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v6.6.99
linux-yocto/arch/sparc
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Ryan Roberts 70ec7d13bb sparc/mm: avoid calling arch_enter/leave_lazy_mmu() in set_ptes 
commit eb61ad14c4 upstream.

With commit 1a10a44dfc ("sparc64: implement the new page table range
API") set_ptes was added to the sparc architecture.  The implementation
included calling arch_enter/leave_lazy_mmu() calls.

The patch removes the usage of arch_enter/leave_lazy_mmu() since this
implies nesting of lazy mmu regions which is not supported.  Without this
fix, lazy mmu mode is effectively disabled because we exit the mode after
the first set_ptes:

remap_pte_range()
  -> arch_enter_lazy_mmu()
  -> set_ptes()
      -> arch_enter_lazy_mmu()
      -> arch_leave_lazy_mmu()
  -> arch_leave_lazy_mmu()

Powerpc suffered the same problem and fixed it in a corresponding way with
commit 47b8def935 ("powerpc/mm: Avoid calling
arch_enter/leave_lazy_mmu() in set_ptes").

Link: https://lkml.kernel.org/r/20250303141542.3371656-5-ryan.roberts@arm.com
Fixes: 1a10a44dfc ("sparc64: implement the new page table range API")
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Andreas Larsson <andreas@gaisler.com>
Acked-by: Juergen Gross <jgross@suse.com>
Cc: Borislav Betkov <bp@alien8.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Juegren Gross <jgross@suse.com>
Cc: Matthew Wilcow (Oracle) <willy@infradead.org>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-04-25 10:45:30 +02:00
..
boot
configs arch/*/configs/*defconfig: Replace AUTOFS4_FS by AUTOFS_FS 2023-07-29 14:08:22 -07:00
crypto sparc: Explicitly include correct DT includes 2023-08-28 13:30:57 -05:00
include sparc/mm: avoid calling arch_enter/leave_lazy_mmu() in set_ptes 2025-04-25 10:45:30 +02:00
kernel syscalls: fix compat_sys_io_pgetevents_time64 usage 2024-07-05 09:34:04 +02:00
lib sparc32: fix a braino in fault handling in csum_and_copy_..._user() 2023-10-27 20:06:06 -04:00
math-emu
mm sparc/mm: disable preemption in lazy mmu mode 2025-04-25 10:45:30 +02:00
net Revert "bpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()" 2024-07-09 11:44:29 +02:00
power
prom sparc64: Fix incorrect function signature and add prototype for prom_cif_init 2024-08-03 08:53:55 +02:00
vdso kbuild: unify vdso_install rules 2024-06-12 11:12:32 +02:00
video sparc: Fix undefined reference to fb_is_primary_device 2024-03-01 13:35:00 +01:00
Kbuild
Kconfig Merge branch 'expand-stack' 2023-06-28 20:35:21 -07:00
Kconfig.debug watchdog/sparc64: define HARDLOCKUP_DETECTOR_SPARC64 2023-06-19 16:25:29 -07:00
Makefile kbuild: unify vdso_install rules 2024-06-12 11:12:32 +02:00