* [PATCH 1/3] xen/documentation: Mention 'earlyprintk=xen' in the documentation.
2013-02-25 20:54 [PATCH] Documentation and source code comments updates (v1) Konrad Rzeszutek Wilk
@ 2013-02-25 20:54 ` Konrad Rzeszutek Wilk
2013-02-25 22:13 ` [tip:x86/urgent] doc, xen: " tip-bot for Konrad Rzeszutek Wilk
2013-02-25 20:54 ` [PATCH 2/3] kernel-parameters: Document 'console=hvc<n>' Konrad Rzeszutek Wilk
` (2 subsequent siblings)
3 siblings, 1 reply; 9+ messages in thread
From: Konrad Rzeszutek Wilk @ 2013-02-25 20:54 UTC (permalink / raw)
To: linux-kernel, hpa, gregkh, x86; +Cc: Konrad Rzeszutek Wilk
The earlyprintk for Xen PV guests utilizes a simple hypercall
(console_io) to provide output to Xen emergency console.
Note that the Xen hypervisor should be booted with 'loglevel=all'
to output said information.
Reported-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
Documentation/kernel-parameters.txt | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 7660877..73d51ed 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -757,6 +757,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
earlyprintk= [X86,SH,BLACKFIN]
earlyprintk=vga
+ earlyprintk=xen
earlyprintk=serial[,ttySn[,baudrate]]
earlyprintk=ttySn[,baudrate]
earlyprintk=dbgp[debugController#]
@@ -774,6 +775,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
The VGA output is eventually overwritten by the real
console.
+ The xen output can only be used by Xen PV guests.
+
ekgdboc= [X86,KGDB] Allow early kernel console debugging
ekgdboc=kbd
--
1.8.0.2
^ permalink raw reply related [flat|nested] 9+ messages in thread* [tip:x86/urgent] doc, xen: Mention 'earlyprintk=xen' in the documentation.
2013-02-25 20:54 ` [PATCH 1/3] xen/documentation: Mention 'earlyprintk=xen' in the documentation Konrad Rzeszutek Wilk
@ 2013-02-25 22:13 ` tip-bot for Konrad Rzeszutek Wilk
0 siblings, 0 replies; 9+ messages in thread
From: tip-bot for Konrad Rzeszutek Wilk @ 2013-02-25 22:13 UTC (permalink / raw)
To: linux-tip-commits
Cc: linux-kernel, hpa, mingo, konrad.wilk, stable, tglx, hpa
Commit-ID: 2482a92e7d17187301d7313cfe5021b13393a0b4
Gitweb: http://git.kernel.org/tip/2482a92e7d17187301d7313cfe5021b13393a0b4
Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
AuthorDate: Mon, 25 Feb 2013 15:54:08 -0500
Committer: H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Mon, 25 Feb 2013 13:41:18 -0800
doc, xen: Mention 'earlyprintk=xen' in the documentation.
The earlyprintk for Xen PV guests utilizes a simple hypercall
(console_io) to provide output to Xen emergency console.
Note that the Xen hypervisor should be booted with 'loglevel=all'
to output said information.
Reported-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Link: http://lkml.kernel.org/r/1361825650-14031-2-git-send-email-konrad.wilk@oracle.com
Cc: <stable@vger.kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
Documentation/kernel-parameters.txt | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 6c72381..c4cc199 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -754,6 +754,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
earlyprintk= [X86,SH,BLACKFIN]
earlyprintk=vga
+ earlyprintk=xen
earlyprintk=serial[,ttySn[,baudrate]]
earlyprintk=ttySn[,baudrate]
earlyprintk=dbgp[debugController#]
@@ -771,6 +772,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
The VGA output is eventually overwritten by the real
console.
+ The xen output can only be used by Xen PV guests.
+
ekgdboc= [X86,KGDB] Allow early kernel console debugging
ekgdboc=kbd
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH 2/3] kernel-parameters: Document 'console=hvc<n>'
2013-02-25 20:54 [PATCH] Documentation and source code comments updates (v1) Konrad Rzeszutek Wilk
2013-02-25 20:54 ` [PATCH 1/3] xen/documentation: Mention 'earlyprintk=xen' in the documentation Konrad Rzeszutek Wilk
@ 2013-02-25 20:54 ` Konrad Rzeszutek Wilk
2013-02-25 22:14 ` [tip:x86/urgent] doc, kernel-parameters: Document 'console=hvc<n> ' tip-bot for Konrad Rzeszutek Wilk
2013-02-25 20:54 ` [PATCH 3/3] docs: Fix incorrect comment about 64-bit code segment descriptors Konrad Rzeszutek Wilk
2013-02-26 5:08 ` [PATCH] Documentation and source code comments updates (v1) Rob Landley
3 siblings, 1 reply; 9+ messages in thread
From: Konrad Rzeszutek Wilk @ 2013-02-25 20:54 UTC (permalink / raw)
To: linux-kernel, hpa, gregkh, x86; +Cc: Konrad Rzeszutek Wilk
Both the PowerPC hypervisor and Xen hypervisor can utilize the
hvc driver.
CC: gregkh@linuxfoundation.org
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
Documentation/kernel-parameters.txt | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 73d51ed..7b41fba 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -564,6 +564,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
UART at the specified I/O port or MMIO address,
switching to the matching ttyS device later. The
options are the same as for ttyS, above.
+ hvc<n> Use the hypervisor console device <n>. This is for
+ both Xen and PowerPC hypervisors.
If the device connected to the port is not a TTY but a braille
device, prepend "brl," before the device type, for instance
--
1.8.0.2
^ permalink raw reply related [flat|nested] 9+ messages in thread* [tip:x86/urgent] doc, kernel-parameters: Document 'console=hvc<n> '
2013-02-25 20:54 ` [PATCH 2/3] kernel-parameters: Document 'console=hvc<n>' Konrad Rzeszutek Wilk
@ 2013-02-25 22:14 ` tip-bot for Konrad Rzeszutek Wilk
0 siblings, 0 replies; 9+ messages in thread
From: tip-bot for Konrad Rzeszutek Wilk @ 2013-02-25 22:14 UTC (permalink / raw)
To: linux-tip-commits
Cc: linux-kernel, gregkh, hpa, mingo, konrad.wilk, stable, tglx, hpa
Commit-ID: a2fd6419174470f5ae6383f5037d0ee21ed9833f
Gitweb: http://git.kernel.org/tip/a2fd6419174470f5ae6383f5037d0ee21ed9833f
Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
AuthorDate: Mon, 25 Feb 2013 15:54:09 -0500
Committer: H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Mon, 25 Feb 2013 13:42:15 -0800
doc, kernel-parameters: Document 'console=hvc<n>'
Both the PowerPC hypervisor and Xen hypervisor can utilize the
hvc driver.
Cc: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Link: http://lkml.kernel.org/r/1361825650-14031-3-git-send-email-konrad.wilk@oracle.com
Cc: <stable@vger.kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
Documentation/kernel-parameters.txt | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index c4cc199..986614d 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -564,6 +564,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
UART at the specified I/O port or MMIO address,
switching to the matching ttyS device later. The
options are the same as for ttyS, above.
+ hvc<n> Use the hypervisor console device <n>. This is for
+ both Xen and PowerPC hypervisors.
If the device connected to the port is not a TTY but a braille
device, prepend "brl," before the device type, for instance
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH 3/3] docs: Fix incorrect comment about 64-bit code segment descriptors.
2013-02-25 20:54 [PATCH] Documentation and source code comments updates (v1) Konrad Rzeszutek Wilk
2013-02-25 20:54 ` [PATCH 1/3] xen/documentation: Mention 'earlyprintk=xen' in the documentation Konrad Rzeszutek Wilk
2013-02-25 20:54 ` [PATCH 2/3] kernel-parameters: Document 'console=hvc<n>' Konrad Rzeszutek Wilk
@ 2013-02-25 20:54 ` Konrad Rzeszutek Wilk
2013-02-25 22:15 ` [tip:x86/urgent] x86, doc: " tip-bot for Konrad Rzeszutek Wilk
2013-02-26 5:08 ` [PATCH] Documentation and source code comments updates (v1) Rob Landley
3 siblings, 1 reply; 9+ messages in thread
From: Konrad Rzeszutek Wilk @ 2013-02-25 20:54 UTC (permalink / raw)
To: linux-kernel, hpa, gregkh, x86; +Cc: Konrad Rzeszutek Wilk
The AMD64 Architecture Programmer's Manual Volume 2, on page
89 mentions: "If the processor is running in 64-bit mode (L=1),
the only valid setting of the D bit is 0." This matches
with what the code does.
CC: hpa@zytor.com
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
arch/x86/kernel/head_64.S | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index b7de3b2..6859e96 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -48,7 +48,7 @@ L3_START_KERNEL = pud_index(__START_KERNEL_map)
.globl startup_64
startup_64:
/*
- * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 1,
+ * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0,
* and someone has loaded an identity mapped page table
* for us. These identity mapped page tables map all of the
* kernel pages and possibly all of memory.
@@ -159,7 +159,7 @@ startup_64:
jmp 1f
ENTRY(secondary_startup_64)
/*
- * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 1,
+ * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0,
* and someone has loaded a mapped page table.
*
* %rsi holds a physical pointer to real_mode_data.
--
1.8.0.2
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [tip:x86/urgent] x86, doc: Fix incorrect comment about 64-bit code segment descriptors
2013-02-25 20:54 ` [PATCH 3/3] docs: Fix incorrect comment about 64-bit code segment descriptors Konrad Rzeszutek Wilk
@ 2013-02-25 22:15 ` tip-bot for Konrad Rzeszutek Wilk
0 siblings, 0 replies; 9+ messages in thread
From: tip-bot for Konrad Rzeszutek Wilk @ 2013-02-25 22:15 UTC (permalink / raw)
To: linux-tip-commits; +Cc: linux-kernel, hpa, mingo, konrad.wilk, tglx, hpa
Commit-ID: 1256276c98dbcfb009ac8e0687df9a1e291fd149
Gitweb: http://git.kernel.org/tip/1256276c98dbcfb009ac8e0687df9a1e291fd149
Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
AuthorDate: Mon, 25 Feb 2013 15:54:10 -0500
Committer: H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Mon, 25 Feb 2013 13:42:37 -0800
x86, doc: Fix incorrect comment about 64-bit code segment descriptors
The AMD64 Architecture Programmer's Manual Volume 2, on page
89 mentions: "If the processor is running in 64-bit mode (L=1),
the only valid setting of the D bit is 0." This matches
with what the code does.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Link: http://lkml.kernel.org/r/1361825650-14031-4-git-send-email-konrad.wilk@oracle.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
arch/x86/kernel/head_64.S | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 980053c..37f5304 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -49,7 +49,7 @@ L3_START_KERNEL = pud_index(__START_KERNEL_map)
startup_64:
/*
- * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 1,
+ * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0,
* and someone has loaded an identity mapped page table
* for us. These identity mapped page tables map all of the
* kernel pages and possibly all of memory.
@@ -146,7 +146,7 @@ ident_complete:
jmp secondary_startup_64
ENTRY(secondary_startup_64)
/*
- * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 1,
+ * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0,
* and someone has loaded a mapped page table.
*
* %esi holds a physical pointer to real_mode_data.
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH] Documentation and source code comments updates (v1)
2013-02-25 20:54 [PATCH] Documentation and source code comments updates (v1) Konrad Rzeszutek Wilk
` (2 preceding siblings ...)
2013-02-25 20:54 ` [PATCH 3/3] docs: Fix incorrect comment about 64-bit code segment descriptors Konrad Rzeszutek Wilk
@ 2013-02-26 5:08 ` Rob Landley
2013-02-26 16:40 ` Konrad Rzeszutek Wilk
3 siblings, 1 reply; 9+ messages in thread
From: Rob Landley @ 2013-02-26 5:08 UTC (permalink / raw)
To: Konrad Rzeszutek Wilk; +Cc: linux-kernel, hpa, gregkh, x86
On 02/25/2013 02:54:07 PM, Konrad Rzeszutek Wilk wrote:
> Hey,
>
> Three little patches to update the Documentation/kernel-parameters and
> also some of the complex x86 trampoline code.
>
> Nothing serious, just a little cleanup.
Did I miss an attachment?
Rob
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [PATCH] Documentation and source code comments updates (v1)
2013-02-26 5:08 ` [PATCH] Documentation and source code comments updates (v1) Rob Landley
@ 2013-02-26 16:40 ` Konrad Rzeszutek Wilk
0 siblings, 0 replies; 9+ messages in thread
From: Konrad Rzeszutek Wilk @ 2013-02-26 16:40 UTC (permalink / raw)
To: Rob Landley; +Cc: linux-kernel, hpa, gregkh, x86
On Mon, Feb 25, 2013 at 11:08:16PM -0600, Rob Landley wrote:
> On 02/25/2013 02:54:07 PM, Konrad Rzeszutek Wilk wrote:
> >Hey,
> >
> >Three little patches to update the Documentation/kernel-parameters and
> >also some of the complex x86 trampoline code.
> >
> >Nothing serious, just a little cleanup.
>
> Did I miss an attachment?
No? They were part of the email thread.
>
> Rob
^ permalink raw reply [flat|nested] 9+ messages in thread