[Qemu-devel] [PATCH 0/5] i386: cpu: remove duplicate feature names

[Eduardo Habkost <ehabkost@redhat.com>]

The problem:

 - Some features are report at the same time on both CPUID[1].EDX and
   CPUID[8000_0001].EDX on AMD CPUs (e.g. fpu, tsc, msr, pae, mmx).
 - "-cpu <model>,+feature" should enable the bit only on CPUID[1] if
   it's not an AMD CPU, but it should enable the bit on both CPUID[1] and
   CPUID[8000_0001] if it's an AMD CPU.
 - The same should happen when implementing CPU properties: setting the
   property that enables a feature should set the duplicate CPUID[8000_0001].EDX
   bit only if CPU vendor is AMD.

Reference: http://article.gmane.org/gmane.comp.emulators.qemu/166024

The solution implemented by this series is:
 - On the CPU model table and while parsing CPU options/properties, set the bit
   only on CPUID[1] (the x86_def_t.features field).
 - When finishing initialization of the CPU cpuid fields, duplicate those
   feature bits on cpuid_ext2_features if and only if the CPU vendor is AMD.

This series depends on the "x86 CPU patches that didn't get into 1.2" series:
  http://article.gmane.org/gmane.comp.emulators.qemu/168633
  Message-Id: <1346877673-9136-1-git-send-email-ehabkost@redhat.com>


Eduardo Habkost (5):
  i386: kvm: bit 10 of CPUID[8000_0001].EDX is reserved
  i386: kvm: use a #define for the set of alias feature bits
  i386: cpu: replace EXT2_FEATURE_MASK with CPUID_EXT2_AMD_ALIASES
  i386: cpu: eliminate duplicate feature names
  i386: -cpu help: remove reference to specific CPUID leaves/registers

 target-i386/cpu.c | 59 +++++++++++++++++++++++++++++++++++--------------------
 target-i386/cpu.h | 12 +++++++++++
 target-i386/kvm.c |  2 +-
 3 files changed, 51 insertions(+), 22 deletions(-)

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1.7.11.4