[PATCH] xen: arm: enable aborts on all physical processors.

[PATCH] xen: arm: enable aborts on all physical processors.

[Ian Campbell]

I'm not sure how this ended up in construct dom0 where it only affects the
boot cpu and doesn't logically fit.

Enable aborts at the same time as we enable interrupts.

I'm not sure what the behaviour of an "abort worthy" operation while aborts
are disable is, but it must surely be worse than calling do_unexpected_trap,
which is what happens from now on.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
---
 xen/arch/arm/domain_build.c |    2 --
 xen/arch/arm/setup.c        |    1 +
 xen/arch/arm/smpboot.c      |    1 +
 3 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 81a759c..1913f87 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -455,8 +455,6 @@ int construct_dom0(struct domain *d)
     }
 #endif
 
-    local_abort_enable();
-
     return 0;
 }
 
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index cfe3d94..9be1fc9 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -473,6 +473,7 @@ void __init start_xen(unsigned long boot_phys_offset,
     arch_init_memory();
 
     local_irq_enable();
+    local_abort_enable();
 
     smp_prepare_cpus(cpus);
 
diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c
index bd353c8..507936d 100644
--- a/xen/arch/arm/smpboot.c
+++ b/xen/arch/arm/smpboot.c
@@ -177,6 +177,7 @@ void __cpuinit start_secondary(unsigned long boot_phys_offset,
     wmb();
 
     local_irq_enable();
+    local_abort_enable();
 
     printk(XENLOG_DEBUG "CPU %u booted.\n", smp_processor_id());
 
-- 
1.7.2.5

Re: [PATCH] xen: arm: enable aborts on all physical processors.

[Ian Campbell]

(Very Belated) Ping?

On Thu, 2013-04-25 at 15:45 +0100, Ian Campbell wrote:
> I'm not sure how this ended up in construct dom0 where it only affects the
> boot cpu and doesn't logically fit.
> 
> Enable aborts at the same time as we enable interrupts.
> 
> I'm not sure what the behaviour of an "abort worthy" operation while aborts
> are disable is, but it must surely be worse than calling do_unexpected_trap,
> which is what happens from now on.
> 
> Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
> ---
>  xen/arch/arm/domain_build.c |    2 --
>  xen/arch/arm/setup.c        |    1 +
>  xen/arch/arm/smpboot.c      |    1 +
>  3 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index 81a759c..1913f87 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -455,8 +455,6 @@ int construct_dom0(struct domain *d)
>      }
>  #endif
>  
> -    local_abort_enable();
> -
>      return 0;
>  }
>  
> diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
> index cfe3d94..9be1fc9 100644
> --- a/xen/arch/arm/setup.c
> +++ b/xen/arch/arm/setup.c
> @@ -473,6 +473,7 @@ void __init start_xen(unsigned long boot_phys_offset,
>      arch_init_memory();
>  
>      local_irq_enable();
> +    local_abort_enable();
>  
>      smp_prepare_cpus(cpus);
>  
> diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c
> index bd353c8..507936d 100644
> --- a/xen/arch/arm/smpboot.c
> +++ b/xen/arch/arm/smpboot.c
> @@ -177,6 +177,7 @@ void __cpuinit start_secondary(unsigned long boot_phys_offset,
>      wmb();
>  
>      local_irq_enable();
> +    local_abort_enable();
>  
>      printk(XENLOG_DEBUG "CPU %u booted.\n", smp_processor_id());
>  

Re: [PATCH] xen: arm: enable aborts on all physical processors.

[Tim Deegan]

At 13:13 +0100 on 18 Jul (1374153205), Ian Campbell wrote:
> (Very Belated) Ping?
> 
> On Thu, 2013-04-25 at 15:45 +0100, Ian Campbell wrote:
> > I'm not sure how this ended up in construct dom0 where it only affects the
> > boot cpu and doesn't logically fit.
> > 
> > Enable aborts at the same time as we enable interrupts.
> > 
> > I'm not sure what the behaviour of an "abort worthy" operation while aborts
> > are disable is, but it must surely be worse than calling do_unexpected_trap,
> > which is what happens from now on.
> > 
> > Signed-off-by: Ian Campbell <ian.campbell@citrix.com>

Acked-by: Tim Deegan <tim@xen.org>

Re: [PATCH] xen: arm: enable aborts on all physical processors.

[Ian Campbell]

On Thu, 2013-07-18 at 18:01 +0100, Tim Deegan wrote:
> At 13:13 +0100 on 18 Jul (1374153205), Ian Campbell wrote:
> > (Very Belated) Ping?
> > 
> > On Thu, 2013-04-25 at 15:45 +0100, Ian Campbell wrote:
> > > I'm not sure how this ended up in construct dom0 where it only affects the
> > > boot cpu and doesn't logically fit.
> > > 
> > > Enable aborts at the same time as we enable interrupts.
> > > 
> > > I'm not sure what the behaviour of an "abort worthy" operation while aborts
> > > are disable is, but it must surely be worse than calling do_unexpected_trap,
> > > which is what happens from now on.
> > > 
> > > Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
> 
> Acked-by: Tim Deegan <tim@xen.org>

Thanks, applied.