x86/svm: Drop svm_vm{load,save}() helpers

Following on from c/s 7d161f6537 "x86/svm: Fix svm_vmcb_dump() when used in
current context", there is now only a single user of svm_vmsave() remaining in
the tree, with all users moved to svm_vm{load,save}_pa().

nv->nv_n1vmcx has a matching nv->nv_n1vmcx_pa which is always correct, and
avoids a redundant __pa() translation behind the scenes.

With this gone, all VM{LOAD,SAVE} operations are using paddr_t's which is more
efficient, so drop the svm_vm{load,save}() helpers to avoid uses of them
reappearing in the future.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Brian Woods <brian.woods@amd.com>

xen/arch/x86/hvm/svm/nestedsvm.c

@@ -1030,7 +1030,7 @@ nsvm_vmcb_prepare4vmexit(struct vcpu *v, struct cpu_user_regs *regs)
     struct vmcb_struct *ns_vmcb = nv->nv_vvmcx;
     struct vmcb_struct *n2vmcb = nv->nv_n2vmcx;
 
-    svm_vmsave(nv->nv_n1vmcx);
+    svm_vmsave_pa(nv->nv_n1vmcx_pa);
 
     /* Cache guest physical address of virtual vmcb
      * for VMCB Cleanbit emulation.

xen/include/asm-x86/hvm/svm/svm.h

@@ -22,9 +22,6 @@
 
 #include <xen/types.h>
 
-#define svm_vmload(x)     svm_vmload_pa(__pa(x))
-#define svm_vmsave(x)     svm_vmsave_pa(__pa(x))
-
 static inline void svm_vmload_pa(paddr_t vmcb)
 {
     asm volatile (