KVM: x86: Cleanup of rflags.rf cleaning

RFLAGS.RF was cleaned in several functions (e.g., syscall) in the x86 emulator.
Now that we clear it before the execution of an instruction in the emulator, we
can remove the specific cleanup of RFLAGS.RF.

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 189b8bd..8d41556 100644 (file)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2211,7 +2211,7 @@ static int em_syscall(struct x86_emulate_ctxt *ctxt)
        *reg_write(ctxt, VCPU_REGS_RCX) = ctxt->_eip;
        if (efer & EFER_LMA) {
 #ifdef CONFIG_X86_64
-               *reg_write(ctxt, VCPU_REGS_R11) = ctxt->eflags & ~EFLG_RF;
+               *reg_write(ctxt, VCPU_REGS_R11) = ctxt->eflags;
 
                ops->get_msr(ctxt,
                             ctxt->mode == X86EMUL_MODE_PROT64 ?
@@ -2219,14 +2219,14 @@ static int em_syscall(struct x86_emulate_ctxt *ctxt)
                ctxt->_eip = msr_data;
 
                ops->get_msr(ctxt, MSR_SYSCALL_MASK, &msr_data);
-               ctxt->eflags &= ~(msr_data | EFLG_RF);
+               ctxt->eflags &= ~msr_data;
 #endif
        } else {
                /* legacy mode */
                ops->get_msr(ctxt, MSR_STAR, &msr_data);
                ctxt->_eip = (u32)msr_data;
 
-               ctxt->eflags &= ~(EFLG_VM | EFLG_IF | EFLG_RF);
+               ctxt->eflags &= ~(EFLG_VM | EFLG_IF);
        }
 
        return X86EMUL_CONTINUE;
@@ -2275,7 +2275,7 @@ static int em_sysenter(struct x86_emulate_ctxt *ctxt)
                break;
        }
 
-       ctxt->eflags &= ~(EFLG_VM | EFLG_IF | EFLG_RF);
+       ctxt->eflags &= ~(EFLG_VM | EFLG_IF);
        cs_sel = (u16)msr_data;
        cs_sel &= ~SELECTOR_RPL_MASK;
        ss_sel = cs_sel + 8;