Add hooks to enable/disable a per-CPU IRQ for VMbus. These hooks
are in the architecture independent setup and shutdown paths for
Hyper-V, and are needed by Linux guests on Hyper-V on ARM64. The
x86/x64 implementation is null because VMbus interrupts on x86/x64
don't use an IRQ.
Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
---
arch/x86/include/asm/mshyperv.h | 4 ++++
drivers/hv/hv.c | 2 ++
2 files changed, 6 insertions(+)
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index f4138ae..583e1ce 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -56,6 +56,10 @@ typedef int (*hyperv_fill_flush_list_func)(
#endif
void hyperv_vector_handler(struct pt_regs *regs);
+/* On x86/x64, there isn't a real IRQ to be enabled/disable */
+static inline void hv_enable_vmbus_irq(void) {}
+static inline void hv_disable_vmbus_irq(void) {}
+
/*
* Routines for stimer0 Direct Mode handling.
* On x86/x64, there are no percpu actions to take.
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 6188fb7..86f5435 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -180,6 +180,7 @@ int hv_synic_init(unsigned int cpu)
hv_set_siefp(siefp.as_uint64);
/* Setup the shared SINT. */
+ hv_enable_vmbus_irq();
hv_get_synint_state(VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR;
@@ -272,6 +273,7 @@ int hv_synic_cleanup(unsigned int cpu)
/* Disable the global synic bit */
sctrl.enable = 0;
hv_set_synic_state(sctrl.as_uint64);
+ hv_disable_vmbus_irq();
return 0;
}
--
1.8.3.1
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