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Diffstat (limited to 'arch/powerpc/include/asm/processor.h')
-rw-r--r--arch/powerpc/include/asm/processor.h316
1 files changed, 123 insertions, 193 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index ee58526cb6c2..f156bdb43e2b 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -1,15 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_PROCESSOR_H
#define _ASM_POWERPC_PROCESSOR_H
/*
* Copyright (C) 2001 PPC 64 Team, IBM Corp
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
+#include <vdso/processor.h>
+
#include <asm/reg.h>
#ifdef CONFIG_VSX
@@ -31,16 +29,16 @@
#ifdef CONFIG_PPC64
/* Default SMT priority is set to 3. Use 11- 13bits to save priority. */
#define PPR_PRIORITY 3
-#ifdef __ASSEMBLY__
+#ifdef __ASSEMBLER__
#define DEFAULT_PPR (PPR_PRIORITY << 50)
#else
#define DEFAULT_PPR ((u64)PPR_PRIORITY << 50)
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
#endif /* CONFIG_PPC64 */
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
#include <linux/types.h>
-#include <asm/thread_info.h>
+#include <linux/thread_info.h>
#include <asm/ptrace.h>
#include <asm/hw_breakpoint.h>
@@ -67,119 +65,16 @@ extern int _chrp_type;
#endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */
-/* Macros for adjusting thread priority (hardware multi-threading) */
-#define HMT_very_low() asm volatile("or 31,31,31 # very low priority")
-#define HMT_low() asm volatile("or 1,1,1 # low priority")
-#define HMT_medium_low() asm volatile("or 6,6,6 # medium low priority")
-#define HMT_medium() asm volatile("or 2,2,2 # medium priority")
-#define HMT_medium_high() asm volatile("or 5,5,5 # medium high priority")
-#define HMT_high() asm volatile("or 3,3,3 # high priority")
-
#ifdef __KERNEL__
-struct task_struct;
-void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
-void release_thread(struct task_struct *);
-
-#ifdef CONFIG_PPC32
-
-#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START
-#error User TASK_SIZE overlaps with KERNEL_START address
-#endif
-#define TASK_SIZE (CONFIG_TASK_SIZE)
-
-/* This decides where the kernel will search for a free chunk of vm
- * space during mmap's.
- */
-#define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
-#endif
-
#ifdef CONFIG_PPC64
-/*
- * 64-bit user address space can have multiple limits
- * For now supported values are:
- */
-#define TASK_SIZE_64TB (0x0000400000000000UL)
-#define TASK_SIZE_128TB (0x0000800000000000UL)
-#define TASK_SIZE_512TB (0x0002000000000000UL)
-#define TASK_SIZE_1PB (0x0004000000000000UL)
-#define TASK_SIZE_2PB (0x0008000000000000UL)
-/*
- * With 52 bits in the address we can support
- * upto 4PB of range.
- */
-#define TASK_SIZE_4PB (0x0010000000000000UL)
-
-/*
- * For now 512TB is only supported with book3s and 64K linux page size.
- */
-#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_64K_PAGES)
-/*
- * Max value currently used:
- */
-#define TASK_SIZE_USER64 TASK_SIZE_4PB
-#define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_128TB
-#define TASK_CONTEXT_SIZE TASK_SIZE_512TB
+#include <asm/task_size_64.h>
#else
-#define TASK_SIZE_USER64 TASK_SIZE_64TB
-#define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_64TB
-/*
- * We don't need to allocate extended context ids for 4K page size, because
- * we limit the max effective address on this config to 64TB.
- */
-#define TASK_CONTEXT_SIZE TASK_SIZE_64TB
-#endif
-
-/*
- * 32-bit user address space is 4GB - 1 page
- * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT
- */
-#define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE))
-
-#define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \
- TASK_SIZE_USER32 : TASK_SIZE_USER64)
-#define TASK_SIZE TASK_SIZE_OF(current)
-/* This decides where the kernel will search for a free chunk of vm
- * space during mmap's.
- */
-#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
-#define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(DEFAULT_MAP_WINDOW_USER64 / 4))
-
-#define TASK_UNMAPPED_BASE ((is_32bit_task()) ? \
- TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 )
-#endif
-
-/*
- * Initial task size value for user applications. For book3s 64 we start
- * with 128TB and conditionally enable upto 512TB
- */
-#ifdef CONFIG_PPC_BOOK3S_64
-#define DEFAULT_MAP_WINDOW ((is_32bit_task()) ? \
- TASK_SIZE_USER32 : DEFAULT_MAP_WINDOW_USER64)
-#else
-#define DEFAULT_MAP_WINDOW TASK_SIZE
+#include <asm/task_size_32.h>
#endif
-#ifdef __powerpc64__
-
-#define STACK_TOP_USER64 DEFAULT_MAP_WINDOW_USER64
-#define STACK_TOP_USER32 TASK_SIZE_USER32
-
-#define STACK_TOP (is_32bit_task() ? \
- STACK_TOP_USER32 : STACK_TOP_USER64)
-
-#define STACK_TOP_MAX TASK_SIZE_USER64
-
-#else /* __powerpc64__ */
-
-#define STACK_TOP TASK_SIZE
-#define STACK_TOP_MAX STACK_TOP
-
-#endif /* __powerpc64__ */
-
-typedef struct {
- unsigned long seg;
-} mm_segment_t;
+struct task_struct;
+void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
#define TS_FPR(i) fp_state.fpr[i][TS_FPROFFSET]
#define TS_CKFPR(i) ckfp_state.fpr[i][TS_FPROFFSET]
@@ -242,30 +137,43 @@ struct thread_struct {
unsigned long ksp_vsid;
#endif
struct pt_regs *regs; /* Pointer to saved register state */
- mm_segment_t addr_limit; /* for get_fs() validation */
#ifdef CONFIG_BOOKE
/* BookE base exception scratch space; align on cacheline */
unsigned long normsave[8] ____cacheline_aligned;
#endif
#ifdef CONFIG_PPC32
void *pgdir; /* root of page-table tree */
- unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */
+#ifdef CONFIG_PPC_RTAS
+ unsigned long rtas_sp; /* stack pointer for when in RTAS */
+#endif
+#if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_PPC_KUAP)
+ unsigned long kuap; /* opened segments for user access */
+#endif
+ unsigned long srr0;
+ unsigned long srr1;
+ unsigned long dar;
+ unsigned long dsisr;
+#ifdef CONFIG_PPC_BOOK3S_32
+ unsigned long r0, r3, r4, r5, r6, r8, r9, r11;
+ unsigned long lr, ctr;
+ unsigned long sr0;
+#endif
+#endif /* CONFIG_PPC32 */
+#if defined(CONFIG_BOOKE) && defined(CONFIG_PPC_KUAP)
+ unsigned long pid; /* value written in PID reg. at interrupt exit */
#endif
/* Debug Registers */
struct debug_reg debug;
+#ifdef CONFIG_PPC_FPU_REGS
struct thread_fp_state fp_state;
struct thread_fp_state *fp_save_area;
+#endif
int fpexc_mode; /* floating-point exception mode */
unsigned int align_ctl; /* alignment handling control */
#ifdef CONFIG_HAVE_HW_BREAKPOINT
- struct perf_event *ptrace_bps[HBP_NUM];
- /*
- * Helps identify source of single-step exception and subsequent
- * hw-breakpoint enablement
- */
- struct perf_event *last_hit_ubp;
+ struct perf_event *ptrace_bps[HBP_NUM_MAX];
#endif /* CONFIG_HAVE_HW_BREAKPOINT */
- struct arch_hw_breakpoint hw_brk; /* info on the hardware breakpoint */
+ struct arch_hw_breakpoint hw_brk[HBP_NUM_MAX]; /* hardware breakpoint info */
unsigned long trap_nr; /* last trap # on this thread */
u8 load_slb; /* Ages out SLB preload cache entries */
u8 load_fp;
@@ -281,8 +189,10 @@ struct thread_struct {
int used_vsr; /* set if process has used VSX */
#endif /* CONFIG_VSX */
#ifdef CONFIG_SPE
- unsigned long evr[32]; /* upper 32-bits of SPE regs */
- u64 acc; /* Accumulator */
+ struct_group(spe,
+ unsigned long evr[32]; /* upper 32-bits of SPE regs */
+ u64 acc; /* Accumulator */
+ );
unsigned long spefscr; /* SPE & eFP status */
unsigned long spefscr_last; /* SPEFSCR value on last prctl
call or trap return */
@@ -298,6 +208,7 @@ struct thread_struct {
unsigned long tm_tar;
unsigned long tm_ppr;
unsigned long tm_dscr;
+ unsigned long tm_amr;
/*
* Checkpointed FP and VSX 0-31 register set.
@@ -312,11 +223,6 @@ struct thread_struct {
struct thread_vr_state ckvr_state; /* Checkpointed VR state */
unsigned long ckvrsave; /* Checkpointed VRSAVE */
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
-#ifdef CONFIG_PPC_MEM_KEYS
- unsigned long amr;
- unsigned long iamr;
- unsigned long uamor;
-#endif
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
void* kvm_shadow_vcpu; /* KVM internal data */
#endif /* CONFIG_KVM_BOOK3S_32_HANDLER */
@@ -350,15 +256,19 @@ struct thread_struct {
unsigned mmcr0;
unsigned used_ebb;
- unsigned int used_vas;
+ unsigned long mmcr3;
+ unsigned long sier2;
+ unsigned long sier3;
+ unsigned long hashkeyr;
+ unsigned long dexcr;
+ unsigned long dexcr_onexec; /* Reset value to load on exec */
#endif
};
#define ARCH_MIN_TASKALIGN 16
#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
-#define INIT_SP_LIMIT \
- (_ALIGN_UP(sizeof(init_thread_info), 16) + (unsigned long) &init_stack)
+#define INIT_SP_LIMIT ((unsigned long)&init_stack)
#ifdef CONFIG_SPE
#define SPEFSCR_INIT \
@@ -368,28 +278,39 @@ struct thread_struct {
#define SPEFSCR_INIT
#endif
-#ifdef CONFIG_PPC32
+#ifdef CONFIG_PPC_BOOK3S_32
+#define SR0_INIT .sr0 = IS_ENABLED(CONFIG_PPC_KUEP) ? SR_NX : 0,
+#else
+#define SR0_INIT
+#endif
+
+#if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_PPC_KUAP)
#define INIT_THREAD { \
.ksp = INIT_SP, \
- .ksp_limit = INIT_SP_LIMIT, \
- .addr_limit = KERNEL_DS, \
.pgdir = swapper_pg_dir, \
+ .kuap = ~0UL, /* KUAP_NONE */ \
.fpexc_mode = MSR_FE0 | MSR_FE1, \
SPEFSCR_INIT \
+ SR0_INIT \
+}
+#elif defined(CONFIG_PPC32)
+#define INIT_THREAD { \
+ .ksp = INIT_SP, \
+ .pgdir = swapper_pg_dir, \
+ .fpexc_mode = MSR_FE0 | MSR_FE1, \
+ SPEFSCR_INIT \
+ SR0_INIT \
}
#else
#define INIT_THREAD { \
.ksp = INIT_SP, \
- .regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \
- .addr_limit = KERNEL_DS, \
.fpexc_mode = 0, \
- .fscr = FSCR_TAR | FSCR_EBB \
}
#endif
-#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.regs)
+#define task_pt_regs(tsk) ((tsk)->thread.regs)
-unsigned long get_wchan(struct task_struct *p);
+unsigned long __get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
#define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0)
@@ -413,6 +334,16 @@ extern int set_endian(struct task_struct *tsk, unsigned int val);
extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr);
extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val);
+#ifdef CONFIG_PPC_BOOK3S_64
+
+#define PPC_GET_DEXCR_ASPECT(tsk, asp) get_dexcr_prctl((tsk), (asp))
+#define PPC_SET_DEXCR_ASPECT(tsk, asp, val) set_dexcr_prctl((tsk), (asp), (val))
+
+int get_dexcr_prctl(struct task_struct *tsk, unsigned long asp);
+int set_dexcr_prctl(struct task_struct *tsk, unsigned long asp, unsigned long val);
+
+#endif
+
extern void load_fp_state(struct thread_fp_state *fp);
extern void store_fp_state(struct thread_fp_state *fp);
extern void load_vr_state(struct thread_vr_state *vr);
@@ -429,41 +360,45 @@ static inline unsigned long __pack_fe01(unsigned int fpmode)
}
#ifdef CONFIG_PPC64
-#define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0)
-#define spin_begin() HMT_low()
+#define spin_begin() \
+ asm volatile(ASM_FTR_IFCLR( \
+ "or 1,1,1", /* HMT_LOW */ \
+ "nop", /* v3.1 uses pause_short in cpu_relax instead */ \
+ %0) :: "i" (CPU_FTR_ARCH_31) : "memory")
-#define spin_cpu_relax() barrier()
+#define spin_cpu_relax() \
+ asm volatile(ASM_FTR_IFCLR( \
+ "nop", /* Before v3.1 use priority nops in spin_begin/end */ \
+ PPC_WAIT(2, 0), /* aka pause_short */ \
+ %0) :: "i" (CPU_FTR_ARCH_31) : "memory")
-#define spin_cpu_yield() spin_cpu_relax()
+#define spin_end() \
+ asm volatile(ASM_FTR_IFCLR( \
+ "or 2,2,2", /* HMT_MEDIUM */ \
+ "nop", \
+ %0) :: "i" (CPU_FTR_ARCH_31) : "memory")
-#define spin_end() HMT_medium()
-
-#define spin_until_cond(cond) \
-do { \
- if (unlikely(!(cond))) { \
- spin_begin(); \
- do { \
- spin_cpu_relax(); \
- } while (!(cond)); \
- spin_end(); \
- } \
-} while (0)
-
-#else
-#define cpu_relax() barrier()
#endif
-/* Check that a certain kernel stack pointer is valid in task_struct p */
-int validate_sp(unsigned long sp, struct task_struct *p,
- unsigned long nbytes);
+/*
+ * Check that a certain kernel stack pointer is a valid (minimum sized)
+ * stack frame in task_struct p.
+ */
+int validate_sp(unsigned long sp, struct task_struct *p);
+
+/*
+ * validate the stack frame of a particular minimum size, used for when we are
+ * looking at a certain object in the stack beyond the minimum.
+ */
+int validate_sp_size(unsigned long sp, struct task_struct *p,
+ unsigned long nbytes);
/*
* Prefetch macros.
*/
#define ARCH_HAS_PREFETCH
#define ARCH_HAS_PREFETCHW
-#define ARCH_HAS_SPINLOCK_PREFETCH
static inline void prefetch(const void *x)
{
@@ -481,42 +416,27 @@ static inline void prefetchw(const void *x)
__asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));
}
-#define spin_lock_prefetch(x) prefetchw(x)
-
-#define HAVE_ARCH_PICK_MMAP_LAYOUT
-
-#ifdef CONFIG_PPC64
-static inline unsigned long get_clean_sp(unsigned long sp, int is_32)
-{
- if (is_32)
- return sp & 0x0ffffffffUL;
- return sp;
-}
-#else
-static inline unsigned long get_clean_sp(unsigned long sp, int is_32)
-{
- return sp;
-}
+/* asm stubs */
+extern unsigned long isa300_idle_stop_noloss(unsigned long psscr_val);
+extern unsigned long isa300_idle_stop_mayloss(unsigned long psscr_val);
+extern unsigned long isa206_idle_insn_mayloss(unsigned long type);
+#ifdef CONFIG_PPC_970_NAP
+extern void power4_idle_nap(void);
+void power4_idle_nap_return(void);
#endif
extern unsigned long cpuidle_disable;
enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF};
extern int powersave_nap; /* set if nap mode can be used in idle loop */
-extern unsigned long power7_idle_insn(unsigned long type); /* PNV_THREAD_NAP/etc*/
+
extern void power7_idle_type(unsigned long type);
-extern unsigned long power9_idle_stop(unsigned long psscr_val);
-extern unsigned long power9_offline_stop(unsigned long psscr_val);
-extern void power9_idle_type(unsigned long stop_psscr_val,
+extern void arch300_idle_type(unsigned long stop_psscr_val,
unsigned long stop_psscr_mask);
+void pnv_power9_force_smt4_catch(void);
+void pnv_power9_force_smt4_release(void);
-extern void flush_instruction_cache(void);
-extern void hard_reset_now(void);
-extern void poweroff_now(void);
extern int fix_alignment(struct pt_regs *);
-extern void cvt_fd(float *from, double *to);
-extern void cvt_df(double *from, float *to);
-extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val);
#ifdef CONFIG_PPC64
/*
@@ -529,6 +449,16 @@ extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val);
#define NET_IP_ALIGN 0
#endif
+int do_mathemu(struct pt_regs *regs);
+int do_spe_mathemu(struct pt_regs *regs);
+int speround_handler(struct pt_regs *regs);
+
+/* VMX copying */
+int enter_vmx_usercopy(void);
+int exit_vmx_usercopy(void);
+int enter_vmx_ops(void);
+void *exit_vmx_ops(void *dest);
+
#endif /* __KERNEL__ */
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
#endif /* _ASM_POWERPC_PROCESSOR_H */
generated by cgit (git 2.34.1) at 2025-12-22 09:49:13 +0000