From: David Laight <David.Laight@ACULAB.COM>
To: 'Vitaly Kuznetsov' <vkuznets@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
"Sean Christopherson" <seanjc@google.com>
Cc: Jan Richter <jarichte@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH] KVM: selftests: x86: Avoid using SSE/AVX instructions
Date: Mon, 23 Sep 2024 11:16:34 +0000 [thread overview]
Message-ID: <2a62086810c14d0e88e38706a06aedde@AcuMS.aculab.com> (raw)
In-Reply-To: <20240920154422.2890096-1-vkuznets@redhat.com>
From: Vitaly Kuznetsov <vkuznets@redhat.com>
> Sent: 20 September 2024 16:44
>
> Some distros switched gcc to '-march=x86-64-v3' by default and while it's
> hard to find a CPU which doesn't support it today,
I didn't think that any of the Atom based cpu supported AVX.
I'm pretty sure one we use that are still in production as
server motherboards don't support it.
Doesn't -v3 also require support for the VEX encoding.
Which removes a lot of perfectly reasonable cpu?
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
next prev parent reply other threads:[~2024-09-23 11:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-20 15:44 [PATCH] KVM: selftests: x86: Avoid using SSE/AVX instructions Vitaly Kuznetsov
2024-09-22 16:17 ` Sean Christopherson
2024-09-23 11:16 ` David Laight [this message]
2024-09-24 12:04 ` Vitaly Kuznetsov
2024-10-21 18:32 ` Mark Brown
2024-10-21 20:33 ` Mark Brown
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