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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-15 21:32:06 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-15 21:32:06 +0200 |
| commit | 19ca90de49c3269874722148edf07083182e23ec (patch) | |
| tree | 89e29a689bf7dda58cde50e24d7afc805f6d13b2 /arch/x86/include | |
| parent | Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kerne... (diff) | |
| parent | x86/mm: Fix bogus warning during EFI bootup, use boot_cpu_has() instead of th... (diff) | |
| download | linux-19ca90de49c3269874722148edf07083182e23ec.tar.xz linux-19ca90de49c3269874722148edf07083182e23ec.zip | |
Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 EFI bootup fixlet from Thomas Gleixner:
"A single fix for an early boot warning caused by invoking
this_cpu_has() before SMP initialization"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Fix bogus warning during EFI bootup, use boot_cpu_has() instead of this_cpu_has() in build_cr3_noflush()
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/tlbflush.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h index 84137c22fdfa..6690cd3fc8b1 100644 --- a/arch/x86/include/asm/tlbflush.h +++ b/arch/x86/include/asm/tlbflush.h @@ -131,7 +131,12 @@ static inline unsigned long build_cr3(pgd_t *pgd, u16 asid) static inline unsigned long build_cr3_noflush(pgd_t *pgd, u16 asid) { VM_WARN_ON_ONCE(asid > MAX_ASID_AVAILABLE); - VM_WARN_ON_ONCE(!this_cpu_has(X86_FEATURE_PCID)); + /* + * Use boot_cpu_has() instead of this_cpu_has() as this function + * might be called during early boot. This should work even after + * boot because all CPU's the have same capabilities: + */ + VM_WARN_ON_ONCE(!boot_cpu_has(X86_FEATURE_PCID)); return __sme_pa(pgd) | kern_pcid(asid) | CR3_NOFLUSH; } |