On 12/04/2018 17:25, Vitaly Kuznetsov wrote: > @@ -5335,6 +5353,9 @@ static void __always_inline vmx_disable_intercept_for_msr(unsigned long *msr_bit > if (!cpu_has_vmx_msr_bitmap()) > return; > > + if (static_branch_unlikely(&enable_emsr_bitmap)) > + evmcs_touch_msr_bitmap(); > + > /* > * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals > * have the write-low and read-high bitmap offsets the wrong way round. > @@ -5370,6 +5391,9 @@ static void __always_inline vmx_enable_intercept_for_msr(unsigned long *msr_bitm > if (!cpu_has_vmx_msr_bitmap()) > return; > > + if (static_branch_unlikely(&enable_emsr_bitmap)) > + evmcs_touch_msr_bitmap(); I'm not sure about the "unlikely". Can you just check current_evmcs instead (dropping the static key completely)? The function, also, is small enough that inlining should be beneficial. Paolo
