mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.7 KiB
56 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef _ASM_X86_PROCESSOR_FLAGS_H |
|
#define _ASM_X86_PROCESSOR_FLAGS_H |
|
|
|
#include <uapi/asm/processor-flags.h> |
|
#include <linux/mem_encrypt.h> |
|
|
|
#ifdef CONFIG_VM86 |
|
#define X86_VM_MASK X86_EFLAGS_VM |
|
#else |
|
#define X86_VM_MASK 0 /* No VM86 support */ |
|
#endif |
|
|
|
/* |
|
* CR3's layout varies depending on several things. |
|
* |
|
* If CR4.PCIDE is set (64-bit only), then CR3[11:0] is the address space ID. |
|
* If PAE is enabled, then CR3[11:5] is part of the PDPT address |
|
* (i.e. it's 32-byte aligned, not page-aligned) and CR3[4:0] is ignored. |
|
* Otherwise (non-PAE, non-PCID), CR3[3] is PWT, CR3[4] is PCD, and |
|
* CR3[2:0] and CR3[11:5] are ignored. |
|
* |
|
* In all cases, Linux puts zeros in the low ignored bits and in PWT and PCD. |
|
* |
|
* CR3[63] is always read as zero. If CR4.PCIDE is set, then CR3[63] may be |
|
* written as 1 to prevent the write to CR3 from flushing the TLB. |
|
* |
|
* On systems with SME, one bit (in a variable position!) is stolen to indicate |
|
* that the top-level paging structure is encrypted. |
|
* |
|
* All of the remaining bits indicate the physical address of the top-level |
|
* paging structure. |
|
* |
|
* CR3_ADDR_MASK is the mask used by read_cr3_pa(). |
|
*/ |
|
#ifdef CONFIG_X86_64 |
|
/* Mask off the address space ID and SME encryption bits. */ |
|
#define CR3_ADDR_MASK __sme_clr(0x7FFFFFFFFFFFF000ull) |
|
#define CR3_PCID_MASK 0xFFFull |
|
#define CR3_NOFLUSH BIT_ULL(63) |
|
|
|
#else |
|
/* |
|
* CR3_ADDR_MASK needs at least bits 31:5 set on PAE systems, and we save |
|
* a tiny bit of code size by setting all the bits. |
|
*/ |
|
#define CR3_ADDR_MASK 0xFFFFFFFFull |
|
#define CR3_PCID_MASK 0ull |
|
#define CR3_NOFLUSH 0 |
|
#endif |
|
|
|
#ifdef CONFIG_PAGE_TABLE_ISOLATION |
|
# define X86_CR3_PTI_PCID_USER_BIT 11 |
|
#endif |
|
|
|
#endif /* _ASM_X86_PROCESSOR_FLAGS_H */
|
|
|