linux-kernel - [PATCH v3 4/5] Sysfs: Export VMCSINFO via sysfs

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Date:	Wed, 27 Jun 2012 16:54:54 +0800
From:	Yanfei Zhang <zhangyanfei@...fujitsu.com>
To:	Avi Kivity <avi@...hat.com>, mtosatti@...hat.com
CC:	ebiederm@...ssion.com, luto@....edu,
	Joerg Roedel <joerg.roedel@....com>, dzickus@...hat.com,
	paul.gortmaker@...driver.com, ludwig.nussel@...e.de,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	kexec@...ts.infradead.org, Greg KH <gregkh@...uxfoundation.org>
Subject: [PATCH v3 4/5] Sysfs: Export VMCSINFO via sysfs

This patch export offsets of fields via /sys/devices/cpu/vmcs/.
Individual offsets are contained in subfiles named by the filed's
encoding, e.g.: /sys/devices/cpu/vmcs/0800

Signed-off-by: zhangyanfei <zhangyanfei@...fujitsu.com>
---
 drivers/base/core.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 346be8b..dd05ee7 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -26,6 +26,7 @@
 #include <linux/async.h>
 #include <linux/pm_runtime.h>
 #include <linux/netdevice.h>
+#include <asm/vmcsinfo.h>
 
 #include "base.h"
 #include "power/power.h"
@@ -1038,6 +1039,11 @@ int device_add(struct device *dev)
 	error = dpm_sysfs_add(dev);
 	if (error)
 		goto DPMError;
+#if defined(CONFIG_KVM_INTEL) || defined(CONFIG_KVM_INTEL_MODULE)
+	error = vmcs_sysfs_add(dev);
+	if (error)
+		goto VMCSError;
+#endif
 	device_pm_add(dev);
 
 	/* Notify clients of device addition.  This call must come
@@ -1069,6 +1075,10 @@ int device_add(struct device *dev)
 done:
 	put_device(dev);
 	return error;
+#if defined(CONFIG_KVM_INTEL) || defined(CONFIG_KVM_INTEL_MODULE)
+ VMCSError:
+	dpm_sysfs_remove(dev);
+#endif
  DPMError:
 	bus_remove_device(dev);
  BusError:
@@ -1171,6 +1181,9 @@ void device_del(struct device *dev)
 		blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
 					     BUS_NOTIFY_DEL_DEVICE, dev);
 	device_pm_remove(dev);
+#if defined(CONFIG_KVM_INTEL) || defined(CONFIG_KVM_INTEL_MODULE)
+	vmcs_sysfs_remove(dev);
+#endif
 	dpm_sysfs_remove(dev);
 	if (parent)
 		klist_del(&dev->p->knode_parent);
-- 
1.7.1

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