linux-stable.git/arch/parisc/include, branch linux-6.5.y Linux kernel stable tree parisc/pdc: Add width field to struct pdc_model 2023-11-28T17:15:03+00:00 Helge Deller deller@gmx.de 2023-10-22T09:48:11+00:00 423d3944a2aeeb8eed7084910ce811f3b4209f7c commit 6240553b52c475d9fc9674de0521b77e692f3764 upstream. PDC2.0 specifies the additional PSW-bit field. Signed-off-by: Helge Deller <deller@gmx.de> Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 6240553b52c475d9fc9674de0521b77e692f3764 upstream.

PDC2.0 specifies the additional PSW-bit field.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parisc: Restore __ldcw_align for PA-RISC 2.0 processors 2023-10-10T20:03:04+00:00 John David Anglin dave@parisc-linux.org 2023-09-19T17:51:40+00:00 0779db5863335dfd8deaef882199d269dd6e9abe commit 914988e099fc658436fbd7b8f240160c352b6552 upstream. Back in 2005, Kyle McMartin removed the 16-byte alignment for ldcw semaphores on PA 2.0 machines (CONFIG_PA20). This broke spinlocks on pre PA8800 processors. The main symptom was random faults in mmap'd memory (e.g., gcc compilations, etc). Unfortunately, the errata for this ldcw change is lost. The issue is the 16-byte alignment required for ldcw semaphore instructions can only be reduced to natural alignment when the ldcw operation can be handled coherently in cache. Only PA8800 and PA8900 processors actually support doing the operation in cache. Aligning the spinlock dynamically adds two integer instructions to each spinlock. Tested on rp3440, c8000 and a500. Signed-off-by: John David Anglin <dave.anglin@bell.net> Link: https://lore.kernel.org/linux-parisc/6b332788-2227-127f-ba6d-55e99ecf4ed8@bell.net/T/#t Link: https://lore.kernel.org/linux-parisc/20050609050702.GB4641@roadwarrior.mcmartin.ca/ Cc: stable@vger.kernel.org Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 914988e099fc658436fbd7b8f240160c352b6552 upstream.

Back in 2005, Kyle McMartin removed the 16-byte alignment for
ldcw semaphores on PA 2.0 machines (CONFIG_PA20). This broke
spinlocks on pre PA8800 processors. The main symptom was random
faults in mmap'd memory (e.g., gcc compilations, etc).

Unfortunately, the errata for this ldcw change is lost.

The issue is the 16-byte alignment required for ldcw semaphore
instructions can only be reduced to natural alignment when the
ldcw operation can be handled coherently in cache. Only PA8800
and PA8900 processors actually support doing the operation in
cache.

Aligning the spinlock dynamically adds two integer instructions
to each spinlock.

Tested on rp3440, c8000 and a500.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Link: https://lore.kernel.org/linux-parisc/6b332788-2227-127f-ba6d-55e99ecf4ed8@bell.net/T/#t
Link: https://lore.kernel.org/linux-parisc/20050609050702.GB4641@roadwarrior.mcmartin.ca/
Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parisc: sba-iommu: Fix sparse warnigs 2023-10-06T11:16:08+00:00 Helge Deller deller@gmx.de 2023-08-30T09:49:57+00:00 503b10a1a50756abe2391703d1d2ec728ab5f789 [ Upstream commit c1ebb94071cb4455177bafa619423acb3494d15d ] Fix sparse warnings, as pdir is __le64 *. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit c1ebb94071cb4455177bafa619423acb3494d15d ]

Fix sparse warnings, as pdir is __le64 *.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
parisc: sba: Fix compile warning wrt list of SBA devices 2023-10-06T11:16:08+00:00 Helge Deller deller@gmx.de 2023-08-30T06:10:01+00:00 24aa18b6345a9f58bcc255d13cf5e0edcd586c07 [ Upstream commit eb3255ee8f6f4691471a28fbf22db5e8901116cd ] Fix this makecheck warning: drivers/parisc/sba_iommu.c:98:19: warning: symbol 'sba_list' was not declared. Should it be static? Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit eb3255ee8f6f4691471a28fbf22db5e8901116cd ]

Fix this makecheck warning:
drivers/parisc/sba_iommu.c:98:19: warning: symbol 'sba_list'
	was not declared. Should it be static?

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
parisc: sba_iommu: Fix build warning if procfs if disabled 2023-09-19T10:30:27+00:00 Helge Deller deller@gmx.de 2023-08-30T05:56:04+00:00 ff4f59a022150f4a1939d9fa89aea7b767255795 [ Upstream commit 6428bc7bd3f35e43c8cb7359cb89d83248d339d2 ] Clean up the code, e.g. make proc_mckinley_root static, drop the now empty mckinley header file and remove some unneeded ifdefs around procfs functions. Signed-off-by: Helge Deller <deller@gmx.de> Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202308300800.Jod4sHzM-lkp@intel.com/ Fixes: 77e0ddf097d6 ("parisc: ccio-dma: Create private runway procfs root entry") Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 6428bc7bd3f35e43c8cb7359cb89d83248d339d2 ]

Clean up the code, e.g. make proc_mckinley_root static, drop the now
empty mckinley header file and remove some unneeded ifdefs around procfs
functions.

Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308300800.Jod4sHzM-lkp@intel.com/
Fixes: 77e0ddf097d6 ("parisc: ccio-dma: Create private runway procfs root entry")
Signed-off-by: Sasha Levin <sashal@kernel.org>
parisc: led: Fix LAN receive and transmit LEDs 2023-09-19T10:30:11+00:00 Helge Deller deller@gmx.de 2023-08-27T11:46:11+00:00 81de4949593927fb98fc93a963d1ea595a202a7f commit 4db89524b084f712a887256391fc19d9f66c8e55 upstream. Fix the LAN receive and LAN transmit LEDs, which where swapped up to now. Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 4db89524b084f712a887256391fc19d9f66c8e55 upstream.

Fix the LAN receive and LAN transmit LEDs, which where swapped
up to now.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parisc: ccio-dma: Create private runway procfs root entry 2023-09-13T07:53:49+00:00 Helge Deller deller@gmx.de 2023-08-28T15:29:46+00:00 b1b45a2a2055ba565d72f7f7e8a89b9865d98d35 commit 77e0ddf097d6d4ceaf898e088b133b99e0a97fa0 upstream. Create an own procfs "runway" root entry for the CCIO driver. No need to share it with the sba_iommu driver, as only one of those busses can be active in one machine anyway. Signed-off-by: Helge Deller <deller@gmx.de> Reported-by: kernel test robot <lkp@intel.com> Fixes: 547259580dfa ("parisc: Move proc_mckinley_root and proc_runway_root to sba_iommu") Cc: <stable@vger.kernel.org> # v6.5 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 77e0ddf097d6d4ceaf898e088b133b99e0a97fa0 upstream.

Create an own procfs "runway" root entry for the CCIO driver.
No need to share it with the sba_iommu driver, as only one
of those busses can be active in one machine anyway.

Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 547259580dfa ("parisc: Move proc_mckinley_root and proc_runway_root to sba_iommu")
Cc: <stable@vger.kernel.org> # v6.5
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parisc: ftrace: Add declaration for ftrace_function_trampoline() 2023-08-10T20:51:54+00:00 Helge Deller deller@gmx.de 2023-08-10T20:51:54+00:00 2794f8ecb483b680610968423179005758a5ce63 Make sparse happy by adding declaration for ftrace_function_trampoline(). Signed-off-by: Helge Deller <deller@gmx.de> 
Make sparse happy by adding declaration for
ftrace_function_trampoline().

Signed-off-by: Helge Deller <deller@gmx.de>
parisc: dma: Add prototype for pcxl_dma_start 2023-08-10T17:12:16+00:00 Helge Deller deller@gmx.de 2023-08-10T17:12:16+00:00 a4c59c9adc5f6b2a6b0115e3c4dc1e5127c2a01b Signed-off-by: Helge Deller <deller@gmx.de> 
Signed-off-by: Helge Deller <deller@gmx.de>
parisc: Fix lightweight spinlock checks to not break futexes 2023-08-10T15:32:09+00:00 Helge Deller deller@gmx.de 2023-08-09T07:21:58+00:00 a0f4b7879f2e14986200747d1b545e5daac8c624 The lightweight spinlock checks verify that a spinlock has either value 0 (spinlock locked) and that not any other bits than in __ARCH_SPIN_LOCK_UNLOCKED_VAL is set. This breaks the current LWS code, which writes the address of the lock into the lock word to unlock it, which was an optimization to save one assembler instruction. Fix it by making spinlock_types.h accessible for asm code, change the LWS spinlock-unlocking code to write __ARCH_SPIN_LOCK_UNLOCKED_VAL into the lock word, and add some missing lightweight spinlock checks to the LWS path. Finally, make the spinlock checks dependend on DEBUG_KERNEL. Noticed-by: John David Anglin <dave.anglin@bell.net> Signed-off-by: Helge Deller <deller@gmx.de> Tested-by: John David Anglin <dave.anglin@bell.net> Cc: stable@vger.kernel.org # v6.4+ Fixes: 15e64ef6520e ("parisc: Add lightweight spinlock checks") 
The lightweight spinlock checks verify that a spinlock has either value
0 (spinlock locked) and that not any other bits than in
__ARCH_SPIN_LOCK_UNLOCKED_VAL is set.

This breaks the current LWS code, which writes the address of the lock
into the lock word to unlock it, which was an optimization to save one
assembler instruction.

Fix it by making spinlock_types.h accessible for asm code, change the
LWS spinlock-unlocking code to write __ARCH_SPIN_LOCK_UNLOCKED_VAL into
the lock word, and add some missing lightweight spinlock checks to the
LWS path. Finally, make the spinlock checks dependend on DEBUG_KERNEL.

Noticed-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Tested-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org # v6.4+
Fixes: 15e64ef6520e ("parisc: Add lightweight spinlock checks")