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Index: head/sys/arm64/arm64/gic_v3.c
===================================================================
--- head/sys/arm64/arm64/gic_v3.c
+++ head/sys/arm64/arm64/gic_v3.c
@@ -1185,6 +1185,7 @@
("Invalid pointer to per-CPU redistributor"));
/* Copy res contents to its final destination */
sc->gic_redists.pcpu[cpuid]->res = r_res;
+ sc->gic_redists.pcpu[cpuid]->lpi_enabled = false;
if (bootverbose) {
device_printf(sc->dev,
"CPU%u Re-Distributor has been found\n",
Index: head/sys/arm64/arm64/gic_v3_var.h
===================================================================
--- head/sys/arm64/arm64/gic_v3_var.h
+++ head/sys/arm64/arm64/gic_v3_var.h
@@ -41,8 +41,9 @@
struct gic_v3_irqsrc;
struct redist_pcpu {
- struct resource res;
+ struct resource res; /* mem resource for redist */
vm_offset_t pend_base;
+ bool lpi_enabled; /* redist LPI configured? */
};
struct gic_redists {
Index: head/sys/arm64/arm64/gicv3_its.c
===================================================================
--- head/sys/arm64/arm64/gicv3_its.c
+++ head/sys/arm64/arm64/gicv3_its.c
@@ -672,11 +672,16 @@
if ((gic_r_read_4(gicv3, GICR_TYPER) & GICR_TYPER_PLPIS) == 0)
return (ENXIO);
- its_init_cpu_lpi(dev, sc);
+ rpcpu = gicv3_get_redist(dev);
+ /* Do per-cpu LPI init once */
+ if (!rpcpu->lpi_enabled) {
+ its_init_cpu_lpi(dev, sc);
+ rpcpu->lpi_enabled = true;
+ }
+
if ((gic_its_read_8(sc, GITS_TYPER) & GITS_TYPER_PTA) != 0) {
/* This ITS wants the redistributor physical address */
- rpcpu = gicv3_get_redist(dev);
target = vtophys(rman_get_virtual(&rpcpu->res));
} else {
/* This ITS wants the unique processor number */

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