[PATCH v3 17/19] KVM: selftests: Add helper for enabling LPIs on a redistributor

[Oliver Upton <oliver.upton@xxxxxxxxx>]

The selftests GIC library presently does not support LPIs. Add a
userspace helper for configuring a redistributor for LPIs, installing
an LPI configuration table and LPI pending table.

Signed-off-by: Oliver Upton <oliver.upton@xxxxxxxxx>
---
 .../selftests/kvm/include/aarch64/gic.h       |  3 +++
 .../selftests/kvm/lib/aarch64/gic_v3.c        | 24 +++++++++++++++++++
 .../testing/selftests/kvm/lib/aarch64/vgic.c  |  2 ++
 3 files changed, 29 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/aarch64/gic.h b/tools/testing/selftests/kvm/include/aarch64/gic.h
index 6d03188435e4..baeb3c859389 100644
--- a/tools/testing/selftests/kvm/include/aarch64/gic.h
+++ b/tools/testing/selftests/kvm/include/aarch64/gic.h
@@ -58,4 +58,7 @@ void gic_irq_clear_pending(unsigned int intid);
 bool gic_irq_get_pending(unsigned int intid);
 void gic_irq_set_config(unsigned int intid, bool is_edge);
 
+void gic_rdist_enable_lpis(vm_paddr_t cfg_table, size_t cfg_table_size,
+			   vm_paddr_t pend_table);
+
 #endif /* SELFTEST_KVM_GIC_H */
diff --git a/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c b/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c
index 515335179045..66d05506f78b 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/gic_v3.c
@@ -401,3 +401,27 @@ const struct gic_common_ops gicv3_ops = {
 	.gic_irq_get_pending = gicv3_irq_get_pending,
 	.gic_irq_set_config = gicv3_irq_set_config,
 };
+
+void gic_rdist_enable_lpis(vm_paddr_t cfg_table, size_t cfg_table_size,
+			   vm_paddr_t pend_table)
+{
+	volatile void *rdist_base = gicr_base_cpu(guest_get_vcpuid());
+
+	u32 ctlr;
+	u64 val;
+
+	val = (cfg_table |
+	       GICR_PROPBASER_InnerShareable |
+	       GICR_PROPBASER_RaWaWb |
+	       ((ilog2(cfg_table_size) - 1) & GICR_PROPBASER_IDBITS_MASK));
+	writeq_relaxed(val, rdist_base + GICR_PROPBASER);
+
+	val = (pend_table |
+	       GICR_PENDBASER_InnerShareable |
+	       GICR_PENDBASER_RaWaWb);
+	writeq_relaxed(val, rdist_base + GICR_PENDBASER);
+
+	ctlr = readl_relaxed(rdist_base + GICR_CTLR);
+	ctlr |= GICR_CTLR_ENABLE_LPIS;
+	writel_relaxed(ctlr, rdist_base + GICR_CTLR);
+}
diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c
index 5e8f0d5382c2..4427f43f73ea 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/vgic.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c
@@ -3,8 +3,10 @@
  * ARM Generic Interrupt Controller (GIC) v3 host support
  */
 
+#include <linux/kernel.h>
 #include <linux/kvm.h>
 #include <linux/sizes.h>
+#include <asm/cputype.h>
 #include <asm/kvm_para.h>
 #include <asm/kvm.h>
 
-- 
2.44.0.769.g3c40516874-goog