Allow user to select who sends ipis and with which irq,
rather than just always sending irq=0 from cpu0.
Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
---
v4: improve structure and make sure spurious checking is
done even when the sender isn't cpu0
v2: actually check that the irq received was the irq sent,
and (for gicv2) that the sender is the expected one.
---
arm/gic.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++-----------------
1 file changed, 73 insertions(+), 26 deletions(-)
diff --git a/arm/gic.c b/arm/gic.c
index d98ca6b9efd5..8e50bc1b35e0 100644
--- a/arm/gic.c
+++ b/arm/gic.c
@@ -11,6 +11,7 @@
* This work is licensed under the terms of the GNU LGPL, version 2.
*/
#include <libcflat.h>
+#include <util.h>
#include <asm/setup.h>
#include <asm/processor.h>
#include <asm/gic.h>
@@ -34,6 +35,8 @@ static struct gic *gic;
static int gic_version;
static int acked[NR_CPUS], spurious[NR_CPUS];
static cpumask_t ready;
+static int sender;
+static u32 irq;
static void nr_cpu_check(int nr)
{
@@ -86,7 +89,16 @@ static void check_acked(cpumask_t *mask)
static u32 gicv2_read_iar(void)
{
- return readl(gicv2_cpu_base() + GIC_CPU_INTACK);
+ u32 iar = readl(gicv2_cpu_base() + GIC_CPU_INTACK);
+ int src = (iar >> 10) & 7;
+
+ if (src != sender) {
+ report("cpu%d received IPI from unexpected source cpu%d "
+ "(expected cpu%d)",
+ false, smp_processor_id(), src, sender);
+ }
+
+ return iar;
}
static u32 gicv2_irqnr(u32 iar)
@@ -111,9 +123,15 @@ static void ipi_handler(struct pt_regs *regs __unused)
if (irqnr != GICC_INT_SPURIOUS) {
gic->write_eoi(irqstat);
- smp_rmb(); /* pairs with wmb in ipi_test functions */
- ++acked[smp_processor_id()];
- smp_wmb(); /* pairs with rmb in check_acked */
+ if (irqnr == irq) {
+ smp_rmb(); /* pairs with wmb in ipi_test functions */
+ ++acked[smp_processor_id()];
+ smp_wmb(); /* pairs with rmb in check_acked */
+ } else {
+ report("cpu%d received unexpected irq %u "
+ "(expected %u)",
+ false, smp_processor_id(), irqnr, irq);
+ }
} else {
++spurious[smp_processor_id()];
smp_wmb();
@@ -122,19 +140,19 @@ static void ipi_handler(struct pt_regs *regs __unused)
static void gicv2_ipi_send_self(void)
{
- writel(2 << 24, gicv2_dist_base() + GIC_DIST_SOFTINT);
+ writel(2 << 24 | irq, gicv2_dist_base() + GIC_DIST_SOFTINT);
}
static void gicv2_ipi_send_tlist(cpumask_t *mask)
{
u8 tlist = (u8)cpumask_bits(mask)[0];
- writel(tlist << 16, gicv2_dist_base() + GIC_DIST_SOFTINT);
+ writel(tlist << 16 | irq, gicv2_dist_base() + GIC_DIST_SOFTINT);
}
static void gicv2_ipi_send_broadcast(void)
{
- writel(1 << 24, gicv2_dist_base() + GIC_DIST_SOFTINT);
+ writel(1 << 24 | irq, gicv2_dist_base() + GIC_DIST_SOFTINT);
}
#define ICC_SGI1R_AFFINITY_1_SHIFT 16
@@ -200,7 +218,7 @@ static void gicv3_ipi_send_tlist(cpumask_t *mask)
/* Send the IPIs for the target list of this cluster */
sgi1r = (MPIDR_TO_SGI_AFFINITY(cluster_id, 3) |
MPIDR_TO_SGI_AFFINITY(cluster_id, 2) |
- /* irq << 24 | */
+ irq << 24 |
MPIDR_TO_SGI_AFFINITY(cluster_id, 1) |
tlist);
@@ -222,7 +240,7 @@ static void gicv3_ipi_send_self(void)
static void gicv3_ipi_send_broadcast(void)
{
- gicv3_write_sgi1r(1ULL << 40);
+ gicv3_write_sgi1r(1ULL << 40 | irq << 24);
isb();
}
@@ -234,7 +252,7 @@ static void ipi_test_self(void)
memset(acked, 0, sizeof(acked));
smp_wmb();
cpumask_clear(&mask);
- cpumask_set_cpu(0, &mask);
+ cpumask_set_cpu(smp_processor_id(), &mask);
gic->ipi.send_self();
check_acked(&mask);
report_prefix_pop();
@@ -249,7 +267,7 @@ static void ipi_test_smp(void)
memset(acked, 0, sizeof(acked));
smp_wmb();
cpumask_copy(&mask, &cpu_present_mask);
- for (i = 0; i < nr_cpus; i += 2)
+ for (i = smp_processor_id() & 1; i < nr_cpus; i += 2)
cpumask_clear_cpu(i, &mask);
gic->ipi.send_tlist(&mask);
check_acked(&mask);
@@ -259,7 +277,7 @@ static void ipi_test_smp(void)
memset(acked, 0, sizeof(acked));
smp_wmb();
cpumask_copy(&mask, &cpu_present_mask);
- cpumask_clear_cpu(0, &mask);
+ cpumask_clear_cpu(smp_processor_id(), &mask);
gic->ipi.send_broadcast();
check_acked(&mask);
report_prefix_pop();
@@ -276,6 +294,27 @@ static void ipi_enable(void)
local_irq_enable();
}
+static void ipi_send(void)
+{
+ int cpu;
+
+ ipi_enable();
+ wait_on_ready();
+ ipi_test_self();
+ ipi_test_smp();
+
+ smp_rmb();
+ for_each_present_cpu(cpu) {
+ if (spurious[cpu]) {
+ printf("ipi: WARN: cpu%d got %d spurious "
+ "interrupts\n",
+ spurious[cpu], smp_processor_id());
+ }
+ }
+
+ exit(report_summary());
+}
+
static void ipi_recv(void)
{
ipi_enable();
@@ -284,6 +323,14 @@ static void ipi_recv(void)
wfi();
}
+static void ipi_test(void)
+{
+ if (smp_processor_id() == sender)
+ ipi_send();
+ else
+ ipi_recv();
+}
+
struct gic gicv2 = {
.ipi = {
.enable = gicv2_enable_defaults,
@@ -337,30 +384,30 @@ int main(int argc, char **argv)
report_prefix_pop();
} else if (!strcmp(argv[1], "ipi")) {
+ int off, i = 1;
+ long val;
report_prefix_push(argv[1]);
nr_cpu_check(2);
- for_each_present_cpu(cpu) {
- if (cpu == 0)
+ while (--argc != 1) {
+ off = parse_keyval(argv[++i], &val);
+ if (off == -1)
continue;
- smp_boot_secondary(cpu, ipi_recv);
+ argv[i][off] = '\0';
+ if (strcmp(argv[i], "sender") == 0)
+ sender = val;
+ else if (strcmp(argv[i], "irq") == 0)
+ irq = val;
}
- ipi_enable();
- wait_on_ready();
- ipi_test_self();
- ipi_test_smp();
- smp_rmb();
for_each_present_cpu(cpu) {
- if (spurious[cpu]) {
- printf("ipi: WARN: cpu%d got %d spurious "
- "interrupts\n",
- spurious[cpu], smp_processor_id());
- }
+ if (cpu == 0)
+ continue;
+ smp_boot_secondary(cpu, ipi_test);
}
- report_prefix_pop();
+ ipi_test();
} else {
report_abort("Unknown subtest '%s'", argv[1]);
--
2.7.4
--
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