||
signature: .long WAKEUP_HEADER_SIGNATURE
|
||||
END(wakeup_header)
|
||||
|
||||
.text
|
||||
.code16
|
||||
.globl wakeup_start
|
||||
wakeup_start:
|
||||
|
||||
.balign 16
|
||||
ENTRY(wakeup_start)
|
||||
cli
|
||||
cld
|
||||
|
||||
|
@ -62,12 +65,14 @@ wakeup_start:
|
|||
3:
|
||||
/* Set up segments */
|
||||
movw %cs, %ax
|
||||
movw %ax, %ss
|
||||
movl $rm_stack_end, %esp
|
||||
movw %ax, %ds
|
||||
movw %ax, %es
|
||||
movw %ax, %ss
|
||||
lidtl wakeup_idt
|
||||
movw %ax, %fs
|
||||
movw %ax, %gs
|
||||
|
||||
movl $wakeup_stack_end, %esp
|
||||
lidtl wakeup_idt
|
||||
|
||||
/* Clear the EFLAGS */
|
||||
pushl $0
|
||||
|
@ -145,9 +150,8 @@ bogus_real_magic:
|
|||
* be the case for other laptops or integrated video devices.
|
||||
*/
|
||||
|
||||
.globl wakeup_gdt
|
||||
.balign 16
|
||||
wakeup_gdt:
|
||||
GLOBAL(wakeup_gdt)
|
||||
.word 3*8-1 /* Self-descriptor */
|
||||
.long pa_wakeup_gdt
|
||||
.word 0
|
||||
|
@ -159,29 +163,18 @@ wakeup_gdt:
|
|||
.word 0xffff /* 16-bit data segment @ real_mode_base */
|
||||
.long 0x93000000 + pa_real_mode_base
|
||||
.word 0x008f /* big real mode */
|
||||
.size wakeup_gdt, .-wakeup_gdt
|
||||
END(wakeup_gdt)
|
||||
|
||||
.data
|
||||
.section ".rodata","a"
|
||||
.balign 8
|
||||
|
||||
/* This is the standard real-mode IDT */
|
||||
wakeup_idt:
|
||||
.balign 16
|
||||
GLOBAL(wakeup_idt)
|
||||
.word 0xffff /* limit */
|
||||
.long 0 /* address */
|
||||
.word 0
|
||||
|
||||
.globl HEAP, heap_end
|
||||
HEAP:
|
||||
.long wakeup_heap
|
||||
heap_end:
|
||||
.long wakeup_stack
|
||||
|
||||
.bss
|
||||
wakeup_heap:
|
||||
.space 2048
|
||||
wakeup_stack:
|
||||
.space 2048
|
||||
wakeup_stack_end:
|
||||
END(wakeup_idt)
|
||||
|
||||
.section ".signature","a"
|
||||
end_signature:
|
||||
|
|
|
@ -9,10 +9,10 @@
|
|||
|
||||
.balign PAGE_SIZE
|
||||
|
||||
ENTRY(real_mode_blob)
|
||||
GLOBAL(real_mode_blob)
|
||||
.incbin "arch/x86/realmode/rm/realmode.bin"
|
||||
END(real_mode_blob)
|
||||
|
||||
ENTRY(real_mode_relocs)
|
||||
GLOBAL(real_mode_relocs)
|
||||
.incbin "arch/x86/realmode/rm/realmode.relocs"
|
||||
END(real_mode_relocs)
|
||||
|
|
Loading…
Reference in New Issue