Re: Status of Intel Hybrid CPU support (Alder Lake/Raptor Lake) support

From: Konstantin Belousov <kostikbel_at_gmail.com>
Date: Mon, 14 Nov 2022 07:09:24 UTC 
On Mon, Nov 14, 2022 at 06:50:20AM +0000, Chen, Alvin W wrote:
> 
> 
> Internal Use - Confidential
> 
> 
> > -----Original Message-----
> > From: Mike Karels <mike@karels.net>
> > Sent: 2022年10月27日 23:17
> > To: Chen, Alvin W
> > Cc: freebsd-current
> > Subject: Re: Status of Intel Hybrid CPU support (Alder Lake/Raptor Lake)
> > support
> > 
> > 
> > [EXTERNAL EMAIL]
> > 
> > On 26 Oct 2022, at 22:29, Chen, Alvin W wrote:
> > 
> > > Any body know the status to support P Core and E Core?
> > > Now WA is: disable PCID.
> > 
> > Disabling vm.pmap.pcid_enabled is the best workaround for now.
> > There has been some progress in investigations in the background, but I don’t
> > think there is a permanent solution yet.
> > 
> > btw, I haven’t heard reports about Raptor Lake yet.  Do you know if it has the
> > same problems as Alder Lake on hybrids?  I would guess it does.
> > 
> 
> I get one RPL-S DVT, and it hasn't mode name yet as it is the engineering CPU intel provided for validation.
> Based on my testing, the issue is still there:
> 
> "Boot to shell by USB disk installer, and mount a FAT32 partition (on SSD), and copy a 300MB file to the FAT32, compare the sha256 checksums for the source file and the dst file, the checksum are different."

You might use this patch meantime
https://kib.kiev.ua/git/gitweb.cgi?p=deviant3.git;a=commit;h=5d72240a8777b26d5e0a7d2d26bb919d05f60002