powerpc/security/book3s64: Report L1TF status in sysfs
[ Upstream commit 8e6b6da91a
]
Some 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, a Power9 Talos II Boston 004e 1202, PowerNV
T2P9D01.
Signed-off-by: Anthony Steinhauser <asteinhauser@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
[mpe: Just have cpu_show_l1tf() call cpu_show_meltdown() directly]
Link: https://lore.kernel.org/r/20191029190759.84821-1-asteinhauser@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
parent
0090266e05
commit
f68c0f3294
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@ -168,6 +168,11 @@ ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, cha
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return sprintf(buf, "Vulnerable\n");
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}
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ssize_t cpu_show_l1tf(struct device *dev, struct device_attribute *attr, char *buf)
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{
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return cpu_show_meltdown(dev, attr, buf);
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}
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#endif
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ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, char *buf)
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