[PATCH 17/18] Drivers: hv: vmbus: Define an APIs to manage interrupt state

From: kys
Date: Fri Dec 30 2016 - 14:41:59 EST


From: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>

As part of cleaning up architecture specific code, define APIs
to manage interrupt state.

Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
---
arch/x86/include/asm/mshyperv.h | 3 +++
drivers/hv/hv.c | 12 ++++++++----
2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index 2d40bfc..42505d1 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -151,6 +151,9 @@ static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type)

#define hv_get_vp_index(index) rdmsrl(HV_X64_MSR_VP_INDEX, index)

+#define hv_get_synint_state(int_num, val) rdmsrl(int_num, val)
+#define hv_set_synint_state(int_num, val) wrmsrl(int_num, val)
+
void hyperv_callback_vector(void);
#ifdef CONFIG_TRACING
#define trace_hyperv_callback_vector hyperv_callback_vector
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 9b2630b..df55257 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -284,14 +284,16 @@ int hv_synic_init(unsigned int cpu)
hv_set_siefp(siefp.as_uint64);

/* Setup the shared SINT. */
- rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
+ hv_get_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,
+ shared_sint.as_uint64);

shared_sint.as_uint64 = 0;
shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR;
shared_sint.masked = false;
shared_sint.auto_eoi = true;

- wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
+ hv_set_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,
+ shared_sint.as_uint64);

/* Enable the global synic bit */
hv_get_synic_state(sctrl.as_uint64);
@@ -384,13 +386,15 @@ int hv_synic_cleanup(unsigned int cpu)
hv_ce_shutdown(hv_context.clk_evt[cpu]);
}

- rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
+ hv_get_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,
+ shared_sint.as_uint64);

shared_sint.masked = 1;

/* Need to correctly cleanup in the case of SMP!!! */
/* Disable the interrupt */
- wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
+ hv_set_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,
+ shared_sint.as_uint64);

hv_get_simp(simp.as_uint64);
simp.simp_enabled = 0;
--
1.7.4.1