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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-12-02 08:48:59 +0900 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-12-02 08:48:59 +0900 |
| commit | 35f84584806e4e127a667221c592f8ae248132f6 (patch) | |
| tree | 5fabb6849edbacd9387fc9824831eec576d96e44 | |
| parent | 1a2b4185669b6318cf75ec18d13fa5f8779ac073 (diff) | |
| parent | f5259997f3e8d6edfcc2daf5b2c0b34f074d7bc0 (diff) | |
| download | linux-xfs-35f84584806e4e127a667221c592f8ae248132f6.tar.gz | |
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fix from Catalin Marinas:
"Fix a regression where the arm64 KPTI ends up enabled even on systems
that don't need it"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Avoid enabling KPTI unnecessarily
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 646591c67e7a5..91d2d67149691 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1839,6 +1839,10 @@ static int __init __kpti_install_ng_mappings(void *__unused) static void __init kpti_install_ng_mappings(void) { + /* Check whether KPTI is going to be used */ + if (!cpus_have_cap(ARM64_UNMAP_KERNEL_AT_EL0)) + return; + /* * We don't need to rewrite the page-tables if either we've done * it already or we have KASLR enabled and therefore have not |