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[PATCH v2 5/6] x86/irq: print nr_irqs as limit on the number of MSI(-X) interrupts
- To: xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Date: Thu, 30 Jun 2022 10:54:38 +0200
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- Cc: Roger Pau Monne <roger.pau@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Thu, 30 Jun 2022 08:56:41 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Using nr_irqs minus nr_irqs_gsi is misleading, as GSI interrupts are
not allocated unless requested by the hardware domain, so a hardware
domain could not use any GSI (or just one for the ACPI SCI), and hence
(almost) all nr_irqs will be available for MSI(-X) usage.
No functional difference, just affects the printed message.
Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
xen/arch/x86/irq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/arch/x86/irq.c b/xen/arch/x86/irq.c
index b64d18c450..7f75ec8bcc 100644
--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -434,7 +434,7 @@ int __init init_irq_data(void)
nr_irqs = 16;
printk(XENLOG_INFO "IRQ limits: %u GSI, %u MSI/MSI-X\n",
- nr_irqs_gsi, nr_irqs - nr_irqs_gsi);
+ nr_irqs_gsi, nr_irqs);
for ( vector = 0; vector < X86_NR_VECTORS; ++vector )
this_cpu(vector_irq)[vector] = INT_MIN;
--
2.36.1
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