GICv4.1 redistributors have a VPE-aware INVALL register. Progress!
We can now emulate a guest-requested INVALL without emiting a
VINVALL command.
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
drivers/irqchip/irq-gic-v3-its.c | 14 ++++++++++++++
include/linux/irqchip/arm-gic-v3.h | 3 +++
2 files changed, 17 insertions(+)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 3079ce74def6..eda35e66237f 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -3506,6 +3506,19 @@ static void its_vpe_4_1_deschedule(struct its_vpe *vpe,
}
}
+static void its_vpe_4_1_invall(struct its_vpe *vpe)
+{
+ void __iomem *rdbase;
+ u64 val;
+
+ val = GICR_INVLPIR_V;
+ val |= FIELD_PREP(GICR_INVLPIR_VPEID, vpe->vpe_id);
+
+ /* Target the redistributor this vPE is currently known on */
+ rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base;
+ gic_write_lpir(val, rdbase + GICR_INVALLR);
+}
+
static int its_vpe_4_1_set_vcpu_affinity(struct irq_data *d, void *vcpu_info)
{
struct its_vpe *vpe = irq_data_get_irq_chip_data(d);
@@ -3521,6 +3534,7 @@ static int its_vpe_4_1_set_vcpu_affinity(struct irq_data *d, void *vcpu_info)
return 0;
case INVALL_VPE:
+ its_vpe_4_1_invall(vpe);
return 0;
default:
diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
index 6fd89d77b2b2..b69f60792554 100644
--- a/include/linux/irqchip/arm-gic-v3.h
+++ b/include/linux/irqchip/arm-gic-v3.h
@@ -247,6 +247,9 @@
#define GICR_TYPER_COMMON_LPI_AFF GENMASK_ULL(25, 24)
#define GICR_TYPER_AFFINITY GENMASK_ULL(63, 32)
+#define GICR_INVLPIR_VPEID GENMASK_ULL(47, 32)
+#define GICR_INVLPIR_V GENMASK_ULL(63, 63)
+
#define GIC_V3_REDIST_SIZE 0x20000
#define LPI_PROP_GROUP1 (1 << 1)
--
2.20.1
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