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[RFC PATCH 0/2] x86 CPU feature +/- fiddling and +kvm-no-defaults

From: David Edmondson
Subject: [RFC PATCH 0/2] x86 CPU feature +/- fiddling and +kvm-no-defaults
Date: Tue, 19 Jan 2021 14:22:05 +0000

Currently "-cpu -feature,+feature" will disable -feature, which seems
contrary to the intention of the user. Fix this such that the later
flag wins. There are no changes to the interaction of +/- and =on/=off.

Enabling KVM currently causes a default set of KVM features to be
enabled. Allow this default set to be defeated, requiring all features
to be explicitly enabled.

David Edmondson (1):
  hw/i386: -cpu model,-feature,+feature should enable feature

Joao Martins (1):
  target/i386: Add "-cpu +kvm-no-defaults"

 target/i386/cpu.c                   | 38 +++++++++++++++++++++++------
 target/i386/cpu.h                   |  3 +++
 tests/qtest/test-x86-cpuid-compat.c |  8 +++---
 3 files changed, 38 insertions(+), 11 deletions(-)


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