linux-kernel - [PATCH v7 08/24] iommu/vt-d: Set the IRTE delivery mode individually for each interrupt

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Date:   Wed,  1 Mar 2023 15:47:37 -0800
From:   Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To:     Tony Luck <tony.luck@...el.com>,
        Dave Hansen <dave.hansen@...el.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Len Brown <len.brown@...el.com>
Cc:     Andi Kleen <ak@...ux.intel.com>,
        Stephane Eranian <eranian@...gle.com>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Ricardo Neri <ricardo.neri@...el.com>,
        linuxppc-dev@...ts.ozlabs.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org,
        Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v7 08/24] iommu/vt-d: Set the IRTE delivery mode individually for each interrupt

Use the mode specified in the provided interrupt hardware configuration
data to set the delivery mode.

Since most interrupts are configured to use the delivery mode of the APIC
driver, there are no functional changes. The only exception are interrupts
that do specify a different delivery mode.

Cc: Andi Kleen <ak@...ux.intel.com>
Cc: David Woodhouse <dwmw2@...radead.org>
Cc: "Ravi V. Shankar" <ravi.v.shankar@...el.com>
Cc: Lu Baolu <baolu.lu@...ux.intel.com>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: iommu@...ts.linux-foundation.org
Cc: linuxppc-dev@...ts.ozlabs.org
Reviewed-by: Tony Luck <tony.luck@...el.com>
Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
---
Changes since v6:
 * None

Changes since v5:
 * Introduced this patch.

Changes since v4:
 * N/A

Changes since v3:
 * N/A

Changes since v2:
 * N/A

Changes since v1:
 * N/A
---
 drivers/iommu/intel/irq_remapping.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 1fe30c31fcbe..7b58406ea8d2 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1120,7 +1120,7 @@ static void prepare_irte(struct irte *irte, struct irq_cfg *irq_cfg)
 	 * irq migration in the presence of interrupt-remapping.
 	*/
 	irte->trigger_mode = 0;
-	irte->dlvry_mode = apic->delivery_mode;
+	irte->dlvry_mode = irq_cfg->delivery_mode;
 	irte->vector = irq_cfg->vector;
 	irte->dest_id = IRTE_DEST(irq_cfg->dest_apicid);
 
-- 
2.25.1