[Xen-changelog] [xen stable-4.8] x86: Introduce a common cpuid_policy_updated()

[patchbot@xxxxxxx]

commit 17bfbc8289c487bcb5f446f79de54869f12786cb
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Thu Feb 8 12:42:48 2018 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Feb 8 12:42:48 2018 +0100

    x86: Introduce a common cpuid_policy_updated()
    
    No practical change at the moment, but future changes will need to react
    irrespective of guest type.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    master commit: b357546b43ab87dfb10d740ae637a685134d5e32
    master date: 2018-01-05 19:57:07 +0000
---
 xen/arch/x86/domain.c        | 12 ++++++++++++
 xen/arch/x86/domctl.c        |  4 ++--
 xen/arch/x86/hvm/hvm.c       |  2 --
 xen/include/asm-x86/domain.h |  2 ++
 4 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index 8817263..7e74832 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -485,6 +485,8 @@ int vcpu_initialise(struct vcpu *v)
         if ( is_pv_domain(d) )
             xfree(v->arch.pv_vcpu.trap_ctxt);
     }
+    else if ( !is_idle_domain(v->domain) )
+        cpuid_policy_updated(v);
 
     return rc;
 }
@@ -2659,6 +2661,16 @@ int domain_relinquish_resources(struct domain *d)
     return 0;
 }
 
+/*
+ * Called during vcpu construction, and each time the toolstack changes the
+ * CPUID configuration for the domain.
+ */
+void cpuid_policy_updated(struct vcpu *v)
+{
+    if ( is_hvm_vcpu(v) )
+        hvm_cpuid_policy_changed(v);
+}
+
 void arch_dump_domain_info(struct domain *d)
 {
     paging_dump_domain_info(d);
diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index ad5536d..84e5856 100644
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -231,12 +231,12 @@ static void update_domain_cpuid_info(struct domain *d,
         break;
     }
 
-    if ( is_hvm_domain(d) && call_policy_changed )
+    if ( call_policy_changed )
     {
         struct vcpu *v;
 
         for_each_vcpu( d, v )
-            hvm_cpuid_policy_changed(v);
+            cpuid_policy_updated(v);
     }
 }
 
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 9b228d8..a5ad7ca 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -1621,8 +1621,6 @@ int hvm_vcpu_initialise(struct vcpu *v)
         hvm_set_guest_tsc(v, 0);
     }
 
-    hvm_cpuid_policy_changed(v);
-
     return 0;
 
  fail6:
diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h
index 82dca93..33f1c88 100644
--- a/xen/include/asm-x86/domain.h
+++ b/xen/include/asm-x86/domain.h
@@ -79,6 +79,8 @@ void toggle_guest_mode(struct vcpu *);
 /* x86/64: toggle guest page tables between kernel and user modes. */
 void toggle_guest_pt(struct vcpu *);
 
+void cpuid_policy_updated(struct vcpu *v);
+
 /*
  * Initialise a hypercall-transfer page. The given pointer must be mapped
  * in Xen virtual address space (accesses are not validated or checked).
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.8

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