#include "hw/intc/arm_gicv3_common.h"
#include "gicv3_internal.h"
#include "hw/arm/linux-boot-if.h"
+#include "sysemu/kvm.h"
-static void gicv3_pre_save(void *opaque)
+
+static void gicv3_gicd_no_migration_shift_bug_post_load(GICv3State *cs)
+{
+ if (cs->gicd_no_migration_shift_bug) {
+ return;
+ }
+
+ /* Older versions of QEMU had a bug in the handling of state save/restore
+ * to the KVM GICv3: they got the offset in the bitmap arrays wrong,
+ * so that instead of the data for external interrupts 32 and up
+ * starting at bit position 32 in the bitmap, it started at bit
+ * position 64. If we're receiving data from a QEMU with that bug,
+ * we must move the data down into the right place.
+ */
+ memmove(cs->group, (uint8_t *)cs->group + GIC_INTERNAL / 8,
+ sizeof(cs->group) - GIC_INTERNAL / 8);
+ memmove(cs->grpmod, (uint8_t *)cs->grpmod + GIC_INTERNAL / 8,
+ sizeof(cs->grpmod) - GIC_INTERNAL / 8);
+ memmove(cs->enabled, (uint8_t *)cs->enabled + GIC_INTERNAL / 8,
+ sizeof(cs->enabled) - GIC_INTERNAL / 8);
+ memmove(cs->pending, (uint8_t *)cs->pending + GIC_INTERNAL / 8,
+ sizeof(cs->pending) - GIC_INTERNAL / 8);
+ memmove(cs->active, (uint8_t *)cs->active + GIC_INTERNAL / 8,
+ sizeof(cs->active) - GIC_INTERNAL / 8);
+ memmove(cs->edge_trigger, (uint8_t *)cs->edge_trigger + GIC_INTERNAL / 8,
+ sizeof(cs->edge_trigger) - GIC_INTERNAL / 8);
+
+ /*
+ * While this new version QEMU doesn't have this kind of bug as we fix it,
+ * so it needs to set the flag to true to indicate that and it's necessary
+ * for next migration to work from this new version QEMU.
+ */
+ cs->gicd_no_migration_shift_bug = true;
+}
+
+static int gicv3_pre_save(void *opaque)
{
GICv3State *s = (GICv3State *)opaque;
ARMGICv3CommonClass *c = ARM_GICV3_COMMON_GET_CLASS(s);
if (c->pre_save) {
c->pre_save(s);
}
+
+ return 0;
}
static int gicv3_post_load(void *opaque, int version_id)
GICv3State *s = (GICv3State *)opaque;
ARMGICv3CommonClass *c = ARM_GICV3_COMMON_GET_CLASS(s);
+ gicv3_gicd_no_migration_shift_bug_post_load(s);
+
if (c->post_load) {
c->post_load(s);
}
}
};
-static int icc_sre_el1_reg_pre_load(void *opaque)
+static int vmstate_gicv3_cpu_pre_load(void *opaque)
{
GICv3CPUState *cs = opaque;
.name = "arm_gicv3_cpu/sre_el1",
.version_id = 1,
.minimum_version_id = 1,
- .pre_load = icc_sre_el1_reg_pre_load,
.needed = icc_sre_el1_reg_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT64(icc_sre_el1, GICv3CPUState),
.name = "arm_gicv3_cpu",
.version_id = 1,
.minimum_version_id = 1,
+ .pre_load = vmstate_gicv3_cpu_pre_load,
.fields = (VMStateField[]) {
VMSTATE_UINT32(level, GICv3CPUState),
VMSTATE_UINT32(gicr_ctlr, GICv3CPUState),
},
.subsections = (const VMStateDescription * []) {
&vmstate_gicv3_cpu_virt,
- NULL
- },
- .subsections = (const VMStateDescription * []) {
&vmstate_gicv3_cpu_sre_el1,
NULL
}
};
+static int gicv3_pre_load(void *opaque)
+{
+ GICv3State *cs = opaque;
+
+ /*
+ * The gicd_no_migration_shift_bug flag is used for migration compatibility
+ * for old version QEMU which may have the GICD bmp shift bug under KVM mode.
+ * Strictly, what we want to know is whether the migration source is using
+ * KVM. Since we don't have any way to determine that, we look at whether the
+ * destination is using KVM; this is close enough because for the older QEMU
+ * versions with this bug KVM -> TCG migration didn't work anyway. If the
+ * source is a newer QEMU without this bug it will transmit the migration
+ * subsection which sets the flag to true; otherwise it will remain set to
+ * the value we select here.
+ */
+ if (kvm_enabled()) {
+ cs->gicd_no_migration_shift_bug = false;
+ }
+
+ return 0;
+}
+
+static bool needed_always(void *opaque)
+{
+ return true;
+}
+
+const VMStateDescription vmstate_gicv3_gicd_no_migration_shift_bug = {
+ .name = "arm_gicv3/gicd_no_migration_shift_bug",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = needed_always,
+ .fields = (VMStateField[]) {
+ VMSTATE_BOOL(gicd_no_migration_shift_bug, GICv3State),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static const VMStateDescription vmstate_gicv3 = {
.name = "arm_gicv3",
.version_id = 1,
.minimum_version_id = 1,
+ .pre_load = gicv3_pre_load,
.pre_save = gicv3_pre_save,
.post_load = gicv3_post_load,
.priority = MIG_PRI_GICV3,
VMSTATE_STRUCT_VARRAY_POINTER_UINT32(cpu, GICv3State, num_cpu,
vmstate_gicv3_cpu, GICv3CPUState),
VMSTATE_END_OF_LIST()
+ },
+ .subsections = (const VMStateDescription * []) {
+ &vmstate_gicv3_gicd_no_migration_shift_bug,
+ NULL
}
};
void gicv3_init_irqs_and_mmio(GICv3State *s, qemu_irq_handler handler,
- const MemoryRegionOps *ops)
+ const MemoryRegionOps *ops, Error **errp)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(s);
+ int rdist_capacity = 0;
int i;
+ for (i = 0; i < s->nb_redist_regions; i++) {
+ rdist_capacity += s->redist_region_count[i];
+ }
+ if (rdist_capacity < s->num_cpu) {
+ error_setg(errp, "Capacity of the redist regions(%d) "
+ "is less than number of vcpus(%d)",
+ rdist_capacity, s->num_cpu);
+ return;
+ }
+
/* For the GIC, also expose incoming GPIO lines for PPIs for each CPU.
* GPIO array layout is thus:
* [0..N-1] spi
memory_region_init_io(&s->iomem_dist, OBJECT(s), ops, s,
"gicv3_dist", 0x10000);
- memory_region_init_io(&s->iomem_redist, OBJECT(s), ops ? &ops[1] : NULL, s,
- "gicv3_redist", 0x20000 * s->num_cpu);
-
sysbus_init_mmio(sbd, &s->iomem_dist);
- sysbus_init_mmio(sbd, &s->iomem_redist);
+
+ s->iomem_redist = g_new0(MemoryRegion, s->nb_redist_regions);
+ for (i = 0; i < s->nb_redist_regions; i++) {
+ char *name = g_strdup_printf("gicv3_redist_region[%d]", i);
+
+ memory_region_init_io(&s->iomem_redist[i], OBJECT(s),
+ ops ? &ops[1] : NULL, s, name,
+ s->redist_region_count[i] * GICV3_REDIST_SIZE);
+ sysbus_init_mmio(sbd, &s->iomem_redist[i]);
+ g_free(name);
+ }
}
static void arm_gicv3_common_realize(DeviceState *dev, Error **errp)
}
}
+static void arm_gicv3_finalize(Object *obj)
+{
+ GICv3State *s = ARM_GICV3_COMMON(obj);
+
+ g_free(s->redist_region_count);
+}
+
static void arm_gicv3_common_reset(DeviceState *dev)
{
GICv3State *s = ARM_GICV3_COMMON(dev);
gicv3_gicd_group_set(s, i);
}
}
+ s->gicd_no_migration_shift_bug = true;
}
static void arm_gic_common_linux_init(ARMLinuxBootIf *obj,
DEFINE_PROP_UINT32("num-irq", GICv3State, num_irq, 32),
DEFINE_PROP_UINT32("revision", GICv3State, revision, 3),
DEFINE_PROP_BOOL("has-security-extensions", GICv3State, security_extn, 0),
+ DEFINE_PROP_ARRAY("redist-region-count", GICv3State, nb_redist_regions,
+ redist_region_count, qdev_prop_uint32, uint32_t),
DEFINE_PROP_END_OF_LIST(),
};
.instance_size = sizeof(GICv3State),
.class_size = sizeof(ARMGICv3CommonClass),
.class_init = arm_gicv3_common_class_init,
+ .instance_finalize = arm_gicv3_finalize,
.abstract = true,
.interfaces = (InterfaceInfo []) {
{ TYPE_ARM_LINUX_BOOT_IF },
projects / qemu.git / blobdiff