[PATCH v3 3/3] x86/svmdebug: Print np, sev and sev_es vmcb bits

[Vaishali Thakkar <vaishali.thakkar@xxxxxxxxxx>]

Currently only raw _np_ctrl is being printed. It can
be informational to know about which particular bits
are enabled. So, this commit adds the bit-by-bit decode
for np, sev and sev_es bits.

Note that while, only np is enabled in certain scenarios
at the moment, work for enabling sev and sev_es is in
progress. And it'll be useful to have this information as
part of svmdebug.

Signed-off-by: Vaishali Thakkar <vaishali.thakkar@xxxxxxxxxx>
---
Changes since v1:
        - Pretty printing
Changes since v2:
        - Minor changes in pretty printing to make information
          clear
        - Improve commit log and subject to include _np bit
---
 xen/arch/x86/hvm/svm/svmdebug.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/svm/svmdebug.c b/xen/arch/x86/hvm/svm/svmdebug.c
index 0d714c728c..9d3badcf5d 100644
--- a/xen/arch/x86/hvm/svm/svmdebug.c
+++ b/xen/arch/x86/hvm/svm/svmdebug.c
@@ -51,8 +51,11 @@ void svm_vmcb_dump(const char *from, const struct 
vmcb_struct *vmcb)
            vmcb->exitcode, vmcb->exit_int_info.raw);
     printk("exitinfo1 = %#"PRIx64" exitinfo2 = %#"PRIx64"\n",
            vmcb->exitinfo1, vmcb->exitinfo2);
-    printk("np_ctrl = %#"PRIx64" asid = %#x\n",
-           vmcb_get_np_ctrl(vmcb), vmcb_get_asid(vmcb));
+    printk("asid = %#x np_ctrl = %#"PRIx64":%s%s%s\n",
+           vmcb_get_asid(vmcb), vmcb_get_np_ctrl(vmcb),
+           vmcb_get_np(vmcb)     ? " NP"     : "",
+           vmcb_get_sev(vmcb)    ? " SEV"    : "",
+           vmcb_get_sev_es(vmcb) ? " SEV_ES" : "");
     printk("virtual vmload/vmsave = %d, virt_ext = %#"PRIx64"\n",
            vmcb->virt_ext.fields.vloadsave_enable, vmcb->virt_ext.bytes);
     printk("cpl = %d efer = %#"PRIx64" star = %#"PRIx64" lstar = %#"PRIx64"\n",
-- 
2.44.0