x86: get rid of _MASK flags

There's no need for the *_MASK flags (TF_MASK, IF_MASK, etc), found in
processor.h (both _32 and _64). They have a one-to-one mapping with the
EFLAGS value. This patch removes the definitions, and use the already
existent X86_EFLAGS_ version when applicable.

[ roland@redhat.com: KVM build fixes. ]

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/ia32/ia32_signal.c

@@ -501,7 +501,7 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
 	regs->ss = __USER32_DS;
 
 	set_fs(USER_DS);
-	regs->flags &= ~TF_MASK;
+	regs->flags &= ~X86_EFLAGS_TF;
 	if (test_thread_flag(TIF_SINGLESTEP))
 		ptrace_notify(SIGTRAP);
 
@@ -601,7 +601,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	regs->ss = __USER32_DS;
 
 	set_fs(USER_DS);
-	regs->flags &= ~TF_MASK;
+	regs->flags &= ~X86_EFLAGS_TF;
 	if (test_thread_flag(TIF_SINGLESTEP))
 		ptrace_notify(SIGTRAP);
 

arch/x86/kernel/kprobes.c

@@ -387,9 +387,9 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
 {
 	__get_cpu_var(current_kprobe) = p;
 	kcb->kprobe_saved_flags = kcb->kprobe_old_flags
-		= (regs->flags & (TF_MASK | IF_MASK));
+		= (regs->flags & (X86_EFLAGS_TF | X86_EFLAGS_IF));
 	if (is_IF_modifier(p->ainsn.insn))
-		kcb->kprobe_saved_flags &= ~IF_MASK;
+		kcb->kprobe_saved_flags &= ~X86_EFLAGS_IF;
 }
 
 static __always_inline void clear_btf(void)
@@ -407,8 +407,8 @@ static __always_inline void restore_btf(void)
 static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
 {
 	clear_btf();
-	regs->flags |= TF_MASK;
-	regs->flags &= ~IF_MASK;
+	regs->flags |= X86_EFLAGS_TF;
+	regs->flags &= ~X86_EFLAGS_IF;
 	/*single step inline if the instruction is an int3*/
 	if (p->opcode == BREAKPOINT_INSTRUCTION)
 		regs->ip = (unsigned long)p->addr;
@@ -454,7 +454,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 		if (p) {
 			if (kcb->kprobe_status == KPROBE_HIT_SS &&
 				*p->ainsn.insn == BREAKPOINT_INSTRUCTION) {
-				regs->flags &= ~TF_MASK;
+				regs->flags &= ~X86_EFLAGS_TF;
 				regs->flags |= kcb->kprobe_saved_flags;
 				goto no_kprobe;
 #ifdef CONFIG_X86_64
@@ -749,10 +749,10 @@ static void __kprobes resume_execution(struct kprobe *p,
 		insn++;
 #endif
 
-	regs->flags &= ~TF_MASK;
+	regs->flags &= ~X86_EFLAGS_TF;
 	switch (*insn) {
 	case 0x9c:	/* pushfl */
-		*tos &= ~(TF_MASK | IF_MASK);
+		*tos &= ~(X86_EFLAGS_TF | X86_EFLAGS_IF);
 		*tos |= kcb->kprobe_old_flags;
 		break;
 	case 0xc2:	/* iret/ret/lret */
@@ -852,7 +852,7 @@ out:
 	 * will have TF set, in which case, continue the remaining processing
 	 * of do_debug, as if this is not a probe hit.
 	 */
-	if (regs->flags & TF_MASK)
+	if (regs->flags & X86_EFLAGS_TF)
 		return 0;
 
 	return 1;
@@ -982,7 +982,7 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
 	 */
 	memcpy(kcb->jprobes_stack, (kprobe_opcode_t *)addr,
 	       MIN_STACK_SIZE(addr));
-	regs->flags &= ~IF_MASK;
+	regs->flags &= ~X86_EFLAGS_IF;
 	trace_hardirqs_off();
 	regs->ip = (unsigned long)(jp->entry);
 	return 1;

arch/x86/kernel/signal_64.c

@@ -295,7 +295,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	   see include/asm-x86_64/uaccess.h for details. */
 	set_fs(USER_DS);
 
-	regs->flags &= ~TF_MASK;
+	regs->flags &= ~X86_EFLAGS_TF;
 	if (test_thread_flag(TIF_SINGLESTEP))
 		ptrace_notify(SIGTRAP);
 #ifdef DEBUG_SIG
@@ -463,7 +463,7 @@ do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags)
 	       
 	/* Pending single-step? */
 	if (thread_info_flags & _TIF_SINGLESTEP) {
-		regs->flags |= TF_MASK;
+		regs->flags |= X86_EFLAGS_TF;
 		clear_thread_flag(TIF_SINGLESTEP);
 	}
 

arch/x86/kernel/traps_64.c

@@ -904,7 +904,7 @@ clear_dr7:
 
 clear_TF_reenable:
 	set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
-	regs->flags &= ~TF_MASK;
+	regs->flags &= ~X86_EFLAGS_TF;
 	preempt_conditional_cli(regs);
 }
 

drivers/kvm/vmx.c

@@ -524,7 +524,7 @@ static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
 static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
 {
 	if (vcpu->rmode.active)
-		rflags |= IOPL_MASK | X86_EFLAGS_VM;
+		rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
 	vmcs_writel(GUEST_RFLAGS, rflags);
 }
 
@@ -1050,7 +1050,7 @@ static void enter_pmode(struct kvm_vcpu *vcpu)
 	vmcs_write32(GUEST_TR_AR_BYTES, vcpu->rmode.tr.ar);
 
 	flags = vmcs_readl(GUEST_RFLAGS);
-	flags &= ~(IOPL_MASK | X86_EFLAGS_VM);
+	flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM);
 	flags |= (vcpu->rmode.save_iopl << IOPL_SHIFT);
 	vmcs_writel(GUEST_RFLAGS, flags);
 
@@ -1107,9 +1107,9 @@ static void enter_rmode(struct kvm_vcpu *vcpu)
 	vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
 
 	flags = vmcs_readl(GUEST_RFLAGS);
-	vcpu->rmode.save_iopl = (flags & IOPL_MASK) >> IOPL_SHIFT;
+	vcpu->rmode.save_iopl = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT;
 
-	flags |= IOPL_MASK | X86_EFLAGS_VM;
+	flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
 
 	vmcs_writel(GUEST_RFLAGS, flags);
 	vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);

include/asm-x86/kprobes.h

@@ -88,7 +88,7 @@ struct kprobe_ctlblk {
  */
 static inline void restore_interrupts(struct pt_regs *regs)
 {
-	if (regs->flags & IF_MASK)
+	if (regs->flags & X86_EFLAGS_IF)
 		local_irq_enable();
 }
 

include/asm-x86/processor.h

@@ -1,6 +1,8 @@
 #ifndef __ASM_X86_PROCESSOR_H
 #define __ASM_X86_PROCESSOR_H
 
+#include <asm/processor-flags.h>
+
 static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
 					 unsigned int *ecx, unsigned int *edx)
 {

include/asm-x86/processor_32.h

@@ -19,7 +19,6 @@
 #include <asm/percpu.h>
 #include <linux/cpumask.h>
 #include <linux/init.h>
-#include <asm/processor-flags.h>
 #include <asm/desc_defs.h>
 
 static inline int desc_empty(const void *ptr)

include/asm-x86/processor_64.h

@@ -18,19 +18,8 @@
 #include <asm/percpu.h>
 #include <linux/personality.h>
 #include <linux/cpumask.h>
-#include <asm/processor-flags.h>
 #include <asm/desc_defs.h>
 
-#define TF_MASK		0x00000100
-#define IF_MASK		0x00000200
-#define IOPL_MASK	0x00003000
-#define NT_MASK		0x00004000
-#define VM_MASK		0x00020000
-#define AC_MASK		0x00040000
-#define VIF_MASK	0x00080000	/* virtual interrupt flag */
-#define VIP_MASK	0x00100000	/* virtual interrupt pending */
-#define ID_MASK		0x00200000
-
 static inline int desc_empty(const void *ptr)
 {
 	const u32 *desc = ptr;