* [PATCH 1/2] merge 32 and 64 realmode wakeup code
@ 2011-03-13 22:03 matthieu castet
2011-03-13 22:31 ` Rafael J. Wysocki
0 siblings, 1 reply; 11+ messages in thread
From: matthieu castet @ 2011-03-13 22:03 UTC (permalink / raw)
To: Linux Kernel list, linux-acpi, x86; +Cc: Rafael J. Wysocki, H. Peter Anvin
- this mean less ifdef in code
- we could remove now unused field in wakeup_header (pmode_*)
Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
---
arch/x86/kernel/acpi/realmode/wakeup.S | 26 --------------------------
arch/x86/kernel/acpi/sleep.c | 25 +++++++++----------------
arch/x86/kernel/trampoline_32.S | 4 ----
3 files changed, 9 insertions(+), 46 deletions(-)
diff --git a/arch/x86/kernel/acpi/realmode/wakeup.S b/arch/x86/kernel/acpi/realmode/wakeup.S
index ead21b6..150a734 100644
--- a/arch/x86/kernel/acpi/realmode/wakeup.S
+++ b/arch/x86/kernel/acpi/realmode/wakeup.S
@@ -93,36 +93,10 @@ wakeup_code:
/* Do any other stuff... */
-#ifndef CONFIG_64BIT
- /* This could also be done in C code... */
- movl pmode_cr3, %eax
- movl %eax, %cr3
-
- movl pmode_cr4, %ecx
- jecxz 1f
- movl %ecx, %cr4
-1:
- movl pmode_efer, %eax
- movl pmode_efer + 4, %edx
- movl %eax, %ecx
- orl %edx, %ecx
- jz 1f
- movl $MSR_EFER, %ecx
- wrmsr
-1:
-
- lgdtl pmode_gdt
-
- /* This really couldn't... */
- movl pmode_cr0, %eax
- movl %eax, %cr0
- jmp pmode_return
-#else
pushw $0
pushw trampoline_segment
pushw $0
lret
-#endif
bogus_real_magic:
1:
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 4572c58..58a0b4b 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -20,7 +20,7 @@
unsigned long acpi_realmode_flags;
-#if defined(CONFIG_SMP) && defined(CONFIG_64BIT)
+#if defined(CONFIG_SMP)
static char temp_stack[4096];
#endif
@@ -67,33 +67,26 @@ int acpi_save_state_mem(void)
header->wakeup_gdt[2] =
GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff);
-#ifndef CONFIG_64BIT
- store_gdt((struct desc_ptr *)&header->pmode_gdt);
-
- if (rdmsr_safe(MSR_EFER, &header->pmode_efer_low,
- &header->pmode_efer_high))
- header->pmode_efer_low = header->pmode_efer_high = 0;
-#endif /* !CONFIG_64BIT */
-
header->pmode_cr0 = read_cr0();
header->pmode_cr4 = read_cr4_safe();
header->realmode_flags = acpi_realmode_flags;
header->real_magic = 0x12345678;
-
-#ifndef CONFIG_64BIT
- header->pmode_entry = (u32)&wakeup_pmode_return;
- header->pmode_cr3 = (u32)__pa(&initial_page_table);
- saved_magic = 0x12345678;
-#else /* CONFIG_64BIT */
header->trampoline_segment = trampoline_address() >> 4;
#ifdef CONFIG_SMP
stack_start = (unsigned long)temp_stack + sizeof(temp_stack);
early_gdt_descr.address =
(unsigned long)get_cpu_gdt_table(smp_processor_id());
+#ifdef CONFIG_64BIT
initial_gs = per_cpu_offset(smp_processor_id());
#endif
+#endif
+
+#ifndef CONFIG_64BIT
+ initial_code = (unsigned long)&wakeup_pmode_return;
+ saved_magic = 0x12345678;
+#else
initial_code = (unsigned long)wakeup_long64;
- saved_magic = 0x123456789abcdef0L;
+ saved_magic = 0x123456789abcdef0L;
#endif /* CONFIG_64BIT */
return 0;
diff --git a/arch/x86/kernel/trampoline_32.S b/arch/x86/kernel/trampoline_32.S
index 451c0a7..a726f60 100644
--- a/arch/x86/kernel/trampoline_32.S
+++ b/arch/x86/kernel/trampoline_32.S
@@ -32,8 +32,6 @@
#include <asm/segment.h>
#include <asm/page_types.h>
-#ifdef CONFIG_SMP
-
.section ".x86_trampoline","a"
.balign PAGE_SIZE
.code16
@@ -79,5 +77,3 @@ ENTRY(trampoline_status)
.globl trampoline_end
trampoline_end:
-
-#endif /* CONFIG_SMP */
--
1.7.4.1
^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] merge 32 and 64 realmode wakeup code
2011-03-13 22:03 [PATCH 1/2] merge 32 and 64 realmode wakeup code matthieu castet
@ 2011-03-13 22:31 ` Rafael J. Wysocki
2011-03-13 23:06 ` H. Peter Anvin
2011-03-15 19:31 ` Pavel Machek
0 siblings, 2 replies; 11+ messages in thread
From: Rafael J. Wysocki @ 2011-03-13 22:31 UTC (permalink / raw)
To: matthieu castet; +Cc: Linux Kernel list, linux-acpi, x86, H. Peter Anvin
On Sunday, March 13, 2011, matthieu castet wrote:
> - this mean less ifdef in code
> - we could remove now unused field in wakeup_header (pmode_*)
>
> Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
> ---
> arch/x86/kernel/acpi/realmode/wakeup.S | 26 --------------------------
> arch/x86/kernel/acpi/sleep.c | 25 +++++++++----------------
> arch/x86/kernel/trampoline_32.S | 4 ----
> 3 files changed, 9 insertions(+), 46 deletions(-)
>
> diff --git a/arch/x86/kernel/acpi/realmode/wakeup.S b/arch/x86/kernel/acpi/realmode/wakeup.S
> index ead21b6..150a734 100644
> --- a/arch/x86/kernel/acpi/realmode/wakeup.S
> +++ b/arch/x86/kernel/acpi/realmode/wakeup.S
> @@ -93,36 +93,10 @@ wakeup_code:
>
> /* Do any other stuff... */
>
> -#ifndef CONFIG_64BIT
> - /* This could also be done in C code... */
> - movl pmode_cr3, %eax
> - movl %eax, %cr3
> -
> - movl pmode_cr4, %ecx
> - jecxz 1f
> - movl %ecx, %cr4
> -1:
> - movl pmode_efer, %eax
> - movl pmode_efer + 4, %edx
> - movl %eax, %ecx
> - orl %edx, %ecx
> - jz 1f
> - movl $MSR_EFER, %ecx
> - wrmsr
> -1:
> -
> - lgdtl pmode_gdt
> -
> - /* This really couldn't... */
> - movl pmode_cr0, %eax
> - movl %eax, %cr0
> - jmp pmode_return
> -#else
> pushw $0
> pushw trampoline_segment
> pushw $0
> lret
> -#endif
>
> bogus_real_magic:
> 1:
> diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
> index 4572c58..58a0b4b 100644
> --- a/arch/x86/kernel/acpi/sleep.c
> +++ b/arch/x86/kernel/acpi/sleep.c
> @@ -20,7 +20,7 @@
>
> unsigned long acpi_realmode_flags;
>
> -#if defined(CONFIG_SMP) && defined(CONFIG_64BIT)
> +#if defined(CONFIG_SMP)
+#ifdef CONFIG_SMP
please.
> static char temp_stack[4096];
> #endif
>
> @@ -67,33 +67,26 @@ int acpi_save_state_mem(void)
> header->wakeup_gdt[2] =
> GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff);
>
> -#ifndef CONFIG_64BIT
> - store_gdt((struct desc_ptr *)&header->pmode_gdt);
> -
> - if (rdmsr_safe(MSR_EFER, &header->pmode_efer_low,
> - &header->pmode_efer_high))
> - header->pmode_efer_low = header->pmode_efer_high = 0;
> -#endif /* !CONFIG_64BIT */
> -
> header->pmode_cr0 = read_cr0();
> header->pmode_cr4 = read_cr4_safe();
> header->realmode_flags = acpi_realmode_flags;
> header->real_magic = 0x12345678;
> -
> -#ifndef CONFIG_64BIT
> - header->pmode_entry = (u32)&wakeup_pmode_return;
> - header->pmode_cr3 = (u32)__pa(&initial_page_table);
> - saved_magic = 0x12345678;
> -#else /* CONFIG_64BIT */
> header->trampoline_segment = trampoline_address() >> 4;
> #ifdef CONFIG_SMP
> stack_start = (unsigned long)temp_stack + sizeof(temp_stack);
> early_gdt_descr.address =
> (unsigned long)get_cpu_gdt_table(smp_processor_id());
> +#ifdef CONFIG_64BIT
> initial_gs = per_cpu_offset(smp_processor_id());
> #endif
> +#endif
> +
> +#ifndef CONFIG_64BIT
Please do
+ifdef CONFIG_64BIT
instead and reorder the following code accordingly (IMHO using #ifndef
with #else is confusing, unless the option is a "NO_SOMETHING" one).
> + initial_code = (unsigned long)&wakeup_pmode_return;
> + saved_magic = 0x12345678;
> +#else
> initial_code = (unsigned long)wakeup_long64;
> - saved_magic = 0x123456789abcdef0L;
> + saved_magic = 0x123456789abcdef0L;
> #endif /* CONFIG_64BIT */
>
> return 0;
> diff --git a/arch/x86/kernel/trampoline_32.S b/arch/x86/kernel/trampoline_32.S
> index 451c0a7..a726f60 100644
> --- a/arch/x86/kernel/trampoline_32.S
> +++ b/arch/x86/kernel/trampoline_32.S
> @@ -32,8 +32,6 @@
> #include <asm/segment.h>
> #include <asm/page_types.h>
>
> -#ifdef CONFIG_SMP
> -
> .section ".x86_trampoline","a"
> .balign PAGE_SIZE
> .code16
> @@ -79,5 +77,3 @@ ENTRY(trampoline_status)
>
> .globl trampoline_end
> trampoline_end:
> -
> -#endif /* CONFIG_SMP */
Apart from the remarks above it looks good.
Thanks,
Rafael
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] merge 32 and 64 realmode wakeup code
2011-03-13 22:31 ` Rafael J. Wysocki
@ 2011-03-13 23:06 ` H. Peter Anvin
2011-03-15 19:31 ` Pavel Machek
1 sibling, 0 replies; 11+ messages in thread
From: H. Peter Anvin @ 2011-03-13 23:06 UTC (permalink / raw)
To: Rafael J. Wysocki; +Cc: matthieu castet, Linux Kernel list, linux-acpi, x86
On 03/13/2011 03:31 PM, Rafael J. Wysocki wrote:
>
> Apart from the remarks above it looks good.
>
Indeed... if I get this quickly we can probably get it into .39.
-hpa
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] merge 32 and 64 realmode wakeup code
2011-03-13 22:31 ` Rafael J. Wysocki
2011-03-13 23:06 ` H. Peter Anvin
@ 2011-03-15 19:31 ` Pavel Machek
1 sibling, 0 replies; 11+ messages in thread
From: Pavel Machek @ 2011-03-15 19:31 UTC (permalink / raw)
To: Rafael J. Wysocki
Cc: matthieu castet, Linux Kernel list, linux-acpi, x86,
H. Peter Anvin
Hi!
> > -#ifdef CONFIG_SMP
> > -
> > .section ".x86_trampoline","a"
> > .balign PAGE_SIZE
> > .code16
> > @@ -79,5 +77,3 @@ ENTRY(trampoline_status)
> >
> > .globl trampoline_end
> > trampoline_end:
> > -
> > -#endif /* CONFIG_SMP */
>
> Apart from the remarks above it looks good.
Looks ok to me, too...
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH 1/2] merge 32 and 64 realmode wakeup code
@ 2011-07-02 17:43 Matthieu CASTET
2011-07-02 22:31 ` H. Peter Anvin
0 siblings, 1 reply; 11+ messages in thread
From: Matthieu CASTET @ 2011-07-02 17:43 UTC (permalink / raw)
To: Linux Kernel list, linux-acpi, x86
Cc: Rafael J. Wysocki, H. Peter Anvin, Matthieu CASTET
- this mean less ifdef in code
- we could remove now unused field in wakeup_header (pmode_*)
Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
---
arch/x86/kernel/acpi/realmode/wakeup.S | 26 --------------------------
arch/x86/kernel/acpi/sleep.c | 27 ++++++++++-----------------
arch/x86/kernel/trampoline_32.S | 4 ----
3 files changed, 10 insertions(+), 47 deletions(-)
diff --git a/arch/x86/kernel/acpi/realmode/wakeup.S b/arch/x86/kernel/acpi/realmode/wakeup.S
index ead21b6..150a734 100644
--- a/arch/x86/kernel/acpi/realmode/wakeup.S
+++ b/arch/x86/kernel/acpi/realmode/wakeup.S
@@ -93,36 +93,10 @@ wakeup_code:
/* Do any other stuff... */
-#ifndef CONFIG_64BIT
- /* This could also be done in C code... */
- movl pmode_cr3, %eax
- movl %eax, %cr3
-
- movl pmode_cr4, %ecx
- jecxz 1f
- movl %ecx, %cr4
-1:
- movl pmode_efer, %eax
- movl pmode_efer + 4, %edx
- movl %eax, %ecx
- orl %edx, %ecx
- jz 1f
- movl $MSR_EFER, %ecx
- wrmsr
-1:
-
- lgdtl pmode_gdt
-
- /* This really couldn't... */
- movl pmode_cr0, %eax
- movl %eax, %cr0
- jmp pmode_return
-#else
pushw $0
pushw trampoline_segment
pushw $0
lret
-#endif
bogus_real_magic:
1:
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 18a857b..96719ad 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -20,7 +20,7 @@
unsigned long acpi_realmode_flags;
-#if defined(CONFIG_SMP) && defined(CONFIG_64BIT)
+#ifdef CONFIG_SMP
static char temp_stack[4096];
#endif
@@ -67,34 +67,27 @@ int acpi_suspend_lowlevel(void)
header->wakeup_gdt[2] =
GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff);
-#ifndef CONFIG_64BIT
- store_gdt((struct desc_ptr *)&header->pmode_gdt);
-
- if (rdmsr_safe(MSR_EFER, &header->pmode_efer_low,
- &header->pmode_efer_high))
- header->pmode_efer_low = header->pmode_efer_high = 0;
-#endif /* !CONFIG_64BIT */
-
header->pmode_cr0 = read_cr0();
header->pmode_cr4 = read_cr4_safe();
header->realmode_flags = acpi_realmode_flags;
header->real_magic = 0x12345678;
-
-#ifndef CONFIG_64BIT
- header->pmode_entry = (u32)&wakeup_pmode_return;
- header->pmode_cr3 = (u32)__pa(&initial_page_table);
- saved_magic = 0x12345678;
-#else /* CONFIG_64BIT */
header->trampoline_segment = trampoline_address() >> 4;
#ifdef CONFIG_SMP
stack_start = (unsigned long)temp_stack + sizeof(temp_stack);
early_gdt_descr.address =
(unsigned long)get_cpu_gdt_table(smp_processor_id());
+#ifdef CONFIG_64BIT
initial_gs = per_cpu_offset(smp_processor_id());
#endif
+#endif
+
+#ifdef CONFIG_64BIT
initial_code = (unsigned long)wakeup_long64;
- saved_magic = 0x123456789abcdef0L;
-#endif /* CONFIG_64BIT */
+ saved_magic = 0x123456789abcdef0L;
+#else
+ initial_code = (unsigned long)&wakeup_pmode_return;
+ saved_magic = 0x12345678;
+#endif
do_suspend_lowlevel();
return 0;
diff --git a/arch/x86/kernel/trampoline_32.S b/arch/x86/kernel/trampoline_32.S
index 451c0a7..a726f60 100644
--- a/arch/x86/kernel/trampoline_32.S
+++ b/arch/x86/kernel/trampoline_32.S
@@ -32,8 +32,6 @@
#include <asm/segment.h>
#include <asm/page_types.h>
-#ifdef CONFIG_SMP
-
.section ".x86_trampoline","a"
.balign PAGE_SIZE
.code16
@@ -79,5 +77,3 @@ ENTRY(trampoline_status)
.globl trampoline_end
trampoline_end:
-
-#endif /* CONFIG_SMP */
--
1.7.5.4
^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] merge 32 and 64 realmode wakeup code
2011-07-02 17:43 Matthieu CASTET
@ 2011-07-02 22:31 ` H. Peter Anvin
2011-07-03 6:50 ` Rafael J. Wysocki
0 siblings, 1 reply; 11+ messages in thread
From: H. Peter Anvin @ 2011-07-02 22:31 UTC (permalink / raw)
To: Matthieu CASTET; +Cc: Linux Kernel list, linux-acpi, x86, Rafael J. Wysocki
On 07/02/2011 10:43 AM, Matthieu CASTET wrote:
> - this mean less ifdef in code
> - we could remove now unused field in wakeup_header (pmode_*)
>
> Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
> ---
> arch/x86/kernel/acpi/realmode/wakeup.S | 26 --------------------------
> arch/x86/kernel/acpi/sleep.c | 27 ++++++++++-----------------
> arch/x86/kernel/trampoline_32.S | 4 ----
> 3 files changed, 10 insertions(+), 47 deletions(-)
>
Looks great to me. Rafael?
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] merge 32 and 64 realmode wakeup code
2011-07-02 22:31 ` H. Peter Anvin
@ 2011-07-03 6:50 ` Rafael J. Wysocki
2011-07-03 20:52 ` matthieu castet
0 siblings, 1 reply; 11+ messages in thread
From: Rafael J. Wysocki @ 2011-07-03 6:50 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: Matthieu CASTET, Linux Kernel list, linux-acpi, x86
On Sunday, July 03, 2011, H. Peter Anvin wrote:
> On 07/02/2011 10:43 AM, Matthieu CASTET wrote:
> > - this mean less ifdef in code
> > - we could remove now unused field in wakeup_header (pmode_*)
> >
> > Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
> > ---
> > arch/x86/kernel/acpi/realmode/wakeup.S | 26 --------------------------
> > arch/x86/kernel/acpi/sleep.c | 27 ++++++++++-----------------
> > arch/x86/kernel/trampoline_32.S | 4 ----
> > 3 files changed, 10 insertions(+), 47 deletions(-)
> >
>
> Looks great to me. Rafael?
I don't have any immediate complaints. Please feel free to add my ACK
to the patches.
Thanks,
Rafael
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] merge 32 and 64 realmode wakeup code
2011-07-03 6:50 ` Rafael J. Wysocki
@ 2011-07-03 20:52 ` matthieu castet
2011-07-03 21:19 ` H. Peter Anvin
0 siblings, 1 reply; 11+ messages in thread
From: matthieu castet @ 2011-07-03 20:52 UTC (permalink / raw)
To: Rafael J. Wysocki; +Cc: H. Peter Anvin, Linux Kernel list, linux-acpi, x86
Hi,
Le Sun, 3 Jul 2011 08:50:32 +0200,
"Rafael J. Wysocki" <rjw@sisk.pl> a écrit :
> On Sunday, July 03, 2011, H. Peter Anvin wrote:
> > On 07/02/2011 10:43 AM, Matthieu CASTET wrote:
> > > - this mean less ifdef in code
> > > - we could remove now unused field in wakeup_header (pmode_*)
> > >
> > > Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
> > > ---
> > > arch/x86/kernel/acpi/realmode/wakeup.S | 26
> > > -------------------------- arch/x86/kernel/acpi/sleep.c
> > > | 27 ++++++++++-----------------
> > > arch/x86/kernel/trampoline_32.S | 4 ---- 3 files
> > > changed, 10 insertions(+), 47 deletions(-)
> > >
> >
> > Looks great to me. Rafael?
>
> I don't have any immediate complaints. Please feel free to add my ACK
> to the patches.
>
Thanks,
Should I repost the patches with our ack somewhere ?
Matthieu
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] merge 32 and 64 realmode wakeup code
2011-07-03 20:52 ` matthieu castet
@ 2011-07-03 21:19 ` H. Peter Anvin
0 siblings, 0 replies; 11+ messages in thread
From: H. Peter Anvin @ 2011-07-03 21:19 UTC (permalink / raw)
To: matthieu castet; +Cc: Rafael J. Wysocki, Linux Kernel list, linux-acpi, x86
On 07/03/2011 01:52 PM, matthieu castet wrote:
> Thanks,
>
> Should I repost the patches with our ack somewhere ?
No need.
-hpa
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH 1/2] merge 32 and 64 realmode wakeup code
@ 2011-12-16 20:13 Matthieu CASTET
2012-01-13 18:01 ` Pavel Machek
0 siblings, 1 reply; 11+ messages in thread
From: Matthieu CASTET @ 2011-12-16 20:13 UTC (permalink / raw)
To: linux-acpi, hpa, linux-kernel, rjw; +Cc: Matthieu CASTET
- this mean less ifdef in code
- we could remove now unused field in wakeup_header (pmode_*)
Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
---
arch/x86/kernel/acpi/realmode/wakeup.S | 26 --------------------------
arch/x86/kernel/acpi/sleep.c | 27 ++++++++++-----------------
arch/x86/kernel/trampoline_32.S | 4 ----
3 files changed, 10 insertions(+), 47 deletions(-)
diff --git a/arch/x86/kernel/acpi/realmode/wakeup.S b/arch/x86/kernel/acpi/realmode/wakeup.S
index b4fd836..2a83da1 100644
--- a/arch/x86/kernel/acpi/realmode/wakeup.S
+++ b/arch/x86/kernel/acpi/realmode/wakeup.S
@@ -107,36 +107,10 @@ wakeup_code:
/* Do any other stuff... */
-#ifndef CONFIG_64BIT
- /* This could also be done in C code... */
- movl pmode_cr3, %eax
- movl %eax, %cr3
-
- movl pmode_cr4, %ecx
- jecxz 1f
- movl %ecx, %cr4
-1:
- movl pmode_efer, %eax
- movl pmode_efer + 4, %edx
- movl %eax, %ecx
- orl %edx, %ecx
- jz 1f
- movl $MSR_EFER, %ecx
- wrmsr
-1:
-
- lgdtl pmode_gdt
-
- /* This really couldn't... */
- movl pmode_cr0, %eax
- movl %eax, %cr0
- jmp pmode_return
-#else
pushw $0
pushw trampoline_segment
pushw $0
lret
-#endif
bogus_real_magic:
1:
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 103b6ab..14b00f7 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -20,7 +20,7 @@
unsigned long acpi_realmode_flags;
-#if defined(CONFIG_SMP) && defined(CONFIG_64BIT)
+#ifdef CONFIG_SMP
static char temp_stack[4096];
#endif
@@ -67,14 +67,6 @@ int acpi_suspend_lowlevel(void)
header->wakeup_gdt[2] =
GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff);
-#ifndef CONFIG_64BIT
- store_gdt((struct desc_ptr *)&header->pmode_gdt);
-
- if (rdmsr_safe(MSR_EFER, &header->pmode_efer_low,
- &header->pmode_efer_high))
- header->pmode_efer_low = header->pmode_efer_high = 0;
-#endif /* !CONFIG_64BIT */
-
header->pmode_cr0 = read_cr0();
header->pmode_cr4 = read_cr4_safe();
header->pmode_behavior = 0;
@@ -85,22 +77,23 @@ int acpi_suspend_lowlevel(void)
(1 << WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE);
header->realmode_flags = acpi_realmode_flags;
header->real_magic = 0x12345678;
-
-#ifndef CONFIG_64BIT
- header->pmode_entry = (u32)&wakeup_pmode_return;
- header->pmode_cr3 = (u32)__pa(&initial_page_table);
- saved_magic = 0x12345678;
-#else /* CONFIG_64BIT */
header->trampoline_segment = trampoline_address() >> 4;
#ifdef CONFIG_SMP
stack_start = (unsigned long)temp_stack + sizeof(temp_stack);
early_gdt_descr.address =
(unsigned long)get_cpu_gdt_table(smp_processor_id());
+#ifdef CONFIG_64BIT
initial_gs = per_cpu_offset(smp_processor_id());
#endif
+#endif
+
+#ifdef CONFIG_64BIT
initial_code = (unsigned long)wakeup_long64;
- saved_magic = 0x123456789abcdef0L;
-#endif /* CONFIG_64BIT */
+ saved_magic = 0x123456789abcdef0L;
+#else
+ initial_code = (unsigned long)&wakeup_pmode_return;
+ saved_magic = 0x12345678;
+#endif
do_suspend_lowlevel();
return 0;
diff --git a/arch/x86/kernel/trampoline_32.S b/arch/x86/kernel/trampoline_32.S
index 451c0a7..a726f60 100644
--- a/arch/x86/kernel/trampoline_32.S
+++ b/arch/x86/kernel/trampoline_32.S
@@ -32,8 +32,6 @@
#include <asm/segment.h>
#include <asm/page_types.h>
-#ifdef CONFIG_SMP
-
.section ".x86_trampoline","a"
.balign PAGE_SIZE
.code16
@@ -79,5 +77,3 @@ ENTRY(trampoline_status)
.globl trampoline_end
trampoline_end:
-
-#endif /* CONFIG_SMP */
--
1.7.5.4
^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH 1/2] merge 32 and 64 realmode wakeup code
2011-12-16 20:13 Matthieu CASTET
@ 2012-01-13 18:01 ` Pavel Machek
0 siblings, 0 replies; 11+ messages in thread
From: Pavel Machek @ 2012-01-13 18:01 UTC (permalink / raw)
To: Matthieu CASTET; +Cc: linux-acpi, hpa, linux-kernel, rjw
> - this mean less ifdef in code
> - we could remove now unused field in wakeup_header (pmode_*)
>
> Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
Looks good... was it tested on both 32 and 64 bit?
> - /* This really couldn't... */
> - movl pmode_cr0, %eax
> - movl %eax, %cr0
> - jmp pmode_return
How was this handled?
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2012-01-13 18:01 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-03-13 22:03 [PATCH 1/2] merge 32 and 64 realmode wakeup code matthieu castet
2011-03-13 22:31 ` Rafael J. Wysocki
2011-03-13 23:06 ` H. Peter Anvin
2011-03-15 19:31 ` Pavel Machek
-- strict thread matches above, loose matches on Subject: below --
2011-07-02 17:43 Matthieu CASTET
2011-07-02 22:31 ` H. Peter Anvin
2011-07-03 6:50 ` Rafael J. Wysocki
2011-07-03 20:52 ` matthieu castet
2011-07-03 21:19 ` H. Peter Anvin
2011-12-16 20:13 Matthieu CASTET
2012-01-13 18:01 ` Pavel Machek
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