Arch maintainers, please ack/review patches.
This is a resend of a series from Frank last year[1]. I worked in Rob's
review comments to unconditionally call unflatten_device_tree() and
fixup/audit calls to of_have_populated_dt() so that behavior doesn't
change.
I need this series so I can add DT
Call this function unconditionally so that we can populate an empty DTB
on platforms that don't boot with a command line provided DTB. There's
no harm in calling unflatten_device_tree() unconditionally. If there
isn't a valid initial_boot_params dtb then unflatten_device_tree()
returns early.
Cc:
Call this function unconditionally so that we can populate an empty DTB
on platforms that don't boot with a firmware provided or builtin DTB.
Override 'initial_boot_params' to NULL when ACPI is in use but the
bootloader has loaded a DTB so that we don't allow both ACPI and DT to
be used during boot
From: Frank Rowand
When enabling CONFIG_OF on a platform where 'of_root' is not populated
by firmware, we end up without a root node. In order to apply overlays
and create subnodes of the root node, we need one. Create this root node
by unflattening an empty builtin dtb.
If firmware provides a f
We want to populate an empty DT whenever CONFIG_OF is enabled so that
overlays can be applied and the DT unit tests can be run. Make
unflatten_and_copy_device_tree() stop printing a warning if the
'initial_boot_params' pointer is NULL. Instead, simply copy the dtb if
there is one and then unflatten
Call this function unconditionally so that we can populate an empty DTB
on platforms that don't boot with a firmware provided or builtin DTB.
Cc: Rob Herring
Cc: Frank Rowand
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Borislav Petkov
Cc: Dave Hansen
Cc:
Cc: "H. Peter Anvin"
Cc: Saurabh Sengar
From: Frank Rowand
unflatten_device_tree() now ensures that the 'of_root' node is populated
with the root of a default empty devicetree. Remove the unittest code
that created 'of_root' if it was missing. Verify that 'of_root' is valid
before attempting to attach the testcase-data subtree. Remove
Add a KUnit test that confirms a DTB has been loaded, i.e. there is a
root node, and that the of_have_populated_dt() API works properly.
Cc: Rob Herring
Cc: Frank Rowand
Cc: David Gow
Cc: Brendan Higgins
Signed-off-by: Stephen Boyd
---
drivers/of/.kunitconfig | 3 +++
drivers/of/Kconfig
In the functions vring_unmap_extra_packed and vring_unmap_desc_packed,
multiple checks are made whether unmap is performed and whether it is
INDIRECT.
These two functions are usually called in a loop, and we should put the
check outside the loop.
And we unmap the descs with VRING_DESC_F_INDIRECT
To make the code readable, introduce vring_need_unmap_buffer() to
replace do_unmap.
use_dma_api premapped -> vring_need_unmap_buffer()
1. false falsefalse
2. truefalsetrue
3. truetrue false
Signed-off-by: Xuan Zhuo
---
drivers/virtio/virtio_ring.
As discussed:
http://lore.kernel.org/all/cacgkmevq0no8qgc46u4mgsmtud44fd_cflcpavmj3rhyqrz...@mail.gmail.com
If the virtio is premapped mode, the driver should manage the dma info by self.
So the virtio core should not store the dma info.
So we can release the memory used to store the dma info.
Bu
In the functions vring_unmap_one_split and
vring_unmap_one_split_indirect,
multiple checks are made whether unmap is performed and whether it is
INDIRECT.
These two functions are usually called in a loop, and we should put the
check outside the loop.
And we unmap the descs with VRING_DESC_F_INDIR
This commit structure the indirect desc table.
Then we can get the desc num directly when doing unmap.
And save the dma info to the struct, then the indirect
will not use the dma fields of the desc_extra. The subsequent
commits will make the dma fields are optional. But for
the indirect case, we m
As discussed:
http://lore.kernel.org/all/CACGkMEug-=C+VQhkMYSgUKMC==04m7-uem_yc21bggkkzh8...@mail.gmail.com
When the vq is premapped mode, the driver manages the dma
info is a good way.
So this commit make the virtio core not to store the dma
info and release the memory which is used to store the
This commit structure the indirect desc table.
Then we can get the desc num directly when doing unmap.
And save the dma info to the struct, then the indirect
will not use the dma fields of the desc_extra. The subsequent
commits will make the dma fields are optional. But for
the indirect case, we m
Export the premapped to drivers, then drivers can check
the vq premapped mode after the find_vqs().
Because the find_vqs() just try to enable the vq premapped mode,
the driver must check that after find_vqs().
Signed-off-by: Xuan Zhuo
---
drivers/virtio/virtio_ring.c | 17 +++--
incl
Now, the virtio core can set the premapped mode by find_vqs().
If the premapped can be enabled, the dma array will not be
allocated. So virtio-net use the api of find_vqs to enable the
premapped.
Judge the premapped mode by the vq->premapped instead of saving
local variable.
Signed-off-by: Xuan Z
If the premapped mode is enabled, the dma array(struct vring_desc_dma) of
virtio core will not be allocated. That is judged when find_vqs() is called.
To avoid allocating dma array in find_vqs() and releasing it immediately by
virtqueue_set_dma_premapped(). This patch introduces a new parameter to
The virtio-net sq will use these APIs to map the scatterlist.
For scatterlist, the page dma APIs are more appropriate.
dma_addr_t virtqueue_dma_map_page_attrs(struct virtqueue *_vq, struct page
*page,
size_t offset, size_t size,
The virtio-net sets the premapped mode by find_vqs().
So the below API is not used by anyone, we remove it.
int virtqueue_set_dma_premapped(struct virtqueue *_vq);
Signed-off-by: Xuan Zhuo
---
drivers/virtio/virtio_ring.c | 56
include/linux/virtio.h
Since free_old_xmit_skbs not only deals with skb, but also xdp frame and
subsequent added xsk, so change the name of this function to
free_old_xmit.
Signed-off-by: Xuan Zhuo
Acked-by: Jason Wang
---
drivers/net/virtio_net.c | 10 +-
1 file changed, 5 insertions(+), 5 deletions(-)
diff
If the xsk is enabling, the xsk tx will share the send queue.
But the xsk requires that the send queue use the premapped mode.
So the send queue must support premapped mode.
Signed-off-by: Xuan Zhuo
---
drivers/net/virtio_net.c | 167 ++-
1 file changed, 163 i
There are two completely similar and independent implementations. This
is inconvenient for the subsequent addition of new types. So extract a
function from this piece of code and call this function uniformly to
recover old xmit ptr.
Signed-off-by: Xuan Zhuo
Acked-by: Jason Wang
---
drivers/net/
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