[PATCH] hw/nvme: add knob for CTRATT.MEM

[Klaus Jensen]

From: Klaus Jensen <k.jensen@samsung.com>

Add a boolean prop (ctratt.mem) for setting CTRATT.MEM and default it to
unset (false) to keep existing behavior of the device intact.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/nvme/ctrl.c | 7 ++++++-
 hw/nvme/nvme.h | 4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index f36c45931821..8556f3e61fa0 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -8492,7 +8492,11 @@ static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice 
*pci_dev)
     id->cntlid = cpu_to_le16(n->cntlid);
 
     id->oaes = cpu_to_le32(NVME_OAES_NS_ATTR);
-    ctratt = NVME_CTRATT_ELBAS | NVME_CTRATT_MEM;
+
+    ctratt = NVME_CTRATT_ELBAS;
+    if (n->params.ctratt.mem) {
+        ctratt |= NVME_CTRATT_MEM;
+    }
 
     id->rab = 6;
 
@@ -8751,6 +8755,7 @@ static Property nvme_props[] = {
                      false),
     DEFINE_PROP_UINT16("mqes", NvmeCtrl, params.mqes, 0x7ff),
     DEFINE_PROP_UINT16("spdm_port", PCIDevice, spdm_port, 0),
+    DEFINE_PROP_BOOL("ctratt.mem", NvmeCtrl, params.ctratt.mem, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/nvme/nvme.h b/hw/nvme/nvme.h
index 781985754d0d..bd3c6ba33a67 100644
--- a/hw/nvme/nvme.h
+++ b/hw/nvme/nvme.h
@@ -538,6 +538,10 @@ typedef struct NvmeParams {
     uint32_t  sriov_max_vq_per_vf;
     uint32_t  sriov_max_vi_per_vf;
     bool     msix_exclusive_bar;
+
+    struct {
+        bool mem;
+    } ctratt;
 } NvmeParams;
 
 typedef struct NvmeCtrl {

---
base-commit: 3245de3f3d002bc9ce2ecae61e8d86cb9e375808
change-id: 20240924-add-ctratt-mem-knob-ae4431251cb1

Best regards,
-- 
Klaus Jensen <k.jensen@samsung.com>