git: 19d538c8a5a7 - stable/15 - arm/gic: Make GICV3_IVAR_SUPPORT_LPIS generic

The branch stable/15 has been updated by andrew:

URL: https://cgit.FreeBSD.org/src/commit/?id=19d538c8a5a7f32a1c959c63490b141076bfb4d1

commit 19d538c8a5a7f32a1c959c63490b141076bfb4d1
Author:     Andrew Turner <andrew@FreeBSD.org>
AuthorDate: 2025-11-18 18:00:31 +0000
Commit:     Andrew Turner <andrew@FreeBSD.org>
CommitDate: 2026-01-13 14:06:21 +0000

    arm/gic: Make GICV3_IVAR_SUPPORT_LPIS generic
    
    GICv5 will need this too, so move to the GIC_IVAR namespace.
    
    Sponsored by:   Arm Ltd
    Differential Revision:  https://reviews.freebsd.org/D53663
    
    (cherry picked from commit 8178a4e3c13241804bb9625b2ef4c1b3fea3c7d9)
---
 sys/arm/arm/gic.c        | 3 +++
 sys/arm/arm/gic_common.h | 2 ++
 sys/arm64/arm64/gic_v3.c | 1 +
 3 files changed, 6 insertions(+)

diff --git a/sys/arm/arm/gic.c b/sys/arm/arm/gic.c
index aca4410bf523..c1b2cf626ed8 100644
--- a/sys/arm/arm/gic.c
+++ b/sys/arm/arm/gic.c
@@ -517,6 +517,9 @@ arm_gic_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
 	case GIC_IVAR_VGIC:
 		*result = 0;
 		return (0);
+	case GIC_IVAR_SUPPORT_LPIS:
+		*result = false;
+		return (0);
 	}
 
 	return (ENOENT);
diff --git a/sys/arm/arm/gic_common.h b/sys/arm/arm/gic_common.h
index c45832ec1782..c2d1b1340b9b 100644
--- a/sys/arm/arm/gic_common.h
+++ b/sys/arm/arm/gic_common.h
@@ -38,6 +38,7 @@ struct arm_gic_range {
 #define	GIC_IVAR_HW_REV		500
 #define	GIC_IVAR_BUS		501
 #define	GIC_IVAR_VGIC		502
+#define	GIC_IVAR_SUPPORT_LPIS	503
 
 /* GIC_IVAR_BUS values */
 #define	GIC_BUS_UNKNOWN		0
@@ -48,6 +49,7 @@ struct arm_gic_range {
 __BUS_ACCESSOR(gic, hw_rev, GIC, HW_REV, u_int);
 __BUS_ACCESSOR(gic, bus, GIC, BUS, u_int);
 __BUS_ACCESSOR(gic, vgic, GIC, VGIC, u_int);
+__BUS_ACCESSOR(gic, support_lpis, GIC, SUPPORT_LPIS, bool);
 
 /* Software Generated Interrupts */
 #define	GIC_FIRST_SGI		 0	/* Irqs 0-15 are SGIs/IPIs. */
diff --git a/sys/arm64/arm64/gic_v3.c b/sys/arm64/arm64/gic_v3.c
index 201cdae6de09..43743ba588f5 100644
--- a/sys/arm64/arm64/gic_v3.c
+++ b/sys/arm64/arm64/gic_v3.c
@@ -494,6 +494,7 @@ gic_v3_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
 	case GICV3_IVAR_REDIST:
 		*result = (uintptr_t)&sc->gic_redists.pcpu[PCPU_GET(cpuid)];
 		return (0);
+	case GIC_IVAR_SUPPORT_LPIS:
 	case GICV3_IVAR_SUPPORT_LPIS:
 		*result =
 		    (gic_d_read(sc, 4, GICD_TYPER) & GICD_TYPER_LPIS) != 0;