[Xen-changelog] [xen staging] x86/smp: don't online cpu if hypervisor_ap_setup fails

[patchbot@xxxxxxx]

commit 0566b53215e450773bfb84e33e4359258f31e45f
Author:     Wei Liu <liuwe@xxxxxxxxxxxxx>
AuthorDate: Wed Jan 29 13:53:53 2020 +0000
Commit:     Wei Liu <liuwe@xxxxxxxxxxxxx>
CommitDate: Wed Feb 5 15:55:02 2020 +0000

    x86/smp: don't online cpu if hypervisor_ap_setup fails
    
    Push hypervisor_ap_setup down to smp_callin.
    
    Take the chance to replace xen_guest with cpu_has_hypervisor.
    
    Signed-off-by: Wei Liu <liuwe@xxxxxxxxxxxxx>
    Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/smpboot.c                 | 10 +++++++---
 xen/include/asm-x86/guest/hypervisor.h |  2 +-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
index c9d1ab4423..93b86a09e9 100644
--- a/xen/arch/x86/smpboot.c
+++ b/xen/arch/x86/smpboot.c
@@ -199,6 +199,13 @@ static void smp_callin(void)
         goto halt;
     }
 
+    if ( cpu_has_hypervisor && (rc = hypervisor_ap_setup()) != 0 )
+    {
+        printk("CPU%d: Failed to initialise hypervisor functions. Not coming 
online.\n", cpu);
+        cpu_error = rc;
+        goto halt;
+    }
+
     if ( (rc = hvm_cpu_up()) != 0 )
     {
         printk("CPU%d: Failed to initialise HVM. Not coming online.\n", cpu);
@@ -371,9 +378,6 @@ void start_secondary(void *unused)
 
     tsx_init(); /* Needs microcode.  May change HLE/RTM feature bits. */
 
-    if ( xen_guest )
-        hypervisor_ap_setup();
-
     smp_callin();
 
     set_cpu_sibling_map(cpu);
diff --git a/xen/include/asm-x86/guest/hypervisor.h 
b/xen/include/asm-x86/guest/hypervisor.h
index b503854c5b..64383f0c3d 100644
--- a/xen/include/asm-x86/guest/hypervisor.h
+++ b/xen/include/asm-x86/guest/hypervisor.h
@@ -44,7 +44,7 @@ void hypervisor_resume(void);
 
 static inline const char *hypervisor_probe(void) { return NULL; }
 static inline void hypervisor_setup(void) { ASSERT_UNREACHABLE(); }
-static inline int hypervisor_ap_setup(void) { ASSERT_UNREACHABLE(); return 0; }
+static inline int hypervisor_ap_setup(void) { return 0; }
 static inline void hypervisor_resume(void) { ASSERT_UNREACHABLE(); }
 
 #endif  /* CONFIG_GUEST */
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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