diff options
Diffstat (limited to 'tools/testing/selftests/vm/pkey-x86.h')
-rw-r--r-- | tools/testing/selftests/vm/pkey-x86.h | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/tools/testing/selftests/vm/pkey-x86.h b/tools/testing/selftests/vm/pkey-x86.h deleted file mode 100644 index 3be20f5d5275..000000000000 --- a/tools/testing/selftests/vm/pkey-x86.h +++ /dev/null @@ -1,181 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ - -#ifndef _PKEYS_X86_H -#define _PKEYS_X86_H - -#ifdef __i386__ - -#ifndef SYS_mprotect_key -# define SYS_mprotect_key 380 -#endif - -#ifndef SYS_pkey_alloc -# define SYS_pkey_alloc 381 -# define SYS_pkey_free 382 -#endif - -#define REG_IP_IDX REG_EIP -#define si_pkey_offset 0x14 - -#else - -#ifndef SYS_mprotect_key -# define SYS_mprotect_key 329 -#endif - -#ifndef SYS_pkey_alloc -# define SYS_pkey_alloc 330 -# define SYS_pkey_free 331 -#endif - -#define REG_IP_IDX REG_RIP -#define si_pkey_offset 0x20 - -#endif - -#ifndef PKEY_DISABLE_ACCESS -# define PKEY_DISABLE_ACCESS 0x1 -#endif - -#ifndef PKEY_DISABLE_WRITE -# define PKEY_DISABLE_WRITE 0x2 -#endif - -#define NR_PKEYS 16 -#define NR_RESERVED_PKEYS 2 /* pkey-0 and exec-only-pkey */ -#define PKEY_BITS_PER_PKEY 2 -#define HPAGE_SIZE (1UL<<21) -#define PAGE_SIZE 4096 -#define MB (1<<20) - -static inline void __page_o_noops(void) -{ - /* 8-bytes of instruction * 512 bytes = 1 page */ - asm(".rept 512 ; nopl 0x7eeeeeee(%eax) ; .endr"); -} - -static inline u64 __read_pkey_reg(void) -{ - unsigned int eax, edx; - unsigned int ecx = 0; - unsigned pkey_reg; - - asm volatile(".byte 0x0f,0x01,0xee\n\t" - : "=a" (eax), "=d" (edx) - : "c" (ecx)); - pkey_reg = eax; - return pkey_reg; -} - -static inline void __write_pkey_reg(u64 pkey_reg) -{ - unsigned int eax = pkey_reg; - unsigned int ecx = 0; - unsigned int edx = 0; - - dprintf4("%s() changing %016llx to %016llx\n", __func__, - __read_pkey_reg(), pkey_reg); - asm volatile(".byte 0x0f,0x01,0xef\n\t" - : : "a" (eax), "c" (ecx), "d" (edx)); - assert(pkey_reg == __read_pkey_reg()); -} - -static inline void __cpuid(unsigned int *eax, unsigned int *ebx, - unsigned int *ecx, unsigned int *edx) -{ - /* ecx is often an input as well as an output. */ - asm volatile( - "cpuid;" - : "=a" (*eax), - "=b" (*ebx), - "=c" (*ecx), - "=d" (*edx) - : "0" (*eax), "2" (*ecx)); -} - -/* Intel-defined CPU features, CPUID level 0x00000007:0 (ecx) */ -#define X86_FEATURE_PKU (1<<3) /* Protection Keys for Userspace */ -#define X86_FEATURE_OSPKE (1<<4) /* OS Protection Keys Enable */ - -static inline int cpu_has_pkeys(void) -{ - unsigned int eax; - unsigned int ebx; - unsigned int ecx; - unsigned int edx; - - eax = 0x7; - ecx = 0x0; - __cpuid(&eax, &ebx, &ecx, &edx); - - if (!(ecx & X86_FEATURE_PKU)) { - dprintf2("cpu does not have PKU\n"); - return 0; - } - if (!(ecx & X86_FEATURE_OSPKE)) { - dprintf2("cpu does not have OSPKE\n"); - return 0; - } - return 1; -} - -static inline u32 pkey_bit_position(int pkey) -{ - return pkey * PKEY_BITS_PER_PKEY; -} - -#define XSTATE_PKEY_BIT (9) -#define XSTATE_PKEY 0x200 - -int pkey_reg_xstate_offset(void) -{ - unsigned int eax; - unsigned int ebx; - unsigned int ecx; - unsigned int edx; - int xstate_offset; - int xstate_size; - unsigned long XSTATE_CPUID = 0xd; - int leaf; - - /* assume that XSTATE_PKEY is set in XCR0 */ - leaf = XSTATE_PKEY_BIT; - { - eax = XSTATE_CPUID; - ecx = leaf; - __cpuid(&eax, &ebx, &ecx, &edx); - - if (leaf == XSTATE_PKEY_BIT) { - xstate_offset = ebx; - xstate_size = eax; - } - } - - if (xstate_size == 0) { - printf("could not find size/offset of PKEY in xsave state\n"); - return 0; - } - - return xstate_offset; -} - -static inline int get_arch_reserved_keys(void) -{ - return NR_RESERVED_PKEYS; -} - -void expect_fault_on_read_execonly_key(void *p1, int pkey) -{ - int ptr_contents; - - ptr_contents = read_ptr(p1); - dprintf2("ptr (%p) contents@%d: %x\n", p1, __LINE__, ptr_contents); - expected_pkey_fault(pkey); -} - -void *malloc_pkey_with_mprotect_subpage(long size, int prot, u16 pkey) -{ - return PTR_ERR_ENOTSUP; -} - -#endif /* _PKEYS_X86_H */ |