From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 4 Dec 2014 14:11:11 +0000 (+0100)
Subject: KVM: cpuid: mask more bits in leaf 0xd and subleaves
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~40^2~13
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=404e0a19e155e2303a081109f3ae5e625ac8030a;p=pandora-kernel.git

KVM: cpuid: mask more bits in leaf 0xd and subleaves

- EAX=0Dh, ECX=1: output registers EBX/ECX/EDX are reserved.

- EAX=0Dh, ECX>1: output register ECX bit 0 is clear for all the CPUID
leaves we support, because variable "supported" comes from XCR0 and not
XSS.  Bits above 0 are reserved, so ECX is overall zero.  Output register
EDX is reserved.

Source: Intel Architecture Instruction Set Extensions Programming
Reference, ref. number 319433-022

Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Tested-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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