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Merge branch 'fixes' into next

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Merge our fixes branch from the 4.18 cycle to resolve some minor
conflicts.
This commit is contained in:
Michael Ellerman 2018-08-13 15:59:06 +10:00
commit b3124ec2f9
8 changed files with 73 additions and 26 deletions
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1
arch/powerpc/Makefile
View file

@ -237,6 +237,7 @@ endif
cpu-as-$(CONFIG_4xx) += -Wa,-m405
cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
cpu-as-$(CONFIG_E200) += -Wa,-me200
cpu-as-$(CONFIG_E500) += -Wa,-me500
cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4
cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)

37
arch/powerpc/include/asm/mmu_context.h
View file

@ -35,9 +35,9 @@ extern struct mm_iommu_table_group_mem_t *mm_iommu_lookup_rm(
extern struct mm_iommu_table_group_mem_t *mm_iommu_find(struct mm_struct *mm,
unsigned long ua, unsigned long entries);
extern long mm_iommu_ua_to_hpa(struct mm_iommu_table_group_mem_t *mem,
unsigned long ua, unsigned long *hpa);
unsigned long ua, unsigned int pageshift, unsigned long *hpa);
extern long mm_iommu_ua_to_hpa_rm(struct mm_iommu_table_group_mem_t *mem,
unsigned long ua, unsigned long *hpa);
unsigned long ua, unsigned int pageshift, unsigned long *hpa);
extern long mm_iommu_mapped_inc(struct mm_iommu_table_group_mem_t *mem);
extern void mm_iommu_mapped_dec(struct mm_iommu_table_group_mem_t *mem);
#endif
@ -143,24 +143,33 @@ static inline void mm_context_remove_copro(struct mm_struct *mm)
{
int c;
c = atomic_dec_if_positive(&mm->context.copros);
/* Detect imbalance between add and remove */
WARN_ON(c < 0);
/*
* Need to broadcast a global flush of the full mm before
* decrementing active_cpus count, as the next TLBI may be
* local and the nMMU and/or PSL need to be cleaned up.
* Should be rare enough so that it's acceptable.
* When removing the last copro, we need to broadcast a global
* flush of the full mm, as the next TLBI may be local and the
* nMMU and/or PSL need to be cleaned up.
*
* Both the 'copros' and 'active_cpus' counts are looked at in
* flush_all_mm() to determine the scope (local/global) of the
* TLBIs, so we need to flush first before decrementing
* 'copros'. If this API is used by several callers for the
* same context, it can lead to over-flushing. It's hopefully
* not common enough to be a problem.
*
* Skip on hash, as we don't know how to do the proper flush
* for the time being. Invalidations will remain global if
* used on hash.
* used on hash. Note that we can't drop 'copros' either, as
* it could make some invalidations local with no flush
* in-between.
*/
if (c == 0 && radix_enabled()) {
if (radix_enabled()) {
flush_all_mm(mm);
dec_mm_active_cpus(mm);
c = atomic_dec_if_positive(&mm->context.copros);
/* Detect imbalance between add and remove */
WARN_ON(c < 0);
if (c == 0)
dec_mm_active_cpus(mm);
}
}
#else

2
arch/powerpc/kernel/idle_book3s.S
View file

@ -146,7 +146,9 @@ power9_restore_additional_sprs:
mtspr SPRN_MMCR1, r4
ld r3, STOP_MMCR2(r13)
ld r4, PACA_SPRG_VDSO(r13)
mtspr SPRN_MMCR2, r3
mtspr SPRN_SPRG3, r4
blr
/*

2
arch/powerpc/kvm/book3s_64_vio.c
View file

@ -449,7 +449,7 @@ long kvmppc_tce_iommu_do_map(struct kvm *kvm, struct iommu_table *tbl,
/* This only handles v2 IOMMU type, v1 is handled via ioctl() */
return H_TOO_HARD;
if (WARN_ON_ONCE(mm_iommu_ua_to_hpa(mem, ua, &hpa)))
if (WARN_ON_ONCE(mm_iommu_ua_to_hpa(mem, ua, tbl->it_page_shift, &hpa)))
return H_HARDWARE;
if (mm_iommu_mapped_inc(mem))

6
arch/powerpc/kvm/book3s_64_vio_hv.c
View file

@ -275,7 +275,8 @@ static long kvmppc_rm_tce_iommu_do_map(struct kvm *kvm, struct iommu_table *tbl,
if (!mem)
return H_TOO_HARD;
if (WARN_ON_ONCE_RM(mm_iommu_ua_to_hpa_rm(mem, ua, &hpa)))
if (WARN_ON_ONCE_RM(mm_iommu_ua_to_hpa_rm(mem, ua, tbl->it_page_shift,
&hpa)))
return H_HARDWARE;
if (WARN_ON_ONCE_RM(mm_iommu_mapped_inc(mem)))
@ -461,7 +462,8 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
mem = mm_iommu_lookup_rm(vcpu->kvm->mm, ua, IOMMU_PAGE_SIZE_4K);
if (mem)
prereg = mm_iommu_ua_to_hpa_rm(mem, ua, &tces) == 0;
prereg = mm_iommu_ua_to_hpa_rm(mem, ua,
IOMMU_PAGE_SHIFT_4K, &tces) == 0;
}
if (!prereg) {

37
arch/powerpc/mm/mmu_context_iommu.c
View file

@ -19,6 +19,7 @@
#include <linux/hugetlb.h>
#include <linux/swap.h>
#include <asm/mmu_context.h>
#include <asm/pte-walk.h>
static DEFINE_MUTEX(mem_list_mutex);
@ -27,6 +28,7 @@ struct mm_iommu_table_group_mem_t {
struct rcu_head rcu;
unsigned long used;
atomic64_t mapped;
unsigned int pageshift;
u64 ua; /* userspace address */
u64 entries; /* number of entries in hpas[] */
u64 *hpas; /* vmalloc'ed */
@ -125,6 +127,8 @@ long mm_iommu_get(struct mm_struct *mm, unsigned long ua, unsigned long entries,
{
struct mm_iommu_table_group_mem_t *mem;
long i, j, ret = 0, locked_entries = 0;
unsigned int pageshift;
unsigned long flags;
struct page *page = NULL;
mutex_lock(&mem_list_mutex);
@ -159,6 +163,12 @@ long mm_iommu_get(struct mm_struct *mm, unsigned long ua, unsigned long entries,
goto unlock_exit;
}
/*
* For a starting point for a maximum page size calculation
* we use @ua and @entries natural alignment to allow IOMMU pages
* smaller than huge pages but still bigger than PAGE_SIZE.
*/
mem->pageshift = __ffs(ua | (entries << PAGE_SHIFT));
mem->hpas = vzalloc(array_size(entries, sizeof(mem->hpas[0])));
if (!mem->hpas) {
kfree(mem);
@ -199,6 +209,23 @@ long mm_iommu_get(struct mm_struct *mm, unsigned long ua, unsigned long entries,
}
}
populate:
pageshift = PAGE_SHIFT;
if (PageCompound(page)) {
pte_t *pte;
struct page *head = compound_head(page);
unsigned int compshift = compound_order(head);
local_irq_save(flags); /* disables as well */
pte = find_linux_pte(mm->pgd, ua, NULL, &pageshift);
local_irq_restore(flags);
/* Double check it is still the same pinned page */
if (pte && pte_page(*pte) == head &&
pageshift == compshift)
pageshift = max_t(unsigned int, pageshift,
PAGE_SHIFT);
}
mem->pageshift = min(mem->pageshift, pageshift);
mem->hpas[i] = page_to_pfn(page) << PAGE_SHIFT;
}
@ -349,7 +376,7 @@ struct mm_iommu_table_group_mem_t *mm_iommu_find(struct mm_struct *mm,
EXPORT_SYMBOL_GPL(mm_iommu_find);
long mm_iommu_ua_to_hpa(struct mm_iommu_table_group_mem_t *mem,
unsigned long ua, unsigned long *hpa)
unsigned long ua, unsigned int pageshift, unsigned long *hpa)
{
const long entry = (ua - mem->ua) >> PAGE_SHIFT;
u64 *va = &mem->hpas[entry];
@ -357,6 +384,9 @@ long mm_iommu_ua_to_hpa(struct mm_iommu_table_group_mem_t *mem,
if (entry >= mem->entries)
return -EFAULT;
if (pageshift > mem->pageshift)
return -EFAULT;
*hpa = *va | (ua & ~PAGE_MASK);
return 0;
@ -364,7 +394,7 @@ long mm_iommu_ua_to_hpa(struct mm_iommu_table_group_mem_t *mem,
EXPORT_SYMBOL_GPL(mm_iommu_ua_to_hpa);
long mm_iommu_ua_to_hpa_rm(struct mm_iommu_table_group_mem_t *mem,
unsigned long ua, unsigned long *hpa)
unsigned long ua, unsigned int pageshift, unsigned long *hpa)
{
const long entry = (ua - mem->ua) >> PAGE_SHIFT;
void *va = &mem->hpas[entry];
@ -373,6 +403,9 @@ long mm_iommu_ua_to_hpa_rm(struct mm_iommu_table_group_mem_t *mem,
if (entry >= mem->entries)
return -EFAULT;
if (pageshift > mem->pageshift)
return -EFAULT;
pa = (void *) vmalloc_to_phys(va);
if (!pa)
return -EFAULT;

4
arch/powerpc/xmon/xmon.c
View file

@ -2735,7 +2735,7 @@ generic_inst_dump(unsigned long adr, long count, int praddr,
{
int nr, dotted;
unsigned long first_adr;
unsigned long inst, last_inst = 0;
unsigned int inst, last_inst = 0;
unsigned char val[4];
dotted = 0;
@ -2759,7 +2759,7 @@ generic_inst_dump(unsigned long adr, long count, int praddr,
dotted = 0;
last_inst = inst;
if (praddr)
printf(REG" %.8lx", adr, inst);
printf(REG" %.8x", adr, inst);
printf("\t");
dump_func(inst, adr);
printf("\n");

10
drivers/vfio/vfio_iommu_spapr_tce.c
View file

@ -419,17 +419,17 @@ static void tce_iommu_unuse_page(struct tce_container *container,
}
static int tce_iommu_prereg_ua_to_hpa(struct tce_container *container,
unsigned long tce, unsigned long size,
unsigned long tce, unsigned long shift,
unsigned long *phpa, struct mm_iommu_table_group_mem_t **pmem)
{
long ret = 0;
struct mm_iommu_table_group_mem_t *mem;
mem = mm_iommu_lookup(container->mm, tce, size);
mem = mm_iommu_lookup(container->mm, tce, 1ULL << shift);
if (!mem)
return -EINVAL;
ret = mm_iommu_ua_to_hpa(mem, tce, phpa);
ret = mm_iommu_ua_to_hpa(mem, tce, shift, phpa);
if (ret)
return -EINVAL;
@ -450,7 +450,7 @@ static void tce_iommu_unuse_page_v2(struct tce_container *container,
return;
ret = tce_iommu_prereg_ua_to_hpa(container, be64_to_cpu(*pua),
IOMMU_PAGE_SIZE(tbl), &hpa, &mem);
tbl->it_page_shift, &hpa, &mem);
if (ret)
pr_debug("%s: tce %llx at #%lx was not cached, ret=%d\n",
__func__, be64_to_cpu(*pua), entry, ret);
@ -566,7 +566,7 @@ static long tce_iommu_build_v2(struct tce_container *container,
__be64 *pua = IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry + i);
ret = tce_iommu_prereg_ua_to_hpa(container,
tce, IOMMU_PAGE_SIZE(tbl), &hpa, &mem);
tce, tbl->it_page_shift, &hpa, &mem);
if (ret)
break;