* [GIT PULL] alpha updates for v7.4
@ 2026-10-19 21:20 Magnus Lindholm
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From: Magnus Lindholm @ 2026-10-19 21:20 UTC (permalink / raw)
To: torvalds, linux-alpha, linux-kernel; +Cc: mattst88, richard.henderson, linmag7
Hi Linus,
This pull request completes Alpha's conversion to GENERIC_ENTRY and
enables a range of kernel features through Kconfig updates, including
UBSAN, gcov, kmemleak, page-table checking, fast GUP and sparse IRQs.
It includes TLB and MMU context fixes prompted by glibc test-suite
failures, HugeTLB support for 64KB, 512KB and 4MB pages, and fixes for
poisoned-page faults and page-table checking.
Machine-check handling is improved on Tsunami platforms, with bounded
EV6 logout decoding, Clipper environmental event reporting and safer
firmware console-log scanning.
Other changes add self-extracting compressed kernels with support for
all kernel compression formats, Alpha-specific XZ tuning, perf register
and user-stack sampling, and Alpha support in the seccomp selftests.
The series also fixes user stack-pointer reporting and IRQ entry
ordering, adds 128-bit shift helpers, cleans up linker sections, and
updates Kconfig help.
The following changes since commit cee9395acd8043be0644b25c34bfa86623f2b935:
Linux 7.3-rc1 (2026-08-30 13:34:40 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/lindholm/alpha.git tags/alpha-for-v7.4-tag
for you to fetch changes up to 71cf9644bcb35e686c3e12a703325335a0925946:
alpha: add bounded Clipper console-log scanning (2026-10-18 20:43:29 +0200)
----------------------------------------------------------------
alpha updates for v7.4
- alpha: add bounded Clipper console-log scanning
- alpha: decode Clipper environmental events
- alpha: decode and acknowledge Tsunami system machine checks
- alpha: bound EV6 logout decoding by the processor area
- alpha: describe the Tsunami system machine check frame
- alpha: move Tsunami machine check handling to err_tsunami.c
- alpha: fill in pc for software event samples
- alpha: add HAVE_PERF_REGS and HAVE_PERF_USER_STACK_DUMP support
- alpha: use user_stack_pointer() in KSTK_ESP() and dump_elf_thread()
- alpha: stop storing the user stack pointer in pt_regs
- alpha: fix stale user_stack_pointer()
- selftests/seccomp: add Alpha support to seccomp_bpf
- alpha: do not skip TLB shootdown IPIs for kthread-borrowed mms
- alpha: do not clear remote MMU contexts in migrate_flush_tlb_page()
- alpha: invalidate the local context in flush_icache_user_page()
- alpha: invalidate the local context in flush_tlb_mm()
- alpha: fix the local TLB invalidate in the UP flush_tlb_page()
- alpha: fix the local TLB invalidate in flush_tlb_page()
- alpha: invalidate the local context in flush_tlb_page()
- alpha: only use a targeted tbi() when the target mm is really current
- alpha: run check_mmu_context() from finish_arch_post_lock_switch()
- alpha: load the MMU context when switch_mm() switches the current task
- alpha: implement hugetlb support
- alpha: align hugetlb mappings in arch_get_unmapped_area()
- alpha: define granularity hint PTE bits
- alpha: describe the PTE read and write enable bits
- alpha: handle VM_FAULT_HWPOISON in do_page_fault()
- alpha: add missing page_table_check_pte_clear() to ptep_get_and_clear()
- alpha: default NR_CPUS to 32 for Wildfire
- alpha: link platform help text to the alphalinux.org wiki
- alpha: correct system descriptions in Kconfig help text
- alpha: replace dead links in Kconfig help text
- alpha: support the remaining kernel compression formats
- alpha: add self-extracting compressed kernel boot stub
- xz: add arch-specific tuning for alpha
- alpha: select SPARSE_IRQ
- alpha: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
- alpha: select ARCH_WANT_LD_ORPHAN_WARN
- alpha: discard .eh_frame and the relocation sections
- alpha: select SYSCTL_EXCEPTION_TRACE
- alpha: select ARCH_USE_MEMTEST
- alpha: select HAVE_GUP_FAST
- alpha: select ARCH_HAS_DEBUG_VM_PGTABLE
- alpha: add ARCH_SUPPORTS_PAGE_TABLE_CHECK support
- alpha: add ARCH_HAS_PTE_SPECIAL support
- alpha: add HAVE_ARCH_THREAD_STRUCT_WHITELIST support
- alpha: select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
- alpha: select HAVE_ARCH_COMPILER_H
- alpha: select ARCH_SUPPORTS_INT128
- alpha: select ARCH_HAS_FAST_MULTIPLIER
- alpha: select ARCH_SUPPORTS_ATOMIC_RMW
- alpha: select EDAC_SUPPORT
- alpha: select HAVE_DEBUG_KMEMLEAK
- alpha: select ARCH_HAS_GCOV_PROFILE_ALL
- alpha: select ARCH_HAS_UBSAN
- alpha: enter hardirq context before looking up the irq descriptor
- alpha: enable GENERIC_ENTRY
----------------------------------------------------------------
Magnus Lindholm (18):
alpha: enable GENERIC_ENTRY
alpha: load the MMU context when switch_mm() switches the current task
alpha: run check_mmu_context() from finish_arch_post_lock_switch()
alpha: only use a targeted tbi() when the target mm is really current
alpha: invalidate the local context in flush_tlb_page()
alpha: fix the local TLB invalidate in flush_tlb_page()
alpha: fix the local TLB invalidate in the UP flush_tlb_page()
alpha: invalidate the local context in flush_tlb_mm()
alpha: invalidate the local context in flush_icache_user_page()
alpha: do not clear remote MMU contexts in migrate_flush_tlb_page()
alpha: do not skip TLB shootdown IPIs for kthread-borrowed mms
selftests/seccomp: add Alpha support to seccomp_bpf
alpha: move Tsunami machine check handling to err_tsunami.c
alpha: describe the Tsunami system machine check frame
alpha: bound EV6 logout decoding by the processor area
alpha: decode and acknowledge Tsunami system machine checks
alpha: decode Clipper environmental events
alpha: add bounded Clipper console-log scanning
Matt Turner (39):
alpha: enter hardirq context before looking up the irq descriptor
alpha: select ARCH_HAS_UBSAN
alpha: select ARCH_HAS_GCOV_PROFILE_ALL
alpha: select HAVE_DEBUG_KMEMLEAK
alpha: select EDAC_SUPPORT
alpha: select ARCH_SUPPORTS_ATOMIC_RMW
alpha: select ARCH_HAS_FAST_MULTIPLIER
alpha: select ARCH_SUPPORTS_INT128
alpha: select HAVE_ARCH_COMPILER_H
alpha: select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
alpha: add HAVE_ARCH_THREAD_STRUCT_WHITELIST support
alpha: add ARCH_HAS_PTE_SPECIAL support
alpha: add ARCH_SUPPORTS_PAGE_TABLE_CHECK support
alpha: select ARCH_HAS_DEBUG_VM_PGTABLE
alpha: select HAVE_GUP_FAST
alpha: select ARCH_USE_MEMTEST
alpha: select SYSCTL_EXCEPTION_TRACE
alpha: discard .eh_frame and the relocation sections
alpha: select ARCH_WANT_LD_ORPHAN_WARN
alpha: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
alpha: select SPARSE_IRQ
xz: add arch-specific tuning for alpha
alpha: add self-extracting compressed kernel boot stub
alpha: support the remaining kernel compression formats
alpha: replace dead links in Kconfig help text
alpha: correct system descriptions in Kconfig help text
alpha: link platform help text to the alphalinux.org wiki
alpha: default NR_CPUS to 32 for Wildfire
alpha: add missing page_table_check_pte_clear() to ptep_get_and_clear()
alpha: handle VM_FAULT_HWPOISON in do_page_fault()
alpha: describe the PTE read and write enable bits
alpha: define granularity hint PTE bits
alpha: align hugetlb mappings in arch_get_unmapped_area()
alpha: implement hugetlb support
alpha: fix stale user_stack_pointer()
alpha: stop storing the user stack pointer in pt_regs
alpha: use user_stack_pointer() in KSTK_ESP() and dump_elf_thread()
alpha: add HAVE_PERF_REGS and HAVE_PERF_USER_STACK_DUMP support
alpha: fill in pc for software event samples
Documentation/admin-guide/kernel-parameters.txt | 2 +-
.../debug/debug-vm-pgtable/arch-support.txt | 2 +-
.../debug/gcov-profile-all/arch-support.txt | 2 +-
.../features/debug/kmemleak/arch-support.txt | 2 +-
.../features/perf/perf-regs/arch-support.txt | 2 +-
.../features/perf/perf-stackdump/arch-support.txt | 2 +-
.../features/vm/pte_special/arch-support.txt | 2 +-
arch/alpha/Kconfig | 185 ++++--
arch/alpha/Makefile | 6 +-
arch/alpha/boot/.gitignore | 2 +
arch/alpha/boot/Makefile | 16 +-
arch/alpha/boot/compressed/.gitignore | 3 +
arch/alpha/boot/compressed/Makefile | 89 +++
arch/alpha/boot/compressed/head.S | 36 ++
arch/alpha/boot/compressed/misc.c | 209 +++++++
arch/alpha/boot/compressed/trampoline.S | 46 ++
arch/alpha/boot/compressed/vmlinux.lds.S | 83 +++
arch/alpha/boot/compressed/vmlinux.scr | 10 +
arch/alpha/include/asm/asm-prototypes.h | 6 +
arch/alpha/include/asm/core_tsunami.h | 8 +-
arch/alpha/include/asm/entry-common.h | 14 +
arch/alpha/include/asm/ftrace.h | 5 +-
arch/alpha/include/asm/hugetlb.h | 43 ++
arch/alpha/include/asm/mmu_context.h | 35 +-
arch/alpha/include/asm/page.h | 13 +
arch/alpha/include/asm/perf_event.h | 7 +
arch/alpha/include/asm/pgtable.h | 83 ++-
arch/alpha/include/asm/processor.h | 10 +-
arch/alpha/include/asm/ptrace.h | 17 +-
arch/alpha/include/asm/stacktrace.h | 20 +
arch/alpha/include/asm/switch_to.h | 1 -
arch/alpha/include/asm/syscall.h | 11 +-
arch/alpha/include/asm/thread_info.h | 30 +-
arch/alpha/include/asm/tlbflush.h | 3 +-
arch/alpha/include/uapi/asm/perf_regs.h | 45 ++
arch/alpha/include/uapi/asm/ptrace.h | 2 +-
arch/alpha/kernel/Makefile | 5 +-
arch/alpha/kernel/asm-offsets.c | 6 +-
arch/alpha/kernel/core_tsunami.c | 34 -
arch/alpha/kernel/entry.S | 323 +++-------
arch/alpha/kernel/err_common.c | 13 +
arch/alpha/kernel/err_ev6.c | 38 +-
arch/alpha/kernel/err_impl.h | 1 +
arch/alpha/kernel/err_tsunami.c | 688 +++++++++++++++++++++
arch/alpha/kernel/irq.c | 9 +-
arch/alpha/kernel/irq_alpha.c | 27 +-
arch/alpha/kernel/osf_sys.c | 14 +-
arch/alpha/kernel/perf_regs.c | 64 ++
arch/alpha/kernel/process.c | 2 +-
arch/alpha/kernel/proto.h | 11 +-
arch/alpha/kernel/ptrace.c | 142 ++---
arch/alpha/kernel/signal.c | 164 ++++-
arch/alpha/kernel/smp.c | 67 +-
arch/alpha/kernel/sys_dp264.c | 3 +-
arch/alpha/kernel/traps.c | 8 -
arch/alpha/kernel/vmlinux.lds.S | 11 +
arch/alpha/lib/Makefile | 2 +
arch/alpha/lib/tishift.c | 70 +++
arch/alpha/mm/Makefile | 2 +
arch/alpha/mm/fault.c | 52 +-
arch/alpha/mm/hugetlbpage.c | 308 +++++++++
arch/alpha/mm/init.c | 5 +
arch/alpha/mm/tlbflush.c | 18 +-
scripts/xz_wrap.sh | 5 +
tools/testing/selftests/seccomp/seccomp_bpf.c | 26 +
65 files changed, 2610 insertions(+), 560 deletions(-)
create mode 100644 arch/alpha/boot/.gitignore
create mode 100644 arch/alpha/boot/compressed/.gitignore
create mode 100644 arch/alpha/boot/compressed/Makefile
create mode 100644 arch/alpha/boot/compressed/head.S
create mode 100644 arch/alpha/boot/compressed/misc.c
create mode 100644 arch/alpha/boot/compressed/trampoline.S
create mode 100644 arch/alpha/boot/compressed/vmlinux.lds.S
create mode 100644 arch/alpha/boot/compressed/vmlinux.scr
create mode 100644 arch/alpha/include/asm/entry-common.h
create mode 100644 arch/alpha/include/asm/hugetlb.h
create mode 100644 arch/alpha/include/asm/stacktrace.h
create mode 100644 arch/alpha/include/uapi/asm/perf_regs.h
create mode 100644 arch/alpha/kernel/err_tsunami.c
create mode 100644 arch/alpha/kernel/perf_regs.c
create mode 100644 arch/alpha/lib/tishift.c
create mode 100644 arch/alpha/mm/hugetlbpage.c
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