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Date: Wed, 8 Jan 2020 12:22:16 +0530 Message-Id: <20200108065219.171221-3-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200108065219.171221-1-aneesh.kumar@linux.ibm.com> References: <20200108065219.171221-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-08_01:2020-01-07,2020-01-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 clxscore=1015 bulkscore=0 adultscore=0 lowpriorityscore=0 mlxlogscore=902 impostorscore=0 spamscore=0 phishscore=0 priorityscore=1501 suspectscore=1 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001080058 Message-ID-Hash: IABFT3H6PVOFBXKXHUJQMFTAYMT34G7I X-Message-ID-Hash: IABFT3H6PVOFBXKXHUJQMFTAYMT34G7I X-MailFrom: aneesh.kumar@linux.ibm.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: linux-nvdimm@lists.01.org, "Aneesh Kumar K.V" X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Architectures like ppc64 use different page size than PAGE_SIZE to map direct-map address range. The kernel needs to make sure the namespace size is aligned correctly for the direct-map page size. kernel log will contain the below details [ 939.620064] nd namespace0.3: 1071644672 is not 16384K aligned Signed-off-by: Aneesh Kumar K.V --- drivers/nvdimm/namespace_devs.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 0751fd4b7d4a..8567d8969014 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -891,6 +891,17 @@ static int grow_dpa_allocation(struct nd_region *nd_region, return 0; } +static unsigned long nvdimm_validate_namespace_size(struct nd_region *nd_region, + unsigned long size, unsigned long align_size) +{ + u32 remainder; + + div_u64_rem(size, align_size * nd_region->ndr_mappings, &remainder); + if (remainder) + return align_size * nd_region->ndr_mappings; + return 0; +} + static void nd_namespace_pmem_set_resource(struct nd_region *nd_region, struct nd_namespace_pmem *nspm, resource_size_t size) { @@ -949,7 +960,8 @@ static ssize_t __size_store(struct device *dev, unsigned long long val) struct nd_mapping *nd_mapping; struct nvdimm_drvdata *ndd; struct nd_label_id label_id; - u32 flags = 0, remainder; + unsigned long map_size; + u32 flags = 0; int rc, i, id = -1; u8 *uuid = NULL; @@ -980,10 +992,9 @@ static ssize_t __size_store(struct device *dev, unsigned long long val) return -ENXIO; } - div_u64_rem(val, PAGE_SIZE * nd_region->ndr_mappings, &remainder); - if (remainder) { - dev_dbg(dev, "%llu is not %ldK aligned\n", val, - (PAGE_SIZE * nd_region->ndr_mappings) / SZ_1K); + map_size = nvdimm_validate_namespace_size(nd_region, val, arch_namespace_align_size()); + if (map_size) { + dev_err(dev, "%llu is not %ldK aligned\n", val, map_size / SZ_1K); return -EINVAL; } -- 2.24.1 _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org