docs/man/xl.cfg.5.pod.in | 8 ++++++++ tools/golang/xenlight/helpers.gen.go | 6 ++++++ tools/golang/xenlight/types.gen.go | 1 + tools/libs/light/libxl_arm.c | 22 +++++++++++++--------- tools/libs/light/libxl_types.idl | 1 + tools/libs/light/libxl_virtio.c | 23 +++++++++++++++++++++-- tools/xl/xl_parse.c | 2 ++ 7 files changed, 52 insertions(+), 11 deletions(-)
Currently, the grant mapping related device tree properties are added if
the backend domain is not Dom0. While Dom0 is privileged and can do
foreign mapping for the entire guest memory, it is still desired for
Dom0 to access guest's memory via grant mappings and hence map only what
is required.
This commit adds the "grant_usage" parameter for virtio devices, which
provides better control over the functionality.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
V3->V3.1:
- Print "0" or "1" in xenstore instead of "True" or "False" for grant_usage.
docs/man/xl.cfg.5.pod.in | 8 ++++++++
tools/golang/xenlight/helpers.gen.go | 6 ++++++
tools/golang/xenlight/types.gen.go | 1 +
tools/libs/light/libxl_arm.c | 22 +++++++++++++---------
tools/libs/light/libxl_types.idl | 1 +
tools/libs/light/libxl_virtio.c | 23 +++++++++++++++++++++--
tools/xl/xl_parse.c | 2 ++
7 files changed, 52 insertions(+), 11 deletions(-)
diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in
index 24ac92718288..3a40ac8cb322 100644
--- a/docs/man/xl.cfg.5.pod.in
+++ b/docs/man/xl.cfg.5.pod.in
@@ -1619,6 +1619,14 @@ hexadecimal format, without the "0x" prefix and all in lower case, like
Specifies the transport mechanism for the Virtio device, only "mmio" is
supported for now.
+=item B<grant_usage=BOOLEAN>
+
+If this option is B<true>, the Xen grants are always enabled.
+If this option is B<false>, the Xen grants are always disabled.
+
+If this option is missing, then the default grant setting will be used,
+i.e. enable grants if backend-domid != 0.
+
=back
=item B<tee="STRING">
diff --git a/tools/golang/xenlight/helpers.gen.go b/tools/golang/xenlight/helpers.gen.go
index 0a203d22321f..bf846dca8ec0 100644
--- a/tools/golang/xenlight/helpers.gen.go
+++ b/tools/golang/xenlight/helpers.gen.go
@@ -1792,6 +1792,9 @@ func (x *DeviceVirtio) fromC(xc *C.libxl_device_virtio) error {
x.BackendDomname = C.GoString(xc.backend_domname)
x.Type = C.GoString(xc._type)
x.Transport = VirtioTransport(xc.transport)
+if err := x.GrantUsage.fromC(&xc.grant_usage);err != nil {
+return fmt.Errorf("converting field GrantUsage: %v", err)
+}
x.Devid = Devid(xc.devid)
x.Irq = uint32(xc.irq)
x.Base = uint64(xc.base)
@@ -1809,6 +1812,9 @@ xc.backend_domname = C.CString(x.BackendDomname)}
if x.Type != "" {
xc._type = C.CString(x.Type)}
xc.transport = C.libxl_virtio_transport(x.Transport)
+if err := x.GrantUsage.toC(&xc.grant_usage); err != nil {
+return fmt.Errorf("converting field GrantUsage: %v", err)
+}
xc.devid = C.libxl_devid(x.Devid)
xc.irq = C.uint32_t(x.Irq)
xc.base = C.uint64_t(x.Base)
diff --git a/tools/golang/xenlight/types.gen.go b/tools/golang/xenlight/types.gen.go
index a7c17699f80e..e0c6e91bb0ef 100644
--- a/tools/golang/xenlight/types.gen.go
+++ b/tools/golang/xenlight/types.gen.go
@@ -683,6 +683,7 @@ BackendDomid Domid
BackendDomname string
Type string
Transport VirtioTransport
+GrantUsage Defbool
Devid Devid
Irq uint32
Base uint64
diff --git a/tools/libs/light/libxl_arm.c b/tools/libs/light/libxl_arm.c
index 97c80d7ed0fa..bc2bd9649b95 100644
--- a/tools/libs/light/libxl_arm.c
+++ b/tools/libs/light/libxl_arm.c
@@ -922,7 +922,8 @@ static int make_xen_iommu_node(libxl__gc *gc, void *fdt)
/* The caller is responsible to complete / close the fdt node */
static int make_virtio_mmio_node_common(libxl__gc *gc, void *fdt, uint64_t base,
- uint32_t irq, uint32_t backend_domid)
+ uint32_t irq, uint32_t backend_domid,
+ bool grant_usage)
{
int res;
gic_interrupt intr;
@@ -945,7 +946,7 @@ static int make_virtio_mmio_node_common(libxl__gc *gc, void *fdt, uint64_t base,
res = fdt_property(fdt, "dma-coherent", NULL, 0);
if (res) return res;
- if (backend_domid != LIBXL_TOOLSTACK_DOMID) {
+ if (grant_usage) {
uint32_t iommus_prop[2];
iommus_prop[0] = cpu_to_fdt32(GUEST_PHANDLE_IOMMU);
@@ -959,11 +960,12 @@ static int make_virtio_mmio_node_common(libxl__gc *gc, void *fdt, uint64_t base,
}
static int make_virtio_mmio_node(libxl__gc *gc, void *fdt, uint64_t base,
- uint32_t irq, uint32_t backend_domid)
+ uint32_t irq, uint32_t backend_domid,
+ bool grant_usage)
{
int res;
- res = make_virtio_mmio_node_common(gc, fdt, base, irq, backend_domid);
+ res = make_virtio_mmio_node_common(gc, fdt, base, irq, backend_domid, grant_usage);
if (res) return res;
return fdt_end_node(fdt);
@@ -1019,11 +1021,11 @@ static int make_virtio_mmio_node_gpio(libxl__gc *gc, void *fdt)
static int make_virtio_mmio_node_device(libxl__gc *gc, void *fdt, uint64_t base,
uint32_t irq, const char *type,
- uint32_t backend_domid)
+ uint32_t backend_domid, bool grant_usage)
{
int res;
- res = make_virtio_mmio_node_common(gc, fdt, base, irq, backend_domid);
+ res = make_virtio_mmio_node_common(gc, fdt, base, irq, backend_domid, grant_usage);
if (res) return res;
/* Add device specific nodes */
@@ -1363,7 +1365,8 @@ static int libxl__prepare_dtb(libxl__gc *gc, libxl_domain_config *d_config,
iommu_needed = true;
FDT( make_virtio_mmio_node(gc, fdt, disk->base, disk->irq,
- disk->backend_domid) );
+ disk->backend_domid,
+ disk->backend_domid != LIBXL_TOOLSTACK_DOMID) );
}
}
@@ -1373,12 +1376,13 @@ static int libxl__prepare_dtb(libxl__gc *gc, libxl_domain_config *d_config,
if (virtio->transport != LIBXL_VIRTIO_TRANSPORT_MMIO)
continue;
- if (virtio->backend_domid != LIBXL_TOOLSTACK_DOMID)
+ if (libxl_defbool_val(virtio->grant_usage))
iommu_needed = true;
FDT( make_virtio_mmio_node_device(gc, fdt, virtio->base,
virtio->irq, virtio->type,
- virtio->backend_domid) );
+ virtio->backend_domid,
+ libxl_defbool_val(virtio->grant_usage)) );
}
/*
diff --git a/tools/libs/light/libxl_types.idl b/tools/libs/light/libxl_types.idl
index c10292e0d7e3..c5c0d1f91793 100644
--- a/tools/libs/light/libxl_types.idl
+++ b/tools/libs/light/libxl_types.idl
@@ -740,6 +740,7 @@ libxl_device_virtio = Struct("device_virtio", [
("backend_domname", string),
("type", string),
("transport", libxl_virtio_transport),
+ ("grant_usage", libxl_defbool),
("devid", libxl_devid),
# Note that virtio-mmio parameters (irq and base) are for internal
# use by libxl and can't be modified.
diff --git a/tools/libs/light/libxl_virtio.c b/tools/libs/light/libxl_virtio.c
index f8a78e22d156..e5e321adc5c4 100644
--- a/tools/libs/light/libxl_virtio.c
+++ b/tools/libs/light/libxl_virtio.c
@@ -23,8 +23,16 @@ static int libxl__device_virtio_setdefault(libxl__gc *gc, uint32_t domid,
libxl_device_virtio *virtio,
bool hotplug)
{
- return libxl__resolve_domid(gc, virtio->backend_domname,
- &virtio->backend_domid);
+ int rc;
+
+ rc = libxl__resolve_domid(gc, virtio->backend_domname,
+ &virtio->backend_domid);
+ if (rc < 0) return rc;
+
+ libxl_defbool_setdefault(&virtio->grant_usage,
+ virtio->backend_domid != LIBXL_TOOLSTACK_DOMID);
+
+ return 0;
}
static int libxl__device_from_virtio(libxl__gc *gc, uint32_t domid,
@@ -53,6 +61,8 @@ static int libxl__set_xenstore_virtio(libxl__gc *gc, uint32_t domid,
flexarray_append_pair(back, "base", GCSPRINTF("%#"PRIx64, virtio->base));
flexarray_append_pair(back, "type", GCSPRINTF("%s", virtio->type));
flexarray_append_pair(back, "transport", GCSPRINTF("%s", transport));
+ flexarray_append_pair(back, "grant_usage",
+ libxl_defbool_val(virtio->grant_usage) ? "1" : "0");
return 0;
}
@@ -104,6 +114,15 @@ static int libxl__virtio_from_xenstore(libxl__gc *gc, const char *libxl_path,
}
}
+ tmp = NULL;
+ rc = libxl__xs_read_checked(gc, XBT_NULL,
+ GCSPRINTF("%s/grant_usage", be_path), &tmp);
+ if (rc) goto out;
+
+ if (tmp) {
+ libxl_defbool_set(&virtio->grant_usage, strtoul(tmp, NULL, 0));
+ }
+
tmp = NULL;
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/type", be_path), &tmp);
diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c
index 1f6f47daf4e1..c66b11fd01b2 100644
--- a/tools/xl/xl_parse.c
+++ b/tools/xl/xl_parse.c
@@ -1215,6 +1215,8 @@ static int parse_virtio_config(libxl_device_virtio *virtio, char *token)
} else if (MATCH_OPTION("transport", token, oparg)) {
rc = libxl_virtio_transport_from_string(oparg, &virtio->transport);
if (rc) return rc;
+ } else if (MATCH_OPTION("grant_usage", token, oparg)) {
+ libxl_defbool_set(&virtio->grant_usage, strtoul(oparg, NULL, 0));
} else {
fprintf(stderr, "Unknown string \"%s\" in virtio spec\n", token);
return -1;
--
2.31.1.272.g89b43f80a514On Tue, Jun 13, 2023 at 11:32:16AM +0530, Viresh Kumar wrote: > Currently, the grant mapping related device tree properties are added if > the backend domain is not Dom0. While Dom0 is privileged and can do > foreign mapping for the entire guest memory, it is still desired for > Dom0 to access guest's memory via grant mappings and hence map only what > is required. > > This commit adds the "grant_usage" parameter for virtio devices, which > provides better control over the functionality. > > Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> > --- > V3->V3.1: > - Print "0" or "1" in xenstore instead of "True" or "False" for grant_usage. Reviewed-by: Anthony PERARD <anthony.perard@citrix.com> Thanks, -- Anthony PERARD
On 13-06-23, 11:48, Anthony PERARD wrote: > On Tue, Jun 13, 2023 at 11:32:16AM +0530, Viresh Kumar wrote: > > Currently, the grant mapping related device tree properties are added if > > the backend domain is not Dom0. While Dom0 is privileged and can do > > foreign mapping for the entire guest memory, it is still desired for > > Dom0 to access guest's memory via grant mappings and hence map only what > > is required. > > > > This commit adds the "grant_usage" parameter for virtio devices, which > > provides better control over the functionality. > > > > Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> > > --- > > V3->V3.1: > > - Print "0" or "1" in xenstore instead of "True" or "False" for grant_usage. > > Reviewed-by: Anthony PERARD <anthony.perard@citrix.com> Hi, I still don't see this patch pushed upstream. Are we waiting for some release to happen ? Thanks. -- viresh
Hi,
On 30/06/2023 05:40, Viresh Kumar wrote:
> On 13-06-23, 11:48, Anthony PERARD wrote:
>> On Tue, Jun 13, 2023 at 11:32:16AM +0530, Viresh Kumar wrote:
>>> Currently, the grant mapping related device tree properties are added if
>>> the backend domain is not Dom0. While Dom0 is privileged and can do
>>> foreign mapping for the entire guest memory, it is still desired for
>>> Dom0 to access guest's memory via grant mappings and hence map only what
>>> is required.
>>>
>>> This commit adds the "grant_usage" parameter for virtio devices, which
>>> provides better control over the functionality.
>>>
>>> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
>>> ---
>>> V3->V3.1:
>>> - Print "0" or "1" in xenstore instead of "True" or "False" for grant_usage.
>>
>> Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
>
> Hi,
>
> I still don't see this patch pushed upstream. Are we waiting for some
> release to happen ?
The patch is missing an ack from the golang maintainers. I noticed you
didn't CC them (done now).
In the future, I would suggest to use one of the scripts in the repo to
find the appropriate maintainers:
* scripts/get_maintainers.pl: It will output the list of maintainers
* scripts/add_maintainers.pl: It will add the maintainers for each
patch files in a given directory.
Cheers,
--
Julien Grall
(correcting the e-mail from Nick) On 30/06/2023 09:40, Julien Grall wrote: > Hi, > > On 30/06/2023 05:40, Viresh Kumar wrote: >> On 13-06-23, 11:48, Anthony PERARD wrote: >>> On Tue, Jun 13, 2023 at 11:32:16AM +0530, Viresh Kumar wrote: >>>> Currently, the grant mapping related device tree properties are >>>> added if >>>> the backend domain is not Dom0. While Dom0 is privileged and can do >>>> foreign mapping for the entire guest memory, it is still desired for >>>> Dom0 to access guest's memory via grant mappings and hence map only >>>> what >>>> is required. >>>> >>>> This commit adds the "grant_usage" parameter for virtio devices, which >>>> provides better control over the functionality. >>>> >>>> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> >>>> --- >>>> V3->V3.1: >>>> - Print "0" or "1" in xenstore instead of "True" or "False" for >>>> grant_usage. >>> >>> Reviewed-by: Anthony PERARD <anthony.perard@citrix.com> >> >> Hi, >> >> I still don't see this patch pushed upstream. Are we waiting for some >> release to happen ? > > The patch is missing an ack from the golang maintainers. I noticed you > didn't CC them (done now). > > In the future, I would suggest to use one of the scripts in the repo to > find the appropriate maintainers: > * scripts/get_maintainers.pl: It will output the list of maintainers > * scripts/add_maintainers.pl: It will add the maintainers for each > patch files in a given directory. > > Cheers, > -- Julien Grall
On 30-06-23, 09:40, Julien Grall wrote: > The patch is missing an ack from the golang maintainers. I noticed you > didn't CC them (done now). Ahh, thanks. > In the future, I would suggest to use one of the scripts in the repo to find > the appropriate maintainers: > * scripts/get_maintainers.pl: It will output the list of maintainers > * scripts/add_maintainers.pl: It will add the maintainers for each > patch files in a given directory. Right. -- viresh
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