Contributors: 22
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Catalin Marinas |
463 |
34.92% |
9 |
11.54% |
| Mark Brown |
336 |
25.34% |
12 |
15.38% |
| Dave P Martin |
135 |
10.18% |
10 |
12.82% |
| Will Deacon |
105 |
7.92% |
11 |
14.10% |
| Steve Capper |
55 |
4.15% |
6 |
7.69% |
| Peter Collingbourne |
53 |
4.00% |
6 |
7.69% |
| Yury Norov |
37 |
2.79% |
1 |
1.28% |
| Kees Cook |
25 |
1.89% |
2 |
2.56% |
| Vincenzo Frascino |
24 |
1.81% |
3 |
3.85% |
| Kristina Martšenko |
18 |
1.36% |
3 |
3.85% |
| Francis Laniel |
11 |
0.83% |
1 |
1.28% |
| Julien Thierry |
11 |
0.83% |
1 |
1.28% |
| Laura Abbott |
9 |
0.68% |
1 |
1.28% |
| Mark Rutland |
9 |
0.68% |
3 |
3.85% |
| Christophe Leroy |
6 |
0.45% |
1 |
1.28% |
| Ard Biesheuvel |
6 |
0.45% |
2 |
2.56% |
| James Morse |
6 |
0.45% |
1 |
1.28% |
| Chris Redmon |
5 |
0.38% |
1 |
1.28% |
| Marc Zyngier |
4 |
0.30% |
1 |
1.28% |
| Daniel Kiss |
3 |
0.23% |
1 |
1.28% |
| Paul Walmsley |
3 |
0.23% |
1 |
1.28% |
| Thomas Gleixner |
2 |
0.15% |
1 |
1.28% |
| Total |
1326 |
|
78 |
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Based on arch/arm/include/asm/processor.h
*
* Copyright (C) 1995-1999 Russell King
* Copyright (C) 2012 ARM Ltd.
*/
#ifndef __ASM_PROCESSOR_H
#define __ASM_PROCESSOR_H
/*
* On arm64 systems, unaligned accesses by the CPU are cheap, and so there is
* no point in shifting all network buffers by 2 bytes just to make some IP
* header fields appear aligned in memory, potentially sacrificing some DMA
* performance on some platforms.
*/
#define NET_IP_ALIGN 0
#define MTE_CTRL_GCR_USER_EXCL_SHIFT 0
#define MTE_CTRL_GCR_USER_EXCL_MASK 0xffff
#define MTE_CTRL_TCF_SYNC (1UL << 16)
#define MTE_CTRL_TCF_ASYNC (1UL << 17)
#define MTE_CTRL_TCF_ASYMM (1UL << 18)
#ifndef __ASSEMBLY__
#include <linux/build_bug.h>
#include <linux/cache.h>
#include <linux/init.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/thread_info.h>
#include <vdso/processor.h>
#include <asm/alternative.h>
#include <asm/cpufeature.h>
#include <asm/hw_breakpoint.h>
#include <asm/kasan.h>
#include <asm/lse.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pointer_auth.h>
#include <asm/ptrace.h>
#include <asm/spectre.h>
#include <asm/types.h>
/*
* TASK_SIZE - the maximum size of a user space task.
* TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area.
*/
#define DEFAULT_MAP_WINDOW_64 (UL(1) << VA_BITS_MIN)
#define TASK_SIZE_64 (UL(1) << vabits_actual)
#define TASK_SIZE_MAX (UL(1) << VA_BITS)
#ifdef CONFIG_COMPAT
#if defined(CONFIG_ARM64_64K_PAGES) && defined(CONFIG_KUSER_HELPERS)
/*
* With CONFIG_ARM64_64K_PAGES enabled, the last page is occupied
* by the compat vectors page.
*/
#define TASK_SIZE_32 UL(0x100000000)
#else
#define TASK_SIZE_32 (UL(0x100000000) - PAGE_SIZE)
#endif /* CONFIG_ARM64_64K_PAGES */
#define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \
TASK_SIZE_32 : TASK_SIZE_64)
#define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \
TASK_SIZE_32 : TASK_SIZE_64)
#define DEFAULT_MAP_WINDOW (test_thread_flag(TIF_32BIT) ? \
TASK_SIZE_32 : DEFAULT_MAP_WINDOW_64)
#else
#define TASK_SIZE TASK_SIZE_64
#define DEFAULT_MAP_WINDOW DEFAULT_MAP_WINDOW_64
#endif /* CONFIG_COMPAT */
#ifdef CONFIG_ARM64_FORCE_52BIT
#define STACK_TOP_MAX TASK_SIZE_64
#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 4))
#else
#define STACK_TOP_MAX DEFAULT_MAP_WINDOW_64
#define TASK_UNMAPPED_BASE (PAGE_ALIGN(DEFAULT_MAP_WINDOW / 4))
#endif /* CONFIG_ARM64_FORCE_52BIT */
#ifdef CONFIG_COMPAT
#define AARCH32_VECTORS_BASE 0xffff0000
#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
AARCH32_VECTORS_BASE : STACK_TOP_MAX)
#else
#define STACK_TOP STACK_TOP_MAX
#endif /* CONFIG_COMPAT */
#ifndef CONFIG_ARM64_FORCE_52BIT
#define arch_get_mmap_end(addr, len, flags) \
(((addr) > DEFAULT_MAP_WINDOW) ? TASK_SIZE : DEFAULT_MAP_WINDOW)
#define arch_get_mmap_base(addr, base) ((addr > DEFAULT_MAP_WINDOW) ? \
base + TASK_SIZE - DEFAULT_MAP_WINDOW :\
base)
#endif /* CONFIG_ARM64_FORCE_52BIT */
extern phys_addr_t arm64_dma_phys_limit;
#define ARCH_LOW_ADDRESS_LIMIT (arm64_dma_phys_limit - 1)
struct debug_info {
#ifdef CONFIG_HAVE_HW_BREAKPOINT
/* Have we suspended stepping by a debugger? */
int suspended_step;
/* Allow breakpoints and watchpoints to be disabled for this thread. */
int bps_disabled;
int wps_disabled;
/* Hardware breakpoints pinned to this task. */
struct perf_event *hbp_break[ARM_MAX_BRP];
struct perf_event *hbp_watch[ARM_MAX_WRP];
#endif
};
enum vec_type {
ARM64_VEC_SVE = 0,
ARM64_VEC_SME,
ARM64_VEC_MAX,
};
struct cpu_context {
unsigned long x19;
unsigned long x20;
unsigned long x21;
unsigned long x22;
unsigned long x23;
unsigned long x24;
unsigned long x25;
unsigned long x26;
unsigned long x27;
unsigned long x28;
unsigned long fp;
unsigned long sp;
unsigned long pc;
};
struct thread_struct {
struct cpu_context cpu_context; /* cpu context */
/*
* Whitelisted fields for hardened usercopy:
* Maintainers must ensure manually that this contains no
* implicit padding.
*/
struct {
unsigned long tp_value; /* TLS register */
unsigned long tp2_value;
struct user_fpsimd_state fpsimd_state;
} uw;
unsigned int fpsimd_cpu;
void *sve_state; /* SVE registers, if any */
void *za_state; /* ZA register, if any */
unsigned int vl[ARM64_VEC_MAX]; /* vector length */
unsigned int vl_onexec[ARM64_VEC_MAX]; /* vl after next exec */
unsigned long fault_address; /* fault info */
unsigned long fault_code; /* ESR_EL1 value */
struct debug_info debug; /* debugging */
#ifdef CONFIG_ARM64_PTR_AUTH
struct ptrauth_keys_user keys_user;
#ifdef CONFIG_ARM64_PTR_AUTH_KERNEL
struct ptrauth_keys_kernel keys_kernel;
#endif
#endif
#ifdef CONFIG_ARM64_MTE
u64 mte_ctrl;
#endif
u64 sctlr_user;
u64 svcr;
u64 tpidr2_el0;
};
static inline unsigned int thread_get_vl(struct thread_struct *thread,
enum vec_type type)
{
return thread->vl[type];
}
static inline unsigned int thread_get_sve_vl(struct thread_struct *thread)
{
return thread_get_vl(thread, ARM64_VEC_SVE);
}
static inline unsigned int thread_get_sme_vl(struct thread_struct *thread)
{
return thread_get_vl(thread, ARM64_VEC_SME);
}
static inline unsigned int thread_get_cur_vl(struct thread_struct *thread)
{
if (system_supports_sme() && (thread->svcr & SVCR_SM_MASK))
return thread_get_sme_vl(thread);
else
return thread_get_sve_vl(thread);
}
unsigned int task_get_vl(const struct task_struct *task, enum vec_type type);
void task_set_vl(struct task_struct *task, enum vec_type type,
unsigned long vl);
void task_set_vl_onexec(struct task_struct *task, enum vec_type type,
unsigned long vl);
unsigned int task_get_vl_onexec(const struct task_struct *task,
enum vec_type type);
static inline unsigned int task_get_sve_vl(const struct task_struct *task)
{
return task_get_vl(task, ARM64_VEC_SVE);
}
static inline unsigned int task_get_sme_vl(const struct task_struct *task)
{
return task_get_vl(task, ARM64_VEC_SME);
}
static inline void task_set_sve_vl(struct task_struct *task, unsigned long vl)
{
task_set_vl(task, ARM64_VEC_SVE, vl);
}
static inline unsigned int task_get_sve_vl_onexec(const struct task_struct *task)
{
return task_get_vl_onexec(task, ARM64_VEC_SVE);
}
static inline void task_set_sve_vl_onexec(struct task_struct *task,
unsigned long vl)
{
task_set_vl_onexec(task, ARM64_VEC_SVE, vl);
}
#define SCTLR_USER_MASK \
(SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | SCTLR_ELx_ENDA | SCTLR_ELx_ENDB | \
SCTLR_EL1_TCF0_MASK)
static inline void arch_thread_struct_whitelist(unsigned long *offset,
unsigned long *size)
{
/* Verify that there is no padding among the whitelisted fields: */
BUILD_BUG_ON(sizeof_field(struct thread_struct, uw) !=
sizeof_field(struct thread_struct, uw.tp_value) +
sizeof_field(struct thread_struct, uw.tp2_value) +
sizeof_field(struct thread_struct, uw.fpsimd_state));
*offset = offsetof(struct thread_struct, uw);
*size = sizeof_field(struct thread_struct, uw);
}
#ifdef CONFIG_COMPAT
#define task_user_tls(t) \
({ \
unsigned long *__tls; \
if (is_compat_thread(task_thread_info(t))) \
__tls = &(t)->thread.uw.tp2_value; \
else \
__tls = &(t)->thread.uw.tp_value; \
__tls; \
})
#else
#define task_user_tls(t) (&(t)->thread.uw.tp_value)
#endif
/* Sync TPIDR_EL0 back to thread_struct for current */
void tls_preserve_current_state(void);
#define INIT_THREAD { \
.fpsimd_cpu = NR_CPUS, \
}
static inline void start_thread_common(struct pt_regs *regs, unsigned long pc)
{
s32 previous_syscall = regs->syscallno;
memset(regs, 0, sizeof(*regs));
regs->syscallno = previous_syscall;
regs->pc = pc;
if (system_uses_irq_prio_masking())
regs->pmr_save = GIC_PRIO_IRQON;
}
static inline void start_thread(struct pt_regs *regs, unsigned long pc,
unsigned long sp)
{
start_thread_common(regs, pc);
regs->pstate = PSR_MODE_EL0t;
spectre_v4_enable_task_mitigation(current);
regs->sp = sp;
}
#ifdef CONFIG_COMPAT
static inline void compat_start_thread(struct pt_regs *regs, unsigned long pc,
unsigned long sp)
{
start_thread_common(regs, pc);
regs->pstate = PSR_AA32_MODE_USR;
if (pc & 1)
regs->pstate |= PSR_AA32_T_BIT;
#ifdef __AARCH64EB__
regs->pstate |= PSR_AA32_E_BIT;
#endif
spectre_v4_enable_task_mitigation(current);
regs->compat_sp = sp;
}
#endif
static inline bool is_ttbr0_addr(unsigned long addr)
{
/* entry assembly clears tags for TTBR0 addrs */
return addr < TASK_SIZE;
}
static inline bool is_ttbr1_addr(unsigned long addr)
{
/* TTBR1 addresses may have a tag if KASAN_SW_TAGS is in use */
return arch_kasan_reset_tag(addr) >= PAGE_OFFSET;
}
/* Forward declaration, a strange C thing */
struct task_struct;
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
unsigned long __get_wchan(struct task_struct *p);
void update_sctlr_el1(u64 sctlr);
/* Thread switching */
extern struct task_struct *cpu_switch_to(struct task_struct *prev,
struct task_struct *next);
#define task_pt_regs(p) \
((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
#define KSTK_EIP(tsk) ((unsigned long)task_pt_regs(tsk)->pc)
#define KSTK_ESP(tsk) user_stack_pointer(task_pt_regs(tsk))
/*
* Prefetching support
*/
#define ARCH_HAS_PREFETCH
static inline void prefetch(const void *ptr)
{
asm volatile("prfm pldl1keep, %a0\n" : : "p" (ptr));
}
#define ARCH_HAS_PREFETCHW
static inline void prefetchw(const void *ptr)
{
asm volatile("prfm pstl1keep, %a0\n" : : "p" (ptr));
}
#define ARCH_HAS_SPINLOCK_PREFETCH
static inline void spin_lock_prefetch(const void *ptr)
{
asm volatile(ARM64_LSE_ATOMIC_INSN(
"prfm pstl1strm, %a0",
"nop") : : "p" (ptr));
}
extern unsigned long __ro_after_init signal_minsigstksz; /* sigframe size */
extern void __init minsigstksz_setup(void);
/*
* Not at the top of the file due to a direct #include cycle between
* <asm/fpsimd.h> and <asm/processor.h>. Deferring this #include
* ensures that contents of processor.h are visible to fpsimd.h even if
* processor.h is included first.
*
* These prctl helpers are the only things in this file that require
* fpsimd.h. The core code expects them to be in this header.
*/
#include <asm/fpsimd.h>
/* Userspace interface for PR_S[MV]E_{SET,GET}_VL prctl()s: */
#define SVE_SET_VL(arg) sve_set_current_vl(arg)
#define SVE_GET_VL() sve_get_current_vl()
#define SME_SET_VL(arg) sme_set_current_vl(arg)
#define SME_GET_VL() sme_get_current_vl()
/* PR_PAC_RESET_KEYS prctl */
#define PAC_RESET_KEYS(tsk, arg) ptrauth_prctl_reset_keys(tsk, arg)
/* PR_PAC_{SET,GET}_ENABLED_KEYS prctl */
#define PAC_SET_ENABLED_KEYS(tsk, keys, enabled) \
ptrauth_set_enabled_keys(tsk, keys, enabled)
#define PAC_GET_ENABLED_KEYS(tsk) ptrauth_get_enabled_keys(tsk)
#ifdef CONFIG_ARM64_TAGGED_ADDR_ABI
/* PR_{SET,GET}_TAGGED_ADDR_CTRL prctl */
long set_tagged_addr_ctrl(struct task_struct *task, unsigned long arg);
long get_tagged_addr_ctrl(struct task_struct *task);
#define SET_TAGGED_ADDR_CTRL(arg) set_tagged_addr_ctrl(current, arg)
#define GET_TAGGED_ADDR_CTRL() get_tagged_addr_ctrl(current)
#endif
/*
* For CONFIG_GCC_PLUGIN_STACKLEAK
*
* These need to be macros because otherwise we get stuck in a nightmare
* of header definitions for the use of task_stack_page.
*/
/*
* The top of the current task's task stack
*/
#define current_top_of_stack() ((unsigned long)current->stack + THREAD_SIZE)
#define on_thread_stack() (on_task_stack(current, current_stack_pointer, 1, NULL))
#endif /* __ASSEMBLY__ */
#endif /* __ASM_PROCESSOR_H */