Contributors: 23
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ian Munsie |
227 |
36.32% |
5 |
11.11% |
| Arnd Bergmann |
125 |
20.00% |
5 |
11.11% |
| Jeremy Kerr |
95 |
15.20% |
3 |
6.67% |
| Aneesh Kumar K.V |
31 |
4.96% |
6 |
13.33% |
| Nicholas Piggin |
21 |
3.36% |
2 |
4.44% |
| Michael Neuling |
20 |
3.20% |
2 |
4.44% |
| Benjamin Herrenschmidt |
18 |
2.88% |
3 |
6.67% |
| Peter Xu |
13 |
2.08% |
2 |
4.44% |
| Christoph Hellwig |
11 |
1.76% |
2 |
4.44% |
| Frederic Barrat |
9 |
1.44% |
1 |
2.22% |
| Linus Torvalds |
8 |
1.28% |
2 |
4.44% |
| Mel Gorman |
7 |
1.12% |
1 |
2.22% |
| Linus Torvalds (pre-git) |
7 |
1.12% |
1 |
2.22% |
| Mark Nutter |
6 |
0.96% |
1 |
2.22% |
| David S. Miller |
6 |
0.96% |
1 |
2.22% |
| Andrew Morton |
6 |
0.96% |
1 |
2.22% |
| Adam Litke |
6 |
0.96% |
1 |
2.22% |
| Thomas Gleixner |
2 |
0.32% |
1 |
2.22% |
| Michel Lespinasse |
2 |
0.32% |
1 |
2.22% |
| Anton Blanchard |
2 |
0.32% |
1 |
2.22% |
| Geoff Levand |
1 |
0.16% |
1 |
2.22% |
| Souptick Joarder |
1 |
0.16% |
1 |
2.22% |
| Paul Gortmaker |
1 |
0.16% |
1 |
2.22% |
| Total |
625 |
|
45 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* CoProcessor (SPU/AFU) mm fault handler
*
* (C) Copyright IBM Deutschland Entwicklung GmbH 2007
*
* Author: Arnd Bergmann <arndb@de.ibm.com>
* Author: Jeremy Kerr <jk@ozlabs.org>
*/
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/export.h>
#include <asm/reg.h>
#include <asm/copro.h>
#include <asm/spu.h>
#include <misc/cxl-base.h>
/*
* This ought to be kept in sync with the powerpc specific do_page_fault
* function. Currently, there are a few corner cases that we haven't had
* to handle fortunately.
*/
int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea,
unsigned long dsisr, vm_fault_t *flt)
{
struct vm_area_struct *vma;
unsigned long is_write;
int ret;
if (mm == NULL)
return -EFAULT;
if (mm->pgd == NULL)
return -EFAULT;
mmap_read_lock(mm);
ret = -EFAULT;
vma = find_vma(mm, ea);
if (!vma)
goto out_unlock;
if (ea < vma->vm_start) {
if (!(vma->vm_flags & VM_GROWSDOWN))
goto out_unlock;
if (expand_stack(vma, ea))
goto out_unlock;
}
is_write = dsisr & DSISR_ISSTORE;
if (is_write) {
if (!(vma->vm_flags & VM_WRITE))
goto out_unlock;
} else {
if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
goto out_unlock;
/*
* PROT_NONE is covered by the VMA check above.
* and hash should get a NOHPTE fault instead of
* a PROTFAULT in case fixup is needed for things
* like autonuma.
*/
if (!radix_enabled())
WARN_ON_ONCE(dsisr & DSISR_PROTFAULT);
}
ret = 0;
*flt = handle_mm_fault(vma, ea, is_write ? FAULT_FLAG_WRITE : 0, NULL);
/* The fault is fully completed (including releasing mmap lock) */
if (*flt & VM_FAULT_COMPLETED)
return 0;
if (unlikely(*flt & VM_FAULT_ERROR)) {
if (*flt & VM_FAULT_OOM) {
ret = -ENOMEM;
goto out_unlock;
} else if (*flt & (VM_FAULT_SIGBUS | VM_FAULT_SIGSEGV)) {
ret = -EFAULT;
goto out_unlock;
}
BUG();
}
out_unlock:
mmap_read_unlock(mm);
return ret;
}
EXPORT_SYMBOL_GPL(copro_handle_mm_fault);
#ifdef CONFIG_PPC_64S_HASH_MMU
int copro_calculate_slb(struct mm_struct *mm, u64 ea, struct copro_slb *slb)
{
u64 vsid, vsidkey;
int psize, ssize;
switch (get_region_id(ea)) {
case USER_REGION_ID:
pr_devel("%s: 0x%llx -- USER_REGION_ID\n", __func__, ea);
if (mm == NULL)
return 1;
psize = get_slice_psize(mm, ea);
ssize = user_segment_size(ea);
vsid = get_user_vsid(&mm->context, ea, ssize);
vsidkey = SLB_VSID_USER;
break;
case VMALLOC_REGION_ID:
pr_devel("%s: 0x%llx -- VMALLOC_REGION_ID\n", __func__, ea);
psize = mmu_vmalloc_psize;
ssize = mmu_kernel_ssize;
vsid = get_kernel_vsid(ea, mmu_kernel_ssize);
vsidkey = SLB_VSID_KERNEL;
break;
case IO_REGION_ID:
pr_devel("%s: 0x%llx -- IO_REGION_ID\n", __func__, ea);
psize = mmu_io_psize;
ssize = mmu_kernel_ssize;
vsid = get_kernel_vsid(ea, mmu_kernel_ssize);
vsidkey = SLB_VSID_KERNEL;
break;
case LINEAR_MAP_REGION_ID:
pr_devel("%s: 0x%llx -- LINEAR_MAP_REGION_ID\n", __func__, ea);
psize = mmu_linear_psize;
ssize = mmu_kernel_ssize;
vsid = get_kernel_vsid(ea, mmu_kernel_ssize);
vsidkey = SLB_VSID_KERNEL;
break;
default:
pr_debug("%s: invalid region access at %016llx\n", __func__, ea);
return 1;
}
/* Bad address */
if (!vsid)
return 1;
vsid = (vsid << slb_vsid_shift(ssize)) | vsidkey;
vsid |= mmu_psize_defs[psize].sllp |
((ssize == MMU_SEGSIZE_1T) ? SLB_VSID_B_1T : 0);
slb->esid = (ea & (ssize == MMU_SEGSIZE_1T ? ESID_MASK_1T : ESID_MASK)) | SLB_ESID_V;
slb->vsid = vsid;
return 0;
}
EXPORT_SYMBOL_GPL(copro_calculate_slb);
void copro_flush_all_slbs(struct mm_struct *mm)
{
#ifdef CONFIG_SPU_BASE
spu_flush_all_slbs(mm);
#endif
cxl_slbia(mm);
}
EXPORT_SYMBOL_GPL(copro_flush_all_slbs);
#endif