base: Add IRQ affinity logging and CPU tracking to pcid (P49)

Track the target CPU ID in InterruptVector, and log the interrupt type (MSI-X/MSI/Legacy) and CPU affinity at allocation time in pci_allocate_interrupt_vector. Add log_affinity() helper for drivers to call after setup.
2026-05-20 17:55:36 +03:00
parent b360748b82
commit 3890840001
2 changed files with 48 additions and 0 deletions
@@ -0,0 +1,46 @@
+diff --git a/drivers/pcid/src/driver_interface/irq_helpers.rs b/drivers/pcid/src/driver_interface/irq_helpers.rs
+index 28ca077a..dadf6192 100644
+--- a/drivers/pcid/src/driver_interface/irq_helpers.rs
+++ b/drivers/pcid/src/driver_interface/irq_helpers.rs
+@@ -233,0 +234 @@ pub struct InterruptVector {
+    cpu_id: usize,
+@@ -251,0 +253,4 @@ impl InterruptVector {
+    pub fn cpu_id(&self) -> usize {
+        self.cpu_id
+    }
+
+@@ -260,0 +266,14 @@ impl InterruptVector {
+
+    /// Log the IRQ affinity for this vector.
+    pub fn log_affinity(&self, driver: &str) {
+        let kind_str = match self.kind {
+            InterruptVectorKind::Legacy => "legacy",
+            InterruptVectorKind::Msi => "MSI",
+            InterruptVectorKind::MsiX { .. } => "MSI-X",
+        };
+        log::info!(
+            "{driver}: IRQ affinity = {kind_str} on CPU {} vector {}",
+            self.cpu_id,
+            self.vector
+        );
+    }
+@@ -294,0 +314 @@ pub fn pci_allocate_interrupt_vector(
+        log::info!("{driver}: allocated MSI-X interrupt on CPU {bsp_cpu_id}");
+@@ -297,0 +318 @@ pub fn pci_allocate_interrupt_vector(
+            cpu_id: bsp_cpu_id,
+@@ -300,0 +322,3 @@ pub fn pci_allocate_interrupt_vector(
+        let bsp_cpu_id = read_bsp_apic_id()
+            .unwrap_or_else(|err| panic!("{driver}: failed to read BSP APIC ID: {err}"));
+        log::info!("{driver}: allocated MSI interrupt on CPU {bsp_cpu_id}");
+@@ -303,0 +328 @@ pub fn pci_allocate_interrupt_vector(
+            cpu_id: bsp_cpu_id,
+@@ -307,0 +333,2 @@ pub fn pci_allocate_interrupt_vector(
+        let bsp_cpu_id = read_bsp_apic_id().unwrap_or(0);
+        log::info!("{driver}: allocated legacy INTx interrupt on CPU {bsp_cpu_id}");
+@@ -310,0 +338 @@ pub fn pci_allocate_interrupt_vector(
+            cpu_id: bsp_cpu_id,
+@@ -325,0 +354,2 @@ pub fn pci_allocate_interrupt_vector(
+        let bsp_cpu_id = read_bsp_apic_id().unwrap_or(0);
+        log::info!("{driver}: allocated legacy INTx interrupt on CPU {bsp_cpu_id}");
+@@ -328,0 +359 @@ pub fn pci_allocate_interrupt_vector(
+            cpu_id: bsp_cpu_id,
@@ -97,6 +97,8 @@ patches = [
    "P47-thermald-backend.patch",
    # P48: Add ACPI fan device discovery and status exposure
    "P48-acpid-fan-support.patch",
+    # P49: Add IRQ affinity logging and CPU tracking to pcid
+    "P49-irq-affinity-logging.patch",
 ]

 [package]