search for: hmm_pfns_clear

...------------------------- 1 file changed, 57 insertions(+), 73 deletions(-) diff --git a/mm/hmm.c b/mm/hmm.c index 1bc014cddd78..838cd1d50497 100644 --- a/mm/hmm.c +++ b/mm/hmm.c @@ -840,13 +840,44 @@ static int hmm_vma_walk_hugetlb_entry(pte_t *pte, unsigned long hmask, #endif } -static void hmm_pfns_clear(struct hmm_range *range, - uint64_t *pfns, - unsigned long addr, - unsigned long end) +static int hmm_vma_walk_test(unsigned long start, + unsigned long end, + struct mm_walk *walk) { - for (; addr < end; addr += PAGE_SIZE, pfns++) - *pfns = range->values[HMM_PF...

...d, range, HMM_PFN_ERROR); ptep = pte_offset_map(pmdp, addr); i = (addr - range->start) >> PAGE_SHIFT; @@ -770,13 +769,36 @@ static int hmm_vma_walk_hugetlb_entry(pte_t *pte, unsigned long hmask, #define hmm_vma_walk_hugetlb_entry NULL #endif /* CONFIG_HUGETLB_PAGE */ -static void hmm_pfns_clear(struct hmm_range *range, - uint64_t *pfns, - unsigned long addr, - unsigned long end) +static int hmm_vma_walk_test(unsigned long start, + unsigned long end, + struct mm_walk *walk) { - for (; addr < end; addr += PAGE_SIZE, pfns++) - *pfns = range->values[HMM_PF...

Here are seven more patches for things I found to clean up. This was based on top of Christoph's seven patches: "hmm_range_fault related fixes and legacy API removal v3". I assume this will go into Jason's tree since there will likely be more HMM changes in this cycle. Changes from v1 to v2: Added AMD GPU to hmm_update removal. Added 2 patches from Christoph. Added 2 patches as

...m_vma_walk_hugetlb_entry(pte_t *pte, unsigned long hmask, return hmm_vma_walk_hole_(addr, end, fault, write_fault, walk); return ret; -#else /* CONFIG_HUGETLB_PAGE */ - return -EINVAL; -#endif } +#else +#define hmm_vma_walk_hugetlb_entry NULL +#endif /* CONFIG_HUGETLB_PAGE */ static void hmm_pfns_clear(struct hmm_range *range, uint64_t *pfns, -- 2.20.1

...unsigned page_shift); +int hmm_range_register(struct hmm_range *range, struct hmm_mirror *mirror); void hmm_range_unregister(struct hmm_range *range); /* diff --git a/mm/hmm.c b/mm/hmm.c index 3a3852660757..926735a3aef9 100644 --- a/mm/hmm.c +++ b/mm/hmm.c @@ -843,35 +843,25 @@ static void hmm_pfns_clear(struct hmm_range *range, * hmm_range_register() - start tracking change to CPU page table over a range * @range: range * @mm: the mm struct for the range of virtual address - * @start: start virtual address (inclusive) - * @end: end virtual address (exclusive) - * @page_shift: expect page shi...

Hi Jérôme, Ben, Felxi and Jason, below is a series against the hmm tree which cleans up various minor bits and allows HMM_MIRROR to be built on all architectures. Diffstat: 7 files changed, 81 insertions(+), 171 deletions(-) A git tree is also available at: git://git.infradead.org/users/hch/misc.git hmm-cleanups Gitweb:

...dr += size, i++, pfn += pfn_inc) + pfn = pte_pfn(entry) + ((start & mask) >> PAGE_SHIFT); + for (; addr < end; addr += PAGE_SIZE, i++, pfn++) range->pfns[i] = hmm_device_entry_from_pfn(range, pfn) | cpu_flags; hmm_vma_walk->last = end; @@ -850,14 +837,13 @@ static void hmm_pfns_clear(struct hmm_range *range, */ int hmm_range_register(struct hmm_range *range, struct hmm_mirror *mirror) { - unsigned long mask = ((1UL << range->page_shift) - 1UL); struct hmm *hmm = mirror->hmm; unsigned long flags; range->valid = false; range->hmm = NULL; - if ((r...

...signed long hmask, size = PAGE_SIZE; } - - ptl = huge_pte_lock(hstate_vma(walk->vma), walk->mm, pte); + ptl = huge_pte_lock(hstate_vma(vma), walk->mm, pte); entry = huge_ptep_get(pte); i = (start - range->start) >> range->page_shift; @@ -859,7 +854,7 @@ static void hmm_pfns_clear(struct hmm_range *range, * @start: start virtual address (inclusive) * @end: end virtual address (exclusive) * @page_shift: expect page shift for the range - * Returns 0 on success, -EFAULT if the address space is no longer valid + * Return: 0 on success, -EFAULT if the address space is no lo...

...dr += size, i++, pfn += pfn_inc) + pfn = pte_pfn(entry) + ((start & mask) >> PAGE_SHIFT); + for (; addr < end; addr += PAGE_SIZE, i++, pfn++) range->pfns[i] = hmm_device_entry_from_pfn(range, pfn) | cpu_flags; hmm_vma_walk->last = end; @@ -850,14 +837,13 @@ static void hmm_pfns_clear(struct hmm_range *range, */ int hmm_range_register(struct hmm_range *range, struct hmm_mirror *mirror) { - unsigned long mask = ((1UL << range->page_shift) - 1UL); struct hmm *hmm = mirror->hmm; unsigned long flags; range->valid = false; range->hmm = NULL; - if ((r...

Hi Jérôme, Ben, Felix and Jason, below is a series against the hmm tree which cleans up various minor bits and allows HMM_MIRROR to be built on all architectures. Diffstat: 11 files changed, 94 insertions(+), 210 deletions(-) A git tree is also available at: git://git.infradead.org/users/hch/misc.git hmm-cleanups.2 Gitweb:

...mp;hmm->mirrors_sem); - list_del(&mirror->list); - up_write(&hmm->mirrors_sem); - mmu_notifier_put(&hmm->mmu_notifier); -} -EXPORT_SYMBOL(hmm_mirror_unregister); - struct hmm_vma_walk { struct hmm_range *range; struct dev_pagemap *pgmap; @@ -785,87 +598,6 @@ static void hmm_pfns_clear(struct hmm_range *range, *pfns = range->values[HMM_PFN_NONE]; } -/* - * hmm_range_register() - start tracking change to CPU page table over a range - * @range: range - * @mm: the mm struct for the range of virtual address - * - * Return: 0 on success, -EFAULT if the address space is no lon...

These changes are based on Jason's latest hmm branch. Patch 1 was previously posted here [1] but was dropped from the orginal series. Hopefully, the tests will reduce concerns about edge conditions. I'm sure more tests could be usefully added but I thought this was a good starting point. [1] https://lore.kernel.org/linux-mm/20190726005650.2566-6-rcampbell at nvidia.com/ Ralph Campbell

Hi Dan, Jérôme and Jason, below is a series that cleans up the dev_pagemap interface so that it is more easily usable, which removes the need to wrap it in hmm and thus allowing to kill a lot of code Note: this series is on top of Linux 5.2-rc6 and has some minor conflicts with the hmm tree that are easy to resolve. Diffstat summary: 34 files changed, 379 insertions(+), 1016 deletions(-) Git

From: Jason Gunthorpe <jgg at mellanox.com> 8 of the mmu_notifier using drivers (i915_gem, radeon_mn, umem_odp, hfi1, scif_dma, vhost, gntdev, hmm) drivers are using a common pattern where they only use invalidate_range_start/end and immediately check the invalidating range against some driver data structure to tell if the driver is interested. Half of them use an interval_tree, the others

From: Jason Gunthorpe <jgg at mellanox.com> 8 of the mmu_notifier using drivers (i915_gem, radeon_mn, umem_odp, hfi1, scif_dma, vhost, gntdev, hmm) drivers are using a common pattern where they only use invalidate_range_start/end and immediately check the invalidating range against some driver data structure to tell if the driver is interested. Half of them use an interval_tree, the others