[Xen-devel] [PATCH RFC 05/14] xen: vmx: Disable the 2M/1G superpage when SPP enabled

[Zhang Yi <yi.z.zhang@xxxxxxxxxxxxxxx>]

From: Zhang Yi Z <yi.z.zhang@xxxxxxxxxxxxxxx>

Current we only support Sub-page Protection on the 4k
page table.

Signed-off-by: Zhang Yi Z <yi.z.zhang@xxxxxxxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vmx.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 04ae0d6..a4c24bb 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2497,6 +2497,12 @@ const struct hvm_function_table * __init start_vmx(void)
         vmx_function_table.get_guest_bndcfgs = vmx_get_guest_bndcfgs;
     }
 
+    if ( cpu_has_vmx_ept_spp )
+    {
+        vmx_function_table.hap_capabilities &= ~HVM_HAP_SUPERPAGE_2MB;
+        vmx_function_table.hap_capabilities &= ~HVM_HAP_SUPERPAGE_1GB;
+    }
+
     setup_vmcs_dump();
 
     lbr_tsx_fixup_check();
-- 
2.7.4


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