In file included from arch/sparc/include/asm/mmu_context.h:5:0,
from include/linux/mmu_context.h:5,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h:29,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c:23:
arch/sparc/include/asm/mmu_context_64.h: In function
'arch_start_context_switch':
arch/sparc/include/asm/mmu_context_64.h:157:4: error: implicit declaration of
function 'set_tsk_thread_flag'; did you mean 'set_ti_thread_flag'?
[-Werror=implicit-function-declaration]
set_tsk_thread_flag(prev, TIF_MCDPER);
^~~~~~~~~~~~~~~~~~~
set_ti_thread_flag
arch/sparc/include/asm/mmu_context_64.h:159:4: error: implicit declaration of
function 'clear_tsk_thread_flag'; did you mean 'clear_ti_thread_flag'?
[-Werror=implicit-function-declaration]
clear_tsk_thread_flag(prev, TIF_MCDPER);
^~~~~~~~~~~~~~~~~~~~~
clear_ti_thread_flag
arch/sparc/include/asm/mmu_context_64.h: In function
'finish_arch_post_lock_switch':
arch/sparc/include/asm/mmu_context_64.h:180:25: error: dereferencing pointer to
incomplete type 'struct task_struct'
if (current && current->mm && current->mm->context.adi) {
^~
In file included from arch/sparc/include/asm/processor.h:5:0,
from arch/sparc/include/asm/spinlock_64.h:12,
from arch/sparc/include/asm/spinlock.h:5,
from include/linux/spinlock.h:88,
from arch/sparc/include/asm/mmu_context_64.h:9,
from arch/sparc/include/asm/mmu_context.h:5,
from include/linux/mmu_context.h:5,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h:29,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c:23:
arch/sparc/include/asm/processor_64.h:194:28: error: implicit declaration of
function 'task_thread_info'; did you mean 'test_thread_flag'?
[-Werror=implicit-function-declaration]
#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
^
arch/sparc/include/asm/mmu_context_64.h:183:11: note: in expansion of macro
'task_pt_regs'
regs = task_pt_regs(current);
^~~~~~~~~~~~
arch/sparc/include/asm/processor_64.h:194:49: error: invalid type argument of
'->' (have 'int')
#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
^
arch/sparc/include/asm/mmu_context_64.h:183:11: note: in expansion of macro
'task_pt_regs'
regs = task_pt_regs(current);
^~~~~~~~~~~~
In file included from include/linux/cred.h:21:0,
from include/linux/seq_file.h:12,
from include/linux/pinctrl/consumer.h:17,
from include/linux/pinctrl/devinfo.h:21,
from include/linux/device.h:23,
from include/linux/cdev.h:8,
from include/drm/drmP.h:36,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c:25:
include/linux/sched.h: At top level:
include/linux/sched.h:1530:20: warning: conflicting types for
'set_tsk_thread_flag'
static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag)
^~~~~~~~~~~~~~~~~~~
include/linux/sched.h:1530:20: error: static declaration of
'set_tsk_thread_flag' follows non-static declaration
In file included from arch/sparc/include/asm/mmu_context.h:5:0,
from include/linux/mmu_context.h:5,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h:29,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c:23:
arch/sparc/include/asm/mmu_context_64.h:157:4: note: previous implicit
declaration of 'set_tsk_thread_flag' was here
set_tsk_thread_flag(prev, TIF_MCDPER);
^~~~~~~~~~~~~~~~~~~
In file included from include/linux/cred.h:21:0,
from include/linux/seq_file.h:12,
from include/linux/pinctrl/consumer.h:17,
from include/linux/pinctrl/devinfo.h:21,
from include/linux/device.h:23,
from include/linux/cdev.h:8,
from include/drm/drmP.h:36,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c:25:
include/linux/sched.h:1535:20: warning: conflicting types for
'clear_tsk_thread_flag'
static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)
^~~~~~~~~~~~~~~~~~~~~
include/linux/sched.h:1535:20: error: static declaration of
'clear_tsk_thread_flag' follows non-static declaration
In file included from arch/sparc/include/asm/mmu_context.h:5:0,
from include/linux/mmu_context.h:5,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h:29,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c:23:
arch/sparc/include/asm/mmu_context_64.h:159:4: note: previous implicit
declaration of 'clear_tsk_thread_flag' was here
clear_tsk_thread_flag(prev, TIF_MCDPER);
^~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +157 arch/sparc/include/asm/mmu_context_64.h
8
> 9 #include <linux/spinlock.h>
10 #include <linux/mm_types.h>
11 #include <linux/smp.h>
12
13 #include <asm/spitfire.h>
14 #include <asm/adi_64.h>
15 #include <asm-generic/mm_hooks.h>
16 #include <asm/percpu.h>
17
18 static inline void enter_lazy_tlb(struct mm_struct *mm, struct
task_struct *tsk)
19 {
20 }
21
22 extern spinlock_t ctx_alloc_lock;
23 extern unsigned long tlb_context_cache;
24 extern unsigned long mmu_context_bmap[];
25
26 DECLARE_PER_CPU(struct mm_struct *, per_cpu_secondary_mm);
27 void get_new_mmu_context(struct mm_struct *mm);
28 int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
29 void destroy_context(struct mm_struct *mm);
30
31 void __tsb_context_switch(unsigned long pgd_pa,
32 struct tsb_config *tsb_base,
33 struct tsb_config *tsb_huge,
34 unsigned long tsb_descr_pa,
35 unsigned long secondary_ctx);
36
37 static inline void tsb_context_switch_ctx(struct mm_struct *mm,
38 unsigned long ctx)
39 {
40 __tsb_context_switch(__pa(mm->pgd),
41 &mm->context.tsb_block[MM_TSB_BASE],
42 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
43 (mm->context.tsb_block[MM_TSB_HUGE].tsb ?
44 &mm->context.tsb_block[MM_TSB_HUGE] :
45 NULL)
46 #else
47 NULL
48 #endif
49 ,
__pa(&mm->context.tsb_descr[MM_TSB_BASE]),
50 ctx);
51 }
52
53 #define tsb_context_switch(X) tsb_context_switch_ctx(X, 0)
54
55 void tsb_grow(struct mm_struct *mm,
56 unsigned long tsb_index,
57 unsigned long mm_rss);
58 #ifdef CONFIG_SMP
59 void smp_tsb_sync(struct mm_struct *mm);
60 #else
61 #define smp_tsb_sync(__mm) do { } while (0)
62 #endif
63
64 /* Set MMU context in the actual hardware. */
65 #define load_secondary_context(__mm) \
66 __asm__ __volatile__( \
67 "\n661: stxa %0, [%1] %2\n" \
68 " .section .sun4v_1insn_patch, \"ax\"\n" \
69 " .word 661b\n" \
70 " stxa %0, [%1] %3\n" \
71 " .previous\n" \
72 " flush %%g6\n" \
73 : /* No outputs */ \
74 : "r" (CTX_HWBITS((__mm)->context)), \
75 "r" (SECONDARY_CONTEXT), "i" (ASI_DMMU), "i" (ASI_MMU))
76
77 void __flush_tlb_mm(unsigned long, unsigned long);
78
79 /* Switch the current MM context. */
80 static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct
*mm, struct task_struct *tsk)
81 {
82 unsigned long ctx_valid, flags;
83 int cpu = smp_processor_id();
84
85 per_cpu(per_cpu_secondary_mm, cpu) = mm;
86 if (unlikely(mm == &init_mm))
87 return;
88
89 spin_lock_irqsave(&mm->context.lock, flags);
90 ctx_valid = CTX_VALID(mm->context);
91 if (!ctx_valid)
92 get_new_mmu_context(mm);
93
94 /* We have to be extremely careful here or else we will miss
95 * a TSB grow if we switch back and forth between a kernel
96 * thread and an address space which has it's TSB size increased
97 * on another processor.
98 *
99 * It is possible to play some games in order to optimize the
100 * switch, but the safest thing to do is to unconditionally
101 * perform the secondary context load and the TSB context
switch.
102 *
103 * For reference the bad case is, for address space "A":
104 *
105 * CPU 0 CPU 1
106 * run address space A
107 * set cpu0's bits in cpu_vm_mask
108 * switch to kernel thread, borrow
109 * address space A via entry_lazy_tlb
110 * run address space A
111 * set cpu1's bit in
cpu_vm_mask
112 * flush_tlb_pending()
113 * reset cpu_vm_mask to
just cpu1
114 * TSB grow
115 * run address space A
116 * context was valid, so skip
117 * TSB context switch
118 *
119 * At that point cpu0 continues to use a stale TSB, the one from
120 * before the TSB grow performed on cpu1. cpu1 did not
cross-call
121 * cpu0 to update it's TSB because at that point the cpu_vm_mask
122 * only had cpu1 set in it.
123 */
124 tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context));
125
126 /* Any time a processor runs a context on an address space
127 * for the first time, we must flush that context out of the
128 * local TLB.
129 */
130 if (!ctx_valid || !cpumask_test_cpu(cpu, mm_cpumask(mm))) {
131 cpumask_set_cpu(cpu, mm_cpumask(mm));
132 __flush_tlb_mm(CTX_HWBITS(mm->context),
133 SECONDARY_CONTEXT);
134 }
135 spin_unlock_irqrestore(&mm->context.lock, flags);
136 }
137
138 #define deactivate_mm(tsk,mm) do { } while (0)
139 #define activate_mm(active_mm, mm) switch_mm(active_mm, mm, NULL)
140
141 #define __HAVE_ARCH_START_CONTEXT_SWITCH
142 static inline void arch_start_context_switch(struct task_struct *prev)
143 {
144 /* Save the current state of MCDPER register for the process
145 * we are switching from
146 */
147 if (adi_capable()) {
148 register unsigned long tmp_mcdper;
149
150 __asm__ __volatile__(
151 ".word 0x83438000\n\t" /* rd %mcdper,
%g1 */
152 "mov %%g1, %0\n\t"
153 : "=r" (tmp_mcdper)
154 :
155 : "g1");
156 if (tmp_mcdper)
> 157 set_tsk_thread_flag(prev, TIF_MCDPER);
158 else
> 159 clear_tsk_thread_flag(prev, TIF_MCDPER);
160 }
161 }
162
163 #define finish_arch_post_lock_switch finish_arch_post_lock_switch
164 static inline void finish_arch_post_lock_switch(void)
165 {
166 /* Restore the state of MCDPER register for the new process
167 * just switched to.
168 */
169 if (adi_capable()) {
170 register unsigned long tmp_mcdper;
171
172 tmp_mcdper = test_thread_flag(TIF_MCDPER);
173 __asm__ __volatile__(
174 "mov %0, %%g1\n\t"
175 ".word 0x9d800001\n\t" /* wr %g0, %g1,
%mcdper" */
176 ".word 0xaf902001\n\t" /* wrpr %g0, 1,
%pmcdper */
177 :
178 : "ir" (tmp_mcdper)
179 : "g1");
> 180 if (current && current->mm &&
current->mm->context.adi) {
181 struct pt_regs *regs;
182
> 183 regs = task_pt_regs(current);
184 regs->tstate |= TSTATE_MCDE;
185 }
186 }
187 }
188
---
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