* Spectre and Cortex-A8/A9
@ 2018-05-09 18:21 ` Adam Ford
0 siblings, 0 replies; 4+ messages in thread
From: Adam Ford @ 2018-05-09 18:21 UTC (permalink / raw)
To: arm-soc, linux-omap
There is a lot of information pushed around the web about the Spectre
bug. I went to ARM's support site and there are some patches
available from February that haven't made their way into the mainline.
Sorry if this has been covered before, but I am curious to know if
there is a good place or method to determine whether or not the
Cortex-A8 and A9 are still vulnerable and which versions or 4.4, 4.9,
or 4.14 have any items fixed.
Thanks for your patience. :-)
adam
^ permalink raw reply [flat|nested] 4+ messages in thread
* Spectre and Cortex-A8/A9
@ 2018-05-09 18:21 ` Adam Ford
0 siblings, 0 replies; 4+ messages in thread
From: Adam Ford @ 2018-05-09 18:21 UTC (permalink / raw)
To: linux-arm-kernel
There is a lot of information pushed around the web about the Spectre
bug. I went to ARM's support site and there are some patches
available from February that haven't made their way into the mainline.
Sorry if this has been covered before, but I am curious to know if
there is a good place or method to determine whether or not the
Cortex-A8 and A9 are still vulnerable and which versions or 4.4, 4.9,
or 4.14 have any items fixed.
Thanks for your patience. :-)
adam
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Spectre and Cortex-A8/A9
2018-05-09 18:21 ` Adam Ford
@ 2018-05-10 14:47 ` Tony Lindgren
-1 siblings, 0 replies; 4+ messages in thread
From: Tony Lindgren @ 2018-05-10 14:47 UTC (permalink / raw)
To: Adam Ford; +Cc: linux-omap, arm-soc
* Adam Ford <aford173@gmail.com> [180509 18:23]:
> There is a lot of information pushed around the web about the Spectre
> bug. I went to ARM's support site and there are some patches
> available from February that haven't made their way into the mainline.
>
> Sorry if this has been covered before, but I am curious to know if
> there is a good place or method to determine whether or not the
> Cortex-A8 and A9 are still vulnerable and which versions or 4.4, 4.9,
> or 4.14 have any items fixed.
Well while we're waiting to figure out what all needs to be fixed,
here's what I'd do meanwhile:
1. Make sure the bootloader sets IBE bit
2. Make sure you have CONFIG_ARM_ERRATA_430973=y
3. Apply Marc Zyngier's patches from thread "[PATCH v4 0/6] 32bit ARM
branch predictor hardening", but note that these are still being
discussed
4. Update kernel when patches that have been validated against
test cases get merged
Regards,
Tony
^ permalink raw reply [flat|nested] 4+ messages in thread
* Spectre and Cortex-A8/A9
@ 2018-05-10 14:47 ` Tony Lindgren
0 siblings, 0 replies; 4+ messages in thread
From: Tony Lindgren @ 2018-05-10 14:47 UTC (permalink / raw)
To: linux-arm-kernel
* Adam Ford <aford173@gmail.com> [180509 18:23]:
> There is a lot of information pushed around the web about the Spectre
> bug. I went to ARM's support site and there are some patches
> available from February that haven't made their way into the mainline.
>
> Sorry if this has been covered before, but I am curious to know if
> there is a good place or method to determine whether or not the
> Cortex-A8 and A9 are still vulnerable and which versions or 4.4, 4.9,
> or 4.14 have any items fixed.
Well while we're waiting to figure out what all needs to be fixed,
here's what I'd do meanwhile:
1. Make sure the bootloader sets IBE bit
2. Make sure you have CONFIG_ARM_ERRATA_430973=y
3. Apply Marc Zyngier's patches from thread "[PATCH v4 0/6] 32bit ARM
branch predictor hardening", but note that these are still being
discussed
4. Update kernel when patches that have been validated against
test cases get merged
Regards,
Tony
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2018-05-10 14:47 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2018-05-09 18:21 Spectre and Cortex-A8/A9 Adam Ford
2018-05-09 18:21 ` Adam Ford
2018-05-10 14:47 ` Tony Lindgren
2018-05-10 14:47 ` Tony Lindgren
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