linux-kernel - [PATCH 15/18] Drivers: hv: vmbus: Define APIs to manipulate the synthetic interrupt controller

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Message-Id: <1483133772-29776-15-git-send-email-kys@exchange.microsoft.com>
Date:   Fri, 30 Dec 2016 13:36:09 -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 15/18] Drivers: hv: vmbus: Define APIs to manipulate the synthetic interrupt controller

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

As part of cleaning up architecture specific code, define APIs
to manipulate the interrupt controller state.

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 2ea7e16..1ea19a5 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -146,6 +146,9 @@ static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type)
 #define hv_get_siefp(val) rdmsrl(HV_X64_MSR_SIEFP, val)
 #define hv_set_siefp(val) wrmsrl(HV_X64_MSR_SIEFP, val)
 
+#define hv_get_synic_state(val) rdmsrl(HV_X64_MSR_SCONTROL, val)
+#define hv_set_synic_state(val) wrmsrl(HV_X64_MSR_SCONTROL, 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 0a1da5d..3c9a819 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -294,10 +294,10 @@ int hv_synic_init(unsigned int cpu)
 	wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
 
 	/* Enable the global synic bit */
-	rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64);
+	hv_get_synic_state(sctrl.as_uint64);
 	sctrl.enable = 1;
 
-	wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64);
+	hv_set_synic_state(sctrl.as_uint64);
 
 	hv_context.synic_initialized = true;
 
@@ -405,9 +405,9 @@ int hv_synic_cleanup(unsigned int cpu)
 	hv_set_siefp(siefp.as_uint64);
 
 	/* Disable the global synic bit */
-	rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64);
+	hv_get_synic_state(sctrl.as_uint64);
 	sctrl.enable = 0;
-	wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64);
+	hv_set_synic_state(sctrl.as_uint64);
 
 	return 0;
 }
-- 
1.7.4.1