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X-CSE-ConnectionGUID: s07CalIlS42TOn72vQikGA== X-CSE-MsgGUID: 45tPKupRTpqPWpEV+GB10Q== X-IronPort-AV: E=McAfee;i="6800,10657,11618"; a="75966698" X-IronPort-AV: E=Sophos;i="6.19,316,1754982000"; d="scan'208";a="75966698" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Nov 2025 12:18:28 -0800 X-CSE-ConnectionGUID: St8difwuSveFXGfK8AK6qQ== X-CSE-MsgGUID: KB9gl2RZQMCDoE9XTgngJw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,316,1754982000"; d="scan'208";a="190946932" Received: from cmdeoliv-mobl4.amr.corp.intel.com (HELO [10.125.109.179]) ([10.125.109.179]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Nov 2025 12:18:27 -0800 Message-ID: <865c6cc0-f876-42cf-97cc-7b892192f3fc@intel.com> Date: Wed, 19 Nov 2025 13:18:26 -0700 Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH V4 09/17] nvdimm/label: Export routine to fetch region information To: Neeraj Kumar , linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, gost.dev@samsung.com Cc: a.manzanares@samsung.com, vishak.g@samsung.com, neeraj.kernel@gmail.com References: <20251119075255.2637388-1-s.neeraj@samsung.com> <20251119075255.2637388-10-s.neeraj@samsung.com> From: Dave Jiang Content-Language: en-US In-Reply-To: <20251119075255.2637388-10-s.neeraj@samsung.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 11/19/25 12:52 AM, Neeraj Kumar wrote: > CXL region information preserved from the LSA needs to be exported for > use by the CXL driver for CXL region re-creation. > > Signed-off-by: Neeraj Kumar Reviewed-by: Dave Jiang > --- > drivers/nvdimm/dimm_devs.c | 18 ++++++++++++++++++ > include/linux/libnvdimm.h | 2 ++ > 2 files changed, 20 insertions(+) > > diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c > index 3363a97cc5b5..1474b4e45fcc 100644 > --- a/drivers/nvdimm/dimm_devs.c > +++ b/drivers/nvdimm/dimm_devs.c > @@ -280,6 +280,24 @@ void *nvdimm_provider_data(struct nvdimm *nvdimm) > } > EXPORT_SYMBOL_GPL(nvdimm_provider_data); > > +bool nvdimm_has_cxl_region(struct nvdimm *nvdimm) > +{ > + if (!nvdimm) > + return false; > + > + return nvdimm->is_region_label; > +} > +EXPORT_SYMBOL_GPL(nvdimm_has_cxl_region); > + > +void *nvdimm_get_cxl_region_param(struct nvdimm *nvdimm) > +{ > + if (!nvdimm) > + return NULL; > + > + return &nvdimm->cxl_region_params; > +} > +EXPORT_SYMBOL_GPL(nvdimm_get_cxl_region_param); > + > static ssize_t commands_show(struct device *dev, > struct device_attribute *attr, char *buf) > { > diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h > index 07ea2e3f821a..3ffd50ab6ac4 100644 > --- a/include/linux/libnvdimm.h > +++ b/include/linux/libnvdimm.h > @@ -330,6 +330,8 @@ int nvdimm_in_overwrite(struct nvdimm *nvdimm); > bool is_nvdimm_sync(struct nd_region *nd_region); > int nd_region_label_update(struct nd_region *nd_region); > int nd_region_label_delete(struct nd_region *nd_region); > +bool nvdimm_has_cxl_region(struct nvdimm *nvdimm); > +void *nvdimm_get_cxl_region_param(struct nvdimm *nvdimm); > > static inline int nvdimm_ctl(struct nvdimm *nvdimm, unsigned int cmd, void *buf, > unsigned int buf_len, int *cmd_rc)