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| author | Pawan Gupta <pawan.kumar.gupta@linux.intel.com> | 2025-08-14 10:20:42 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-11 17:19:15 +0200 |
| commit | 893387c18612bb452336a5881da0d015a7e8f4a2 (patch) | |
| tree | 2d8b1e791eeb35450d513695ee03919a9c8abd9a /drivers/base | |
| parent | 15006289e5c38b2a830e1fba221977a27598176c (diff) | |
| download | linux-893387c18612bb452336a5881da0d015a7e8f4a2.tar.gz linux-893387c18612bb452336a5881da0d015a7e8f4a2.tar.bz2 linux-893387c18612bb452336a5881da0d015a7e8f4a2.zip | |
x86/vmscape: Enable the mitigation
Commit 556c1ad666ad90c50ec8fccb930dd5046cfbecfb upstream.
Enable the previously added mitigation for VMscape. Add the cmdline
vmscape={off|ibpb|force} and sysfs reporting.
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/cpu.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index d68c60f35764..186bd680e741 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -606,6 +606,11 @@ ssize_t __weak cpu_show_tsa(struct device *dev, struct device_attribute *attr, c return sysfs_emit(buf, "Not affected\n"); } +ssize_t __weak cpu_show_vmscape(struct device *dev, struct device_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "Not affected\n"); +} + static DEVICE_ATTR(meltdown, 0444, cpu_show_meltdown, NULL); static DEVICE_ATTR(spectre_v1, 0444, cpu_show_spectre_v1, NULL); static DEVICE_ATTR(spectre_v2, 0444, cpu_show_spectre_v2, NULL); @@ -622,6 +627,7 @@ static DEVICE_ATTR(spec_rstack_overflow, 0444, cpu_show_spec_rstack_overflow, NU static DEVICE_ATTR(reg_file_data_sampling, 0444, cpu_show_reg_file_data_sampling, NULL); static DEVICE_ATTR(indirect_target_selection, 0444, cpu_show_indirect_target_selection, NULL); static DEVICE_ATTR(tsa, 0444, cpu_show_tsa, NULL); +static DEVICE_ATTR(vmscape, 0444, cpu_show_vmscape, NULL); static struct attribute *cpu_root_vulnerabilities_attrs[] = { &dev_attr_meltdown.attr, @@ -640,6 +646,7 @@ static struct attribute *cpu_root_vulnerabilities_attrs[] = { &dev_attr_reg_file_data_sampling.attr, &dev_attr_indirect_target_selection.attr, &dev_attr_tsa.attr, + &dev_attr_vmscape.attr, NULL }; |