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authorThomas Gleixner <tglx@linutronix.de>2018-01-07 22:48:00 +0100
committerThomas Gleixner <tglx@linutronix.de>2018-01-08 11:10:33 +0100
commit87590ce6e373d1a5401f6539f0c59ef92dd924a9 (patch)
treeb3d5c8ca8fe62571842c3461956da2183957a61c /include/linux
parent99c6fa2511d8a683e61468be91b83f85452115fa (diff)
download96b-common-87590ce6e373d1a5401f6539f0c59ef92dd924a9.tar.gz
sysfs/cpu: Add vulnerability folder
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
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/cpu.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 938ea8ae0ba4..c816e6f2730c 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -47,6 +47,13 @@ extern void cpu_remove_dev_attr(struct device_attribute *attr);
extern int cpu_add_dev_attr_group(struct attribute_group *attrs);
extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);
+extern ssize_t cpu_show_meltdown(struct device *dev,
+ struct device_attribute *attr, char *buf);
+extern ssize_t cpu_show_spectre_v1(struct device *dev,
+ struct device_attribute *attr, char *buf);
+extern ssize_t cpu_show_spectre_v2(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
extern __printf(4, 5)
struct device *cpu_device_create(struct device *parent, void *drvdata,
const struct attribute_group **groups,