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Diffstat (limited to 'hw/intc/xics.c')
-rw-r--r--hw/intc/xics.c182
1 files changed, 167 insertions, 15 deletions
diff --git a/hw/intc/xics.c b/hw/intc/xics.c
index 76dd6f5708..0fd2a84c7b 100644
--- a/hw/intc/xics.c
+++ b/hw/intc/xics.c
@@ -437,7 +437,7 @@ static void ics_set_irq(void *opaque, int srcno, int val)
{
ICSState *ics = (ICSState *)opaque;
- if (ics->islsi[srcno]) {
+ if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
set_irq_lsi(ics, srcno, val);
} else {
set_irq_msi(ics, srcno, val);
@@ -474,7 +474,7 @@ static void ics_write_xive(ICSState *ics, int nr, int server,
trace_xics_ics_write_xive(nr, srcno, server, priority);
- if (ics->islsi[srcno]) {
+ if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
write_xive_lsi(ics, srcno);
} else {
write_xive_msi(ics, srcno);
@@ -496,7 +496,7 @@ static void ics_resend(ICSState *ics)
for (i = 0; i < ics->nr_irqs; i++) {
/* FIXME: filter by server#? */
- if (ics->islsi[i]) {
+ if (ics->irqs[i].flags & XICS_FLAGS_IRQ_LSI) {
resend_lsi(ics, i);
} else {
resend_msi(ics, i);
@@ -511,7 +511,7 @@ static void ics_eoi(ICSState *ics, int nr)
trace_xics_ics_eoi(nr);
- if (ics->islsi[srcno]) {
+ if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
irq->status &= ~XICS_STATUS_SENT;
}
}
@@ -520,11 +520,18 @@ static void ics_reset(DeviceState *dev)
{
ICSState *ics = ICS(dev);
int i;
+ uint8_t flags[ics->nr_irqs];
+
+ for (i = 0; i < ics->nr_irqs; i++) {
+ flags[i] = ics->irqs[i].flags;
+ }
memset(ics->irqs, 0, sizeof(ICSIRQState) * ics->nr_irqs);
+
for (i = 0; i < ics->nr_irqs; i++) {
ics->irqs[i].priority = 0xff;
ics->irqs[i].saved_priority = 0xff;
+ ics->irqs[i].flags = flags[i];
}
}
@@ -563,13 +570,14 @@ static int ics_dispatch_post_load(void *opaque, int version_id)
static const VMStateDescription vmstate_ics_irq = {
.name = "ics/irq",
- .version_id = 1,
+ .version_id = 2,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(server, ICSIRQState),
VMSTATE_UINT8(priority, ICSIRQState),
VMSTATE_UINT8(saved_priority, ICSIRQState),
VMSTATE_UINT8(status, ICSIRQState),
+ VMSTATE_UINT8(flags, ICSIRQState),
VMSTATE_END_OF_LIST()
},
};
@@ -606,7 +614,6 @@ static void ics_realize(DeviceState *dev, Error **errp)
return;
}
ics->irqs = g_malloc0(ics->nr_irqs * sizeof(ICSIRQState));
- ics->islsi = g_malloc0(ics->nr_irqs * sizeof(bool));
ics->qirqs = qemu_allocate_irqs(ics_set_irq, ics, ics->nr_irqs);
}
@@ -633,21 +640,166 @@ static const TypeInfo ics_info = {
/*
* Exported functions
*/
+static int xics_find_source(XICSState *icp, int irq)
+{
+ int sources = 1;
+ int src;
+
+ /* FIXME: implement multiple sources */
+ for (src = 0; src < sources; ++src) {
+ ICSState *ics = &icp->ics[src];
+ if (ics_valid_irq(ics, irq)) {
+ return src;
+ }
+ }
+
+ return -1;
+}
qemu_irq xics_get_qirq(XICSState *icp, int irq)
{
- if (!ics_valid_irq(icp->ics, irq)) {
- return NULL;
+ int src = xics_find_source(icp, irq);
+
+ if (src >= 0) {
+ ICSState *ics = &icp->ics[src];
+ return ics->qirqs[irq - ics->offset];
}
- return icp->ics->qirqs[irq - icp->ics->offset];
+ return NULL;
+}
+
+static void ics_set_irq_type(ICSState *ics, int srcno, bool lsi)
+{
+ assert(!(ics->irqs[srcno].flags & XICS_FLAGS_IRQ_MASK));
+
+ ics->irqs[srcno].flags |=
+ lsi ? XICS_FLAGS_IRQ_LSI : XICS_FLAGS_IRQ_MSI;
}
void xics_set_irq_type(XICSState *icp, int irq, bool lsi)
{
- assert(ics_valid_irq(icp->ics, irq));
+ int src = xics_find_source(icp, irq);
+ ICSState *ics;
- icp->ics->islsi[irq - icp->ics->offset] = lsi;
+ assert(src >= 0);
+
+ ics = &icp->ics[src];
+ ics_set_irq_type(ics, irq - ics->offset, lsi);
+}
+
+#define ICS_IRQ_FREE(ics, srcno) \
+ (!((ics)->irqs[(srcno)].flags & (XICS_FLAGS_IRQ_MASK)))
+
+static int ics_find_free_block(ICSState *ics, int num, int alignnum)
+{
+ int first, i;
+
+ for (first = 0; first < ics->nr_irqs; first += alignnum) {
+ if (num > (ics->nr_irqs - first)) {
+ return -1;
+ }
+ for (i = first; i < first + num; ++i) {
+ if (!ICS_IRQ_FREE(ics, i)) {
+ break;
+ }
+ }
+ if (i == (first + num)) {
+ return first;
+ }
+ }
+
+ return -1;
+}
+
+int xics_alloc(XICSState *icp, int src, int irq_hint, bool lsi)
+{
+ ICSState *ics = &icp->ics[src];
+ int irq;
+
+ if (irq_hint) {
+ assert(src == xics_find_source(icp, irq_hint));
+ if (!ICS_IRQ_FREE(ics, irq_hint - ics->offset)) {
+ trace_xics_alloc_failed_hint(src, irq_hint);
+ return -1;
+ }
+ irq = irq_hint;
+ } else {
+ irq = ics_find_free_block(ics, 1, 1);
+ if (irq < 0) {
+ trace_xics_alloc_failed_no_left(src);
+ return -1;
+ }
+ irq += ics->offset;
+ }
+
+ ics_set_irq_type(ics, irq - ics->offset, lsi);
+ trace_xics_alloc(src, irq);
+
+ return irq;
+}
+
+/*
+ * Allocate block of consequtive IRQs, returns a number of the first.
+ * If align==true, aligns the first IRQ number to num.
+ */
+int xics_alloc_block(XICSState *icp, int src, int num, bool lsi, bool align)
+{
+ int i, first = -1;
+ ICSState *ics = &icp->ics[src];
+
+ assert(src == 0);
+ /*
+ * MSIMesage::data is used for storing VIRQ so
+ * it has to be aligned to num to support multiple
+ * MSI vectors. MSI-X is not affected by this.
+ * The hint is used for the first IRQ, the rest should
+ * be allocated continuously.
+ */
+ if (align) {
+ assert((num == 1) || (num == 2) || (num == 4) ||
+ (num == 8) || (num == 16) || (num == 32));
+ first = ics_find_free_block(ics, num, num);
+ } else {
+ first = ics_find_free_block(ics, num, 1);
+ }
+
+ if (first >= 0) {
+ for (i = first; i < first + num; ++i) {
+ ics_set_irq_type(ics, i, lsi);
+ }
+ }
+ first += ics->offset;
+
+ trace_xics_alloc_block(src, first, num, lsi, align);
+
+ return first;
+}
+
+static void ics_free(ICSState *ics, int srcno, int num)
+{
+ int i;
+
+ for (i = srcno; i < srcno + num; ++i) {
+ if (ICS_IRQ_FREE(ics, i)) {
+ trace_xics_ics_free_warn(ics - ics->icp->ics, i + ics->offset);
+ }
+ memset(&ics->irqs[i], 0, sizeof(ICSIRQState));
+ }
+}
+
+void xics_free(XICSState *icp, int irq, int num)
+{
+ int src = xics_find_source(icp, irq);
+
+ if (src >= 0) {
+ ICSState *ics = &icp->ics[src];
+
+ /* FIXME: implement multiple sources */
+ assert(src == 0);
+
+ trace_xics_ics_free(ics - icp->ics, irq, num);
+ ics_free(ics, irq - ics->offset, num);
+ }
}
/*
@@ -866,10 +1018,10 @@ static void xics_realize(DeviceState *dev, Error **errp)
}
/* Registration of global state belongs into realize */
- spapr_rtas_register("ibm,set-xive", rtas_set_xive);
- spapr_rtas_register("ibm,get-xive", rtas_get_xive);
- spapr_rtas_register("ibm,int-off", rtas_int_off);
- spapr_rtas_register("ibm,int-on", rtas_int_on);
+ spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_set_xive);
+ spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_get_xive);
+ spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_int_off);
+ spapr_rtas_register(RTAS_IBM_INT_ON, "ibm,int-on", rtas_int_on);
spapr_register_hypercall(H_CPPR, h_cppr);
spapr_register_hypercall(H_IPI, h_ipi);
generated by cgit v1.2.3 (git 2.26.2) at 2025-02-11 21:02:52 +0000