On 5/3/2015 11:13 AM, Aravind Gopalakrishnan wrote:
On 5/1/15 7:42 PM, Aravind Gopalakrishnan wrote:
On 5/1/15 5:47 PM, Borislav Petkov wrote:
Aravind and I could probably test on a couple of AMD boxes to narrow
down.
@Aravind, see here:
https://lkml.kernel.org/r/87d69aab88c14d65ae1e7be55050d1b689b59b4b.1429402494.git.len.br...@intel.com
You could ask around whether a timeout is needed between the assertion
and deassertion of INIT done by the BSP when booting other cores.
Sure, I'll ask around and try mdelay(0) on some systems as well.
I can gather Fam15h, Fam16h but don't have K8's or older.
Will let you know how it goes.
Update:
Fam15h Model00h-0fh, Fam15hModel60h and Fam16h Model 00h-0fh
processors boot fine with mdelay(0) and BSP brings up all secondary
cpus correctly. I don't have Fam15hModel30h system currently up, but
I'll try that too tomorrow.
I am yet to get feedback from HW folks regarding this though.
Tested a delay of 0 on Fam10h and Fam15h Model 30h-3fh and both work fine.
Feedback from asking internally about this is that we should be OK to
move to a no-delay default from K8 onwards.
Thanks,
-Aravind.
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