>>> On 23.02.16 at 03:04, <haozhong.zh...@intel.com> wrote:
> Both VMX TSC scaling and SVM TSC ratio use the 64-bit TSC scaling ratio,
> but the number of fractional bits of the ratio is different between VMX
> and SVM. This patch adds the architecture code to collect the number of
> fractional bits and other related information into fields of struct
> hvm_function_table so that they can be used in the common code.
>
> Signed-off-by: Haozhong Zhang <haozhong.zh...@intel.com>
Reviewed-by: Jan Beulich <jbeul...@suse.com>
albeit I would have wished ...
> @@ -312,8 +311,8 @@ void hvm_set_guest_tsc_fixed(struct vcpu *v, u64
> guest_tsc, u64 at_tsc)
> else
> {
> tsc = at_tsc ?: rdtsc();
> - if ( cpu_has_tsc_ratio )
> - tsc = hvm_funcs.scale_tsc(v, tsc);
> + if ( hvm_tsc_scaling_supported )
> + tsc = hvm_funcs.tsc_scaling.scale_tsc(v, tsc);
... for these to get their redundancy reduced, .e.g
tsc = hvm_funcs.tsc_scaling.scale(v, tsc);
The R-b may be retained if you elect to make that adjustment.
Jan
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