On 17/12/19 22:32, Sean Christopherson wrote: > Small series to add build-time protections on reverse CPUID lookup (and > other usages of bit()), and to rename the misleading-generic bit() helper > to something that better conveys its purpose. > > I don't love emulator changes in patch 1 as adding one-off helpers is a > bit silly, but IMO it's the lesser of two evils, e.g. adding dedicated > helpers is arguably less error prone than manually encoding a CPUID > lookup, and the helpers approach avoids having to include cpuid.h in the > emulator code. > > v2: > - Rework the assertions to use the reverse_cpuid table instead of > using the last cpufeatures word (which was not at all intuitive). > > Sean Christopherson (5): > KVM: x86: Add dedicated emulator helpers for querying CPUID features > KVM: x86: Move bit() helper to cpuid.h > KVM: x86: Add CPUID_7_1_EAX to the reverse CPUID table > KVM: x86: Expand build-time assertion on reverse CPUID usage > KVM: x86: Refactor and rename bit() to feature_bit() macro > > arch/x86/include/asm/kvm_emulate.h | 4 +++ > arch/x86/kvm/cpuid.c | 5 ++-- > arch/x86/kvm/cpuid.h | 41 +++++++++++++++++++++++++---- > arch/x86/kvm/emulate.c | 21 +++------------ > arch/x86/kvm/svm.c | 4 +-- > arch/x86/kvm/vmx/vmx.c | 42 +++++++++++++++--------------- > arch/x86/kvm/x86.c | 18 +++++++++++++ > arch/x86/kvm/x86.h | 5 ---- > 8 files changed, 87 insertions(+), 53 deletions(-) > Queued, thanks. Paolo
