Drivers: hv: vmbus: Use the new infrastructure for delivering VMBUS interrupts
Use the infrastructure for delivering VMBUS interrupts using a
special vector. With this patch, we can now properly handle
the VMBUS interrupts that can be delivered on any CPU. Also,
turn on interrupt load balancing as well.
This patch requires the infrastructure that was implemented in the patch:
X86: Handle Hyper-V vmbus interrupts as special hypervisor interrupts
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 53a8600..ff1be16 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -318,7 +318,7 @@
return 0;
}
cur_cpu = (++next_vp % max_cpus);
- return 0;
+ return cur_cpu;
}
/*
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 1c5481d..7311589 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -272,7 +272,7 @@
* retrieve the initialized message and event pages. Otherwise, we create and
* initialize the message and event pages.
*/
-void hv_synic_init(void *irqarg)
+void hv_synic_init(void *arg)
{
u64 version;
union hv_synic_simp simp;
@@ -281,7 +281,6 @@
union hv_synic_scontrol sctrl;
u64 vp_index;
- u32 irq_vector = *((u32 *)(irqarg));
int cpu = smp_processor_id();
if (!hv_context.hypercall_page)
@@ -335,7 +334,7 @@
rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
shared_sint.as_uint64 = 0;
- shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */
+ shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR;
shared_sint.masked = false;
shared_sint.auto_eoi = true;
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index cf19dfa..bf421e0 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -36,6 +36,7 @@
#include <linux/kernel_stat.h>
#include <asm/hyperv.h>
#include <asm/hypervisor.h>
+#include <asm/mshyperv.h>
#include "hyperv_vmbus.h"
@@ -528,7 +529,6 @@
static int vmbus_bus_init(int irq)
{
int ret;
- unsigned int vector;
/* Hypervisor initialization...setup hypercall page..etc */
ret = hv_init();
@@ -558,13 +558,16 @@
*/
irq_set_handler(irq, vmbus_flow_handler);
- vector = IRQ0_VECTOR + irq;
+ /*
+ * Register our interrupt handler.
+ */
+ hv_register_vmbus_handler(irq, vmbus_isr);
/*
- * Notify the hypervisor of our irq and
+ * Initialize the per-cpu interrupt state and
* connect to the host.
*/
- on_each_cpu(hv_synic_init, (void *)&vector, 1);
+ on_each_cpu(hv_synic_init, NULL, 1);
ret = vmbus_connect();
if (ret)
goto err_irq;