From: Aravindh Puthiyaparambil <aravindh@virtuata.com>
Date: Fri, 27 Apr 2012 15:57:55 +0000 (+0200)
Subject: x86: Add FS and GS base to HVM VCPU context
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https://%22%22/%22http:/www.example.com/cgi/%22https:/%22%22?a=commitdiff_plain;h=b7fa98fbf14f8e08919e9e0d531fa2472619d26e;p=xen.git

x86: Add FS and GS base to HVM VCPU context

Add FS and GS base to the HVM VCPU context returned by
xc_vcpu_getcontext().

Signed-off-by: Aravindh Puthiyaparambil <aravindh@virtuata.com>
Committed-by: Jan Beulich <jbeulich@suse.com>
---

diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index 168147fa98..a79f581e19 100644
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -1590,8 +1590,23 @@ void arch_get_info_guest(struct vcpu *v, vcpu_guest_context_u c)
         c.nat->user_regs.es = sreg.sel;
         hvm_get_segment_register(v, x86_seg_fs, &sreg);
         c.nat->user_regs.fs = sreg.sel;
+#ifdef __x86_64__
+        c.nat->fs_base = sreg.base;
+#endif
         hvm_get_segment_register(v, x86_seg_gs, &sreg);
         c.nat->user_regs.gs = sreg.sel;
+#ifdef __x86_64__
+        if ( ring_0(&c.nat->user_regs) )
+        {
+            c.nat->gs_base_kernel = sreg.base;
+            c.nat->gs_base_user = hvm_get_shadow_gs_base(v);
+        }
+        else
+        {
+            c.nat->gs_base_user = sreg.base;
+            c.nat->gs_base_kernel = hvm_get_shadow_gs_base(v);
+        }
+#endif
     }
     else
     {