[Xen-devel] [RFC XEN PATCH v3 22/39] tools/xen-ndctl: add command 'setup-data'

[Haozhong Zhang <haozhong.zhang@xxxxxxxxx>]

This command is to query Xen hypervisor to setup the specified PMEM
range for guest data usage.

Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
---
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 tools/misc/xen-ndctl.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/tools/misc/xen-ndctl.c b/tools/misc/xen-ndctl.c
index 058f8ccaf5..320633ae05 100644
--- a/tools/misc/xen-ndctl.c
+++ b/tools/misc/xen-ndctl.c
@@ -37,6 +37,7 @@ static int handle_help(int argc, char *argv[]);
 static int handle_list(int argc, char *argv[]);
 static int handle_list_cmds(int argc, char *argv[]);
 static int handle_setup_mgmt(int argc, char *argv[]);
+static int handle_setup_data(int argc, char *argv[]);
 
 static const struct xen_ndctl_cmd
 {
@@ -72,6 +73,18 @@ static const struct xen_ndctl_cmd
         .handler = handle_list_cmds,
     },
 
+    {
+        .name    = "setup-data",
+        .syntax  = "<smfn> <emfn> <mgmt_smfn> <mgmt_emfn>",
+        .help    = "Setup a PMEM region from MFN 'smfn' to 'emfn' for guest 
data usage,\n"
+                   "which can be used as the backend of the virtual NVDIMM 
devices.\n\n"
+                   "PMEM pages from MFN 'mgmt_smfn' to 'mgmt_emfn' is used to 
manage\n"
+                   "the above PMEM region, and should not overlap with MFN 
from 'smfn'\n"
+                   "to 'emfn'.\n",
+        .handler = handle_setup_data,
+        .need_xc = true,
+    },
+
     {
         .name    = "setup-mgmt",
         .syntax  = "<smfn> <emfn>",
@@ -277,6 +290,29 @@ static int handle_setup_mgmt(int argc, char **argv)
     return xc_nvdimm_pmem_setup_mgmt(xch, smfn, emfn);
 }
 
+static int handle_setup_data(int argc, char **argv)
+{
+    unsigned long smfn, emfn, mgmt_smfn, mgmt_emfn;
+
+    if ( argc < 5 )
+    {
+        fprintf(stderr, "Too few arguments.\n\n");
+        show_help(argv[0]);
+        return -EINVAL;
+    }
+
+    if ( !string_to_mfn(argv[1], &smfn) ||
+         !string_to_mfn(argv[2], &emfn) ||
+         !string_to_mfn(argv[3], &mgmt_smfn) ||
+         !string_to_mfn(argv[4], &mgmt_emfn) )
+        return -EINVAL;
+
+    if ( argc > 5 )
+        return handle_unrecognized_argument(argv[0], argv[5]);
+
+    return xc_nvdimm_pmem_setup_data(xch, smfn, emfn, mgmt_smfn, mgmt_emfn);
+}
+
 int main(int argc, char *argv[])
 {
     unsigned int i;
-- 
2.14.1


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