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Re: [PATCH] x86/amd: extend CPU errata #1474 affected models
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 21 Dec 2023 09:50:07 +0100
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Wei Liu <wl@xxxxxxx>
- Delivery-date: Thu, 21 Dec 2023 08:50:15 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 20.12.2023 16:42, Andrew Cooper wrote:
> On 20/12/2023 3:10 pm, Roger Pau Monné wrote:
>> On Wed, Dec 20, 2023 at 02:46:43PM +0000, Andrew Cooper wrote:
>>> On 20/12/2023 2:22 pm, Roger Pau Monne wrote:
>>>> @@ -978,24 +978,24 @@ void amd_check_zenbleed(void)
>>>> val & chickenbit ? "chickenbit" : "microcode");
>>>> }
>>>>
>>>> -static void cf_check zen2_disable_c6(void *arg)
>>>> +static void cf_check zen_disable_c6(void *arg)
>>> fam17_disable_c6() ? I know Hygon is 0x18 but it's also reasonably well
>>> know to be the same uarch.
>>>
>>> This particular algorithm is good for all Fam17 uarches, irrespective of
>>> #1474, even if they happen to be the same set of CPUs in practice.
>> Yeah, I was about to use fam17h prefix, but that wouldn't cover Hygon.
>> I we are fine with it I can send an adjusted v2 using fam17h prefix.
>
> I think we're fine calling it fam17. Happy to do that consistently.
I agree. And it clearly cannot be just "zen", to avoid it also wrongly
covering Zen3 / Zen4.
Jan
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