diff options
| author | John David Anglin <dave.anglin@bell.net> | 2024-02-23 18:40:51 +0300 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2024-02-28 00:51:44 +0300 |
| commit | 4603fbaa76b5e703b38ac8cc718102834eb6e330 (patch) | |
| tree | 13c693d452008376e3d2c3d7c0ee0d081b812106 /arch/parisc/include | |
| parent | e5db6a74571a8baf87a116ea39aab946283362ff (diff) | |
| download | linux-4603fbaa76b5e703b38ac8cc718102834eb6e330.tar.xz | |
parisc: Avoid clobbering the C/B bits in the PSW with tophys and tovirt macros
Use add,l to avoid clobbering the C/B bits in the PSW.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v5.10+
Diffstat (limited to 'arch/parisc/include')
| -rw-r--r-- | arch/parisc/include/asm/assembly.h | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/arch/parisc/include/asm/assembly.h b/arch/parisc/include/asm/assembly.h index 5937d5edaba1..000a28e1c5e8 100644 --- a/arch/parisc/include/asm/assembly.h +++ b/arch/parisc/include/asm/assembly.h @@ -97,26 +97,28 @@ * version takes two arguments: a src and destination register. * However, the source and destination registers can not be * the same register. + * + * We use add,l to avoid clobbering the C/B bits in the PSW. */ .macro tophys grvirt, grphys - ldil L%(__PAGE_OFFSET), \grphys - sub \grvirt, \grphys, \grphys + ldil L%(-__PAGE_OFFSET), \grphys + addl \grvirt, \grphys, \grphys .endm - + .macro tovirt grphys, grvirt ldil L%(__PAGE_OFFSET), \grvirt - add \grphys, \grvirt, \grvirt + addl \grphys, \grvirt, \grvirt .endm .macro tophys_r1 gr - ldil L%(__PAGE_OFFSET), %r1 - sub \gr, %r1, \gr + ldil L%(-__PAGE_OFFSET), %r1 + addl \gr, %r1, \gr .endm - + .macro tovirt_r1 gr ldil L%(__PAGE_OFFSET), %r1 - add \gr, %r1, \gr + addl \gr, %r1, \gr .endm .macro delay value |