linux-stable.git/arch/parisc/kernel, branch v5.4.271

parisc/firmware: Fix F-extend for PDC addresses

2024-02-23T07:24:48+00:00

commit 735ae74f73e55c191d48689bd11ff4a06ea0508f upstream.

When running with narrow firmware (64-bit kernel using a 32-bit
firmware), extend PDC addresses into the 0xfffffff0.00000000
region instead of the 0xf0f0f0f0.00000000 region.

This fixes the power button on the C3700 machine in qemu (64-bit CPU
with 32-bit firmware), and my assumption is that the previous code was
really never used (because most 64-bit machines have a 64-bit firmware),
or it just worked on very old machines because they may only decode
40-bit of virtual addresses.

Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller 
Signed-off-by: Greg Kroah-Hartman

parisc/pgtable: Do not drop upper 5 address bits of physical address

2023-11-28T16:50:20+00:00

commit 166b0110d1ee53290bd11618df6e3991c117495a upstream.

When calculating the pfn for the iitlbt/idtlbt instruction, do not
drop the upper 5 address bits. This doesn't seem to have an effect
on physical hardware which uses less physical address bits, but in
qemu the missing bits are visible.

Signed-off-by: Helge Deller 
Cc:  
Signed-off-by: Greg Kroah-Hartman

parisc: Prevent booting 64-bit kernels on PA1.x machines

2023-11-28T16:50:19+00:00

commit a406b8b424fa01f244c1aab02ba186258448c36b upstream.

Bail out early with error message when trying to boot a 64-bit kernel on
32-bit machines. This fixes the previous commit to include the check for
true 64-bit kernels as well.

Signed-off-by: Helge Deller 
Fixes: 591d2108f3abc ("parisc: Add runtime check to prevent PA2.0 kernels on PA1.x machines")
Cc:   # v6.0+
Signed-off-by: Greg Kroah-Hartman

parisc: irq: Make irq_stack_union static to avoid sparse warning

2023-10-10T19:46:39+00:00

[ Upstream commit b1bef1388c427cdad7331a9c8eb4ebbbe5b954b0 ]

Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: drivers: Fix sparse warning

2023-10-10T19:46:39+00:00

[ Upstream commit b137b9d60b8add5620a06c687a71ce18776730b0 ]

Fix "warning: directive in macro's argument list" warning.

Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: Drop loops_per_jiffy from per_cpu struct

2023-09-23T09:00:02+00:00

commit 93346da8ff47cc00f953c7f38a2d6ba11977fc42 upstream.

There is no need to keep a loops_per_jiffy value per cpu. Drop it.

Signed-off-by: Helge Deller 
Cc: Guenter Roeck 
Signed-off-by: Greg Kroah-Hartman

parisc: Fix /proc/cpuinfo output for lscpu

2023-09-23T08:59:55+00:00

commit 9f5ba4b3e1b3c123eeca5d2d09161e8720048b5c upstream.

The lscpu command is broken since commit cab56b51ec0e ("parisc: Fix
device names in /proc/iomem") added the PA pathname to all PA
devices, includig the CPUs.

lscpu parses /proc/cpuinfo and now believes it found different CPU
types since every CPU is listed with an unique identifier (PA
pathname).

Fix this problem by simply dropping the PA pathname when listing the
CPUs in /proc/cpuinfo. There is no need to show the pathname in this
procfs file.

Fixes: cab56b51ec0e ("parisc: Fix device names in /proc/iomem")
Signed-off-by: Helge Deller 
Cc:  # v4.9+
Signed-off-by: Greg Kroah-Hartman

parisc: Improve cache flushing for PCXL in arch_sync_dma_for_cpu()

2023-06-21T13:44:09+00:00

[ Upstream commit 59fa12646d9f56c842b4d5b6418ed77af625c588 ]

Add comment in arch_sync_dma_for_device() and handle the direction flag in
arch_sync_dma_for_cpu().

When receiving data from the device (DMA_FROM_DEVICE) unconditionally
purge the data cache in arch_sync_dma_for_cpu().

Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: Fix flush_dcache_page() for usage from irq context

2023-05-30T11:44:09+00:00

commit 61e150fb310729c98227a5edf6e4a3619edc3702 upstream.

Since at least kernel 6.1, flush_dcache_page() is called with IRQs
disabled, e.g. from aio_complete().

But the current implementation for flush_dcache_page() on parisc
unintentionally re-enables IRQs, which may lead to deadlocks.

Fix it by using xa_lock_irqsave() and xa_unlock_irqrestore()
for the flush_dcache_mmap_*lock() macros instead.

Cc: linux-parisc@vger.kernel.org
Cc: stable@kernel.org # 5.18+
Signed-off-by: Helge Deller 
Signed-off-by: Greg Kroah-Hartman

parisc: Allow to reboot machine after system halt

2023-05-30T11:44:09+00:00

commit 2028315cf59bb899a5ac7e87dc48ecb8fac7ac24 upstream.

In case a machine can't power-off itself on system shutdown,
allow the user to reboot it by pressing the RETURN key.

Cc:  # v4.14+
Signed-off-by: Helge Deller 
Signed-off-by: Greg Kroah-Hartman