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Foreshadow for PowerPC. #52
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mmdriley
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Oct 21, 2019
fengguang
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Oct 26, 2019
L1TF affects PowerPC of the same range as Meltdown-US. I tested it personally: google/safeside#52 and it is also admitted in the IBM report: https://www.ibm.com/blogs/psirt/potential-impact-processors-power-family/ Similarly to Meltdown it is effectively mitigated by the rfi_flush. Signed-off-by: Anthony Steinhauser <asteinhauser@google.com>
ruscur
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Oct 29, 2019
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. https://www.ibm.com/blogs/psirt/potential-impact-processors-power-family/ google/safeside#52 Signed-off-by: Anthony Steinhauser <asteinhauser@google.com>
fengguang
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Oct 31, 2019
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. https://www.ibm.com/blogs/psirt/potential-impact-processors-power-family/ google/safeside#52 Signed-off-by: Anthony Steinhauser <asteinhauser@google.com>
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Tested on Power9 with L-1D flushing on privilege level transition turned off.