[Xen-devel] [PATCH v4 06/15] x86/spec_ctrl: Add Hygon Dhyana to the respective mitigation machinery

[Pu Wen <puwen@xxxxxxxx>]

The Hygon Dhyana CPU has the same speculative execution as AMD family
17h, so share AMD Retpoline and PTI mitigation code with Hygon Dhyana.

Signed-off-by: Pu Wen <puwen@xxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/spec_ctrl.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/spec_ctrl.c b/xen/arch/x86/spec_ctrl.c
index 1171c02..1cd7903 100644
--- a/xen/arch/x86/spec_ctrl.c
+++ b/xen/arch/x86/spec_ctrl.c
@@ -306,7 +306,8 @@ static bool __init retpoline_safe(uint64_t caps)
 {
     unsigned int ucode_rev = this_cpu(ucode_cpu_info).cpu_sig.rev;
 
-    if ( boot_cpu_data.x86_vendor == X86_VENDOR_AMD )
+    if ( boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
+         boot_cpu_data.x86_vendor == X86_VENDOR_HYGON )
         return true;
 
     if ( boot_cpu_data.x86_vendor != X86_VENDOR_INTEL ||
@@ -632,7 +633,8 @@ int8_t __read_mostly opt_xpti_domu = -1;
 
 static __init void xpti_init_default(uint64_t caps)
 {
-    if ( boot_cpu_data.x86_vendor == X86_VENDOR_AMD )
+    if ( boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
+         boot_cpu_data.x86_vendor == X86_VENDOR_HYGON )
         caps = ARCH_CAPS_RDCL_NO;
 
     if ( caps & ARCH_CAPS_RDCL_NO )
-- 
2.7.4


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel