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driver core: cpu: Unify redundant silly stubs

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Make them all a weak function, aliasing to a single function which
issues the "Not affected" string.

No functional changes.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: https://lore.kernel.org/r/20230809102700.29449-3-bp@alien8.de
This commit is contained in:
Borislav Petkov (AMD) 2023-07-29 17:20:33 +02:00
parent 182ac87070
commit 0fddfe3382
1 changed files with 18 additions and 67 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

85
drivers/base/cpu.c
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@ -509,79 +509,30 @@ static void __init cpu_dev_register_generic(void)
} }
#ifdef CONFIG_GENERIC_CPU_VULNERABILITIES #ifdef CONFIG_GENERIC_CPU_VULNERABILITIES
ssize_t cpu_show_not_affected(struct device *dev,
ssize_t __weak cpu_show_meltdown(struct device *dev,
struct device_attribute *attr, char *buf) struct device_attribute *attr, char *buf)
{ {
return sysfs_emit(buf, "Not affected\n"); return sysfs_emit(buf, "Not affected\n");
} }
ssize_t __weak cpu_show_spectre_v1(struct device *dev, #define CPU_SHOW_VULN_FALLBACK(func) \
struct device_attribute *attr, char *buf) ssize_t cpu_show_##func(struct device *, \
{ struct device_attribute *, char *) \
return sysfs_emit(buf, "Not affected\n"); __attribute__((weak, alias("cpu_show_not_affected")))
}
ssize_t __weak cpu_show_spectre_v2(struct device *dev, CPU_SHOW_VULN_FALLBACK(meltdown);
struct device_attribute *attr, char *buf) CPU_SHOW_VULN_FALLBACK(spectre_v1);
{ CPU_SHOW_VULN_FALLBACK(spectre_v2);
return sysfs_emit(buf, "Not affected\n"); CPU_SHOW_VULN_FALLBACK(spec_store_bypass);
} CPU_SHOW_VULN_FALLBACK(l1tf);
CPU_SHOW_VULN_FALLBACK(mds);
ssize_t __weak cpu_show_spec_store_bypass(struct device *dev, CPU_SHOW_VULN_FALLBACK(tsx_async_abort);
struct device_attribute *attr, char *buf) CPU_SHOW_VULN_FALLBACK(itlb_multihit);
{ CPU_SHOW_VULN_FALLBACK(srbds);
return sysfs_emit(buf, "Not affected\n"); CPU_SHOW_VULN_FALLBACK(mmio_stale_data);
} CPU_SHOW_VULN_FALLBACK(retbleed);
CPU_SHOW_VULN_FALLBACK(spec_rstack_overflow);
ssize_t __weak cpu_show_l1tf(struct device *dev, CPU_SHOW_VULN_FALLBACK(gather_data_sampling);
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_mds(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_tsx_async_abort(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_itlb_multihit(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_srbds(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_mmio_stale_data(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_retbleed(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_spec_rstack_overflow(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_gds(struct device *dev, ssize_t __weak cpu_show_gds(struct device *dev,
struct device_attribute *attr, char *buf) struct device_attribute *attr, char *buf)