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Audra Mitchell 8f02931edb selftests/mm: Update va_high_addr_switch.sh to check CPU for la57 flag 
commit 52e63d67b5 upstream.

In order for the page table level 5 to be in use, the CPU must have the
setting enabled in addition to the CONFIG option. Check for the flag to be
set to avoid false test failures on systems that do not have this cpu flag
set.

The test does a series of mmap calls including three using the
MAP_FIXED flag and specifying an address that is 1<<47 or 1<<48.  These
addresses are only available if you are using level 5 page tables,
which requires both the CPU to have the capabiltiy (la57 flag) and the
kernel to be configured.  Currently the test only checks for the kernel
configuration option, so this test can still report a false positive.
Here are the three failing lines:

$ ./va_high_addr_switch | grep FAILED
mmap(ADDR_SWITCH_HINT, 2 * PAGE_SIZE, MAP_FIXED): 0xffffffffffffffff - FAILED
mmap(HIGH_ADDR, MAP_FIXED): 0xffffffffffffffff - FAILED
mmap(ADDR_SWITCH_HINT, 2 * PAGE_SIZE, MAP_FIXED): 0xffffffffffffffff - FAILED

I thought (for about a second) refactoring the test so that these three
mmap calls will only be run on systems with the level 5 page tables
available, but the whole point of the test is to check the level 5
feature...

Link: https://lkml.kernel.org/r/20240119205801.62769-1-audra@redhat.com
Fixes: 4f2930c671 ("selftests/vm: only run 128TBswitch with 5-level paging")
Signed-off-by: Audra Mitchell <audra@redhat.com>
Cc: Rafael Aquini <raquini@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Adam Sindelar <adam@wowsignal.io>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-02-23 09:24:54 +01:00
arch scs: add CONFIG_MMU dependency for vfree_atomic() 2024-02-23 09:24:54 +01:00
block blk-iocost: Fix an UBSAN shift-out-of-bounds warning 2024-02-16 19:10:53 +01:00
certs
crypto crypto: api - Disallow identical driver names 2024-01-31 16:18:49 -08:00
Documentation net: sysfs: Fix /sys/class/net/<iface> path for statistics 2024-02-23 09:24:53 +01:00
drivers i40e: Fix waiting for queues of all VSIs to be disabled 2024-02-23 09:24:53 +01:00
fs btrfs: don't drop extent_map for free space inode on write error 2024-02-23 09:24:48 +01:00
include ptrace: Introduce exception_ip arch hook 2024-02-23 09:24:53 +01:00
init update workarounds for gcc "asm goto" issue 2024-02-23 09:24:47 +01:00
io_uring io_uring/net: limit inline multishot retries 2024-02-16 19:10:56 +01:00
ipc
kernel tracing/trigger: Fix to return error if failed to alloc snapshot 2024-02-23 09:24:54 +01:00
lib kunit: run test suites only after module initialization completes 2024-02-05 20:14:34 +00:00
LICENSES
mm mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again 2024-02-23 09:24:54 +01:00
net net: tls: fix returned read length with async decrypt 2024-02-23 09:24:52 +01:00
rust rust: upgrade to Rust 1.73.0 2024-02-16 19:10:43 +01:00
samples work around gcc bugs with 'asm goto' with outputs 2024-02-23 09:24:47 +01:00
scripts rust: upgrade to Rust 1.73.0 2024-02-16 19:10:43 +01:00
security lsm: new security_file_ioctl_compat() hook 2024-01-31 16:18:54 -08:00
sound ASoC: rt5645: Fix deadlock in rt5645_jack_detect_work() 2024-02-23 09:24:52 +01:00
tools selftests/mm: Update va_high_addr_switch.sh to check CPU for la57 flag 2024-02-23 09:24:54 +01:00
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MAINTAINERS MAINTAINERS: add Catherine as xfs maintainer for 6.6.y 2024-02-16 19:10:43 +01:00
Makefile Linux 6.6.17 2024-02-16 19:10:57 +01:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.