Re: [PATCH 03/12] KVM: x86: Add a common TSC scaling function

On 28/09/2015 07:38, Haozhong Zhang wrote: > > -static u64 __scale_tsc(u64 ratio, u64 tsc) > -{ > - u64 mult, frac, _tsc; > - > - mult = ratio >> 32; > - frac = ratio & ((1ULL << 32) - 1); > - > - _tsc = tsc; > - _tsc *= mult; > - _tsc += (tsc >> 32) * frac; > -

Re: [PATCH 03/12] KVM: x86: Add a common TSC scaling function

On Mon, Sep 28, 2015 at 10:12:37PM +0200, Paolo Bonzini wrote: > > > On 28/09/2015 07:38, Haozhong Zhang wrote: > > > > -static u64 __scale_tsc(u64 ratio, u64 tsc) > > -{ > > - u64 mult, frac, _tsc; > > - > > - mult = ratio >> 32; > > - frac = ratio & ((1ULL << 32) - 1); > > - > > -

[PATCH 03/12] KVM: x86: Add a common TSC scaling function

VMX and SVM calculate the TSC scaling ratio in a similar logic, so this patch generalizes it to a common TSC scaling function. Signed-off-by: Haozhong Zhang --- arch/x86/kvm/svm.c | 48 +++-- arch/x86/kvm/x86.c | 70