[Xen-changelog] [xen staging] SVM: split _np_enable VMCB field

[patchbot@xxxxxxx]

commit f57ae00635da429cee02373dc909542a411a09e5
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Mar 31 08:46:44 2020 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Mar 31 08:46:44 2020 +0200

    SVM: split _np_enable VMCB field
    
    The nest paging enable is actually just a single bit within the 64-bit
    VMCB field, which is particularly relevant for uses like the one in
    nsvm_vcpu_vmentry(). Split the field, adding definitions for a few other
    bits at the same time. To be able to generate accessors for bitfields,
    VMCB_ACCESSORS() needs the type part broken out, as typeof() can't be
    applied to bitfields. Unfortunately this means specification of the same
    type in two distinct places.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/hvm/svm/svmdebug.c    |  4 ++--
 xen/include/asm-x86/hvm/svm/vmcb.h | 28 +++++++++++++++++++++++-----
 2 files changed, 25 insertions(+), 7 deletions(-)

diff --git a/xen/arch/x86/hvm/svm/svmdebug.c b/xen/arch/x86/hvm/svm/svmdebug.c
index 5aa9d410ba..91f5d9400c 100644
--- a/xen/arch/x86/hvm/svm/svmdebug.c
+++ b/xen/arch/x86/hvm/svm/svmdebug.c
@@ -62,8 +62,8 @@ 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_enable = %#"PRIx64" guest_asid = %#x\n",
-           vmcb_get_np_enable(vmcb), vmcb_get_guest_asid(vmcb));
+    printk("np_ctrl = %#"PRIx64" guest_asid = %#x\n",
+           vmcb_get_np_ctrl(vmcb), vmcb_get_guest_asid(vmcb));
     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",
diff --git a/xen/include/asm-x86/hvm/svm/vmcb.h 
b/xen/include/asm-x86/hvm/svm/vmcb.h
index 58eafe3b23..e5ed38369e 100644
--- a/xen/include/asm-x86/hvm/svm/vmcb.h
+++ b/xen/include/asm-x86/hvm/svm/vmcb.h
@@ -447,7 +447,17 @@ struct vmcb_struct {
         } ei;
     };
     intinfo_t exit_int_info;    /* offset 0x88 */
-    u64 _np_enable;             /* offset 0x90 - cleanbit 4 */
+    union {                     /* offset 0x90 - cleanbit 4 */
+        struct {
+            bool _np_enable     :1;
+            bool _sev_enable    :1;
+            bool _sev_es_enable :1;
+            bool _gmet          :1;
+            bool                :1;
+            bool _vte           :1;
+        };
+        uint64_t _np_ctrl;
+    };
     u64 res08[2];
     intinfo_t event_inj;        /* offset 0xA8 */
     u64 _h_cr3;                 /* offset 0xB0 - cleanbit 4 */
@@ -577,20 +587,23 @@ void svm_intercept_msr(struct vcpu *v, uint32_t msr, int 
enable);
  * VMCB accessor functions.
  */
 
-#define VMCB_ACCESSORS(name, cleanbit)            \
+#define VMCB_ACCESSORS_(name, type, cleanbit)     \
 static inline void                                \
 vmcb_set_ ## name(struct vmcb_struct *vmcb,       \
-                  typeof(vmcb->_ ## name) value)  \
+                  type value)                     \
 {                                                 \
     vmcb->_ ## name = value;                      \
     vmcb->cleanbits.fields.cleanbit = 0;          \
 }                                                 \
-static inline typeof(alloc_vmcb()->_ ## name)     \
+static inline type                                \
 vmcb_get_ ## name(const struct vmcb_struct *vmcb) \
 {                                                 \
     return vmcb->_ ## name;                       \
 }
 
+#define VMCB_ACCESSORS(name, cleanbit) \
+        VMCB_ACCESSORS_(name, typeof(alloc_vmcb()->_ ## name), cleanbit)
+
 VMCB_ACCESSORS(cr_intercepts, intercepts)
 VMCB_ACCESSORS(dr_intercepts, intercepts)
 VMCB_ACCESSORS(exception_intercepts, intercepts)
@@ -603,7 +616,12 @@ VMCB_ACCESSORS(iopm_base_pa, iopm)
 VMCB_ACCESSORS(msrpm_base_pa, iopm)
 VMCB_ACCESSORS(guest_asid, asid)
 VMCB_ACCESSORS(vintr, tpr)
-VMCB_ACCESSORS(np_enable, np)
+VMCB_ACCESSORS(np_ctrl, np)
+VMCB_ACCESSORS_(np_enable, bool, np)
+VMCB_ACCESSORS_(sev_enable, bool, np)
+VMCB_ACCESSORS_(sev_es_enable, bool, np)
+VMCB_ACCESSORS_(gmet, bool, np)
+VMCB_ACCESSORS_(vte, bool, np)
 VMCB_ACCESSORS(h_cr3, np)
 VMCB_ACCESSORS(g_pat, np)
 VMCB_ACCESSORS(cr0, cr)
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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