xen_send_IPI_mask_allbutself uses native vector as input other than xen_vector. xen_send_IPI_one need to be called to pass xen_vector in xen_send_IPI_mask_allbutself. Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> --- arch/x86/xen/smp.c | 11 ++++++----- 1 files changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 09ea61d..bf27868 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -565,6 +565,10 @@ void xen_send_IPI_mask_allbutself(const struct cpumask *mask, { unsigned cpu; unsigned int this_cpu = smp_processor_id(); + int xen_vector = xen_map_vector(vector); + + if (xen_vector < 0) + return; if (!(num_online_cpus() > 1)) return; @@ -573,16 +577,13 @@ void xen_send_IPI_mask_allbutself(const struct cpumask *mask, if (this_cpu == cpu) continue; - xen_smp_send_call_function_single_ipi(cpu); + xen_send_IPI_one(cpu, xen_vector); } } void xen_send_IPI_allbutself(int vector) { - int xen_vector = xen_map_vector(vector); - - if (xen_vector >= 0) - xen_send_IPI_mask_allbutself(cpu_online_mask, xen_vector); + xen_send_IPI_mask_allbutself(cpu_online_mask, vector); } static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id) -- 1.7.3
Konrad Rzeszutek Wilk
2013-Apr-09 19:20 UTC
Re: [PATCH] xen: minor fix in apic ipi interface func
On Tue, Apr 09, 2013 at 06:51:09PM +0800, Zhenzhong Duan wrote:> xen_send_IPI_mask_allbutself uses native vector as input other than xen_vector.Ouch. But it looks as the only user of the .send_IPI_mask_allbutself is just xen_send_IPI_allbutself? Or is there another user of this? Is there a particular bug that was found with this?> > xen_send_IPI_one need to be called to pass xen_vector in xen_send_IPI_mask_allbutself.Right, as we are using now ''xen_vector''.> > Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> > --- > arch/x86/xen/smp.c | 11 ++++++----- > 1 files changed, 6 insertions(+), 5 deletions(-) > > diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c > index 09ea61d..bf27868 100644 > --- a/arch/x86/xen/smp.c > +++ b/arch/x86/xen/smp.c > @@ -565,6 +565,10 @@ void xen_send_IPI_mask_allbutself(const struct cpumask *mask, > { > unsigned cpu; > unsigned int this_cpu = smp_processor_id(); > + int xen_vector = xen_map_vector(vector); > + > + if (xen_vector < 0) > + return; > > if (!(num_online_cpus() > 1)) > return; > @@ -573,16 +577,13 @@ void xen_send_IPI_mask_allbutself(const struct cpumask *mask, > if (this_cpu == cpu) > continue; > > - xen_smp_send_call_function_single_ipi(cpu); > + xen_send_IPI_one(cpu, xen_vector); > } > } > > void xen_send_IPI_allbutself(int vector) > { > - int xen_vector = xen_map_vector(vector); > - > - if (xen_vector >= 0) > - xen_send_IPI_mask_allbutself(cpu_online_mask, xen_vector); > + xen_send_IPI_mask_allbutself(cpu_online_mask, vector); > } > > static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id) > -- > 1.7.3 >
Zhenzhong Duan
2013-Apr-10 02:25 UTC
Re: [PATCH] xen: minor fix in apic ipi interface func
On 2013-04-10 03:20, Konrad Rzeszutek Wilk wrote:> On Tue, Apr 09, 2013 at 06:51:09PM +0800, Zhenzhong Duan wrote: >> xen_send_IPI_mask_allbutself uses native vector as input other than xen_vector. > Ouch. But it looks as the only user of the .send_IPI_mask_allbutself > is just xen_send_IPI_allbutself? Or is there another user of this?It looks __default_local_send_IPI_allbutself called apic->send_IPI_mask_allbutself. In set_xen_basic_apic_ops, apic->send_IPI_mask_allbutself = xen_send_IPI_mask_allbutself. apic->send_IPI_mask_allbutself use native vector as input like other funcs.> Is there a particular bug that was found with this?No, just looking at code and see the error. zduan