The patch titled Subject: selftests/mm: Update va_high_addr_switch.sh to check CPU for la57 flag has been added to the -mm mm-hotfixes-unstable branch. Its filename is selftests-mm-update-va_high_addr_switchsh-to-check-cpu-for-la57-flag.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Audra Mitchell audra@redhat.com Subject: selftests/mm: Update va_high_addr_switch.sh to check CPU for la57 flag Date: Fri, 19 Jan 2024 15:58:01 -0500

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.

Link: https://lkml.kernel.org/r/20240119205801.62769-1-audra@redhat.com Fixes: 4f2930c6718a ("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 ---

tools/testing/selftests/mm/va_high_addr_switch.sh | 6 ++++++ 1 file changed, 6 insertions(+)

--- a/tools/testing/selftests/mm/va_high_addr_switch.sh~selftests-mm-update-va_high_addr_switchsh-to-check-cpu-for-la57-flag +++ a/tools/testing/selftests/mm/va_high_addr_switch.sh @@ -29,9 +29,15 @@ check_supported_x86_64() # See man 1 gzip under '-f'. local pg_table_levels=$(gzip -dcfq "${config}" | grep PGTABLE_LEVELS | cut -d'=' -f 2)

+ local cpu_supports_pl5=$(awk '/^flags/ {if (/la57/) {print 0;} + else {print 1}; exit}' /proc/cpuinfo 2>/dev/null) + if [[ "${pg_table_levels}" -lt 5 ]]; then echo "$0: PGTABLE_LEVELS=${pg_table_levels}, must be >= 5 to run this test" exit $ksft_skip + elif [[ "${cpu_supports_pl5}" -ne 0 ]]; then + echo "$0: CPU does not have the necessary la57 flag to support page table level 5" + exit $ksft_skip fi }

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Patches currently in -mm which might be from audra@redhat.com are

selftests-mm-update-va_high_addr_switchsh-to-check-cpu-for-la57-flag.patch