From: "Radim Krčmář" <rkrcmar@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
stable@vger.kernel.org, Yang Z Zhang <yang.z.zhang@intel.com>
Subject: Re: [PATCH v2] kvm: x86: zero EFER on INIT
Date: Mon, 19 Oct 2015 16:48:47 +0200 [thread overview]
Message-ID: <20151019144846.GA3396@potion.brq.redhat.com> (raw)
In-Reply-To: <1445247301-5150-1-git-send-email-pbonzini@redhat.com>
2015-10-19 11:35+0200, Paolo Bonzini:
> Not zeroing EFER means that a 32-bit firmware cannot enter paging mode
> without clearing EFER.LME first (which it should not know about).
> Yang Zhang from Intel confirmed that the manual is wrong and EFER is
> cleared to zero on INIT.
Also in APM v2, "Table 14-1. Initial Processor State.".
>
> Fixes: d28bc9dd25ce023270d2e039e7c98d38ecbf7758
> Cc: stable@vger.kernel.org
> Cc: Yang Z Zhang <yang.z.zhang@intel.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
prev parent reply other threads:[~2015-10-19 14:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-19 9:35 [PATCH v2] kvm: x86: zero EFER on INIT Paolo Bonzini
2015-10-19 14:48 ` Radim Krčmář [this message]
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