diff options
Diffstat (limited to 'drivers/nvdimm/pmem.c')
| -rw-r--r-- | drivers/nvdimm/pmem.c | 49 |
1 files changed, 39 insertions, 10 deletions
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 68940356cad3..6071e2942053 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -20,6 +20,7 @@ #include <linux/hdreg.h> #include <linux/init.h> #include <linux/platform_device.h> +#include <linux/set_memory.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/badblocks.h> @@ -51,6 +52,30 @@ static struct nd_region *to_region(struct pmem_device *pmem) return to_nd_region(to_dev(pmem)->parent); } +static void hwpoison_clear(struct pmem_device *pmem, + phys_addr_t phys, unsigned int len) +{ + unsigned long pfn_start, pfn_end, pfn; + + /* only pmem in the linear map supports HWPoison */ + if (is_vmalloc_addr(pmem->virt_addr)) + return; + + pfn_start = PHYS_PFN(phys); + pfn_end = pfn_start + PHYS_PFN(len); + for (pfn = pfn_start; pfn < pfn_end; pfn++) { + struct page *page = pfn_to_page(pfn); + + /* + * Note, no need to hold a get_dev_pagemap() reference + * here since we're in the driver I/O path and + * outstanding I/O requests pin the dev_pagemap. + */ + if (test_and_clear_pmem_poison(page)) + clear_mce_nospec(pfn); + } +} + static blk_status_t pmem_clear_poison(struct pmem_device *pmem, phys_addr_t offset, unsigned int len) { @@ -65,6 +90,7 @@ static blk_status_t pmem_clear_poison(struct pmem_device *pmem, if (cleared < len) rc = BLK_STS_IOERR; if (cleared > 0 && cleared / 512) { + hwpoison_clear(pmem, pmem->phys_addr + offset, cleared); cleared /= 512; dev_dbg(dev, "%#llx clear %ld sector%s\n", (unsigned long long) sector, cleared, @@ -120,7 +146,7 @@ static blk_status_t read_pmem(struct page *page, unsigned int off, } static blk_status_t pmem_do_bvec(struct pmem_device *pmem, struct page *page, - unsigned int len, unsigned int off, bool is_write, + unsigned int len, unsigned int off, unsigned int op, sector_t sector) { blk_status_t rc = BLK_STS_OK; @@ -131,7 +157,7 @@ static blk_status_t pmem_do_bvec(struct pmem_device *pmem, struct page *page, if (unlikely(is_bad_pmem(&pmem->bb, sector, len))) bad_pmem = true; - if (!is_write) { + if (!op_is_write(op)) { if (unlikely(bad_pmem)) rc = BLK_STS_IOERR; else { @@ -180,8 +206,7 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio) do_acct = nd_iostat_start(bio, &start); bio_for_each_segment(bvec, bio, iter) { rc = pmem_do_bvec(pmem, bvec.bv_page, bvec.bv_len, - bvec.bv_offset, op_is_write(bio_op(bio)), - iter.bi_sector); + bvec.bv_offset, bio_op(bio), iter.bi_sector); if (rc) { bio->bi_status = rc; break; @@ -198,13 +223,13 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio) } static int pmem_rw_page(struct block_device *bdev, sector_t sector, - struct page *page, bool is_write) + struct page *page, unsigned int op) { struct pmem_device *pmem = bdev->bd_queue->queuedata; blk_status_t rc; rc = pmem_do_bvec(pmem, page, hpage_nr_pages(page) * PAGE_SIZE, - 0, is_write, sector); + 0, op, sector); /* * The ->rw_page interface is subtle and tricky. The core @@ -213,7 +238,7 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, * caused by double completion. */ if (rc == 0) - page_endio(page, is_write, 0); + page_endio(page, op_is_write(op), 0); return blk_status_to_errno(rc); } @@ -227,8 +252,11 @@ __weak long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, if (unlikely(is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512, PFN_PHYS(nr_pages)))) return -EIO; - *kaddr = pmem->virt_addr + offset; - *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); + + if (kaddr) + *kaddr = pmem->virt_addr + offset; + if (pfn) + *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); /* * If badblocks are present, limit known good range to the @@ -414,7 +442,8 @@ static int pmem_attach_disk(struct device *dev, blk_queue_logical_block_size(q, pmem_sector_size(ndns)); blk_queue_max_hw_sectors(q, UINT_MAX); blk_queue_flag_set(QUEUE_FLAG_NONROT, q); - blk_queue_flag_set(QUEUE_FLAG_DAX, q); + if (pmem->pfn_flags & PFN_MAP) + blk_queue_flag_set(QUEUE_FLAG_DAX, q); q->queuedata = pmem; disk = alloc_disk_node(0, nid); |