[Xen-changelog] [xen staging] x86/amd: skip OSVW function calls if !CONFIG_HVM

[patchbot@xxxxxxx]

commit c94ea358a3dcdce993aa0bdae040a3e3f1730816
Author:     Wei Liu <wei.liu2@xxxxxxxxxx>
AuthorDate: Fri Aug 17 16:12:36 2018 +0100
Commit:     Wei Liu <wei.liu2@xxxxxxxxxx>
CommitDate: Tue Aug 21 15:01:13 2018 +0100

    x86/amd: skip OSVW function calls if !CONFIG_HVM
    
    The two functions are not needed when HVM is not supported in
    hypervisor.
    
    Note that using hvm_enabled won't work because early_microcode_init
    gets to cpu_request_microcode before hvm_enabled is set in presmp init
    call stage.
    
    Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/microcode_amd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/xen/arch/x86/microcode_amd.c b/xen/arch/x86/microcode_amd.c
index 53f9f548cd..fba44ccba9 100644
--- a/xen/arch/x86/microcode_amd.c
+++ b/xen/arch/x86/microcode_amd.c
@@ -550,7 +550,9 @@ static int cpu_request_microcode(unsigned int cpu, const 
void *buf,
         xfree(mc_old);
 
   out:
+#if CONFIG_HVM
     svm_host_osvw_init();
+#endif
 
     /*
      * In some cases we may return an error even if processor's microcode has
@@ -609,6 +611,7 @@ err1:
 
 static int start_update(void)
 {
+#if CONFIG_HVM
     /*
      * We assume here that svm_host_osvw_init() will be called on each cpu 
(from
      * cpu_request_microcode()).
@@ -619,6 +622,7 @@ static int start_update(void)
      * supporting OSVW so we will not deal with this possibility.
      */
     svm_host_osvw_reset();
+#endif
 
     return 0;
 }
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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