Add interrupt controller properties now that spmi-gpio is a proper
hierarchical IRQ chip. The interrupts property is no longer needed so
remove it.
This change was not tested on any hardware but the same change was
tested on qcom-pm8941.dtsi using a LG Nexus 5 (hammerhead) phone with
no issues.
Add interrupt controller properties now that spmi-gpio is a proper
hierarchical IRQ chip. The interrupts property is no longer needed so
remove it.
This change was not tested on any hardware but the same change was
tested on qcom-pm8941.dtsi using a LG Nexus 5 (hammerhead) phone with
no issues.
Add interrupt controller properties now that spmi-gpio is a proper
hierarchical IRQ chip. The interrupts property is no longer needed so
remove it.
This change was not tested on any hardware but the same change was
tested on qcom-pm8941.dtsi using a LG Nexus 5 (hammerhead) phone with
no issues.
Now that spmi-gpio is a proper hierarchical IRQ chip, and all in-tree
users of device tree have been updated, we can now drop the hack that
was introduced to disassociate the old Linux virq if a hwirq mapping
already exists. That patch was introduced to not break git bisect for
any existing
Convert the spmi-pmic-arb IRQ code to use the version 2 IRQ interface
in order to support hierarchical IRQ chips. This is necessary so that
spmi-gpio can be setup as a hierarchical IRQ chip with pmic-arb as the
parent. IRQ chips in device tree should be usable from the start without
the consumer
Add support for qcom,pm8005-gpio, qcom,pm8998-gpio, and
qcom,pmi8998-gpio. These three variants are already in use in some
arm64 dtsi files. Those boards work since the generic binding
qcom,spmi-gpio is also specified.
Signed-off-by: Brian Masney
Reviewed-by: Stephen Boyd
Reviewed-by: Bjorn
The probing of this driver calls platform_irq_count, which will
setup all of the IRQs that are configured in device tree. In
preparation for converting this driver to be a hierarchical IRQ
chip, hardcode the IRQ count based on the hardware type so that all
the IRQs are not configured immediately
Add interrupt controller properties now that spmi-gpio is a proper
hierarchical IRQ chip. The interrupts property is no longer needed so
remove it. Code was tested on the LG Nexus 5 (hammerhead) phone.
Signed-off-by: Brian Masney
Reviewed-by: Stephen Boyd
Reviewed-by: Bjorn Andersson
---
Check to see if the hwirq is already associated with another virq on
this IRQ domain. If so, then disassociate it before associating the
hwirq with the new virq.
This is a temporary hack that is needed in order to not break git
bisect for existing boards. The next patch in this series converts
This adds the two new functions gpiochip_irq_domain_activate and
gpiochip_irq_domain_deactivate that can be used as the activate and
deactivate functions in the struct irq_domain_ops. This is for
situations where only gpiochip_{lock,unlock}_as_irq needs to be called.
SPMI and SSBI GPIO are two
This patch series adds hierarchical IRQ chip support to spmi-gpio so
that device tree consumers can request an IRQ directly from the GPIO
block rather than having to request an IRQ from the underlying PMIC.
For more background information, see the email thread with Linus
Walleij's excellent
On Wed, Jan 16, 2019 at 4:13 PM Fenghua Yu wrote:
>
> On Wed, Jan 16, 2019 at 04:00:29PM -0800, Andy Lutomirski wrote:
> > On Wed, Jan 16, 2019 at 1:24 PM Fenghua Yu wrote:
> > >
> > > IA32_UMWAIT_CONTROL[31:2] determines the maximum time in TSC-quanta
> > > that processor can stay in C0.1 or
On Wed, Jan 16, 2019 at 4:01 PM shuah wrote:
>
> Hi Kees and James,
>
> seccomp_bpf test hangs right after the following test passes
> with EBUSY. Please see log at the end.
>
> /* Installing a second listener in the chain should EBUSY */
> EXPECT_EQ(user_trap_syscall(__NR_getpid,
>
On Tue, 2019-01-15 at 00:47:45 UTC, "Jason A. Donenfeld" wrote:
> Commit 0e759bd75285 moved around the declaration of pnv_npu2_init, but
> did not conditionalize it inside of the PCI pSeries driver. This meant
> that CONFIG_PCI && CONFIG_PPC_PSERIES && !CONFIG_PPC_POWERNV resulted
> in:
>
>
The test_insert_dup() function from lib/test_rhashtable.c passes a
pointer to a stack object to rhltable_init(). Allocate the hash table
dynamically to avoid that the following is reported with object
debugging enabled:
ODEBUG: object (ptrval) is on stack (ptrval), but NOT annotated.
WARNING:
On Thu, 2019-01-17 at 00:13 +, Colin King wrote:
> From: Colin Ian King
>
> There is an if statement and a return statement that are incorrectly
> indented. Fix these.
[]
> diff --git a/drivers/net/sb1000.c b/drivers/net/sb1000.c
[]
> @@ -540,12 +540,12 @@ sb1000_activate(const int ioaddr[],
On 1/10/19 1:09 PM, Khalid Aziz wrote:
From: Julian Stecklina
We can reduce spin lock usage in xpfo_kmap to the 0->1 transition of
the mapcount. This means that xpfo_kmap() can now race and that we
get spurious page faults.
The page fault handler helps the system make forward progress by
On Wed, Jan 16, 2019 at 04:00:29PM -0800, Andy Lutomirski wrote:
> On Wed, Jan 16, 2019 at 1:24 PM Fenghua Yu wrote:
> >
> > IA32_UMWAIT_CONTROL[31:2] determines the maximum time in TSC-quanta
> > that processor can stay in C0.1 or C0.2.
> >
> > The maximum time value in IA32_UMWAIT_CONTROL[31-2]
From: Colin Ian King
There is an if statement and a return statement that are incorrectly
indented. Fix these.
Signed-off-by: Colin Ian King
---
drivers/net/sb1000.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/sb1000.c b/drivers/net/sb1000.c
index
The top Makefile does not need to export KBUILD_VMLINUX_INIT and
KBUILD_VMLINUX_MAIN separately.
Put every built-in.a into KBUILD_VMLINUX_OBJS. The order of
$(head-y), $(init-y), $(core-y), ... is still retained.
Signed-off-by: Masahiro Yamada
---
Changes in v3:
- update the document
Changes
The symbol table in the final archive is unneeded; the linker does not
require the symbol table after the --whole-archive option. Every object
file in the archive is included in the link anyway.
Pass thin archives from subdirectories directly to the linker, and
remove the final archiving step.
On Tue, Jan 15, 2019 at 8:58 AM Jan Beulich wrote:
>
> While in the native case entry into the kernel happens on the trampoline
> stack, PV Xen kernels get entered with the current thread stack right
> away. Hence source and destination stacks are identical in that case,
> and special care is
Hi Jon,
On Tue, Jan 15, 2019 at 02:38:59PM -0700, Jonathan Corbet wrote:
> On Tue, 15 Jan 2019 22:37:01 +0200
>
> I'd rather see you put the new stuff under Documentation/driver-api, either
> in a standalone file or in a new subdirectory.
>
> Thanks for your patience with this! We really do
From: Colin Ian King
There are two lines that have indentation issues, fix these. Also remove
an empty line.
Signed-off-by: Colin Ian King
---
drivers/net/ethernet/jme.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/jme.c
Hi Kees and James,
seccomp_bpf test hangs right after the following test passes
with EBUSY. Please see log at the end.
/* Installing a second listener in the chain should EBUSY */
EXPECT_EQ(user_trap_syscall(__NR_getpid,
On Wed, Jan 16, 2019 at 1:24 PM Fenghua Yu wrote:
>
> IA32_UMWAIT_CONTROL[31:2] determines the maximum time in TSC-quanta
> that processor can stay in C0.1 or C0.2.
>
> The maximum time value in IA32_UMWAIT_CONTROL[31-2] is set as zero which
> means there is no global time limit for UMWAIT and
From: Colin Ian King
There is a goto statement that indented too deeply, fix it.
Signed-off-by: Colin Ian King
---
drivers/net/ethernet/neterion/vxge/vxge-main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/neterion/vxge/vxge-main.c
On 2019/1/17 上午12:32, Konrad Rzeszutek Wilk wrote:
> On Tue, Jan 08, 2019 at 04:24:32PM +0800, Dongli Zhang wrote:
>> oops. Please ignore this v5 patch.
>>
>> I just realized Linus suggested in an old email not use BUG()/BUG_ON() in
>> the code.
>>
>> I will switch to the WARN() solution and
On Wed, 16 Jan 2019 at 03:36, Suzuki K Poulose wrote:
>
> Hi Mathieu,
>
> On 15/01/2019 23:07, Mathieu Poirier wrote:
> > This patch uses the information conveyed by perf_event::attr::config2
> > to select a sink to use for the session. That way a sink can easily be
> > selected to be used by
On Wed, Jan 16, 2019 at 1:24 PM Fenghua Yu wrote:
>
> UMWAIT or TPAUSE called by user process makes processor to reside in
> a light-weight power/performance optimized state (C0.1 state) or an
> improved power/performance optimized state (C0.2 state).
>
> IA32_UMWAIT_CONTROL MSR register allows
On 1/16/19 3:06 PM, Florian Fainelli wrote:
> On 1/16/19 2:29 PM, Andrew Lunn wrote:
>>> diff --git a/include/net/dsa.h b/include/net/dsa.h
>>> index b3eefe8e18fd..6178b648d08a 100644
>>> --- a/include/net/dsa.h
>>> +++ b/include/net/dsa.h
>>> @@ -21,6 +21,7 @@
>>> #include
>>> #include
>>>
On Wed, Jan 16, 2019 at 02:34:53PM +0100, Christophe Leroy wrote:
> Le 16/01/2019 à 14:16, Jonathan Neuschäfer a écrit :
> > On Wed, Jan 16, 2019 at 07:55:29AM +0100, Christophe Leroy wrote:
> > > Le 16/01/2019 à 01:35, Jonathan Neuschäfer a écrit :
> > > > Thinning the kernel down a bit actually
The symbol table in the final archive is unneeded; the linker does not
require the symbol table after the --whole-archive option. Every object
file in the archive is included in the link anyway.
Pass thin archives from subdirectories directly to the linker, and
remove the final archiving step.
The top Makefile does not need to export KBUILD_VMLINUX_INIT and
KBUILD_VMLINUX_MAIN separately.
Put every built-in.a into KBUILD_VMLINUX_OBJS. The order of
$(head-y), $(init-y), $(core-y), ... is still retained.
Signed-off-by: Masahiro Yamada
---
Changes in v2: None
Makefile
Good evening Suzuki,
On Wed, 16 Jan 2019 at 03:29, Suzuki K Poulose wrote:
>
>
>
> On 15/01/2019 23:07, Mathieu Poirier wrote:
> > Add a "sinks" directory entry so that users can see all the sinks
> > available in the system in a single place. Individual sink are added
> > as they are
On Fri, 11 Jan 2019, Casey Schaufler wrote:
> >From 47134986133c822e1d88860fa2b108f92c97a7ff Mon Sep 17 00:00:00 2001
> From: Casey Schaufler
> Date: Fri, 11 Jan 2019 17:31:50 -0800
> Subject: [PATCH 1/2] LSM: Check for NULL cred-security on free
>
> Check that the cred security blob has been
Hi all,
After merging the akpm-current tree, today's linux-next build (any sh
config) failed like this:
make[2]: *** No rule to make target '/kisskb/src/scripts/syscalltbl.sh', needed
by 'arch/sh/include/generated/asm/syscall_table.h'. Stop.
make[1]: *** [arch/sh/Makefile:232: archheaders]
Specify the relative CPU capacity of all SDM845 AP cores.
The values were provided by Qualcomm engineers.
Signed-off-by: Matthias Kaehlcke
---
arch/arm64/boot/dts/qcom/sdm845.dtsi | 8
1 file changed, 8 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi
Hi Jane,
On Wed, Jan 16, 2019 at 09:56:02AM -0800, Jane Chu wrote:
> Hi, Naoya,
>
> On 1/16/2019 1:30 AM, Naoya Horiguchi wrote:
>
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index 7c72f2a95785..831be5ff5f4d 100644
> --- a/mm/memory-failure.c
> +++
On Wed, Jan 16, 2019 at 03:01:39PM -0800, Dave Hansen wrote:
> On 1/16/19 11:16 AM, Jerome Glisse wrote:
> >> We also rework the old error message a bit since we do not get
> >> the conflicting entry back: only an indication that we *had* a
> >> conflict.
> > We should keep the device private
Hello
On 1/16/19 4:04 PM, Pavel Machek wrote:
> Hi!
>
> ..snip. Let me read it and reply when I have a time.
>
>>> You know what? First, submit driver with similar functionality to
>>> existing RGB drivers, using same interface existing drivers are
>>> using. When that is accepted, we can talk
s
On Wed, Jan 16, 2019 at 1:46 PM Douglas Anderson wrote:
>
> The bindings for Qualcomm opp levels changed after being Acked but
> before landing. Thus the code in the GPU driver that was relying on
> the old bindings is now broken.
>
> Let's change the code to match the new bindings by
From: "Michael S. Tsirkin"
Date: Mon, 14 Jan 2019 20:34:26 -0500
> Use napi_consume_skb() to get bulk free. Note that napi_consume_skb is
> safe to call in a non-napi context as long as the napi_budget flag is
> correct.
>
> Signed-off-by: Michael S. Tsirkin
> ---
>
> My perf testing setup
Quoting Lubomir Rintel (2019-01-16 09:26:31)
> On Wed, 2019-01-16 at 08:37 -0800, Stephen Boyd wrote:
> > Quoting Lubomir Rintel (2019-01-16 01:35:05)
> > > There could be vital functionality running on the SP PJ1 core it can not
> > > be
> > > restarted just by turning the clock back on.
> > >
From: Shuah Khan
Update email address in MAINTAINERS entries.
Signed-off-by: Shuah Khan
---
MAINTAINERS | 3 +++
1 file changed, 3 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 4d04cebb4a71..6ca780f24808 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3979,6 +3979,7 @@ F:
On Thu, Dec 20 2018 at 13:03 -0700, Stephen Boyd wrote:
Quoting Lina Iyer (2018-12-19 14:11:03)
+
+static int msm_gpio_domain_alloc(struct irq_domain *domain, unsigned int virq,
+unsigned int nr_irqs, void *arg)
+{
+ int ret;
+ irq_hw_number_t hwirq;
Hi Christian,
On 1/16/19 3:27 PM, Christian Brauner wrote:
This adds the promised selftest for binderfs. It will verify the following
things:
- binderfs mounting works
- binder device allocation works
- performing a binder ioctl() request through a binderfs device works
- binder device removal
When freeing a page with an order >= shuffle_page_order randomly select
the front or back of the list for insertion.
While the mm tries to defragment physical pages into huge pages this can
tend to make the page allocator more predictable over time. Inject the
front-back randomness to preserve
Randomization of the page allocator improves the average utilization of
a direct-mapped memory-side-cache. Memory side caching is a platform
capability that Linux has been previously exposed to in HPC
(high-performance computing) environments on specialty platforms. In
that instance it was a
Changes since v7 [1]:
* Make the functionality available to non-ACPI_NUMA builds (Kees)
* Mark the shuffle_state configuration variable __ro_after_init, since
it is not meant to be changed after boot. (Kees)
* Collect Reviewed-by tag from Kees on patch1 and patch3
[1]:
In preparation for runtime randomization of the zone lists, take all
(well, most of) the list_*() functions in the buddy allocator and put
them in helper functions. Provide a common control point for injecting
additional behavior when freeing pages.
Cc: Michal Hocko
Cc: Dave Hansen
From: lepton
Date: Wed, 16 Jan 2019 14:27:45 -0800
> I sent another version with signed off serveral days ago:
>
> https://www.spinics.net/lists/netdev/msg543829.html
>
> So for some reason it got missed?
I didn't see it before I applied the initial patch because I was
heavily backlogged, I
On Wed, Jan 16, 2019 at 05:16:03PM +0530, Balakrishna Godavarthi wrote:
> During hci down we observed IBS sleep commands are queued in the Tx
> buffer and hci_uart_write_work is sending data to the chip which is
> not required as the chip is powered off. This patch will disable IBS
> and flush the
On Tue, Jan 15, 2019 at 04:49:16PM -0500, Chuck Lever wrote:
>
>
> On Jan 15, 2019, at 4:11 PM, Gustavo A. R. Silva
> wrote:
>
> > One of the more common cases of allocation size calculations is finding
> > the size of a structure that has a zero-sized array at the end, along
> > with memory
On 1/16/19 2:29 PM, Andrew Lunn wrote:
>> diff --git a/include/net/dsa.h b/include/net/dsa.h
>> index b3eefe8e18fd..6178b648d08a 100644
>> --- a/include/net/dsa.h
>> +++ b/include/net/dsa.h
>> @@ -21,6 +21,7 @@
>> #include
>> #include
>> #include
>> +#include
>> #include
>> #include
>
Hi!
> Yeah the scripts in droid4-sms-tools git repo work for me for sending
> and receiving. They do not work with cdma currently as the format is
> different.
>
> Maybe you've managed to change the mode of the modem to queue the
> messages with the at commands to the usb port?
I did not have
Every step ends by calling cmd_finalize (via finalize_and_send)
yet every step adds the token OPAL_ENDLIST on its own. Moving
this into cmd_finalize decreases code duplication.
Co-authored-by: Jonas Rabenstein
Signed-off-by: David Kozub
Signed-off-by: Jonas Rabenstein
---
block/sed-opal.c |
response_get_{string,u64} include error handling for argument resp being
NULL but response_get_token does not handle this.
Make all three of response_get_{string,u64,token} handle NULL resp in
the same way.
Co-authored-by: Jonas Rabenstein
Signed-off-by: David Kozub
Signed-off-by: Jonas
Check whether the shadow mbr does fit in the provided space on the
target. Also a proper firmware should handle this case and return an
error we may prevent problems or even damage with crappy firmwares.
Signed-off-by: Jonas Rabenstein
---
block/opal_proto.h | 16
Originally each of the opal functions that call next include
opal_discovery0 in the array of steps. This is superfluous and
can be done always inside next.
Signed-off-by: David Kozub
---
block/sed-opal.c | 88 +++-
1 file changed, 42 insertions(+), 46
This should make no change in functionality.
The formatting changes were triggered by checkpatch.pl.
Signed-off-by: David Kozub
---
block/sed-opal.c | 19 +++
1 file changed, 11 insertions(+), 8 deletions(-)
diff --git a/block/sed-opal.c b/block/sed-opal.c
index
All add_token_* functions have a common set of conditions that have to
be checked. Use a common function for those checks in order to avoid
different behaviour as well as code duplication.
Co-authored-by: David Kozub
Signed-off-by: Jonas Rabenstein
Signed-off-by: David Kozub
---
Every step starts with resetting the cmd buffer as well as the comid and
constructs the appropriate OPAL_CALL command. Consequently, those
actions may be combined into one generic function. On should take care
that the opening and closing tokens for the argument list are already
emitted by
Instead of having multiple places defining the same argument list to get
a specific column of a sed-opal table, provide a generic version and
call it from those functions.
Signed-off-by: Jonas Rabenstein
---
block/opal_proto.h | 2 +
block/sed-opal.c | 132
Add function address (and if available its symbol) to the message if a
step function fails.
Signed-off-by: Jonas Rabenstein
---
block/sed-opal.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/sed-opal.c b/block/sed-opal.c
index 1332547e5a99..4225f23b2165 100644
This patch series extends OPAL support: it adds IOCTL for setting the shadow
MBR done flag which can be useful for unlocking an OPAL disk on boot and it adds
IOCTL for writing to the shadow MBR. Also included are some minor fixes and
improvements.
This series is based on the original work done by
Enable users to mark the shadow mbr as done without completely
deactivating the shadow mbr feature. This may be useful on reboots,
when the power to the disk is not disconnected in between and the shadow
mbr stores the required boot files. Of course, this saves also the
(few) commands required to
Also the values of OPAL_UID_LENGTH and OPAL_METHOD_LENGTH are the same,
it is weird to use OPAL_UID_LENGTH for the definition of the methods.
Signed-off-by: Jonas Rabenstein
---
block/sed-opal.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/sed-opal.c
response_get_token had already been in place, its functionality had
been duplicated within response_get_{u64,bytestring} with the same error
handling. Unify the handling by reusing response_get_token within the
other functions.
Co-authored-by: Jonas Rabenstein
Signed-off-by: David Kozub
Split the header generation from the (normal) memcpy part if a
bytestring is copied into the command buffer. This allows in-place
generation of the bytestring content. For example, copy_from_user may be
used without an intermediate buffer.
Signed-off-by: Jonas Rabenstein
---
block/sed-opal.c |
The steps argument is only read by the next function, so it can
be passed directly as an argument rather than via opal_dev.
Normally, the steps is an array on the stack, so the pointer stops
being valid then the function that set opal_dev.steps returns.
If opal_dev.steps was not set to NULL
On Monday, January 14, 2019 5:34:54 PM CET Amit Kucheria wrote:
> All cpufreq drivers do similar things to register as a cooling device.
> Provide a cpufreq driver flag so drivers can just ask the cpufreq core
> to register the cooling device on their behalf. This allows us to get
> rid of
Allow modification of the shadow mbr. If the shadow mbr is not marked as
done, this data will be presented read only as the device content. Only
after marking the shadow mbr as done and unlocking a locking range the
actual content is accessible.
Co-authored-by: David Kozub
Signed-off-by: Jonas
Quoting Stephen Boyd (2019-01-16 14:49:58)
> > >
> > > Do we need #size-cells = <2>? Maybe it could be #size-cells = <1> and we
> > > can avoid having to specify a second size entry that's always going to
> > > be 0 because we don't have devices with huge IO regions in the SoC. Or
> > > does it
On 1/16/19 11:16 AM, Jerome Glisse wrote:
>> We also rework the old error message a bit since we do not get
>> the conflicting entry back: only an indication that we *had* a
>> conflict.
> We should keep the device private check (moving it in __request_region)
> as device private can try to
On Tue, Jan 15, 2019 at 10:18:02PM -0800, Guenter Roeck wrote:
> On Wed, Dec 26, 2018 at 03:03:19PM +0800, Cheng-Yi Chiang wrote:
> > Add a codec driver to control ChromeOS EC codec.
> >
> > Use EC Host command to enable/disable I2S recording and control other
> > configurations.
> >
> >
On Monday, January 14, 2019 5:34:53 PM CET Amit Kucheria wrote:
> Several cpufreq drivers register themselves as thermal cooling devices.
> Adding a pointer to struct cpufreq_policy removes the need for them to
> store this pointer in a private data structure.
>
> We can then auto-register the
On Monday, January 14, 2019 5:34:55 PM CET Amit Kucheria wrote:
> Minor clean-up to use BIT() and keep checkpatch happy. Clean up the
> comment formatting while we're at it to make it easier to read.
>
> Signed-off-by: Amit Kucheria
Can you please do this cleanup as the first patch in the
On Wed, 16 Jan 2019, Andrew F. Davis wrote:
> On 1/16/19 9:19 AM, Brian Starkey wrote:
> > Hi :-)
> >
> > On Tue, Jan 15, 2019 at 12:40:16PM -0600, Andrew F. Davis wrote:
> >> On 1/15/19 12:38 PM, Andrew F. Davis wrote:
> >>> On 1/15/19 11:45 AM, Liam Mark wrote:
> On Tue, 15 Jan 2019,
Hello,
Jarkko Sakkinen writes:
> Added the tests that I've been using for testing TPM 2.0 functionality
> for long time but have out-of-tree so far residing in
>
> https://github.com/jsakkine-intel/tpm2-scripts
>
> Cc: Tadeusz Struk
> Signed-off-by: Jarkko Sakkinen
> Acked-By: Joey
On Wed, Jan 16, 2019 at 09:50:16AM -0500, Jerome Glisse wrote:
> On Wed, Jan 16, 2019 at 03:34:55PM +1100, Dave Chinner wrote:
> > On Tue, Jan 15, 2019 at 09:23:12PM -0500, Jerome Glisse wrote:
> > > On Tue, Jan 15, 2019 at 06:01:09PM -0800, Dan Williams wrote:
> > > > On Tue, Jan 15, 2019 at 5:56
Update from v3 [3]:
* Raise minimum binutils requirement to use the new instructions directly
* Optimize FIND_PERCPU_BASE macro
* Rename some helper functions, __{rd,wr}gsbase_inactive()
* Use NOKPROBE_SYMBOL instead of __kprobes
Update from v2 [2]:
* Separate out the preparatory patches [11]
Quoting Bjorn Andersson (2019-01-16 14:10:03)
> On Wed 16 Jan 13:28 PST 2019, Stephen Boyd wrote:
>
> > Quoting Bjorn Andersson (2019-01-15 23:19:39)
> > > DMA addresses for devices on the soc bus must be constrained to the 36
> > > address bits that the bus provides. When no IOMMU is present
Copy real FS/GSBASE values instead of approximation when FSGSBASE is
enabled.
Factoring out to save_fsgs() does not result in the same behavior because
save_base_legacy() does not copy FS/GSBASE when the index is zero.
Signed-off-by: Chang S. Bae
Cc: Andy Lutomirski
Cc: H. Peter Anvin
Cc:
From: Andy Lutomirski
With the new FSGSBASE instructions, we can efficiently read and write
the FSBASE and GSBASE in __switch_to(). Use that capability to preserve
the full state.
This will enable user code to do whatever it wants with the new
instructions without any kernel-induced gotchas.
The helper functions will switch on faster accesses to FSBASE and GSBASE
when the FSGSBASE feature is enabled.
Accessing user GSBASE needs a couple of SWAPGS operations. It is avoidable
if the user GSBASE is saved at kernel entry, being updated as changes, and
restored back at kernel exit.
On Wed, Jan 16, 2019 at 11:40:50PM +0100, Greg KH wrote:
> On Wed, Jan 16, 2019 at 11:27:45PM +0100, Christian Brauner wrote:
> > This adds the promised selftest for binderfs. It will verify the following
> > things:
> > - binderfs mounting works
> > - binder device allocation works
> > -
GSBASE is used to find per-CPU data in the kernel. But when it is unknown,
the per-CPU base can be found from the per_cpu_offset table with a CPU NR.
The CPU NR is extracted from the limit field of the CPUNODE entry in GDT,
or by the RDPID instruction.
Also, add the GAS-compatible RDPID macro.
From: Andy Lutomirski
This validates that GS and GSBASE are independently preserved across
context switches.
[ chang: Use FSGSBASE instructions directly instead of .byte ]
Signed-off-by: Andy Lutomirski
Reviewed-by: Andi Kleen
Signed-off-by: Chang S. Bae
Cc: H. Peter Anvin
Cc: Thomas
It helps to use some new instructions directly in inline assembly.
Suggested-by: Andi Kleen
Signed-off-by: Chang S. Bae
Cc: Andy Lutomirski
Cc: Linux Torvalds
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: H. Peter Anvin
Cc: Dave Hansen
---
Documentation/process/changes.rst | 6 ++
1 file
From: Andy Lutomirski
Now that FSGSBASE is fully supported, remove unsafe_fsgsbase, enable
FSGSBASE by default, and add nofsgsbase to disable it.
Signed-off-by: Andy Lutomirski
Signed-off-by: Chang S. Bae
Reviewed-by: Andi Kleen
Cc: H. Peter Anvin
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc:
From: Andi Kleen
v2: Minor updates to documentation requested in review.
v3: Update for new gcc and various improvements.
[ chang: Fix some typo. Fix the example code. ]
Signed-off-by: Andi Kleen
Signed-off-by: Chang S. Bae
Cc: Andy Lutomirski
Cc: H. Peter Anvin
Cc: Thomas Gleixner
Cc:
From: Andy Lutomirski
This is temporary. It will allow the next few patches to be tested
incrementally.
Setting unsafe_fsgsbase is a root hole. Don't do it.
[ chang: Minor fix. Add the TAINT_INSECURE flag. ]
Signed-off-by: Andy Lutomirski
Signed-off-by: Chang S. Bae
Reviewed-by: Andi
From: Andi Kleen
Add C intrinsics and assembler macros for the new FSBASE and GSBASE
instructions.
Very straight forward. Used in followon patches.
[ luto: Rename the variables from FS and GS to FSBASE and GSBASE and
make safe to include on 32-bit kernels. ]
v2: Use __always_inline
[
For testing (or root-only) purposes, the new flag will serve to tag the
kernel taint accurately.
When adding a new feature support, patches need to be incrementally
applied and tested with temporal parameters. Currently, there is no flag
for this usage.
Suggested-by: H. Peter Anvin
The FSGSBASE instructions allow fast accesses on GSBASE. Now, at the
paranoid_entry, the per-CPU base value can be always copied to GSBASE.
And the original GSBASE value will be restored at the exit.
So far, GSBASE modification has not been directly allowed from userspace.
So, swapping GSBASE
From: Andi Kleen
The kernel needs to explicitly enable FSGSBASE. So, the application needs
to know if it can safely use these instructions. Just looking at the CPUID
bit is not enough because it may be running in a kernel that does not
enable the instructions.
One way for the application would
Fix potential NULL pointer dereference wich might happen in
beiscsi_alloc_mem(). If kmalloc_array() fails and mem_descr->mem_array
is set to NULL, then its dereferencing happens when passing
mem_descr->mem_array[] to dma_free_coherent().
Signed-off-by: Dmitry Voytik
---
Changes since v1:
-
On Wed, 16 Jan 2019, Andrew F. Davis wrote:
> On 1/15/19 1:05 PM, Laura Abbott wrote:
> > On 1/15/19 10:38 AM, Andrew F. Davis wrote:
> >> On 1/15/19 11:45 AM, Liam Mark wrote:
> >>> On Tue, 15 Jan 2019, Andrew F. Davis wrote:
> >>>
> On 1/14/19 11:13 AM, Liam Mark wrote:
> > On Fri, 11
On Wed, Jan 16, 2019 at 11:27:45PM +0100, Christian Brauner wrote:
> This adds the promised selftest for binderfs. It will verify the following
> things:
> - binderfs mounting works
> - binder device allocation works
> - performing a binder ioctl() request through a binderfs device works
> -
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