kernel/git/stable/linux.git/arch/parisc, branch linux-6.2.y

parisc: Ensure page alignment in flush functions

2023-05-11T14:11:32+00:00

commit d755bd2caeb47fd806e12399fe8b56798fa5d2cc upstream. Matthew Wilcox noticed, that if ARCH_HAS_FLUSH_ON_KUNMAP is defined (which is the case for PA-RISC), __kunmap_local() calls kunmap_flush_on_unmap(), which may call the parisc flush functions with a non-page-aligned address and thus the page might not be fully flushed. This patch ensures that flush_kernel_dcache_page_asm() and flush_kernel_dcache_page_asm() will always operate on page-aligned addresses. Signed-off-by: Helge Deller Cc: # v6.0+ Signed-off-by: Greg Kroah-Hartman

parisc: Fix argument pointer in real64_call_asm()

2023-05-11T14:11:32+00:00

commit 6e3220ba3323a2c24be834aebf5d6e9f89d0993f upstream. Fix the argument pointer (ap) to point to real-mode memory instead of virtual memory. It's interesting that this issue hasn't shown up earlier, as this could have happened with any 64-bit PDC ROM code. I just noticed it because I suddenly faced a HPMC while trying to execute the 64-bit STI ROM code of an Visualize-FXe graphics card for the STI text console. Signed-off-by: Helge Deller Cc: Signed-off-by: Greg Kroah-Hartman

parisc: Wire up PTRACE_GETREGS/PTRACE_SETREGS for compat case

2023-02-01T20:42:37+00:00

Wire up the missing ptrace requests PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS when running 32-bit applications on 64-bit kernels. Signed-off-by: Helge Deller Cc: stable@vger.kernel.org # 4.7+

parisc: Replace hardcoded value with PRIV_USER constant in ptrace.c

2023-02-01T20:42:36+00:00

Prefer usage of the PRIV_USER constant over the hard-coded value to set the lowest 2 bits for the userspace privilege. Signed-off-by: Helge Deller Cc: stable@vger.kernel.org # 5.16+

parisc: Fix return code of pdc_iodc_print()

2023-01-09T08:51:56+00:00

There is an off-by-one if the printed string includes a new-line char. Cc: stable@vger.kernel.org Signed-off-by: Helge Deller

Merge tag 'parisc-for-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

2022-12-20T14:43:53+00:00

Pull parisc updates from Helge Deller: "There is one noteable patch, which allows the parisc kernel to use the same MADV_xxx constants as the other architectures going forward. With that change only alpha has one entry left (MADV_DONTNEED is 6 vs 4 on others) which is different. To prevent an ABI breakage, a wrapper is included which translates old MADV values to the new ones, so existing userspace isn't affected. Reason for that patch is, that some applications wrongly used the standard MADV_xxx values even on some non-x86 platforms and as such those programs failed to run correctly on parisc (examples are qemu-user, tor browser and boringssl). Then the kgdb console and the LED code received some fixes, and some 0-day warnings are now gone. Finally, the very last compile warning which was visible during a kernel build is now fixed too (in the vDSO code). The majority of the patches are tagged for stable series and in summary this patchset is quite small and drops more code than it adds: Fixes: - Fix potential null-ptr-deref in start_task() - Fix kgdb console on serial port - Add missing FORCE prerequisites in Makefile - Drop PMD_SHIFT from calculation in pgtable.h Enhancements: - Implement a wrapper to align madvise() MADV_* constants with other architectures - If machine supports running MPE/XL, show the MPE model string Cleanups: - Drop duplicate kgdb console code - Indenting fixes in setup_cmdline()" * tag 'parisc-for-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Show MPE/iX model string at bootup parisc: Add missing FORCE prerequisites in Makefile parisc: Move pdc_result struct to firmware.c parisc: Drop locking in pdc console code parisc: Drop duplicate kgdb_pdc console parisc: Fix locking in pdc_iodc_print() firmware call parisc: Drop PMD_SHIFT from calculation in pgtable.h parisc: Align parisc MADV_XXX constants with all other architectures parisc: led: Fix potential null-ptr-deref in start_task() parisc: Fix inconsistent indenting in setup_cmdline()

parisc: Show MPE/iX model string at bootup

2022-12-19T15:08:52+00:00

Some (mostly 64-bit machines) machines allow to run MPE/iX and report the MPE model string via firmware call. Enhance the pdc_model_sysmodel() function to report that model string. Note that some 32-bit machines like the B160L wrongly report success for the firmware call, so include a check to prevent showing wrong info. Signed-off-by: Helge Deller

parisc: Add missing FORCE prerequisites in Makefile

2022-12-18T21:18:49+00:00

Fix those make warnings: arch/parisc/kernel/vdso32/Makefile:30: FORCE prerequisite is missing arch/parisc/kernel/vdso64/Makefile:30: FORCE prerequisite is missing Add the missing FORCE prerequisites for all build targets identified by "make help". Fixes: e1f86d7b4b2a5213 ("kbuild: warn if FORCE is missing for if_changed(_dep,_rule) and filechk") Signed-off-by: Helge Deller Cc: # 5.18+

parisc: Move pdc_result struct to firmware.c

2022-12-18T21:18:49+00:00

Signed-off-by: Helge Deller

parisc: Drop locking in pdc console code

2022-12-18T21:18:49+00:00

No need to have specific locking for console I/O since the PDC functions provide an own locking. Signed-off-by: Helge Deller Cc: # 6.1+