This patch adds tracing / debugging calls to the XICS interrupt controller
implementation used on the pseries machine.
Signed-off-by: Ben Herrenschmidt <b...@kernel.crashing.org>
Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
---
hw/xics.c | 23 ++++++++++++++++++++---
trace-events | 13 +++++++++++++
2 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/hw/xics.c b/hw/xics.c
index b8887cd..33f99c7 100644
--- a/hw/xics.c
+++ b/hw/xics.c
@@ -26,6 +26,7 @@
*/
#include "hw.h"
+#include "trace.h"
#include "hw/spapr.h"
#include "hw/xics.h"
@@ -66,6 +67,8 @@ static void icp_check_ipi(struct icp_state *icp, int server)
return;
}
+ trace_xics_icp_check_ipi(server, ss->mfrr);
+
if (XISR(ss)) {
ics_reject(icp->ics, XISR(ss));
}
@@ -120,11 +123,13 @@ static void icp_set_mfrr(struct icp_state *icp, int
server, uint8_t mfrr)
static uint32_t icp_accept(struct icp_server_state *ss)
{
- uint32_t xirr;
+ uint32_t xirr = ss->xirr;
qemu_irq_lower(ss->output);
- xirr = ss->xirr;
ss->xirr = ss->pending_priority << 24;
+
+ trace_xics_icp_accept(xirr, ss->xirr);
+
return xirr;
}
@@ -134,6 +139,7 @@ static void icp_eoi(struct icp_state *icp, int server,
uint32_t xirr)
/* Send EOI -> ICS */
ss->xirr = (ss->xirr & ~CPPR_MASK) | (xirr & CPPR_MASK);
+ trace_xics_icp_eoi(server, xirr, ss->xirr);
ics_eoi(icp->ics, xirr & XISR_MASK);
if (!XISR(ss)) {
icp_resend(icp, server);
@@ -144,6 +150,8 @@ static void icp_irq(struct icp_state *icp, int server, int
nr, uint8_t priority)
{
struct icp_server_state *ss = icp->ss + server;
+ trace_xics_icp_irq(server, nr, priority);
+
if ((priority >= CPPR(ss))
|| (XISR(ss) && (ss->pending_priority <= priority))) {
ics_reject(icp->ics, nr);
@@ -153,6 +161,7 @@ static void icp_irq(struct icp_state *icp, int server, int
nr, uint8_t priority)
}
ss->xirr = (ss->xirr & ~XISR_MASK) | (nr & XISR_MASK);
ss->pending_priority = priority;
+ trace_xics_icp_raise(ss->xirr, ss->pending_priority);
qemu_irq_raise(ss->output);
}
}
@@ -217,10 +226,12 @@ static void set_irq_msi(struct ics_state *ics, int srcno,
int val)
{
struct ics_irq_state *irq = ics->irqs + srcno;
+ trace_xics_set_irq_msi(srcno, srcno + ics->offset);
+
if (val) {
if (irq->priority == 0xff) {
irq->status |= XICS_STATUS_MASKED_PENDING;
- /* masked pending */ ;
+ trace_xics_masked_pending();
} else {
icp_irq(ics->icp, irq->server, srcno + ics->offset, irq->priority);
}
@@ -231,6 +242,7 @@ static void set_irq_lsi(struct ics_state *ics, int srcno,
int val)
{
struct ics_irq_state *irq = ics->irqs + srcno;
+ trace_xics_set_irq_lsi(srcno, srcno + ics->offset);
if (val) {
irq->status |= XICS_STATUS_ASSERTED;
} else {
@@ -279,6 +291,8 @@ static void ics_write_xive(struct ics_state *ics, int nr,
int server,
irq->priority = priority;
irq->saved_priority = saved_priority;
+ trace_xics_ics_write_xive(nr, srcno, server, priority);
+
if (irq->lsi) {
write_xive_lsi(ics, srcno);
} else {
@@ -290,6 +304,7 @@ static void ics_reject(struct ics_state *ics, int nr)
{
struct ics_irq_state *irq = ics->irqs + nr - ics->offset;
+ trace_xics_ics_reject(nr, nr - ics->offset);
irq->status |= XICS_STATUS_REJECTED; /* Irrelevant but harmless for LSI */
irq->status &= ~XICS_STATUS_SENT; /* Irrelevant but harmless for MSI */
}
@@ -315,6 +330,8 @@ static void ics_eoi(struct ics_state *ics, int nr)
int srcno = nr - ics->offset;
struct ics_irq_state *irq = ics->irqs + srcno;
+ trace_xics_ics_eoi(nr);
+
if (irq->lsi) {
irq->status &= ~XICS_STATUS_SENT;
}
diff --git a/trace-events b/trace-events
index 6c6cbf1..e280fba 100644
--- a/trace-events
+++ b/trace-events
@@ -1022,3 +1022,16 @@ spapr_pci_rtas_ibm_change_msi(unsigned func, unsigned
req) "func %u, requested %
spapr_pci_rtas_ibm_query_interrupt_source_number(unsigned ioa, unsigned intr)
"queries for #%u, IRQ%u"
spapr_pci_msi_write(uint64_t addr, uint64_t data, uint32_t dt_irq)
"@%"PRIx64"<=%"PRIx64" IRQ %u"
spapr_pci_lsi_set(const char *busname, int pin, uint32_t irq) "%s PIN%d IRQ %u"
+
+# hw/xics.c
+xics_icp_check_ipi(int server, uint8_t mfrr) "CPU %d can take IPI mfrr=%#x"
+xics_icp_accept(uint32_t old_xirr, uint32_t new_xirr) "icp_accept: XIRR
%#"PRIx32"->%#"PRIx32
+xics_icp_eoi(int server, uint32_t xirr, uint32_t new_xirr) "icp_eoi: server %d
given XIRR %#"PRIx32" new XIRR %#"PRIx32
+xics_icp_irq(int server, int nr, uint8_t priority) "cpu %d trying to deliver
irq %#"PRIx32" priority %#x"
+xics_icp_raise(uint32_t xirr, uint8_t pending_priority) "raising IRQ new
XIRR=%#x new pending priority=%#x"
+xics_set_irq_msi(int srcno, int nr) "set_irq_msi: srcno %d [irq %#x]"
+xics_masked_pending(void) "set_irq_msi: masked pending"
+xics_set_irq_lsi(int srcno, int nr) "set_irq_lsi: srcno %d [irq %#x]"
+xics_ics_write_xive(int nr, int srcno, int server, uint8_t priority)
"ics_write_xive: irq %#x [src %d] server %#x prio %#x"
+xics_ics_reject(int nr, int srcno) "reject irq %#x [src %d]"
+xics_ics_eoi(int nr) "ics_eoi: irq %#x"
\ No newline at end of file
--
1.7.10.4
