[Old email, doing some v3 cleanup]
On 2019-11-01 11:51, Zenghui Yu wrote:
Hi Marc,
On 2019/10/27 22:42, Marc Zyngier wrote:
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>
Reviewed-by: Zenghui Yu <yuzenghui@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 f7effd453729..10bd156aa042 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -3511,6 +3511,19 @@ 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);
Can we use GICR_INVALL_V/VPEID instead, and ...
+
+ /* 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);
@@ -3526,6 +3539,7 @@ 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 them here:
#define GICR_INVALL_VPEID GICR_INVLPIR_VPEID
#define GICR_INVALL_V GICR_INVLPIR_V
Yes, that's a sensible things to do. I'll squash that in my rebased
series.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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