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Fri, 18 Dec 2020 08:29:11 -0500 (EST) From: Klaus Jensen To: qemu-devel@nongnu.org Subject: [PATCH 3/8] hw/block/nvme: allow cmb and pmr to coexist Date: Fri, 18 Dec 2020 14:29:00 +0100 Message-Id: <20201218132905.967326-4-its@irrelevant.dk> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201218132905.967326-1-its@irrelevant.dk> References: <20201218132905.967326-1-its@irrelevant.dk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=64.147.123.21; envelope-from=its@irrelevant.dk; helo=wout5-smtp.messagingengine.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, SPF_HELO_PASS=-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: Fam Zheng , Kevin Wolf , qemu-block@nongnu.org, Klaus Jensen , Max Reitz , Keith Busch , Andrzej Jakowski , Stefan Hajnoczi , Klaus Jensen Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Klaus Jensen With BAR 4 now free to use, allow PMR and CMB to be enabled simultaneously. Signed-off-by: Klaus Jensen --- hw/block/nvme.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index 8a7f682cb3ab..69f2fe4bd4ff 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -28,14 +28,13 @@ * Note cmb_size_mb denotes size of CMB in MB. CMB is assumed to be at * offset 0 in BAR2 and supports only WDS, RDS and SQS for now. * - * cmb_size_mb= and pmrdev= options are mutually exclusive due to limitation - * in available BAR's. cmb_size_mb= will take precedence over pmrdev= when - * both provided. * Enabling pmr emulation can be achieved by pointing to memory-backend-file. * For example: * -object memory-backend-file,id=,share=on,mem-path=, \ * size= .... -device nvme,...,pmrdev= * + * The PMR will use BAR 4/5 exclusively. + * * * nvme device parameters * ~~~~~~~~~~~~~~~~~~~~~~ @@ -76,7 +75,7 @@ #define NVME_DB_SIZE 4 #define NVME_SPEC_VER 0x00010300 #define NVME_CMB_BIR 2 -#define NVME_PMR_BIR 2 +#define NVME_PMR_BIR 4 #define NVME_TEMPERATURE 0x143 #define NVME_TEMPERATURE_WARNING 0x157 #define NVME_TEMPERATURE_CRITICAL 0x175 @@ -2812,7 +2811,7 @@ static void nvme_check_constraints(NvmeCtrl *n, Error **errp) return; } - if (!n->params.cmb_size_mb && n->pmrdev) { + if (n->pmrdev) { if (host_memory_backend_is_mapped(n->pmrdev)) { error_setg(errp, "can't use already busy memdev: %s", object_get_canonical_path_component(OBJECT(n->pmrdev))); @@ -2902,9 +2901,6 @@ static void nvme_init_cmb(NvmeCtrl *n, PCIDevice *pci_dev) static void nvme_init_pmr(NvmeCtrl *n, PCIDevice *pci_dev) { - /* Controller Capabilities register */ - NVME_CAP_SET_PMRS(n->bar.cap, 1); - /* PMR Capabities register */ n->bar.pmrcap = 0; NVME_PMRCAP_SET_RDS(n->bar.pmrcap, 0); @@ -2997,7 +2993,9 @@ static void nvme_init_pci(NvmeCtrl *n, PCIDevice *pci_dev, Error **errp) if (n->params.cmb_size_mb) { nvme_init_cmb(n, pci_dev); - } else if (n->pmrdev) { + } + + if (n->pmrdev) { nvme_init_pmr(n, pci_dev); } } @@ -3067,6 +3065,7 @@ static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice *pci_dev) NVME_CAP_SET_CSS(n->bar.cap, NVME_CAP_CSS_ADMIN_ONLY); NVME_CAP_SET_MPSMAX(n->bar.cap, 4); NVME_CAP_SET_CMBS(n->bar.cap, n->params.cmb_size_mb ? 1 : 0); + NVME_CAP_SET_PMRS(n->bar.cap, n->pmrdev ? 1 : 0); n->bar.vs = NVME_SPEC_VER; n->bar.intmc = n->bar.intms = 0; -- 2.29.2