[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v5 RESEND 14/17] x86/VPMU: Save VPMU state for PV guests during context switch
> From: Boris Ostrovsky [mailto:boris.ostrovsky@xxxxxxxxxx] > Sent: Wednesday, April 23, 2014 8:51 PM > > Save VPMU state during context switch for both HVM and PV guests unless we > are in PMU privileged mode (i.e. dom0 is doing all profiling). > > Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx> > --- > xen/arch/x86/domain.c | 12 +++++------- > 1 file changed, 5 insertions(+), 7 deletions(-) > > diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c > index b389abc..87c3a02 100644 > --- a/xen/arch/x86/domain.c > +++ b/xen/arch/x86/domain.c > @@ -1461,16 +1461,14 @@ void context_switch(struct vcpu *prev, struct vcpu > *next) > } > > if ( prev != next ) > - _update_runstate_area(prev); > - > - if ( is_hvm_vcpu(prev) ) > { > - if ( (prev != next) && (vpmu_mode & XENPMU_MODE_ON) ) > + _update_runstate_area(prev); > + if ( vpmu_mode & XENPMU_MODE_ON ) > vpmu_save(prev); > + } > > - if ( !list_empty(&prev->arch.hvm_vcpu.tm_list) ) > + if ( is_hvm_vcpu(prev) > && !list_empty(&prev->arch.hvm_vcpu.tm_list) ) > pt_save_timer(prev); > - } > > local_irq_disable(); > > @@ -1508,7 +1506,7 @@ void context_switch(struct vcpu *prev, struct vcpu > *next) > (next->domain->domain_id != 0)); > } > > - if ( is_hvm_vcpu(next) && (prev != next) && (vpmu_mode & > XENPMU_MODE_ON) ) > + if ( (prev != next) && (vpmu_mode & XENPMU_MODE_ON) ) > /* Must be done with interrupts enabled */ > vpmu_load(next); > > -- > 1.8.3.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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