[PATCH 14/18] Drivers: hv: vmbus: Define APIs to manipulate the event page

From: kys
Date: Fri Dec 30 2016 - 14:40:51 EST


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

As part of cleaning up architecture specific code, define APIs
to manipulate the event page.

Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
---
arch/x86/include/asm/mshyperv.h | 3 +++
drivers/hv/hv.c | 8 ++++----
2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index 1e75141..2ea7e16 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -143,6 +143,9 @@ static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type)
#define hv_get_simp(val) rdmsrl(HV_X64_MSR_SIMP, val)
#define hv_set_simp(val) wrmsrl(HV_X64_MSR_SIMP, val)

+#define hv_get_siefp(val) rdmsrl(HV_X64_MSR_SIEFP, val)
+#define hv_set_siefp(val) wrmsrl(HV_X64_MSR_SIEFP, 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 6088442d..0a1da5d 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -276,12 +276,12 @@ int hv_synic_init(unsigned int cpu)
hv_set_simp(simp.as_uint64);

/* Setup the Synic's event page */
- rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64);
+ hv_get_siefp(siefp.as_uint64);
siefp.siefp_enabled = 1;
siefp.base_siefp_gpa = virt_to_phys(hv_context.synic_event_page[cpu])
>> PAGE_SHIFT;

- wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64);
+ hv_set_siefp(siefp.as_uint64);

/* Setup the shared SINT. */
rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
@@ -398,11 +398,11 @@ int hv_synic_cleanup(unsigned int cpu)

hv_set_simp(simp.as_uint64);

- rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64);
+ hv_get_siefp(siefp.as_uint64);
siefp.siefp_enabled = 0;
siefp.base_siefp_gpa = 0;

- wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64);
+ hv_set_siefp(siefp.as_uint64);

/* Disable the global synic bit */
rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64);
--
1.7.4.1