[Xen-devel] [v3][PATCH 10/16] tools: extend xc_assign_device() to support rdm reservation policy

[Tiejun Chen <tiejun.chen@xxxxxxxxx>]

This patch passes rdm reservation policy to xc_assign_device() so the policy
is checked when assigning devices to a VM.

Signed-off-by: Tiejun Chen <tiejun.chen@xxxxxxxxx>
---
 tools/libxc/include/xenctrl.h       |  3 ++-
 tools/libxc/xc_domain.c             |  6 +++++-
 tools/libxl/libxl_pci.c             |  3 ++-
 tools/ocaml/libs/xc/xenctrl_stubs.c | 18 ++++++++++++++----
 tools/python/xen/lowlevel/xc/xc.c   | 29 +++++++++++++++++++----------
 5 files changed, 42 insertions(+), 17 deletions(-)

diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 6c01362..7fd60d5 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -2078,7 +2078,8 @@ int xc_hvm_destroy_ioreq_server(xc_interface *xch,
 /* HVM guest pass-through */
 int xc_assign_device(xc_interface *xch,
                      uint32_t domid,
-                     uint32_t machine_sbdf);
+                     uint32_t machine_sbdf,
+                     uint32_t flag);
 
 int xc_get_device_group(xc_interface *xch,
                      uint32_t domid,
diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
index 4f96e1b..19127ec 100644
--- a/tools/libxc/xc_domain.c
+++ b/tools/libxc/xc_domain.c
@@ -1697,7 +1697,8 @@ int xc_domain_setdebugging(xc_interface *xch,
 int xc_assign_device(
     xc_interface *xch,
     uint32_t domid,
-    uint32_t machine_sbdf)
+    uint32_t machine_sbdf,
+    uint32_t flag)
 {
     DECLARE_DOMCTL;
 
@@ -1705,6 +1706,7 @@ int xc_assign_device(
     domctl.domain = domid;
     domctl.u.assign_device.dev = XEN_DOMCTL_DEV_PCI;
     domctl.u.assign_device.u.pci.machine_sbdf = machine_sbdf;
+    domctl.u.assign_device.flag = flag;
 
     return do_domctl(xch, &domctl);
 }
@@ -1792,6 +1794,8 @@ int xc_assign_dt_device(
 
     domctl.u.assign_device.dev = XEN_DOMCTL_DEV_DT;
     domctl.u.assign_device.u.dt.size = size;
+    /* DT doesn't own any RDM. */
+    domctl.u.assign_device.flag = XEN_DOMCTL_DEV_NO_RDM;
     set_xen_guest_handle(domctl.u.assign_device.u.dt.path, path);
 
     rc = do_domctl(xch, &domctl);
diff --git a/tools/libxl/libxl_pci.c b/tools/libxl/libxl_pci.c
index e0743f8..632c15e 100644
--- a/tools/libxl/libxl_pci.c
+++ b/tools/libxl/libxl_pci.c
@@ -894,6 +894,7 @@ static int do_pci_add(libxl__gc *gc, uint32_t domid, 
libxl_device_pci *pcidev, i
     FILE *f;
     unsigned long long start, end, flags, size;
     int irq, i, rc, hvm = 0;
+    uint32_t flag = XEN_DOMCTL_DEV_RDM_RELAXED;
 
     if (type == LIBXL_DOMAIN_TYPE_INVALID)
         return ERROR_FAIL;
@@ -987,7 +988,7 @@ static int do_pci_add(libxl__gc *gc, uint32_t domid, 
libxl_device_pci *pcidev, i
 
 out:
     if (!libxl_is_stubdom(ctx, domid, NULL)) {
-        rc = xc_assign_device(ctx->xch, domid, pcidev_encode_bdf(pcidev));
+        rc = xc_assign_device(ctx->xch, domid, pcidev_encode_bdf(pcidev), 
flag);
         if (rc < 0 && (hvm || errno != ENOSYS)) {
             LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "xc_assign_device failed");
             return ERROR_FAIL;
diff --git a/tools/ocaml/libs/xc/xenctrl_stubs.c 
b/tools/ocaml/libs/xc/xenctrl_stubs.c
index 64f1137..317bf75 100644
--- a/tools/ocaml/libs/xc/xenctrl_stubs.c
+++ b/tools/ocaml/libs/xc/xenctrl_stubs.c
@@ -1172,12 +1172,19 @@ CAMLprim value stub_xc_domain_test_assign_device(value 
xch, value domid, value d
        CAMLreturn(Val_bool(ret == 0));
 }
 
-CAMLprim value stub_xc_domain_assign_device(value xch, value domid, value desc)
+static int domain_assign_device_rdm_flag_table[] = {
+    XEN_DOMCTL_DEV_NO_RDM,
+    XEN_DOMCTL_DEV_RDM_RELAXED,
+    XEN_DOMCTL_DEV_RDM_STRICT,
+};
+
+CAMLprim value stub_xc_domain_assign_device(value xch, value domid, value desc,
+                                            value rflag)
 {
-       CAMLparam3(xch, domid, desc);
+       CAMLparam4(xch, domid, desc, rflag);
        int ret;
        int domain, bus, dev, func;
-       uint32_t sbdf;
+       uint32_t sbdf, flag;
 
        domain = Int_val(Field(desc, 0));
        bus = Int_val(Field(desc, 1));
@@ -1185,7 +1192,10 @@ CAMLprim value stub_xc_domain_assign_device(value xch, 
value domid, value desc)
        func = Int_val(Field(desc, 3));
        sbdf = encode_sbdf(domain, bus, dev, func);
 
-       ret = xc_assign_device(_H(xch), _D(domid), sbdf);
+       ret = Int_val(Field(rflag, 0));
+       flag = domain_assign_device_rdm_flag_table[ret];
+
+       ret = xc_assign_device(_H(xch), _D(domid), sbdf, flag);
 
        if (ret < 0)
                failwith_xc(_H(xch));
diff --git a/tools/python/xen/lowlevel/xc/xc.c 
b/tools/python/xen/lowlevel/xc/xc.c
index c77e15b..172bdf0 100644
--- a/tools/python/xen/lowlevel/xc/xc.c
+++ b/tools/python/xen/lowlevel/xc/xc.c
@@ -592,7 +592,8 @@ static int token_value(char *token)
     return strtol(token, NULL, 16);
 }
 
-static int next_bdf(char **str, int *seg, int *bus, int *dev, int *func)
+static int next_bdf(char **str, int *seg, int *bus, int *dev, int *func,
+                    int *flag)
 {
     char *token;
 
@@ -607,8 +608,16 @@ static int next_bdf(char **str, int *seg, int *bus, int 
*dev, int *func)
     *dev  = token_value(token);
     token = strchr(token, ',') + 1;
     *func  = token_value(token);
-    token = strchr(token, ',');
-    *str = token ? token + 1 : NULL;
+    token = strchr(token, ',') + 1;
+    if ( token ) {
+        *flag = token_value(token);
+        *str = token + 1;
+    }
+    else
+    {
+        *flag = XEN_DOMCTL_DEV_RDM_STRICT;
+        *str = NULL;
+    }
 
     return 1;
 }
@@ -620,14 +629,14 @@ static PyObject *pyxc_test_assign_device(XcObject *self,
     uint32_t dom;
     char *pci_str;
     int32_t sbdf = 0;
-    int seg, bus, dev, func;
+    int seg, bus, dev, func, flag;
 
     static char *kwd_list[] = { "domid", "pci", NULL };
     if ( !PyArg_ParseTupleAndKeywords(args, kwds, "is", kwd_list,
                                       &dom, &pci_str) )
         return NULL;
 
-    while ( next_bdf(&pci_str, &seg, &bus, &dev, &func) )
+    while ( next_bdf(&pci_str, &seg, &bus, &dev, &func, &flag) )
     {
         sbdf = seg << 16;
         sbdf |= (bus & 0xff) << 8;
@@ -653,21 +662,21 @@ static PyObject *pyxc_assign_device(XcObject *self,
     uint32_t dom;
     char *pci_str;
     int32_t sbdf = 0;
-    int seg, bus, dev, func;
+    int seg, bus, dev, func, flag;
 
     static char *kwd_list[] = { "domid", "pci", NULL };
     if ( !PyArg_ParseTupleAndKeywords(args, kwds, "is", kwd_list,
                                       &dom, &pci_str) )
         return NULL;
 
-    while ( next_bdf(&pci_str, &seg, &bus, &dev, &func) )
+    while ( next_bdf(&pci_str, &seg, &bus, &dev, &func, &flag) )
     {
         sbdf = seg << 16;
         sbdf |= (bus & 0xff) << 8;
         sbdf |= (dev & 0x1f) << 3;
         sbdf |= (func & 0x7);
 
-        if ( xc_assign_device(self->xc_handle, dom, sbdf) != 0 )
+        if ( xc_assign_device(self->xc_handle, dom, sbdf, flag) != 0 )
         {
             if (errno == ENOSYS)
                 sbdf = -1;
@@ -686,14 +695,14 @@ static PyObject *pyxc_deassign_device(XcObject *self,
     uint32_t dom;
     char *pci_str;
     int32_t sbdf = 0;
-    int seg, bus, dev, func;
+    int seg, bus, dev, func, flag;
 
     static char *kwd_list[] = { "domid", "pci", NULL };
     if ( !PyArg_ParseTupleAndKeywords(args, kwds, "is", kwd_list,
                                       &dom, &pci_str) )
         return NULL;
 
-    while ( next_bdf(&pci_str, &seg, &bus, &dev, &func) )
+    while ( next_bdf(&pci_str, &seg, &bus, &dev, &func, &flag) )
     {
         sbdf = seg << 16;
         sbdf |= (bus & 0xff) << 8;
-- 
1.9.1


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