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-rw-r--r--hw/spapr.c5
-rw-r--r--hw/spapr.h13
-rw-r--r--hw/spapr_pci.c2
-rw-r--r--hw/spapr_vio.c2
-rw-r--r--hw/xics.c125
-rw-r--r--hw/xics.h8
6 files changed, 117 insertions, 38 deletions
diff --git a/hw/spapr.c b/hw/spapr.c
index 3719e0e4a7..bfaf260d54 100644
--- a/hw/spapr.c
+++ b/hw/spapr.c
@@ -83,7 +83,8 @@
sPAPREnvironment *spapr;
-qemu_irq spapr_allocate_irq(uint32_t hint, uint32_t *irq_num)
+qemu_irq spapr_allocate_irq(uint32_t hint, uint32_t *irq_num,
+ enum xics_irq_type type)
{
uint32_t irq;
qemu_irq qirq;
@@ -95,7 +96,7 @@ qemu_irq spapr_allocate_irq(uint32_t hint, uint32_t *irq_num)
irq = spapr->next_irq++;
}
- qirq = xics_find_qirq(spapr->icp, irq);
+ qirq = xics_assign_irq(spapr->icp, irq, type);
if (!qirq) {
return NULL;
}
diff --git a/hw/spapr.h b/hw/spapr.h
index a41641fdde..11160b02da 100644
--- a/hw/spapr.h
+++ b/hw/spapr.h
@@ -286,7 +286,18 @@ void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn);
target_ulong spapr_hypercall(CPUPPCState *env, target_ulong opcode,
target_ulong *args);
-qemu_irq spapr_allocate_irq(uint32_t hint, uint32_t *irq_num);
+qemu_irq spapr_allocate_irq(uint32_t hint, uint32_t *irq_num,
+ enum xics_irq_type type);
+
+static inline qemu_irq spapr_allocate_msi(uint32_t hint, uint32_t *irq_num)
+{
+ return spapr_allocate_irq(hint, irq_num, XICS_MSI);
+}
+
+static inline qemu_irq spapr_allocate_lsi(uint32_t hint, uint32_t *irq_num)
+{
+ return spapr_allocate_irq(hint, irq_num, XICS_LSI);
+}
static inline uint32_t rtas_ld(target_ulong phys, int n)
{
diff --git a/hw/spapr_pci.c b/hw/spapr_pci.c
index c06afacbb2..233250fac6 100644
--- a/hw/spapr_pci.c
+++ b/hw/spapr_pci.c
@@ -190,7 +190,7 @@ static int spapr_phb_init(SysBusDevice *s)
qemu_irq qirq;
uint32_t num;
- qirq = spapr_allocate_irq(0, &num);
+ qirq = spapr_allocate_lsi(0, &num);
if (!qirq) {
return -1;
}
diff --git a/hw/spapr_vio.c b/hw/spapr_vio.c
index 2fb3cee266..dbf5a9017e 100644
--- a/hw/spapr_vio.c
+++ b/hw/spapr_vio.c
@@ -670,7 +670,7 @@ static int spapr_vio_busdev_init(DeviceState *qdev)
dev->qdev.id = id;
}
- dev->qirq = spapr_allocate_irq(dev->vio_irq_num, &dev->vio_irq_num);
+ dev->qirq = spapr_allocate_msi(dev->vio_irq_num, &dev->vio_irq_num);
if (!dev->qirq) {
return -1;
}
diff --git a/hw/xics.c b/hw/xics.c
index f7963f3096..668a0d6484 100644
--- a/hw/xics.c
+++ b/hw/xics.c
@@ -132,9 +132,9 @@ static void icp_eoi(struct icp_state *icp, int server, uint32_t xirr)
{
struct icp_server_state *ss = icp->ss + server;
- ics_eoi(icp->ics, xirr & XISR_MASK);
/* Send EOI -> ICS */
ss->xirr = (ss->xirr & ~CPPR_MASK) | (xirr & CPPR_MASK);
+ ics_eoi(icp->ics, xirr & XISR_MASK);
if (!XISR(ss)) {
icp_resend(icp, server);
}
@@ -165,8 +165,9 @@ struct ics_irq_state {
int server;
uint8_t priority;
uint8_t saved_priority;
- /* int pending:1; */
- /* int presented:1; */
+ enum xics_irq_type type;
+ int asserted:1;
+ int sent:1;
int rejected:1;
int masked_pending:1;
};
@@ -185,9 +186,32 @@ static int ics_valid_irq(struct ics_state *ics, uint32_t nr)
&& (nr < (ics->offset + ics->nr_irqs));
}
-static void ics_set_irq_msi(void *opaque, int srcno, int val)
+static void resend_msi(struct ics_state *ics, int srcno)
+{
+ struct ics_irq_state *irq = ics->irqs + srcno;
+
+ /* FIXME: filter by server#? */
+ if (irq->rejected) {
+ irq->rejected = 0;
+ if (irq->priority != 0xff) {
+ icp_irq(ics->icp, irq->server, srcno + ics->offset,
+ irq->priority);
+ }
+ }
+}
+
+static void resend_lsi(struct ics_state *ics, int srcno)
+{
+ struct ics_irq_state *irq = ics->irqs + srcno;
+
+ if ((irq->priority != 0xff) && irq->asserted && !irq->sent) {
+ irq->sent = 1;
+ icp_irq(ics->icp, irq->server, srcno + ics->offset, irq->priority);
+ }
+}
+
+static void set_irq_msi(struct ics_state *ics, int srcno, int val)
{
- struct ics_state *ics = (struct ics_state *)opaque;
struct ics_irq_state *irq = ics->irqs + srcno;
if (val) {
@@ -200,71 +224,108 @@ static void ics_set_irq_msi(void *opaque, int srcno, int val)
}
}
-static void ics_reject_msi(struct ics_state *ics, int nr)
+static void set_irq_lsi(struct ics_state *ics, int srcno, int val)
{
- struct ics_irq_state *irq = ics->irqs + nr - ics->offset;
+ struct ics_irq_state *irq = ics->irqs + srcno;
- irq->rejected = 1;
+ irq->asserted = val;
+ resend_lsi(ics, srcno);
}
-static void ics_resend_msi(struct ics_state *ics)
+static void ics_set_irq(void *opaque, int srcno, int val)
{
- int i;
+ struct ics_state *ics = (struct ics_state *)opaque;
+ struct ics_irq_state *irq = ics->irqs + srcno;
- for (i = 0; i < ics->nr_irqs; i++) {
- struct ics_irq_state *irq = ics->irqs + i;
+ if (irq->type == XICS_LSI) {
+ set_irq_lsi(ics, srcno, val);
+ } else {
+ set_irq_msi(ics, srcno, val);
+ }
+}
- /* FIXME: filter by server#? */
- if (irq->rejected) {
- irq->rejected = 0;
- if (irq->priority != 0xff) {
- icp_irq(ics->icp, irq->server, i + ics->offset, irq->priority);
- }
- }
+static void write_xive_msi(struct ics_state *ics, int srcno)
+{
+ struct ics_irq_state *irq = ics->irqs + srcno;
+
+ if (!irq->masked_pending || (irq->priority == 0xff)) {
+ return;
}
+
+ irq->masked_pending = 0;
+ icp_irq(ics->icp, irq->server, srcno + ics->offset, irq->priority);
}
-static void ics_write_xive_msi(struct ics_state *ics, int nr, int server,
- uint8_t priority)
+static void write_xive_lsi(struct ics_state *ics, int srcno)
{
- struct ics_irq_state *irq = ics->irqs + nr - ics->offset;
+ resend_lsi(ics, srcno);
+}
+
+static void ics_write_xive(struct ics_state *ics, int nr, int server,
+ uint8_t priority)
+{
+ int srcno = nr - ics->offset;
+ struct ics_irq_state *irq = ics->irqs + srcno;
irq->server = server;
irq->priority = priority;
- if (!irq->masked_pending || (priority == 0xff)) {
- return;
+ if (irq->type == XICS_LSI) {
+ write_xive_lsi(ics, srcno);
+ } else {
+ write_xive_msi(ics, srcno);
}
-
- irq->masked_pending = 0;
- icp_irq(ics->icp, server, nr, priority);
}
static void ics_reject(struct ics_state *ics, int nr)
{
- ics_reject_msi(ics, nr);
+ struct ics_irq_state *irq = ics->irqs + nr - ics->offset;
+
+ irq->rejected = 1; /* Irrelevant but harmless for LSI */
+ irq->sent = 0; /* Irrelevant but harmless for MSI */
}
static void ics_resend(struct ics_state *ics)
{
- ics_resend_msi(ics);
+ int i;
+
+ for (i = 0; i < ics->nr_irqs; i++) {
+ struct ics_irq_state *irq = ics->irqs + i;
+
+ /* FIXME: filter by server#? */
+ if (irq->type == XICS_LSI) {
+ resend_lsi(ics, i);
+ } else {
+ resend_msi(ics, i);
+ }
+ }
}
static void ics_eoi(struct ics_state *ics, int nr)
{
+ int srcno = nr - ics->offset;
+ struct ics_irq_state *irq = ics->irqs + srcno;
+
+ if (irq->type == XICS_LSI) {
+ irq->sent = 0;
+ }
}
/*
* Exported functions
*/
-qemu_irq xics_find_qirq(struct icp_state *icp, int irq)
+qemu_irq xics_assign_irq(struct icp_state *icp, int irq,
+ enum xics_irq_type type)
{
if ((irq < icp->ics->offset)
|| (irq >= (icp->ics->offset + icp->ics->nr_irqs))) {
return NULL;
}
+ assert((type == XICS_MSI) || (type == XICS_LSI));
+
+ icp->ics->irqs[irq - icp->ics->offset].type = type;
return icp->ics->qirqs[irq - icp->ics->offset];
}
@@ -332,7 +393,7 @@ static void rtas_set_xive(sPAPREnvironment *spapr, uint32_t token,
return;
}
- ics_write_xive_msi(ics, nr, server, priority);
+ ics_write_xive(ics, nr, server, priority);
rtas_st(rets, 0, 0); /* Success */
}
@@ -477,7 +538,7 @@ struct icp_state *xics_system_init(int nr_irqs)
ics->irqs[i].saved_priority = 0xff;
}
- ics->qirqs = qemu_allocate_irqs(ics_set_irq_msi, ics, nr_irqs);
+ ics->qirqs = qemu_allocate_irqs(ics_set_irq, ics, nr_irqs);
spapr_register_hypercall(H_CPPR, h_cppr);
spapr_register_hypercall(H_IPI, h_ipi);
diff --git a/hw/xics.h b/hw/xics.h
index 83c1182598..208015939c 100644
--- a/hw/xics.h
+++ b/hw/xics.h
@@ -31,7 +31,13 @@
struct icp_state;
-qemu_irq xics_find_qirq(struct icp_state *icp, int irq);
+enum xics_irq_type {
+ XICS_MSI, /* Message-signalled (edge) interrupt */
+ XICS_LSI, /* Level-signalled interrupt */
+};
+
+qemu_irq xics_assign_irq(struct icp_state *icp, int irq,
+ enum xics_irq_type type);
struct icp_state *xics_system_init(int nr_irqs);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 19:24:14 +0000