KVM: x86 emulator: drop use of is_long_mode()

Requires ctxt->vcpu, which is to be abolished.  Replace with open calls
to get_msr().

Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 12 insertions, 7 deletions

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 57e0e291b38d..be1532f4b8b8 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1844,12 +1844,14 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
         struct desc_struct cs, ss;
         u64 msr_data;
         u16 cs_sel, ss_sel;
+        u64 efer = 0;
 
         /* syscall is not available in real mode */
         if (ctxt->mode == X86EMUL_MODE_REAL ||
             ctxt->mode == X86EMUL_MODE_VM86)
                 return emulate_ud(ctxt);
 
+        ops->get_msr(ctxt, MSR_EFER, &efer);
         setup_syscalls_segments(ctxt, ops, &cs, &ss);
 
         ops->get_msr(ctxt, MSR_STAR, &msr_data);
@@ -1857,7 +1859,7 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
         cs_sel = (u16)(msr_data & 0xfffc);
         ss_sel = (u16)(msr_data + 8);
 
-        if (is_long_mode(ctxt->vcpu)) {
+        if (efer & EFER_LMA) {
                 cs.d = 0;
                 cs.l = 1;
         }
@@ -1867,7 +1869,7 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
         ops->set_segment_selector(ctxt, ss_sel, VCPU_SREG_SS);
 
         c->regs[VCPU_REGS_RCX] = c->eip;
-        if (is_long_mode(ctxt->vcpu)) {
+        if (efer & EFER_LMA) {
 #ifdef CONFIG_X86_64
                 c->regs[VCPU_REGS_R11] = ctxt->eflags & ~EFLG_RF;
 
@@ -1897,7 +1899,9 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
         struct desc_struct cs, ss;
         u64 msr_data;
         u16 cs_sel, ss_sel;
+        u64 efer = 0;
 
+        ctxt->ops->get_msr(ctxt, MSR_EFER, &efer);
         /* inject #GP if in real mode */
         if (ctxt->mode == X86EMUL_MODE_REAL)
                 return emulate_gp(ctxt, 0);
@@ -1927,8 +1931,7 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
         cs_sel &= ~SELECTOR_RPL_MASK;
         ss_sel = cs_sel + 8;
         ss_sel &= ~SELECTOR_RPL_MASK;
-        if (ctxt->mode == X86EMUL_MODE_PROT64
-                || is_long_mode(ctxt->vcpu)) {
+        if (ctxt->mode == X86EMUL_MODE_PROT64 || (efer & EFER_LMA)) {
                 cs.d = 0;
                 cs.l = 1;
         }
@@ -2603,6 +2606,7 @@ static int check_cr_write(struct x86_emulate_ctxt *ctxt)
         struct decode_cache *c = &ctxt->decode;
         u64 new_val = c->src.val64;
         int cr = c->modrm_reg;
+        u64 efer = 0;
 
         static u64 cr_reserved_bits[] = {
                 0xffffffff00000000ULL,
@@ -2620,7 +2624,7 @@ static int check_cr_write(struct x86_emulate_ctxt *ctxt)
 
         switch (cr) {
         case 0: {
-                u64 cr4, efer;
+                u64 cr4;
                 if (((new_val & X86_CR0_PG) && !(new_val & X86_CR0_PE)) ||
                     ((new_val & X86_CR0_NW) && !(new_val & X86_CR0_CD)))
                         return emulate_gp(ctxt, 0);
@@ -2637,7 +2641,8 @@ static int check_cr_write(struct x86_emulate_ctxt *ctxt)
         case 3: {
                 u64 rsvd = 0;
 
-                if (is_long_mode(ctxt->vcpu))
+                ctxt->ops->get_msr(ctxt, MSR_EFER, &efer);
+                if (efer & EFER_LMA)
                         rsvd = CR3_L_MODE_RESERVED_BITS;
                 else if (is_pae(ctxt->vcpu))
                         rsvd = CR3_PAE_RESERVED_BITS;
@@ -2650,7 +2655,7 @@ static int check_cr_write(struct x86_emulate_ctxt *ctxt)
                 break;
                 }
         case 4: {
-                u64 cr4, efer;
+                u64 cr4;
 
                 cr4 = ctxt->ops->get_cr(ctxt, 4);
                 ctxt->ops->get_msr(ctxt, MSR_EFER, &efer);