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[SRU,kinetic/linux-aws,02/20] UBUNTU: SAUCE: xen/manage: introduce helper function to know the on-going suspend mode

Message ID 20220817085150.2078055-4-gerald.yang@canonical.com
State New
Headers show
Series UBUNTU: SAUCE: PM: Hibernate: Enable Hibernation for Xen Based Instance Types | expand

Commit Message

Gerald Yang Aug. 17, 2022, 8:51 a.m. UTC 
From: Munehisa Kamata <kamatam@amazon.com>

BugLink: https://bugs.launchpad.net/bugs/1968062

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@amazon.com>
Signed-off-by: Anchal Agarwal <anchalag@amazon.com>
Reviewed-by: Alakesh Haloi <alakeshh@amazon.com>
Reviewed-by: Sebastian Biemueller <sbiemue@amazon.com>
Reviewed-by: Munehisa Kamata <kamatam@amazon.com>
Reviewed-by: Eduardo Valentin <eduval@amazon.com>
CR: https://cr.amazon.com/r/8273190/
(cherry picked from commit 7d04745f53231fcfc934cea2b5ef3cf4f80fb7d4 amazon-5.15.y/mainline)
Signed-off-by: Gerald Yang <gerald.yang@canonical.com>
Signed-off-by: Matthew Ruffell <matthew.ruffell@canonical.com>
---
 drivers/xen/manage.c  | 15 +++++++++++++++
 include/xen/xen-ops.h |  4 ++++
 2 files changed, 19 insertions(+)
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Patch

diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index 5e5bf218f9a7..82e46ff87699 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -51,6 +51,21 @@  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 80546960f8b7..d37328f2af0f 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -40,6 +40,10 @@  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;
 
 #if defined(CONFIG_XEN_PV)