* [PATCH] x86: fix hvm_migrate_irq assertion
@ 2018-11-12 14:04 Wei Liu
2018-11-12 14:35 ` Jan Beulich
2018-11-12 14:52 ` Roger Pau Monné
0 siblings, 2 replies; 4+ messages in thread
From: Wei Liu @ 2018-11-12 14:04 UTC (permalink / raw)
To: xen-devel; +Cc: Andrew Cooper, Wei Liu, Jan Beulich, Roger Pau Monné
782cf8ba46 ("pass-through: adjust pIRQ migration") added an assertion
to hvm_migrate_irq.
PVH Dom0 is broken because it doesn't have dpci allocated. Add an
is_hardware_domain check to the assertion.
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
xen/arch/x86/hvm/hvm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 519282937b..5d263c4090 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -464,7 +464,8 @@ void hvm_migrate_timers(struct vcpu *v)
void hvm_migrate_pirq(struct hvm_pirq_dpci *pirq_dpci, const struct vcpu *v)
{
- ASSERT(iommu_enabled && hvm_domain_irq(v->domain)->dpci);
+ ASSERT(iommu_enabled &&
+ (is_hardware_domain(v->domain) || hvm_domain_irq(v->domain)->dpci));
if ( (pirq_dpci->flags & HVM_IRQ_DPCI_MACH_MSI) &&
/* Needn't migrate pirq if this pirq is delivered to guest directly.*/
--
2.11.0
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] x86: fix hvm_migrate_irq assertion
2018-11-12 14:04 [PATCH] x86: fix hvm_migrate_irq assertion Wei Liu
@ 2018-11-12 14:35 ` Jan Beulich
2018-11-12 15:13 ` Wei Liu
2018-11-12 14:52 ` Roger Pau Monné
1 sibling, 1 reply; 4+ messages in thread
From: Jan Beulich @ 2018-11-12 14:35 UTC (permalink / raw)
To: Wei Liu; +Cc: Andrew Cooper, xen-devel, Roger Pau Monne
>>> On 12.11.18 at 15:04, <wei.liu2@citrix.com> wrote:
> 782cf8ba46 ("pass-through: adjust pIRQ migration") added an assertion
> to hvm_migrate_irq.
>
> PVH Dom0 is broken because it doesn't have dpci allocated. Add an
> is_hardware_domain check to the assertion.
>
> Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
I'm sorry for the breakage.
Jan
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] x86: fix hvm_migrate_irq assertion
2018-11-12 14:04 [PATCH] x86: fix hvm_migrate_irq assertion Wei Liu
2018-11-12 14:35 ` Jan Beulich
@ 2018-11-12 14:52 ` Roger Pau Monné
1 sibling, 0 replies; 4+ messages in thread
From: Roger Pau Monné @ 2018-11-12 14:52 UTC (permalink / raw)
To: Wei Liu; +Cc: xen-devel, Jan Beulich, Andrew Cooper
On Mon, Nov 12, 2018 at 02:04:59PM +0000, Wei Liu wrote:
> 782cf8ba46 ("pass-through: adjust pIRQ migration") added an assertion
> to hvm_migrate_irq.
>
> PVH Dom0 is broken because it doesn't have dpci allocated. Add an
> is_hardware_domain check to the assertion.
>
> Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
> ---
> xen/arch/x86/hvm/hvm.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
> index 519282937b..5d263c4090 100644
> --- a/xen/arch/x86/hvm/hvm.c
> +++ b/xen/arch/x86/hvm/hvm.c
> @@ -464,7 +464,8 @@ void hvm_migrate_timers(struct vcpu *v)
>
> void hvm_migrate_pirq(struct hvm_pirq_dpci *pirq_dpci, const struct vcpu *v)
> {
> - ASSERT(iommu_enabled && hvm_domain_irq(v->domain)->dpci);
> + ASSERT(iommu_enabled &&
> + (is_hardware_domain(v->domain) || hvm_domain_irq(v->domain)->dpci));
Albeit I would just remove the hvm_domain_irq(v->domain)->dpci part of
the assert, AFAICT the function doesn't use it at all.
Thanks, Roger.
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] x86: fix hvm_migrate_irq assertion
2018-11-12 14:35 ` Jan Beulich
@ 2018-11-12 15:13 ` Wei Liu
0 siblings, 0 replies; 4+ messages in thread
From: Wei Liu @ 2018-11-12 15:13 UTC (permalink / raw)
To: Jan Beulich; +Cc: Andrew Cooper, Wei Liu, xen-devel, Roger Pau Monne
On Mon, Nov 12, 2018 at 07:35:57AM -0700, Jan Beulich wrote:
> >>> On 12.11.18 at 15:04, <wei.liu2@citrix.com> wrote:
> > 782cf8ba46 ("pass-through: adjust pIRQ migration") added an assertion
> > to hvm_migrate_irq.
> >
> > PVH Dom0 is broken because it doesn't have dpci allocated. Add an
> > is_hardware_domain check to the assertion.
> >
> > Signed-off-by: Wei Liu <wei.liu2@citrix.com>
>
> Reviewed-by: Jan Beulich <jbeulich@suse.com>
>
> I'm sorry for the breakage.
>
No worries. I should have noticed this while reviewing your patch, so I
don't blame you.
Wei.
> Jan
>
>
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2018-11-12 14:04 [PATCH] x86: fix hvm_migrate_irq assertion Wei Liu
2018-11-12 14:35 ` Jan Beulich
2018-11-12 15:13 ` Wei Liu
2018-11-12 14:52 ` Roger Pau Monné
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