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Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse source 
Pull asm/x86 changes from Ingo Molnar:
 "Misc changes, with a bigger processor-flags cleanup/reorganization by
  Peter Anvin"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, asm, cleanup: Replace open-coded control register values with symbolic
  x86, processor-flags: Fix the datatypes and add bit number defines
  x86: Rename X86_CR4_RDWRGSFS to X86_CR4_FSGSBASE
  x86, flags: Rename X86_EFLAGS_BIT1 to X86_EFLAGS_FIXED
  linux/const.h: Add _BITUL() and _BITULL()
  x86/vdso: Convert use of typedef ctl_table to struct ctl_table
  x86: __force_order doesn't need to be an actual variable
This commit is contained in:
Linus Torvalds 2013-07-02 16:21:45 -07:00
commit 002e44bfb5
14 changed files with 120 additions and 63 deletions
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2
arch/x86/include/asm/kvm_host.h
View file

@ -59,7 +59,7 @@
(~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
| X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
| X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR | X86_CR4_PCIDE \
| X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_RDWRGSFS \
| X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_FSGSBASE \
| X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)

2
arch/x86/include/asm/special_insns.h
View file

@ -16,7 +16,7 @@ static inline void native_clts(void)
* all loads stores around it, which can hurt performance. Solution is to
* use a variable and mimic reads and writes to it to enforce serialization
*/
static unsigned long __force_order;
extern unsigned long __force_order;
static inline unsigned long native_read_cr0(void)
{

154
arch/x86/include/uapi/asm/processor-flags.h
View file

@ -2,75 +2,129 @@
#define _UAPI_ASM_X86_PROCESSOR_FLAGS_H
/* Various flags defined: can be included from assembler. */
#include <linux/const.h>
/*
* EFLAGS bits
*/
#define X86_EFLAGS_CF 0x00000001 /* Carry Flag */
#define X86_EFLAGS_BIT1 0x00000002 /* Bit 1 - always on */
#define X86_EFLAGS_PF 0x00000004 /* Parity Flag */
#define X86_EFLAGS_AF 0x00000010 /* Auxiliary carry Flag */
#define X86_EFLAGS_ZF 0x00000040 /* Zero Flag */
#define X86_EFLAGS_SF 0x00000080 /* Sign Flag */
#define X86_EFLAGS_TF 0x00000100 /* Trap Flag */
#define X86_EFLAGS_IF 0x00000200 /* Interrupt Flag */
#define X86_EFLAGS_DF 0x00000400 /* Direction Flag */
#define X86_EFLAGS_OF 0x00000800 /* Overflow Flag */
#define X86_EFLAGS_IOPL 0x00003000 /* IOPL mask */
#define X86_EFLAGS_NT 0x00004000 /* Nested Task */
#define X86_EFLAGS_RF 0x00010000 /* Resume Flag */
#define X86_EFLAGS_VM 0x00020000 /* Virtual Mode */
#define X86_EFLAGS_AC 0x00040000 /* Alignment Check */
#define X86_EFLAGS_VIF 0x00080000 /* Virtual Interrupt Flag */
#define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */
#define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */
#define X86_EFLAGS_CF_BIT 0 /* Carry Flag */
#define X86_EFLAGS_CF _BITUL(X86_EFLAGS_CF_BIT)
#define X86_EFLAGS_FIXED_BIT 1 /* Bit 1 - always on */
#define X86_EFLAGS_FIXED _BITUL(X86_EFLAGS_FIXED_BIT)
#define X86_EFLAGS_PF_BIT 2 /* Parity Flag */
#define X86_EFLAGS_PF _BITUL(X86_EFLAGS_PF_BIT)
#define X86_EFLAGS_AF_BIT 4 /* Auxiliary carry Flag */
#define X86_EFLAGS_AF _BITUL(X86_EFLAGS_AF_BIT)
#define X86_EFLAGS_ZF_BIT 6 /* Zero Flag */
#define X86_EFLAGS_ZF _BITUL(X86_EFLAGS_ZF_BIT)
#define X86_EFLAGS_SF_BIT 7 /* Sign Flag */
#define X86_EFLAGS_SF _BITUL(X86_EFLAGS_SF_BIT)
#define X86_EFLAGS_TF_BIT 8 /* Trap Flag */
#define X86_EFLAGS_TF _BITUL(X86_EFLAGS_TF_BIT)
#define X86_EFLAGS_IF_BIT 9 /* Interrupt Flag */
#define X86_EFLAGS_IF _BITUL(X86_EFLAGS_IF_BIT)
#define X86_EFLAGS_DF_BIT 10 /* Direction Flag */
#define X86_EFLAGS_DF _BITUL(X86_EFLAGS_DF_BIT)
#define X86_EFLAGS_OF_BIT 11 /* Overflow Flag */
#define X86_EFLAGS_OF _BITUL(X86_EFLAGS_OF_BIT)
#define X86_EFLAGS_IOPL_BIT 12 /* I/O Privilege Level (2 bits) */
#define X86_EFLAGS_IOPL (_AC(3,UL) << X86_EFLAGS_IOPL_BIT)
#define X86_EFLAGS_NT_BIT 14 /* Nested Task */
#define X86_EFLAGS_NT _BITUL(X86_EFLAGS_NT_BIT)
#define X86_EFLAGS_RF_BIT 16 /* Resume Flag */
#define X86_EFLAGS_RF _BITUL(X86_EFLAGS_RF_BIT)
#define X86_EFLAGS_VM_BIT 17 /* Virtual Mode */
#define X86_EFLAGS_VM _BITUL(X86_EFLAGS_VM_BIT)
#define X86_EFLAGS_AC_BIT 18 /* Alignment Check/Access Control */
#define X86_EFLAGS_AC _BITUL(X86_EFLAGS_AC_BIT)
#define X86_EFLAGS_AC_BIT 18 /* Alignment Check/Access Control */
#define X86_EFLAGS_AC _BITUL(X86_EFLAGS_AC_BIT)
#define X86_EFLAGS_VIF_BIT 19 /* Virtual Interrupt Flag */
#define X86_EFLAGS_VIF _BITUL(X86_EFLAGS_VIF_BIT)
#define X86_EFLAGS_VIP_BIT 20 /* Virtual Interrupt Pending */
#define X86_EFLAGS_VIP _BITUL(X86_EFLAGS_VIP_BIT)
#define X86_EFLAGS_ID_BIT 21 /* CPUID detection */
#define X86_EFLAGS_ID _BITUL(X86_EFLAGS_ID_BIT)
/*
* Basic CPU control in CR0
*/
#define X86_CR0_PE 0x00000001 /* Protection Enable */
#define X86_CR0_MP 0x00000002 /* Monitor Coprocessor */
#define X86_CR0_EM 0x00000004 /* Emulation */
#define X86_CR0_TS 0x00000008 /* Task Switched */
#define X86_CR0_ET 0x00000010 /* Extension Type */
#define X86_CR0_NE 0x00000020 /* Numeric Error */
#define X86_CR0_WP 0x00010000 /* Write Protect */
#define X86_CR0_AM 0x00040000 /* Alignment Mask */
#define X86_CR0_NW 0x20000000 /* Not Write-through */
#define X86_CR0_CD 0x40000000 /* Cache Disable */
#define X86_CR0_PG 0x80000000 /* Paging */
#define X86_CR0_PE_BIT 0 /* Protection Enable */
#define X86_CR0_PE _BITUL(X86_CR0_PE_BIT)
#define X86_CR0_MP_BIT 1 /* Monitor Coprocessor */
#define X86_CR0_MP _BITUL(X86_CR0_MP_BIT)
#define X86_CR0_EM_BIT 2 /* Emulation */
#define X86_CR0_EM _BITUL(X86_CR0_EM_BIT)
#define X86_CR0_TS_BIT 3 /* Task Switched */
#define X86_CR0_TS _BITUL(X86_CR0_TS_BIT)
#define X86_CR0_ET_BIT 4 /* Extension Type */
#define X86_CR0_ET _BITUL(X86_CR0_ET_BIT)
#define X86_CR0_NE_BIT 5 /* Numeric Error */
#define X86_CR0_NE _BITUL(X86_CR0_NE_BIT)
#define X86_CR0_WP_BIT 16 /* Write Protect */
#define X86_CR0_WP _BITUL(X86_CR0_WP_BIT)
#define X86_CR0_AM_BIT 18 /* Alignment Mask */
#define X86_CR0_AM _BITUL(X86_CR0_AM_BIT)
#define X86_CR0_NW_BIT 29 /* Not Write-through */
#define X86_CR0_NW _BITUL(X86_CR0_NW_BIT)
#define X86_CR0_CD_BIT 30 /* Cache Disable */
#define X86_CR0_CD _BITUL(X86_CR0_CD_BIT)
#define X86_CR0_PG_BIT 31 /* Paging */
#define X86_CR0_PG _BITUL(X86_CR0_PG_BIT)
/*
* Paging options in CR3
*/
#define X86_CR3_PWT 0x00000008 /* Page Write Through */
#define X86_CR3_PCD 0x00000010 /* Page Cache Disable */
#define X86_CR3_PCID_MASK 0x00000fff /* PCID Mask */
#define X86_CR3_PWT_BIT 3 /* Page Write Through */
#define X86_CR3_PWT _BITUL(X86_CR3_PWT_BIT)
#define X86_CR3_PCD_BIT 4 /* Page Cache Disable */
#define X86_CR3_PCD _BITUL(X86_CR3_PCD_BIT)
#define X86_CR3_PCID_MASK _AC(0x00000fff,UL) /* PCID Mask */
/*
* Intel CPU features in CR4
*/
#define X86_CR4_VME 0x00000001 /* enable vm86 extensions */
#define X86_CR4_PVI 0x00000002 /* virtual interrupts flag enable */
#define X86_CR4_TSD 0x00000004 /* disable time stamp at ipl 3 */
#define X86_CR4_DE 0x00000008 /* enable debugging extensions */
#define X86_CR4_PSE 0x00000010 /* enable page size extensions */
#define X86_CR4_PAE 0x00000020 /* enable physical address extensions */
#define X86_CR4_MCE 0x00000040 /* Machine check enable */
#define X86_CR4_PGE 0x00000080 /* enable global pages */
#define X86_CR4_PCE 0x00000100 /* enable performance counters at ipl 3 */
#define X86_CR4_OSFXSR 0x00000200 /* enable fast FPU save and restore */
#define X86_CR4_OSXMMEXCPT 0x00000400 /* enable unmasked SSE exceptions */
#define X86_CR4_VMXE 0x00002000 /* enable VMX virtualization */
#define X86_CR4_RDWRGSFS 0x00010000 /* enable RDWRGSFS support */
#define X86_CR4_PCIDE 0x00020000 /* enable PCID support */
#define X86_CR4_OSXSAVE 0x00040000 /* enable xsave and xrestore */
#define X86_CR4_SMEP 0x00100000 /* enable SMEP support */
#define X86_CR4_SMAP 0x00200000 /* enable SMAP support */
#define X86_CR4_VME_BIT 0 /* enable vm86 extensions */
#define X86_CR4_VME _BITUL(X86_CR4_VME_BIT)
#define X86_CR4_PVI_BIT 1 /* virtual interrupts flag enable */
#define X86_CR4_PVI _BITUL(X86_CR4_PVI_BIT)
#define X86_CR4_TSD_BIT 2 /* disable time stamp at ipl 3 */
#define X86_CR4_TSD _BITUL(X86_CR4_TSD_BIT)
#define X86_CR4_DE_BIT 3 /* enable debugging extensions */
#define X86_CR4_DE _BITUL(X86_CR4_DE_BIT)
#define X86_CR4_PSE_BIT 4 /* enable page size extensions */
#define X86_CR4_PSE _BITUL(X86_CR4_PSE_BIT)
#define X86_CR4_PAE_BIT 5 /* enable physical address extensions */
#define X86_CR4_PAE _BITUL(X86_CR4_PAE_BIT)
#define X86_CR4_MCE_BIT 6 /* Machine check enable */
#define X86_CR4_MCE _BITUL(X86_CR4_MCE_BIT)
#define X86_CR4_PGE_BIT 7 /* enable global pages */
#define X86_CR4_PGE _BITUL(X86_CR4_PGE_BIT)
#define X86_CR4_PCE_BIT 8 /* enable performance counters at ipl 3 */
#define X86_CR4_PCE _BITUL(X86_CR4_PCE_BIT)
#define X86_CR4_OSFXSR_BIT 9 /* enable fast FPU save and restore */
#define X86_CR4_OSFXSR _BITUL(X86_CR4_OSFXSR_BIT)
#define X86_CR4_OSXMMEXCPT_BIT 10 /* enable unmasked SSE exceptions */
#define X86_CR4_OSXMMEXCPT _BITUL(X86_CR4_OSXMMEXCPT_BIT)
#define X86_CR4_VMXE_BIT 13 /* enable VMX virtualization */
#define X86_CR4_VMXE _BITUL(X86_CR4_VMXE_BIT)
#define X86_CR4_SMXE_BIT 14 /* enable safer mode (TXT) */
#define X86_CR4_SMXE _BITUL(X86_CR4_SMXE_BIT)
#define X86_CR4_FSGSBASE_BIT 16 /* enable RDWRFSGS support */
#define X86_CR4_FSGSBASE _BITUL(X86_CR4_FSGSBASE_BIT)
#define X86_CR4_PCIDE_BIT 17 /* enable PCID support */
#define X86_CR4_PCIDE _BITUL(X86_CR4_PCIDE_BIT)
#define X86_CR4_OSXSAVE_BIT 18 /* enable xsave and xrestore */
#define X86_CR4_OSXSAVE _BITUL(X86_CR4_OSXSAVE_BIT)
#define X86_CR4_SMEP_BIT 20 /* enable SMEP support */
#define X86_CR4_SMEP _BITUL(X86_CR4_SMEP_BIT)
#define X86_CR4_SMAP_BIT 21 /* enable SMAP support */
#define X86_CR4_SMAP _BITUL(X86_CR4_SMAP_BIT)
/*
* x86-64 Task Priority Register, CR8
*/
#define X86_CR8_TPR 0x0000000F /* task priority register */
#define X86_CR8_TPR _AC(0x0000000f,UL) /* task priority register */
/*
* AMD and Transmeta use MSRs for configuration; see <asm/msr-index.h>

2
arch/x86/kernel/cpu/mtrr/cyrix.c
View file

@ -167,7 +167,7 @@ static void post_set(void)
setCx86(CX86_CCR3, ccr3);
/* Enable caches */
write_cr0(read_cr0() & 0xbfffffff);
write_cr0(read_cr0() & ~X86_CR0_CD);
/* Restore value of CR4 */
if (cpu_has_pge)

2
arch/x86/kernel/cpu/mtrr/generic.c
View file

@ -701,7 +701,7 @@ static void post_set(void) __releases(set_atomicity_lock)
mtrr_wrmsr(MSR_MTRRdefType, deftype_lo, deftype_hi);
/* Enable caches */
write_cr0(read_cr0() & 0xbfffffff);
write_cr0(read_cr0() & ~X86_CR0_CD);
/* Restore value of CR4 */
if (cpu_has_pge)

2
arch/x86/kernel/entry_64.S
View file

@ -365,7 +365,7 @@ ENDPROC(native_usergs_sysret64)
/*CFI_REL_OFFSET ss,0*/
pushq_cfi %rax /* rsp */
CFI_REL_OFFSET rsp,0
pushq_cfi $(X86_EFLAGS_IF|X86_EFLAGS_BIT1) /* eflags - interrupts on */
pushq_cfi $(X86_EFLAGS_IF|X86_EFLAGS_FIXED) /* eflags - interrupts on */
/*CFI_REL_OFFSET rflags,0*/
pushq_cfi $__KERNEL_CS /* cs */
/*CFI_REL_OFFSET cs,0*/

2
arch/x86/kernel/process_32.c
View file

@ -147,7 +147,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
childregs->bp = arg;
childregs->orig_ax = -1;
childregs->cs = __KERNEL_CS | get_kernel_rpl();
childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_BIT1;
childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED;
p->fpu_counter = 0;
p->thread.io_bitmap_ptr = NULL;
memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps));

2
arch/x86/kernel/process_64.c
View file

@ -176,7 +176,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
childregs->bp = arg;
childregs->orig_ax = -1;
childregs->cs = __KERNEL_CS | get_kernel_rpl();
childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_BIT1;
childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED;
return 0;
}
*childregs = *current_pt_regs();

2
arch/x86/kernel/relocate_kernel_32.S
View file

@ -186,7 +186,7 @@ identity_mapped:
movl CP_PA_PGD(%ebx), %eax
movl %eax, %cr3
movl %cr0, %eax
orl $(1<<31), %eax
orl $X86_CR0_PG, %eax
movl %eax, %cr0
lea PAGE_SIZE(%edi), %esp
movl %edi, %eax

2
arch/x86/kvm/vmx.c
View file

@ -7942,7 +7942,7 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->host_rsp);
kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->host_rip);
vmx_set_rflags(vcpu, X86_EFLAGS_BIT1);
vmx_set_rflags(vcpu, X86_EFLAGS_FIXED);
/*
* Note that calling vmx_set_cr0 is important, even if cr0 hasn't
* actually changed, because it depends on the current state of

2
arch/x86/kvm/x86.c
View file

@ -618,7 +618,7 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP))
return 1;
if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_RDWRGSFS))
if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_FSGSBASE))
return 1;
if (is_long_mode(vcpu)) {

4
arch/x86/vdso/vdso32-setup.c
View file

@ -372,7 +372,7 @@ subsys_initcall(sysenter_setup);
/* Register vsyscall32 into the ABI table */
#include <linux/sysctl.h>
static ctl_table abi_table2[] = {
static struct ctl_table abi_table2[] = {
{
.procname = "vsyscall32",
.data = &sysctl_vsyscall32,
@ -383,7 +383,7 @@ static ctl_table abi_table2[] = {
{}
};
static ctl_table abi_root_table2[] = {
static struct ctl_table abi_root_table2[] = {
{
.procname = "abi",
.mode = 0555,

2
drivers/lguest/x86/core.c
View file

@ -700,7 +700,7 @@ void lguest_arch_setup_regs(struct lg_cpu *cpu, unsigned long start)
* interrupts are enabled. We always leave interrupts enabled while
* running the Guest.
*/
regs->eflags = X86_EFLAGS_IF | X86_EFLAGS_BIT1;
regs->eflags = X86_EFLAGS_IF | X86_EFLAGS_FIXED;
/*
* The "Extended Instruction Pointer" register says where the Guest is

3
include/uapi/linux/const.h
View file

@ -21,4 +21,7 @@
#define _AT(T,X) ((T)(X))
#endif
#define _BITUL(x) (_AC(1,UL) << (x))
#define _BITULL(x) (_AC(1,ULL) << (x))
#endif /* !(_LINUX_CONST_H) */