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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Dec 2025 15:23:46.3157 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b0954ad8-12cc-4f06-97a1-08de3992716d X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: DB5PEPF00014B95.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB10362 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251212_072354_472020_9DF9DE5F X-CRM114-Status: GOOD ( 14.13 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Initialise the private interrupts (PPIs, only) for GICv5. This means that a GICv5-style intid is generated (which encodes the PPI type in the top bits) instead of the 0-based index that is used for older GICs. Additionally, set all of the GICv5 PPIs to use Level for the handling mode, with the exception of the SW_PPI which uses Edge. This matches the architecturally-defined set in the GICv5 specification (the CTIIRQ handling mode is IMPDEF, so pick Level has been picked for that). Signed-off-by: Sascha Bischoff --- arch/arm64/kvm/vgic/vgic-init.c | 41 +++++++++++++++++++++++------- include/linux/irqchip/arm-gic-v5.h | 2 ++ 2 files changed, 34 insertions(+), 9 deletions(-) diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-ini= t.c index b246cb6eae71b..51f4443cebcef 100644 --- a/arch/arm64/kvm/vgic/vgic-init.c +++ b/arch/arm64/kvm/vgic/vgic-init.c @@ -263,13 +263,19 @@ static int vgic_allocate_private_irqs_locked(struct k= vm_vcpu *vcpu, u32 type) { struct vgic_cpu *vgic_cpu =3D &vcpu->arch.vgic_cpu; int i; + u32 num_private_irqs; + + if (vgic_is_v5(vcpu->kvm)) + num_private_irqs =3D VGIC_V5_NR_PRIVATE_IRQS; + else + num_private_irqs =3D VGIC_NR_PRIVATE_IRQS; =20 lockdep_assert_held(&vcpu->kvm->arch.config_lock); =20 if (vgic_cpu->private_irqs) return 0; =20 - vgic_cpu->private_irqs =3D kcalloc(VGIC_NR_PRIVATE_IRQS, + vgic_cpu->private_irqs =3D kcalloc(num_private_irqs, sizeof(struct vgic_irq), GFP_KERNEL_ACCOUNT); =20 @@ -280,22 +286,39 @@ static int vgic_allocate_private_irqs_locked(struct k= vm_vcpu *vcpu, u32 type) * Enable and configure all SGIs to be edge-triggered and * configure all PPIs as level-triggered. */ - for (i =3D 0; i < VGIC_NR_PRIVATE_IRQS; i++) { + for (i =3D 0; i < num_private_irqs; i++) { struct vgic_irq *irq =3D &vgic_cpu->private_irqs[i]; =20 INIT_LIST_HEAD(&irq->ap_list); raw_spin_lock_init(&irq->irq_lock); - irq->intid =3D i; irq->vcpu =3D NULL; irq->target_vcpu =3D vcpu; refcount_set(&irq->refcount, 0); - if (vgic_irq_is_sgi(i)) { - /* SGIs */ - irq->enabled =3D 1; - irq->config =3D VGIC_CONFIG_EDGE; + if (!vgic_is_v5(vcpu->kvm)) { + irq->intid =3D i; + if (vgic_irq_is_sgi(i)) { + /* SGIs */ + irq->enabled =3D 1; + irq->config =3D VGIC_CONFIG_EDGE; + } else { + /* PPIs */ + irq->config =3D VGIC_CONFIG_LEVEL; + } } else { - /* PPIs */ - irq->config =3D VGIC_CONFIG_LEVEL; + irq->intid =3D i | FIELD_PREP(GICV5_HWIRQ_TYPE, + GICV5_HWIRQ_TYPE_PPI); + + /* + * The only architected PPI that is Edge is + * the SW PPI. + */ + if (irq->intid =3D=3D GICV5_SW_PPI) + irq->config =3D VGIC_CONFIG_EDGE; + else + irq->config =3D VGIC_CONFIG_LEVEL; + + /* Register the GICv5-specific PPI ops */ + vgic_v5_set_ppi_ops(irq); } =20 switch (type) { diff --git a/include/linux/irqchip/arm-gic-v5.h b/include/linux/irqchip/arm= -gic-v5.h index ff10d6c7be2ae..9607b36f021ee 100644 --- a/include/linux/irqchip/arm-gic-v5.h +++ b/include/linux/irqchip/arm-gic-v5.h @@ -13,6 +13,8 @@ =20 #define GICV5_IPIS_PER_CPU MAX_IPI =20 +#define GICV5_SW_PPI 0x20000003 + /* * INTID handling */ --=20 2.34.1