^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef _ASM_POWERPC_KUP_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define _ASM_POWERPC_KUP_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #define KUAP_READ 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #define KUAP_WRITE 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #define KUAP_READ_WRITE (KUAP_READ | KUAP_WRITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * For prevent_user_access() only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Use the current saved situation instead of the to/from/size params.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Used on book3s/32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define KUAP_CURRENT_READ 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define KUAP_CURRENT_WRITE 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define KUAP_CURRENT (KUAP_CURRENT_READ | KUAP_CURRENT_WRITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #ifdef CONFIG_PPC_BOOK3S_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/book3s/64/kup-radix.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #ifdef CONFIG_PPC_8xx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/nohash/32/kup-8xx.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #ifdef CONFIG_PPC_BOOK3S_32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/book3s/32/kup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #ifdef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #ifndef CONFIG_PPC_KUAP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .macro kuap_save_and_lock sp, thread, gpr1, gpr2, gpr3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .macro kuap_restore sp, current, gpr1, gpr2, gpr3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .macro kuap_check current, gpr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .macro kuap_check_amr gpr1, gpr2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #else /* !__ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <linux/pgtable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) void setup_kup(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #ifdef CONFIG_PPC_KUEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) void setup_kuep(bool disabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static inline void setup_kuep(bool disabled) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #endif /* CONFIG_PPC_KUEP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #ifdef CONFIG_PPC_KUAP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) void setup_kuap(bool disabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static inline void setup_kuap(bool disabled) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static inline bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) bad_kuap_fault(struct pt_regs *regs, unsigned long address, bool is_write)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static inline void kuap_check_amr(void) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * book3s/64/kup-radix.h defines these functions for the !KUAP case to flush
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * the L1D cache after user accesses. Only include the empty stubs for other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * platforms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #ifndef CONFIG_PPC_BOOK3S_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static inline void allow_user_access(void __user *to, const void __user *from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) unsigned long size, unsigned long dir) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static inline void prevent_user_access(void __user *to, const void __user *from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) unsigned long size, unsigned long dir) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static inline unsigned long prevent_user_access_return(void) { return 0UL; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static inline void restore_user_access(unsigned long flags) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #endif /* CONFIG_PPC_BOOK3S_64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #endif /* CONFIG_PPC_KUAP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static inline void allow_read_from_user(const void __user *from, unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) allow_user_access(NULL, from, size, KUAP_READ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static inline void allow_write_to_user(void __user *to, unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) allow_user_access(to, NULL, size, KUAP_WRITE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static inline void allow_read_write_user(void __user *to, const void __user *from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) allow_user_access(to, from, size, KUAP_READ_WRITE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static inline void prevent_read_from_user(const void __user *from, unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) prevent_user_access(NULL, from, size, KUAP_READ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static inline void prevent_write_to_user(void __user *to, unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) prevent_user_access(to, NULL, size, KUAP_WRITE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static inline void prevent_read_write_user(void __user *to, const void __user *from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) prevent_user_access(to, from, size, KUAP_READ_WRITE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static inline void prevent_current_access_user(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static inline void prevent_current_read_from_user(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT_READ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static inline void prevent_current_write_to_user(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT_WRITE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #endif /* !__ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #endif /* _ASM_POWERPC_KUAP_H_ */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags