Hi Anthony, Thanks for the patch.
asteinhau...@google.com writes: > From: Anthony Steinhauser <asteinhau...@google.com> > > PowerPC CPUs are vulnerable to L1TF to the same extent as to Meltdown. > It is also mitigated by flushing the L1D on privilege transition. > Currently the SYSFS gives a false negative on L1TF on CPUs that I verified > to be vulnerable. Can you include the details of which CPUs you tested? > https://www.ibm.com/blogs/psirt/potential-impact-processors-power-family/ > https://github.com/google/safeside/pull/52 > Signed-off-by: Anthony Steinhauser <asteinhau...@google.com> > --- I don't usually retain links in the change log, because they bit rot, so I'll drop those, but they will remain in the email archive. > diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c > index 7cfcb294b11c..a1a5017c5170 100644 > --- a/arch/powerpc/kernel/security.c > +++ b/arch/powerpc/kernel/security.c > @@ -135,7 +135,8 @@ void setup_spectre_v2(void) > #endif /* CONFIG_PPC_FSL_BOOK3E */ > > #ifdef CONFIG_PPC_BOOK3S_64 > -ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, > char *buf) > +static ssize_t cpu_show_delayed_fault_common( I guess that's an accurate name. I probably would have just had cpu_show_l1tf() call cpu_show_meltdown(), but I guess either approach is fine. cheers > @@ -167,6 +168,16 @@ ssize_t cpu_show_meltdown(struct device *dev, struct > device_attribute *attr, cha > > return sprintf(buf, "Vulnerable\n"); > } > + > +ssize_t cpu_show_l1tf(struct device *dev, struct device_attribute *attr, > char *buf) > +{ > + return cpu_show_delayed_fault_common(dev, attr, buf); > +} > + > +ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, > char *buf) > +{ > + return cpu_show_delayed_fault_common(dev, attr, buf); > +} > #endif > > ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute > *attr, char *buf) > -- > 2.24.0.rc0.303.g954a862665-goog
