[Xen-changelog] [xen staging] x86/suspend: Sanity check more properties in enter_state()

[patchbot@xxxxxxx]

commit 87e7b4d5b0e60fe6d224d3074149833cde32334f
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Mon Aug 12 15:14:13 2019 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Aug 28 18:48:44 2019 +0100

    x86/suspend: Sanity check more properties in enter_state()
    
    The logic depends on being run on CPU0, and in IDLE context.  Having this
    explicitly identified allows for simplification of the whole S3 path.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/acpi/power.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/arch/x86/acpi/power.c b/xen/arch/x86/acpi/power.c
index aecc754fdb..d83e8cdd52 100644
--- a/xen/arch/x86/acpi/power.c
+++ b/xen/arch/x86/acpi/power.c
@@ -174,6 +174,8 @@ static int enter_state(u32 state)
         return -EBUSY;
 
     BUG_ON(system_state != SYS_STATE_active);
+    BUG_ON(!is_idle_vcpu(current));
+    BUG_ON(smp_processor_id() != 0);
     system_state = SYS_STATE_suspend;
 
     printk(XENLOG_INFO "Preparing system for ACPI S%d state.\n", state);
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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