This is a note to let you know that I've just added the patch titled
parisc/firmware: Fix F-extend for PDC addresses
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
parisc-firmware-fix-f-extend-for-pdc-addresses.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 735ae74f73e55c191d48689bd11ff4a06ea0508f Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@xxxxxx>
Date: Wed, 3 Jan 2024 21:02:16 +0100
Subject: parisc/firmware: Fix F-extend for PDC addresses
From: Helge Deller <deller@xxxxxx>
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@xxxxxxxxxxxxxxx
Signed-off-by: Helge Deller <deller@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/parisc/kernel/firmware.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -127,10 +127,10 @@ static unsigned long f_extend(unsigned l
#ifdef CONFIG_64BIT
if(unlikely(parisc_narrow_firmware)) {
if((address & 0xff000000) == 0xf0000000)
- return 0xf0f0f0f000000000UL | (u32)address;
+ return (0xfffffff0UL << 32) | (u32)address;
if((address & 0xf0000000) == 0xf0000000)
- return 0xffffffff00000000UL | (u32)address;
+ return (0xffffffffUL << 32) | (u32)address;
}
#endif
return address;
Patches currently in stable-queue which might be from deller@xxxxxx are
queue-4.19/parisc-firmware-fix-f-extend-for-pdc-addresses.patch
