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processor-flags.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _ASM_X86_PROCESSOR_FLAGS_H #define _ASM_X86_PROCESSOR_FLAGS_H /* Various flags defined: can be included from assembler. */ #include <linux/const.h> /* * EFLAGS bits */ #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_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_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_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_BITS 12 #define X86_CR3_PCID_MASK (_AC((1UL << X86_CR3_PCID_BITS) - 1, UL)) #define X86_CR3_LAM_U57_BIT 61 /* Activate LAM for userspace, 62:57 bits masked */ #define X86_CR3_LAM_U57 _BITULL(X86_CR3_LAM_U57_BIT) #define X86_CR3_LAM_U48_BIT 62 /* Activate LAM for userspace, 62:48 bits masked */ #define X86_CR3_LAM_U48 _BITULL(X86_CR3_LAM_U48_BIT) #define X86_CR3_PCID_NOFLUSH_BIT 63 /* Preserve old PCID */ #define X86_CR3_PCID_NOFLUSH _BITULL(X86_CR3_PCID_NOFLUSH_BIT) /* * Intel CPU features in CR4 */ #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_UMIP_BIT 11 /* enable UMIP support */ #define X86_CR4_UMIP _BITUL(X86_CR4_UMIP_BIT) #define X86_CR4_LA57_BIT 12 /* enable 5-level page tables */ #define X86_CR4_LA57 _BITUL(X86_CR4_LA57_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) #define X86_CR4_PKE_BIT 22 /* enable Protection Keys support */ #define X86_CR4_PKE _BITUL(X86_CR4_PKE_BIT) #define X86_CR4_CET_BIT 23 /* enable Control-flow Enforcement Technology */ #define X86_CR4_CET _BITUL(X86_CR4_CET_BIT) #define X86_CR4_LAM_SUP_BIT 28 /* LAM for supervisor pointers */ #define X86_CR4_LAM_SUP _BITUL(X86_CR4_LAM_SUP_BIT) #ifdef __x86_64__ #define X86_CR4_FRED_BIT 32 /* enable FRED kernel entry */ #define X86_CR4_FRED _BITUL(X86_CR4_FRED_BIT) #else #define X86_CR4_FRED (0) #endif /* * x86-64 Task Priority Register, CR8 */ #define X86_CR8_TPR _AC(0x0000000f,UL) /* task priority register */ /* * AMD and Transmeta use MSRs for configuration; see <asm/msr-index.h> */ /* * NSC/Cyrix CPU configuration register indexes */ #define CX86_PCR0 0x20 #define CX86_GCR 0xb8 #define CX86_CCR0 0xc0 #define CX86_CCR1 0xc1 #define CX86_CCR2 0xc2 #define CX86_CCR3 0xc3 #define CX86_CCR4 0xe8 #define CX86_CCR5 0xe9 #define CX86_CCR6 0xea #define CX86_CCR7 0xeb #define CX86_PCR1 0xf0 #define CX86_DIR0 0xfe #define CX86_DIR1 0xff #define CX86_ARR_BASE 0xc4 #define CX86_RCR_BASE 0xdc #define CR0_STATE (X86_CR0_PE | X86_CR0_MP | X86_CR0_ET | \ X86_CR0_NE | X86_CR0_WP | X86_CR0_AM | \ X86_CR0_PG) #endif /* _ASM_X86_PROCESSOR_FLAGS_H */