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Open Source and information security mailing list archives
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Date: Mon, 14 Dec 2015 14:11:46 -0500 From: "Raj, Ashok" <ashok.raj@...el.com> To: Borislav Petkov <bp@...e.de> Cc: Eduardo Habkost <ehabkost@...hat.com>, kvm@...r.kernel.org, Tony Luck <tony.luck@...el.com>, Gong Chen <gong.chen@...el.com>, Gleb Natapov <gleb@...nel.org>, linux-kernel@...r.kernel.org, qemu-devel@...gnu.org, Andi Kleen <andi.kleen@...el.com>, Paolo Bonzini <pbonzini@...hat.com>, Ashok Raj <ashok.raj@...el.com> Subject: Re: [Qemu-devel] [Patch V2 1/2] x86, mce: Basic support to add LMCE support to QEMU On Mon, Dec 14, 2015 at 05:37:38PM +0100, Borislav Petkov wrote: > > ... and obviously LMCE is vendor-specific so it cannot be enabled on > !Intel guests with a define like that. mce_init() in qemu should check > vendor too. > > The same mistake was done with SER_P but that's much harder to change, > as we discussed previously. > This is mostly harmless.. since the MCG_CAP space is shared and has no conflict between vendors. Also just the CAP being set has no effect. The Guest OS needs to opt-in and the SIGBUS indicating SRAR are the only ones that are treated special treatment. Also Intel was the only one broadcasting MCE's.. so we are like the rest now :-) Cheers, Ashok -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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