Merge tag 'alpha-for-v7.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/lindholm/alpha

Pull alpha updates from Magnus Lindholm:
"This completes Alpha's conversion to GENERIC_ENTRY and enabl

Merge tag 'alpha-for-v7.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/lindholm/alpha

Pull alpha updates from Magnus Lindholm:
"This 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"

* tag 'alpha-for-v7.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/lindholm/alpha: (57 commits)
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
...

show more ...

alpha: add bounded Clipper console-log scanning

Clipper console logs have an HWRPB byte count. Bound wrapper and child
traversal by that count before decoding embedded processor and system
logout fr

alpha: add bounded Clipper console-log scanning

Clipper console logs have an HWRPB byte count. Bound wrapper and child
traversal by that count before decoding embedded processor and system
logout frames. Print the wrapper name and event/halt timestamp, halt
code, and recorded CPU ID for processor packets.

Acknowledge the log only after a complete termination packet. Retain the
firmware pointer on unknown or incomplete wrappers and print at most
1 KiB of raw bytes using print_hex_dump(). This avoids the generic
scanner's unconditional acknowledgment after a parsing failure.

The ES40 record observed during testing is class 5, type 4. Its wrapper
layout is unknown and remains raw and unacknowledged; it may therefore
be printed again at each boot. Successful decoding of a nonempty hardware
log remains unverified. Keep console scanning independent of the live
machine-check and environmental handlers and restrict it to Clipper.

Console environmental payloads also remain raw: ES40 Service Guide
Table D-18's sys_offset conflicts with its field offsets. No register
layout is assumed for unverified extended subpacket types 6 and 7.

The scanner invokes the payload decoder directly during PCI init; no
generic subpacket-handler registration is needed. Mark its helpers
__init and retain the PCI init hook in sys_dp264.c.

Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>

show more ...

alpha: decode Clipper environmental events

Restrict ES40 live environmental decoding to Clipper. Validate frame bounds
and string-table masks, and separate fault bits from status context.
Report val

alpha: decode Clipper environmental events

Restrict ES40 live environmental decoding to Clipper. Validate frame bounds
and string-table masks, and separate fault bits from status context.
Report valid notifications even when no recognized fault bits are set,
so door-closed and supply-return notifications remain visible. A single
status snapshot does not establish a recovery transition.

Keep SMIR bit 0 and inverted halt/reset bits as raw context. During the
ES40 PSU cable test, bit 0 remained set after the individual PSU failure
indication cleared. Its polarity/latching is unverified, so do not call
it a current PSU failure. Use mask 0x14 for the remaining SMIR faults.
Decode only QW1 through QW7 as live environmental status, as documented
in the ES40 Service Guide, Tables D-20 and D-21.

Use plain door-status messages. Preserve unknown or truncated frames
in bounded raw dumps. Firmware console-log scanning is independent of
the live environmental handler.

Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>

show more ...

alpha: decode and acknowledge Tsunami system machine checks

Decode PCI and ECC transactions separately, honor invalid transaction
information, and select Pchip errors using the logout summary. Repor

alpha: decode and acknowledge Tsunami system machine checks

Decode PCI and ECC transactions separately, honor invalid transaction
information, and select Pchip errors using the logout summary. Report
master aborts without importing Titan-specific dismissal policy.
Delegate processor vectors to the bounded EV6 decoder.

On system vectors 660/620, capture live PERROR and MISC before
acknowledging their defined W1C bits and report live status absent from
the saved frame. Leave live chipset registers alone on CPU and
environmental vectors: HRM 10.2.5.6 warns that PERROR can have INV set
before the error reaches DRIR. Consuming that state from a CPU vector
could lose the transaction and its pending system-error notification.

Leave PERRMASK as configured by firmware. HRM 10.2.5.7 says a cleared
mask bit prevents the corresponding PERROR bit from being set, including
by PERRSET. Table 10-43 gives a reset value of zero, so this reporting
depends on firmware enabling the errors; changing masks does not
establish that previously latched state is cleared. Table 10-42 marks
PERROR bit 9 reserved (MBZ/RAZ); remove the obsolete RTO definition and
reserve its bitfield.

Use the system vector and frame bounds without restricting the reason
code to the ES40 values. Preserve invalid frames and unknown environmental
layouts in bounded raw dumps. Print CPU registers for uncorrectable system
errors, including the PC needed to diagnose NXM. Gate correctable system
register dumps on CONFIG_VERBOSE_MCHECK and alpha_verbose_mcheck while
retaining their error decode.

Keep transaction information unavailable whenever SERR is set, as
required by HRM 8.8.2.6. Table 10-42 selects ECC fields for CRE/UECC.
The first error freezes PERROR and only LOST can be set afterwards, so
mixed error bits were detected together.

The expected-probe path has no active Tsunami writer. Reporting and
acknowledgment do not establish recovery; panic policy remains separate.

Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>

show more ...

alpha: move Tsunami machine check handling to err_tsunami.c

Move the existing handler and PCI error clearing helpers without changing
their behavior. Build the error objects for ALPHA_TSUNAMI so tha

alpha: move Tsunami machine check handling to err_tsunami.c

Move the existing handler and PCI error clearing helpers without changing
their behavior. Build the error objects for ALPHA_TSUNAMI so that all
Tsunami configurations, including non-generic Shark, can use them.

Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>

show more ...