hw/block/nvme: improve invalid zasl value reporting

The Zone Append Size Limit (ZASL) must be at least 4096 bytes, so
improve the user experience by adding an early parameter check in
nvme_check_constraints.

When ZASL is still too small due to the host configuring the device for
an even larger page size, convert the trace point in nvme_start_ctrl to
an NVME_GUEST_ERR such that this is logged by QEMU instead of only
traced.

Reported-by: Corne <info@dantalion.nl>
Cc: Dmitry Fomichev <Dmitry.Fomichev@wdc.com>
Reviewed-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 56ef07b..2addaf7 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -3997,8 +3997,10 @@ static int nvme_start_ctrl(NvmeCtrl *n)
         n->zasl = n->params.mdts;
     } else {
         if (n->params.zasl_bs < n->page_size) {
-            trace_pci_nvme_err_startfail_zasl_too_small(n->params.zasl_bs,
-                                                        n->page_size);
+            NVME_GUEST_ERR(pci_nvme_err_startfail_zasl_too_small,
+                           "Zone Append Size Limit (ZASL) of %d bytes is too "
+                           "small; must be at least %d bytes",
+                           n->params.zasl_bs, n->page_size);
             return -1;
         }
         n->zasl = 31 - clz32(n->params.zasl_bs / n->page_size);
@@ -4517,6 +4519,12 @@ static void nvme_check_constraints(NvmeCtrl *n, Error **errp)
             error_setg(errp, "zone append size limit has to be a power of 2");
             return;
         }
+
+        if (n->params.zasl_bs < 4096) {
+            error_setg(errp, "zone append size limit must be at least "
+                       "4096 bytes");
+            return;
+        }
     }
 }