[xen master] x86/hvm: process softirq while saving/loading entries

[patchbot@xxxxxxx]

commit e0daa27e9511f7c9ce6e2be7655231e112d69920
Author:     Roger Pau Monné <roger.pau@xxxxxxxxxx>
AuthorDate: Fri Oct 30 14:28:03 2020 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Oct 30 14:28:03 2020 +0100

    x86/hvm: process softirq while saving/loading entries
    
    On slow systems with sync_console saving or loading the context of big
    guests can cause the watchdog to trigger. Fix this by adding a couple
    of process_pending_softirqs.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/hvm/save.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/xen/arch/x86/hvm/save.c b/xen/arch/x86/hvm/save.c
index a2c56fbc1e..584620985b 100644
--- a/xen/arch/x86/hvm/save.c
+++ b/xen/arch/x86/hvm/save.c
@@ -21,6 +21,7 @@
  */
 
 #include <xen/guest_access.h>
+#include <xen/softirq.h>
 #include <xen/version.h>
 
 #include <asm/hvm/support.h>
@@ -255,6 +256,7 @@ int hvm_save(struct domain *d, hvm_domain_context_t *h)
                            v, i);
                     return -ENODATA;
                 }
+                process_pending_softirqs();
             }
         }
         else
@@ -268,6 +270,7 @@ int hvm_save(struct domain *d, hvm_domain_context_t *h)
                        d->domain_id, i);
                 return -ENODATA;
             }
+            process_pending_softirqs();
         }
     }
 
@@ -341,6 +344,7 @@ int hvm_load(struct domain *d, hvm_domain_context_t *h)
                    d->domain_id, desc->typecode, desc->instance);
             return -1;
         }
+        process_pending_softirqs();
     }
 
     /* Not reached */
--
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