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[Xen-devel] x86_32/entry.S question
| To: | Xen Developers <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-devel] x86_32/entry.S question |
| From: | Daniel Stodden <dns@xxxxxxxxxxxx> |
| Date: | Wed, 05 Dec 2007 14:51:22 +0100 |
| Delivery-date: | Thu, 06 Dec 2007 08:34:55 -0800 |
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Hi all.
cli # tests must not race interrupts
/*test_softirqs:*/
movl VCPU_processor(%ebx),%eax
shl $IRQSTAT_shift,%eax
test %ecx,irq_stat(%eax,1)
jnz process_softirqs
btr $_VCPUF_nmi_pending,VCPU_flags(%ebx) <<--- we are here
jc process_nmi
Taken from xen-3.0.2. The code may be outdated anyway, but doesn't the
btr lack a lock prefix on SMP?
regards,
daniel
--
dns@xxxxxxxxxxxx
Wire up your home and stay there.
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