Messages in this thread | | | Date | Thu, 25 Apr 2019 19:11:11 +0200 (CEST) | From | Stefan Wahren <> | Subject | Re: [v8 09/10] arm64: add sysfs vulnerability show for speculative store bypass |
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> Jeremy Linton <jeremy.linton@arm.com> hat am 15. April 2019 um 23:21 geschrieben: > > > Return status based on ssbd_state and __ssb_safe. If the > mitigation is disabled, or the firmware isn't responding then > return the expected machine state based on a whitelist of known > good cores. > > Given a heterogeneous machine, the overall machine vulnerability > defaults to safe but is reset to unsafe when we miss the whitelist > and the firmware doesn't explicitly tell us the core is safe. > In order to make that work we delay transitioning to vulnerable > until we know the firmware isn't responding to avoid a case > where we miss the whitelist, but the firmware goes ahead and > reports the core is not vulnerable. If all the cores in the > machine have SSBS, then __ssb_safe will remain true. > > Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
on a Raspberry Pi 3 B
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