diff mbox series

[v7,05/24] x86/apic/vector: Skip cleanup for the NMI vector

Message ID 20230301234753.28582-6-ricardo.neri-calderon@linux.intel.com (mailing list archive)
State Handled Elsewhere
Headers show
Series x86: Implement an HPET-based hardlockup detector | expand

Commit Message

Ricardo Neri March 1, 2023, 11:47 p.m. UTC 
The NMI vector is fixed. No cleanup is needed after updating affinity.

Cc: Andi Kleen <ak@linux.intel.com>
Cc: "Ravi V. Shankar" <ravi.v.shankar@intel.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: iommu@lists.linux-foundation.org
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>

---
Changes since v6:
 * Introduced this patch.

Changes since v5:
 * N/A

Changes since v4:
 * N/A

Changes since v3:
 * N/A

Changes since v2:
 * N/A

Changes since v1:
 * N/A
---
 arch/x86/kernel/apic/vector.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index a4cf041427cb..3045823ecc1b 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -1050,6 +1050,10 @@  void send_cleanup_vector(struct irq_cfg *cfg)
 {
 	struct apic_chip_data *apicd;
 
+	/* NMI has a fixed vector. No vector management required. */
+	if (cfg->delivery_mode == APIC_DELIVERY_MODE_NMI)
+		return;
+
 	apicd = container_of(cfg, struct apic_chip_data, hw_irq_cfg);
 	if (apicd->move_in_progress)
 		__send_cleanup_vector(apicd);