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Mon, 14 Jun 2021 18:33:48 -0700 (PDT) Received: from localhost.localdomain ([2804:431:c7c6:4d9a:784f:a7de:c020:5f1e]) by smtp.gmail.com with ESMTPSA id h2sm11639320qkf.106.2021.06.14.18.33.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Jun 2021 18:33:48 -0700 (PDT) From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Subject: [RFC PATCH 6/8] nvdimm: add PPC64 'device-node' property Date: Mon, 14 Jun 2021 22:33:07 -0300 Message-Id: <20210615013309.2833323-7-danielhb413@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210615013309.2833323-1-danielhb413@gmail.com> References: <20210615013309.2833323-1-danielhb413@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::831; envelope-from=danielhb413@gmail.com; helo=mail-qt1-x831.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Shivaprasad G Bhat , aneesh.kumar@linux.ibm.com, Daniel Henrique Barboza , groug@kaod.org, qemu-ppc@nongnu.org, Igor Mammedov , david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The spapr-nvdimm driver is able to operate in two ways. The first one is as a regular memory in which the NUMA node of the parent pc-dimm class is used. The second mode, as persistent memory, allows for a different NUMA node to be used based on the locality of the device. At this moment we don't have a way to express this second NUMA node for the persistent memory mode. This patch introduces a new 'device-node' property that will be used by the PPC64 spapr-nvdimm driver to set a second NUMA node for the nvdimm. CC: Shivaprasad G Bhat CC: Igor Mammedov Signed-off-by: Daniel Henrique Barboza --- hw/mem/nvdimm.c | 28 ++++++++++++++++++++++++++++ include/hw/mem/nvdimm.h | 12 ++++++++++++ 2 files changed, 40 insertions(+) diff --git a/hw/mem/nvdimm.c b/hw/mem/nvdimm.c index 7397b67156..030ccf7575 100644 --- a/hw/mem/nvdimm.c +++ b/hw/mem/nvdimm.c @@ -96,6 +96,29 @@ static void nvdimm_set_uuid(Object *obj, Visitor *v, const char *name, g_free(value); } +static void nvdimm_get_device_node(Object *obj, Visitor *v, + const char *name, void *opaque, + Error **errp) +{ + NVDIMMDevice *nvdimm = NVDIMM(obj); + uint8_t value = nvdimm->device_node; + + visit_type_uint8(v, name, &value, errp); +} + +static void nvdimm_set_device_node(Object *obj, Visitor *v, + const char *name, void *opaque, + Error **errp) +{ + NVDIMMDevice *nvdimm = NVDIMM(obj); + uint8_t value; + + if (!visit_type_uint8(v, name, &value, errp)) { + return; + } + + nvdimm->device_node = value; +} static void nvdimm_init(Object *obj) { @@ -105,6 +128,11 @@ static void nvdimm_init(Object *obj) object_property_add(obj, NVDIMM_UUID_PROP, "QemuUUID", nvdimm_get_uuid, nvdimm_set_uuid, NULL, NULL); + + object_property_add(obj, NVDIMM_DEVICE_NODE, "uint8", + nvdimm_get_device_node, + nvdimm_set_device_node, + NULL, NULL); } static void nvdimm_finalize(Object *obj) diff --git a/include/hw/mem/nvdimm.h b/include/hw/mem/nvdimm.h index bcf62f825c..430169322f 100644 --- a/include/hw/mem/nvdimm.h +++ b/include/hw/mem/nvdimm.h @@ -49,6 +49,7 @@ OBJECT_DECLARE_TYPE(NVDIMMDevice, NVDIMMClass, NVDIMM) #define NVDIMM_LABEL_SIZE_PROP "label-size" +#define NVDIMM_DEVICE_NODE "device-node" #define NVDIMM_UUID_PROP "uuid" #define NVDIMM_UNARMED_PROP "unarmed" @@ -89,6 +90,17 @@ struct NVDIMMDevice { * The PPC64 - spapr requires each nvdimm device have a uuid. */ QemuUUID uuid; + + /* + * The spapr-nvdimm (PPC64 NVDIMM) driver supports two modes of + * operation: regular memory and persistent memory. When using the + * device as regular memory, the NUMA nodeid that comes from + * PC_DIMM_NODEPROP is to be used. When used as persistent memory, + * the guest should consider the 'device-node' instead since it + * indicates the locality of the device to an established NUMA + * node, which is more relevant to this type of usage. + */ + uint8_t device_node; }; struct NVDIMMClass { -- 2.31.1