diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2018-01-07 22:48:00 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2018-03-19 18:58:29 +0000 |
| commit | 9a9c5c58486e515f2f42849e57f6a6c7f94ed997 (patch) | |
| tree | a3c09fab20db14af7cfb0360b9218737ee0cab79 /include/linux | |
| parent | 531cde622c2c2530ae50c2ef0670da55f1b914cb (diff) | |
sysfs/cpu: Add vulnerability folder
commit 87590ce6e373d1a5401f6539f0c59ef92dd924a9 upstream.
As the meltdown/spectre problem affects several CPU architectures, it makes
sense to have common way to express whether a system is affected by a
particular vulnerability or not. If affected the way to express the
mitigation should be common as well.
Create /sys/devices/system/cpu/vulnerabilities folder and files for
meltdown, spectre_v1 and spectre_v2.
Allow architectures to override the show function.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linuxfoundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Link: https://lkml.kernel.org/r/20180107214913.096657732@linutronix.de
[bwh: Backported to 3.2: CPU device class is a sysdev_class, not a normal device
class]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/cpu.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 21b1e9789a80..4583d615e90c 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -36,6 +36,13 @@ extern void cpu_remove_sysdev_attr_group(struct attribute_group *attrs); extern int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls); +ssize_t cpu_show_meltdown(struct sysdev_class *class, + struct sysdev_class_attribute *attr, char *buf); +ssize_t cpu_show_spectre_v1(struct sysdev_class *class, + struct sysdev_class_attribute *attr, char *buf); +ssize_t cpu_show_spectre_v2(struct sysdev_class *class, + struct sysdev_class_attribute *attr, char *buf); + #ifdef CONFIG_HOTPLUG_CPU extern void unregister_cpu(struct cpu *cpu); extern ssize_t arch_cpu_probe(const char *, size_t); |