linux-toradex.git/Documentation, branch v3.2.47 Linux kernel for Apalis and Colibri modules x86,efi: Implement efi_no_storage_paranoia parameter 2013-05-30T13:35:11+00:00 Richard Weinberger richard@nod.at 2013-04-16T23:00:53+00:00 2a068400fcef7b1563d60f294b584b728236307f commit 8c58bf3eec3b8fc8162fe557e9361891c20758f2 upstream. Using this parameter one can disable the storage_size/2 check if he is really sure that the UEFI does sane gc and fulfills the spec. This parameter is useful if a devices uses more than 50% of the storage by default. The Intel DQSW67 desktop board is such a sucker for exmaple. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Matt Fleming <matt.fleming@intel.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 8c58bf3eec3b8fc8162fe557e9361891c20758f2 upstream.

Using this parameter one can disable the storage_size/2 check if
he is really sure that the UEFI does sane gc and fulfills the spec.

This parameter is useful if a devices uses more than 50% of the
storage by default.
The Intel DQSW67 desktop board is such a sucker for exmaple.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
drm/i915: panel: invert brightness via quirk 2013-04-25T19:25:44+00:00 Carsten Emde C.Emde@osadl.org 2012-03-15T14:56:26+00:00 e1eb40b7e10a98a0895aaf7c78580e89fc494375 commit 4dca20efb1a9c2efefc28ad2867e5d6c3f5e1955 upstream. A machine may need to invert the panel backlight brightness value. This patch adds the infrastructure for a quirk to do so. Signed-off-by: Carsten Emde <C.Emde@osadl.org> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 4dca20efb1a9c2efefc28ad2867e5d6c3f5e1955 upstream.

A machine may need to invert the panel backlight brightness value. This
patch adds the infrastructure for a quirk to do so.

Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
drm/i915: panel: invert brightness via parameter 2013-04-25T19:25:44+00:00 Carsten Emde C.Emde@osadl.org 2012-03-15T14:56:25+00:00 f76bb07cf0f7dde553f141438261797f189ead5e commit 7bd90909bbf9ce7c40e1da3d72b97b93839c188a upstream. Following the documentation of the Legacy Backlight Brightness (LBB) Register in the configuration space of some Intel PCI graphics adapters, setting the LBB register with the value 0x0 causes the backlight to be turned off, and 0xFF causes the backlight to be set to 100% intensity (http://download.intel.com/embedded/processors/Whitepaper/324567.pdf). The Acer Aspire 5734Z, however, turns the backlight off at 0xFF and sets it to maximum intensity at 0. In consequence, the screen of this systems becomes dark at an early boot stage which makes it unusable. The same inversion applies to the BLC_PWM_CTL I915 register. This problem was introduced in kernel version 2.6.38 when the PCI device of this system was first supported by the i915 KMS module. This patch adds a parameter to the i915 module to enable inversion of the brightness variable (i915.invert_brightness). Signed-off-by: Carsten Emde <C.Emde@osadl.org> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 7bd90909bbf9ce7c40e1da3d72b97b93839c188a upstream.

Following the documentation of the Legacy Backlight Brightness (LBB)
Register in the configuration space of some Intel PCI graphics adapters,
setting the LBB register with the value 0x0 causes the backlight to be
turned off, and 0xFF causes the backlight to be set to 100% intensity
(http://download.intel.com/embedded/processors/Whitepaper/324567.pdf).
The Acer Aspire 5734Z, however, turns the backlight off at 0xFF and sets
it to maximum intensity at 0. In consequence, the screen of this systems
becomes dark at an early boot stage which makes it unusable. The same
inversion applies to the BLC_PWM_CTL I915 register. This problem was
introduced in kernel version 2.6.38 when the PCI device of this system
was first supported by the i915 KMS module.

This patch adds a parameter to the i915 module to enable inversion of
the brightness variable (i915.invert_brightness).

Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
tty/serial: Add support for Altera serial port 2013-03-20T15:03:33+00:00 Ley Foon Tan lftan@altera.com 2013-03-07T02:28:37+00:00 3aed32554e8ab466645973aae1809bd8ff33d351 commit e06c93cacb82dd147266fd1bdb2d0a0bd45ff2c1 upstream. Add support for Altera 8250/16550 compatible serial port. Signed-off-by: Ley Foon Tan <lftan@altera.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> [bwh: Backported to 3.2: adjust filenames, context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit e06c93cacb82dd147266fd1bdb2d0a0bd45ff2c1 upstream.

Add support for Altera 8250/16550 compatible serial port.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: adjust filenames, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
doc, kernel-parameters: Document 'console=hvc<n>' 2013-03-06T03:24:14+00:00 Konrad Rzeszutek Wilk konrad.wilk@oracle.com 2013-02-25T20:54:09+00:00 7479d5dd8b13e8b75e7233d094bca7b1935b9914 commit a2fd6419174470f5ae6383f5037d0ee21ed9833f upstream. 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 Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit a2fd6419174470f5ae6383f5037d0ee21ed9833f upstream.

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
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
doc, xen: Mention 'earlyprintk=xen' in the documentation. 2013-03-06T03:24:13+00:00 Konrad Rzeszutek Wilk konrad.wilk@oracle.com 2013-02-25T20:54:08+00:00 560701883d7a0679e9186f145a2e43a77b447cff commit 2482a92e7d17187301d7313cfe5021b13393a0b4 upstream. 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 Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 2482a92e7d17187301d7313cfe5021b13393a0b4 upstream.

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
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
tcp: implement RFC 5961 3.2 2013-01-16T01:13:25+00:00 Eric Dumazet edumazet@google.com 2012-07-17T08:13:05+00:00 61f69dc4e40e41b0018f00fa4aeb23d3239556fb [ Upstream commit 282f23c6ee343126156dd41218b22ece96d747e3 ] Implement the RFC 5691 mitigation against Blind Reset attack using RST bit. Idea is to validate incoming RST sequence, to match RCV.NXT value, instead of previouly accepted window : (RCV.NXT <= SEG.SEQ < RCV.NXT+RCV.WND) If sequence is in window but not an exact match, send a "challenge ACK", so that the other part can resend an RST with the appropriate sequence. Add a new sysctl, tcp_challenge_ack_limit, to limit number of challenge ACK sent per second. Add a new SNMP counter to count number of challenge acks sent. (netstat -s | grep TCPChallengeACK) Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Kiran Kumar Kella <kkiran@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
[ Upstream commit 282f23c6ee343126156dd41218b22ece96d747e3 ]

Implement the RFC 5691 mitigation against Blind
Reset attack using RST bit.

Idea is to validate incoming RST sequence,
to match RCV.NXT value, instead of previouly accepted
window : (RCV.NXT <= SEG.SEQ < RCV.NXT+RCV.WND)

If sequence is in window but not an exact match, send
a "challenge ACK", so that the other part can resend an
RST with the appropriate sequence.

Add a new sysctl, tcp_challenge_ack_limit, to limit
number of challenge ACK sent per second.

Add a new SNMP counter to count number of challenge acks sent.
(netstat -s | grep TCPChallengeACK)

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Kiran Kumar Kella <kkiran@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
hwmon: (coretemp) Add support for Atom CE4110/4150/4170 2013-01-03T03:32:48+00:00 Guenter Roeck linux@roeck-us.net 2012-10-09T20:23:57+00:00 a393ace58e47dffbdfc95d7a6f2db46ef8e2c834 commit 1102dcab849313bd5a340b299b5cf61b518fbc0f upstream. TjMax for the CE4100 series of Atom CPUs was previously reported to be 110 degrees C. cpuinfo logs on the web show existing CPU types CE4110, CE4150, and CE4170, reported as "model name : Intel(R) Atom(TM) CPU CE41{1|5|7}0 @ 1.{2|6}0GHz" with model 28 (0x1c) and stepping 10 (0x0a). Add the three known variants to the tjmax table. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 1102dcab849313bd5a340b299b5cf61b518fbc0f upstream.

TjMax for the CE4100 series of Atom CPUs was previously reported to be
110 degrees C.

cpuinfo logs on the web show existing CPU types CE4110, CE4150, and CE4170,
reported as "model name : Intel(R) Atom(TM) CPU CE41{1|5|7}0 @ 1.{2|6}0GHz"
with model 28 (0x1c) and stepping 10 (0x0a). Add the three known variants
to the tjmax table.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
hwmon: (coretemp) Add support for Atom D2000 and N2000 series CPU models 2013-01-03T03:32:47+00:00 Guenter Roeck linux@roeck-us.net 2012-06-17T16:05:05+00:00 1676fff2a36011956eaa7a5a6c892bb9ddc31e4d commit 5592906f8b01282ea3c2acaf641fd067ad4bb3dc upstream. Document the Atom series D2000 and N2000 (Cedar Trail) as being supported. List and set TjMax for those series. Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: "R, Durgadoss" <durgadoss.r@intel.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit 5592906f8b01282ea3c2acaf641fd067ad4bb3dc upstream.

Document the Atom series D2000 and N2000 (Cedar Trail) as being supported.
List and set TjMax for those series.

Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: "R, Durgadoss" <durgadoss.r@intel.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
hwmon: (coretemp) Improve support of recent Atom CPU models 2013-01-03T03:32:47+00:00 Jean Delvare khali@linux-fr.org 2012-06-17T16:05:05+00:00 9ce8ea33f11cc0fbdff0c837694a302b9e02cbe5 commit fcc14ac1a86931f38da047cf8fb634c6db7b58bc upstream. Document the new Atom series (Tunnel Creek and Medfield) as being supported, and list TjMax for the Atom E600 series. Also enable the Atom tjmax heuristic for these Atom CPU models. Signed-off-by: Jean Delvare <khali@linux-fr.org> Reviewed-by: Guenter Roeck <guenter.roeck@ericsson.com> Cc: Alexander Stein <alexander.stein@systec-electronic.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: "R, Durgadoss" <durgadoss.r@intel.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit fcc14ac1a86931f38da047cf8fb634c6db7b58bc upstream.

Document the new Atom series (Tunnel Creek and Medfield) as being
supported, and list TjMax for the Atom E600 series.

Also enable the Atom tjmax heuristic for these Atom CPU models.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: "R, Durgadoss" <durgadoss.r@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>