netdev - [RFC PATCH 02/12] xen/manage: introduce helper function to know the on-going suspend mode

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Message-ID: <20180612205619.28156-3-anchalag@amazon.com>
Date:   Tue, 12 Jun 2018 20:56:09 +0000
From:   Anchal Agarwal <anchalag@...zon.com>
To:     <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>,
        <x86@...nel.org>
CC:     <boris.ostrovsky@...cle.com>, <konrad.wilk@...cle.com>,
        <roger.pau@...rix.com>, <netdev@...r.kernel.org>,
        <jgross@...e.com>, <xen-devel@...ts.xenproject.org>,
        <linux-kernel@...r.kernel.org>, <kamatam@...zon.com>,
        <anchalag@...zon.com>, <fllinden@...zon.com>, <vallish@...zon.com>,
        <guruanb@...zon.com>, <eduval@...zon.com>, <rjw@...ysocki.net>,
        <pavel@....cz>, <len.brown@...el.com>, <linux-pm@...r.kernel.org>,
        <cyberax@...zon.com>
Subject: [RFC PATCH 02/12] xen/manage: introduce helper function to know the on-going suspend mode

From: Munehisa Kamata <kamatam@...zon.com>

Introduce simple functions which help to know the on-going suspend mode
so that other Xen-related code can behave differently according to the
current suspend mode.

Signed-off-by: Munehisa Kamata <kamatam@...zon.com>
Signed-off-by: Anchal Agarwal <anchalag@...zon.com>
Reviewed-by: Alakesh Haloi <alakeshh@...zon.com>
Reviewed-by: Sebastian Biemueller <sbiemue@...zon.com>
Reviewed-by: Munehisa Kamata <kamatam@...zon.com>
Reviewed-by: Eduardo Valentin <eduval@...zon.com>
---
 drivers/xen/manage.c  | 15 +++++++++++++++
 include/xen/xen-ops.h |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index 8f9ea87..326631d 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -50,6 +50,21 @@ enum suspend_modes {
 /* Protected by pm_mutex */
 static enum suspend_modes suspend_mode = NO_SUSPEND;
 
+bool xen_suspend_mode_is_xen_suspend(void)
+{
+	return suspend_mode == XEN_SUSPEND;
+}
+
+bool xen_suspend_mode_is_pm_suspend(void)
+{
+	return suspend_mode == PM_SUSPEND;
+}
+
+bool xen_suspend_mode_is_pm_hibernation(void)
+{
+	return suspend_mode == PM_HIBERNATION;
+}
+
 struct suspend_info {
 	int cancelled;
 };
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
index fd23e42..be78f6f 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -39,6 +39,10 @@ u64 xen_steal_clock(int cpu);
 
 int xen_setup_shutdown_event(void);
 
+bool xen_suspend_mode_is_xen_suspend(void);
+bool xen_suspend_mode_is_pm_suspend(void);
+bool xen_suspend_mode_is_pm_hibernation(void);
+
 extern unsigned long *xen_contiguous_bitmap;
 
 #ifdef CONFIG_XEN_PV
-- 
2.7.4