@@ -61,6 +61,7 @@ extern atomic_t dcpage_flushes_xcall;
extern int sysctl_tsb_ratio;
#endif
+void sunhv_migrate_hvcons_irq(int cpu);
void sun_do_break(void);
extern int stop_a_enabled;
extern int scons_pwroff;
@@ -1444,8 +1444,12 @@ void smp_send_stop(void)
int cpu;
if (tlb_type == hypervisor) {
+ int this_cpu = smp_processor_id();
+
+ sunhv_migrate_hvcons_irq(this_cpu);
+
for_each_online_cpu(cpu) {
- if (cpu == smp_processor_id())
+ if (cpu == this_cpu)
continue;
set_cpu_online(cpu, false);
@@ -398,6 +398,12 @@ static struct uart_driver sunhv_reg = {
static struct uart_port *sunhv_port;
+void sunhv_migrate_hvcons_irq(int cpu)
+{
+ /* Migrate hvcons irq to param cpu */
+ irq_force_affinity(sunhv_port->irq, cpumask_of(cpu));
+}
+
/* Copy 's' into the con_write_page, decoding "\n" into
* "\r\n" along the way. We have to return two lengths
* because the caller needs to know how much to advance
On panic, all other CPUs are stopped except the one which had hit panic. To keep console alive, we need to migrate hvcons irq to panicked CPU. Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com> --- arch/sparc/include/asm/setup.h | 1 + arch/sparc/kernel/smp_64.c | 6 +++++- drivers/tty/serial/sunhv.c | 6 ++++++ 3 files changed, 12 insertions(+), 1 deletions(-)