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

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Message-Id: <1483133772-29776-14-git-send-email-kys@exchange.microsoft.com>
Date:   Fri, 30 Dec 2016 13:36:08 -0800
From:   kys@...hange.microsoft.com
To:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com,
        vkuznets@...hat.com, jasowang@...hat.com,
        leann.ogasawara@...onical.com, rkagan@...tuozzo.com,
        x86@...nel.org, tglx@...utronix.de, hpa@...or.com
Cc:     "K. Y. Srinivasan" <kys@...rosoft.com>
Subject: [PATCH 14/18] Drivers: hv: vmbus: Define APIs to manipulate the event page

From: K. Y. Srinivasan <kys@...rosoft.com>

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

Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
---
 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