From: Julien Grall <julien.grall@linaro.org>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
xen-devel@lists.xensource.com
Cc: julien.grall@citrix.com, Ian.Campbell@citrix.com
Subject: Re: [PATCH-4.5 v2 10/10] xen/arm: print more info in gic_dump_info, keep gic_lr sync'ed
Date: Sun, 16 Feb 2014 20:31:01 +0000 [thread overview]
Message-ID: <53012005.4020406@linaro.org> (raw)
In-Reply-To: <1392393098-7351-10-git-send-email-stefano.stabellini@eu.citrix.com>
Hi Stefano,
On 14/02/14 15:51, Stefano Stabellini wrote:
> @@ -986,6 +991,8 @@ void gic_dump_info(struct vcpu *v)
> struct pending_irq *p;
>
> printk("GICH_LRs (vcpu %d) mask=%"PRIx64"\n", v->vcpu_id, v->arch.lr_mask);
> +
> + spin_lock(&v->arch.vgic.lock);
interrupts need to be disabled here. If not, it's possible to receive an
interrupt while the lock is taken. Xen might deadlock if the interrupt
is inject to this vcpu "v" (see vgic_vcpu_inject_irq).
Regards,
--
Julien Grall
next prev parent reply other threads:[~2014-02-16 20:31 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-14 15:50 [PATCH-4.5 v2 0/10] remove maintenance interrupts Stefano Stabellini
2014-02-14 15:51 ` [PATCH-4.5 v2 01/10] xen/arm: remove unused virtual parameter from vgic_vcpu_inject_irq Stefano Stabellini
2014-03-18 15:58 ` Ian Campbell
2014-02-14 15:51 ` [PATCH-4.5 v2 02/10] xen/arm: support HW interrupts in gic_set_lr Stefano Stabellini
2014-02-14 17:49 ` Julien Grall
2014-03-18 16:01 ` Ian Campbell
2014-03-18 17:38 ` Stefano Stabellini
2014-03-18 17:47 ` Ian Campbell
2014-02-14 15:51 ` [PATCH-4.5 v2 03/10] xen/arm: do not request maintenance_interrupts Stefano Stabellini
2014-02-14 15:51 ` [PATCH-4.5 v2 04/10] xen/arm: set GICH_HCR_UIE if all the LRs are in use Stefano Stabellini
2014-02-14 15:51 ` [PATCH-4.5 v2 05/10] xen/arm: keep track of the GICH_LR used for the irq in struct pending_irq Stefano Stabellini
2014-02-14 15:51 ` [PATCH-4.5 v2 06/10] xen/arm: second irq injection while the first irq is still inflight Stefano Stabellini
2014-02-14 15:51 ` [PATCH-4.5 v2 07/10] xen/arm: don't protect GICH and lr_queue accesses with gic.lock Stefano Stabellini
2014-02-14 17:37 ` Julien Grall
2014-02-14 15:51 ` [PATCH-4.5 v2 08/10] xen/arm: avoid taking unconditionally the vgic.lock in gic_clear_lrs Stefano Stabellini
2014-02-14 15:51 ` [PATCH-4.5 v2 09/10] xen/arm: use GICH_ELSR[01] to avoid reading all the GICH_LRs " Stefano Stabellini
2014-02-14 15:51 ` [PATCH-4.5 v2 10/10] xen/arm: print more info in gic_dump_info, keep gic_lr sync'ed Stefano Stabellini
2014-02-16 20:31 ` Julien Grall [this message]
2014-02-16 20:23 ` [PATCH-4.5 v2 0/10] remove maintenance interrupts Julien Grall
2014-03-18 16:02 ` Ian Campbell
2014-03-18 16:10 ` Ian Campbell
2014-03-18 17:26 ` Stefano Stabellini
2014-03-18 17:25 ` Stefano Stabellini
2014-02-18 16:29 ` Ian Campbell
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