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| author | Joerg Roedel <jroedel@suse.de> | 2018-08-07 12:24:29 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-08-07 18:51:22 +0200 |
| commit | 88c6f8a3977cc35997b47e2f99f080a15559c1eb (patch) | |
| tree | 9a18be7698a1d0932c06c972b78d977c49cb9614 /arch | |
| parent | Merge branch 'x86/pti-urgent' into x86/pti (diff) | |
| download | linux-88c6f8a3977cc35997b47e2f99f080a15559c1eb.tar.xz linux-88c6f8a3977cc35997b47e2f99f080a15559c1eb.zip | |
x86/mm/pti: Fix 32 bit PCID check
The check uses the wrong operator and causes false positive
warnings in the kernel log on some systems.
Fixes: 5e8105950a8b3 ('x86/mm/pti: Add Warning when booting on a PCID capable CPU')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: linux-mm@kvack.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David Laight <David.Laight@aculab.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: aliguori@amazon.com
Cc: daniel.gruss@iaik.tugraz.at
Cc: hughd@google.com
Cc: keescook@google.com
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Waiman Long <llong@redhat.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "David H . Gutteridge" <dhgutteridge@sympatico.ca>
Cc: joro@8bytes.org
Link: https://lkml.kernel.org/r/1533637471-30953-2-git-send-email-joro@8bytes.org
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/pti.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/pti.c b/arch/x86/mm/pti.c index ef8db6ffc836..113ba14a03d8 100644 --- a/arch/x86/mm/pti.c +++ b/arch/x86/mm/pti.c @@ -549,7 +549,7 @@ void __init pti_init(void) * supported on 32 bit anyway. To print the warning we need to * check with cpuid directly again. */ - if (cpuid_ecx(0x1) && BIT(17)) { + if (cpuid_ecx(0x1) & BIT(17)) { /* Use printk to work around pr_fmt() */ printk(KERN_WARNING "\n"); printk(KERN_WARNING "************************************************************\n"); |