@@ -34,6 +34,7 @@ obj-y += shutdown.o
obj-y += traps.o
obj-y += vgic.o vgic-v2.o
obj-$(CONFIG_ARM_64) += vgic-v3.o
+obj-$(CONFIG_ARM_64) += vgic-v3-its.o
obj-y += vtimer.o
obj-y += vuart.o
obj-y += hvm.o
@@ -37,6 +37,7 @@
#include <asm/gic.h>
#include <asm/gic_v3_defs.h>
#include <asm/gic-its.h>
+#include <asm/vits.h>
#include <xen/log2.h>
#define its_print(lvl, fmt, ...) \
@@ -86,8 +87,16 @@ struct its_node {
u64 flags;
u32 ite_size;
struct dt_device_node *dt_node;
+ u8 eventID_bits;
+ u8 devID_bits;
};
+/* Contains common and collective data of all the its nodes. */
+static struct {
+ u8 eventID_bits;
+ u8 devID_bits;
+} its_data;
+
#define ITS_ITT_ALIGN SZ_256
static LIST_HEAD(its_nodes);
@@ -812,6 +821,8 @@ int its_add_device(u32 devid, u32 nr_ites, struct dt_device_node *dt_its)
goto err_unlock;
}
+ ASSERT(dev->event_map.nr_lpis < (1 << dev->its->eventID_bits));
+
BUG_ON(its_insert_device(dev));
spin_unlock(&rb_its_dev_lock);
@@ -915,6 +926,14 @@ int its_assign_device(struct domain *d, u32 vdevid, u32 pdevid)
return 0;
}
+static void update_its_data(struct its_node *its)
+{
+ if ( its_data.eventID_bits < its->eventID_bits )
+ its_data.eventID_bits = its->eventID_bits;
+ if ( its_data.devID_bits < its->devID_bits )
+ its_data.devID_bits = its->devID_bits;
+}
+
/*
* We allocate 64kB for PROPBASE. That gives us at most 64K LPIs to
* deal with (one configuration byte per interrupt). PENDBASE has to
@@ -1360,6 +1379,9 @@ static int its_probe(struct dt_device_node *node)
its->phys_size = its_size;
typer = readl_relaxed(its_base + GITS_TYPER);
its->ite_size = ((typer >> 4) & 0xf) + 1;
+ its->eventID_bits = GITS_TYPER_IDBITS(typer);
+ its->devID_bits = GITS_TYPER_DEVBITS(typer);
+ update_its_data(its);
its->cmd_base = xzalloc_bytes(ITS_CMD_QUEUE_SZ);
if ( !its->cmd_base )
@@ -1451,6 +1473,7 @@ int its_cpu_init(void)
int __init its_init(struct rdist_prop *rdists)
{
+ struct its_node *its;
struct dt_device_node *np = NULL;
static const struct dt_device_match its_device_ids[] __initconst =
@@ -1473,6 +1496,16 @@ int __init its_init(struct rdist_prop *rdists)
its_alloc_lpi_tables();
its_lpi_init(rdists->id_bits);
+ its = list_first_entry(&its_nodes, struct its_node, entry);
+ /*
+ * As per vITS design spec, Xen exposes only one virtual ITS per domain.
+ * This simplifies vITS command model. I.e simplifies processing global
+ * ITS commands which does not have device ID on platform having more
+ * than one physical ITS.
+ */
+ vits_setup_hw(its_data.devID_bits, its_data.eventID_bits,
+ its->phys_base, its->phys_size);
+
return 0;
}
@@ -70,6 +70,26 @@ static void dump_cmd(const its_cmd_block *cmd)
static void dump_cmd(const its_cmd_block *cmd) { }
#endif
+static struct {
+ bool_t enabled;
+ uint8_t devID_bits;
+ uint8_t eventID_bits;
+ /* GITS physical base */
+ paddr_t phys_base;
+ /* GITS physical size */
+ unsigned long phys_size;
+} vits_hw;
+
+void vits_setup_hw(uint8_t devID_bits, uint8_t eventID_bits,
+ paddr_t phys_base, unsigned long phys_size)
+{
+ vits_hw.enabled = 1;
+ vits_hw.devID_bits = devID_bits;
+ vits_hw.eventID_bits = eventID_bits;
+ vits_hw.phys_base = phys_base;
+ vits_hw.phys_size = phys_size;
+}
+
static inline uint16_t vits_get_max_collections(struct domain *d)
{
/*
@@ -838,6 +858,7 @@ int vits_domain_init(struct domain *d)
}
ASSERT(is_hardware_domain(d));
+ ASSERT(vits_hw.enabled);
d->arch.vgic.vits = xzalloc(struct vgic_its);
if ( !d->arch.vgic.vits )
@@ -93,6 +93,8 @@ int vits_get_vitt_entry(struct domain *d, uint32_t devid, uint32_t event,
struct vitt *entry);
int vits_get_vdevice_entry(struct domain *d, uint32_t devid,
struct vdevice_table *entry);
+void vits_setup_hw(uint8_t dev_bits, uint8_t eventid_bits,
+ paddr_t base, unsigned long size);
#endif /* __ASM_ARM_VITS_H__ */
/*