On 02/08/2018 10:25 AM, Alexandru Isaila wrote:
This commit separates the svm caps from the vmx caps.

Signed-off-by: Alexandru Isaila <aisa...@bitdefender.com>

---
Changes since V1:
        - Removed the if ( cpu_has_svm )
---
  xen/include/asm-x86/monitor.h | 34 +++++++++++++++++++---------------
  1 file changed, 19 insertions(+), 15 deletions(-)

diff --git a/xen/include/asm-x86/monitor.h b/xen/include/asm-x86/monitor.h
index a0444d1..b2b4e6a 100644
--- a/xen/include/asm-x86/monitor.h
+++ b/xen/include/asm-x86/monitor.h
@@ -71,24 +71,28 @@ static inline uint32_t arch_monitor_get_capabilities(struct 
domain *d)
      uint32_t capabilities = 0;
/*
-     * At the moment only Intel HVM domains are supported. However, event
-     * delivery could be extended to AMD and PV domains.
+     * At the moment only Intel and AMD HVM domains are supported. However, 
event
+     * delivery could be extended to and PV domains.
       */
-    if ( !is_hvm_domain(d) || !cpu_has_vmx )
+    if ( !is_hvm_domain(d) )
          return capabilities;
- capabilities = (1U << XEN_DOMCTL_MONITOR_EVENT_WRITE_CTRLREG) |
-                   (1U << XEN_DOMCTL_MONITOR_EVENT_MOV_TO_MSR) |
-                   (1U << XEN_DOMCTL_MONITOR_EVENT_SOFTWARE_BREAKPOINT) |
-                   (1U << XEN_DOMCTL_MONITOR_EVENT_GUEST_REQUEST) |
-                   (1U << XEN_DOMCTL_MONITOR_EVENT_DEBUG_EXCEPTION) |
-                   (1U << XEN_DOMCTL_MONITOR_EVENT_CPUID) |
-                   (1U << XEN_DOMCTL_MONITOR_EVENT_INTERRUPT) |
-                   (1U << XEN_DOMCTL_MONITOR_EVENT_EMUL_UNIMPLEMENTED);
-
-    /* Since we know this is on VMX, we can just call the hvm func */
-    if ( hvm_is_singlestep_supported() )
-        capabilities |= (1U << XEN_DOMCTL_MONITOR_EVENT_SINGLESTEP);
+    if( cpu_has_vmx )
+    {
+        capabilities = (1U << XEN_DOMCTL_MONITOR_EVENT_WRITE_CTRLREG) |
+                       (1U << XEN_DOMCTL_MONITOR_EVENT_MOV_TO_MSR) |
+                       (1U << XEN_DOMCTL_MONITOR_EVENT_SOFTWARE_BREAKPOINT) |
+                       (1U << XEN_DOMCTL_MONITOR_EVENT_DEBUG_EXCEPTION) |
+                       (1U << XEN_DOMCTL_MONITOR_EVENT_CPUID) |
+                       (1U << XEN_DOMCTL_MONITOR_EVENT_INTERRUPT) |
+                       (1U << XEN_DOMCTL_MONITOR_EVENT_EMUL_UNIMPLEMENTED);
+
+        /* Since we know this is on VMX, we can just call the hvm func */
+        if ( hvm_is_singlestep_supported() )
+            capabilities |= (1U << XEN_DOMCTL_MONITOR_EVENT_SINGLESTEP);
+    }
+
+    capabilities |= (1U << XEN_DOMCTL_MONITOR_EVENT_GUEST_REQUEST);


It's a nit but I'd start with setting common options and the OR in arch-specific ones. (i.e. move the line above to right after !is_hvm_domain(d) test).

-boris
        


if ( hvm_funcs.set_descriptor_access_exiting )
          capabilities |= (1U << XEN_DOMCTL_MONITOR_EVENT_DESC_ACCESS);


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