aviour?
[{ "start": 0, "length": 1073741824, "depth": 0, "present": true, "zero":
false, "data": true, "compressed": false, "offset": 0}]
Regards,
Prashant
On Mon, Apr 7, 2025 at 8:24 PM Eric Blake wrote:
> On Mon, Apr
t;: false, "data": true, "compressed": false, "offset": 346947584},
{ "start": 347078656, "length": 65536, "depth": 0, "present": false,
"zero": false, "data": false, "compressed": false},
{ "s
bin/qemu-system-x86_64 --version
QEMU emulator version 9.0.2 (pve-qemu-kvm_9.0.2-4)
Best regards,
Prashant
This message was sent by an employee of Arctera.
ow if there is any other better alternative to do the same.
Thanks
Prashant
On Fri, Feb 28, 2025 at 3:53 AM Eric Blake wrote:
> On Wed, Feb 19, 2025 at 04:23:26PM +0530, prashant patil wrote:
> > Hello All,
> > Hope this email finds you well.
> >
> > I have been tryin
ded very small data after the bitmap was enabled. Bitmap output has
been pasted below.
[{ "start": 0, "length": 5368709120, "depth": 0, "present": true, "zero":
false, "data": true, "compressed": false, "offset": 0}]
Can someone please help me understand why the bitmap content shows the
entire disk as dirty?
Regards
Prashant
,
Prashant
d the version where the issue is fixed.
May be that helps.
And how do analyse this error info.
Regards,
Prashant
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1877526
Title:
KVM internal crash
Stat
: qemu-kvm
Arch: x86_64
Epoch : 10
Version : 1.5.3
How do I investigate this?
I would need to patch up the qemu-kvm on the host to get this fixed, I think.
Please let me know if I need to provide more info, (and what?)
Regards,
Prashant
** Affects: qemu
Importance: Und
On 12/2/19 11:47 AM, Jason Wang wrote:
On 2019/12/2 上午12:45, David Ahern wrote:
On 11/26/19 4:07 AM, Prashant Bhole wrote:
From: Jason Wang
This patch introduces an ioctl way to set an offloaded XDP program
to tun driver. This ioctl will be used by qemu to offload XDP program
from
On 11/28/19 5:42 AM, Michael S. Tsirkin wrote:
On Tue, Nov 26, 2019 at 07:07:41PM +0900, Prashant Bhole wrote:
From: Jason Wang
This patch implements bpf_prog_offload_ops callbacks and adds handling
for XDP_SETUP_PROG_HW. Handling of XDP_SETUP_PROG_HW involves setting
up struct
-test/src/net/tap-linux.c:34:21: fatal error: bpf/bpf.h: No such file
or directory
#include
Sorry, I missed to enclose it in #ifdef CONFIG_LIBBPF.
It should be fixed whenever I'll post next revision.
Prashant
^
compilation terminated.
---
SIGNpc-bios/opti
will get a chance to perform the fd replacement in its own copy of the
program.
Solution:
Let's introduce a setup() callback in bpf_prog_offload_ops. It will be
non mandetory. The verifier will call it just before replacing the map
fds.
Signed-off-by: Jason Wang
Signed-off-by: Prashant
eneric_xdp_core()
net: core: export do_xdp_generic_core()
tun: set offloaded xdp program
virtio-net: store xdp_prog in device
virtio_net: add XDP prog offload infrastructure
virtio_net: implement XDP prog offload functionality
bpf: export function __bpf_map_get
virtio_net: implmen
From: Jason Wang
This patch introduces an ioctl way to set an offloaded XDP program
to tun driver. This ioctl will be used by qemu to offload XDP program
from virtio_net in the guest.
Signed-off-by: Jason Wang
Signed-off-by: Prashant Bhole
---
drivers/net/tun.c | 19
y are passed
to vhost_net.
Signed-off-by: Prashant Bhole
---
drivers/net/tap.c | 22 ++-
drivers/net/tun.c | 24 -
drivers/vhost/net.c| 48 +++---
include/linux/if_tun.h | 18
4 files change
ent, it is considered as
XDP_TX'ed packet from offloaded program.
Signed-off-by: Prashant Bhole
---
drivers/net/tun.c | 35 ---
1 file changed, 28 insertions(+), 7 deletions(-)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 466ea69f00ee..8d6cdd3e51
eaves the action handling to us.
Signed-off-by: Prashant Bhole
---
drivers/net/tun.c | 149 +-
1 file changed, 146 insertions(+), 3 deletions(-)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index ecb49101b0b5..466ea69f00ee 100644
--- a/drivers/net/
From: Jason Wang
This is a preparation for adding XDP offload support in virtio_net
driver. By storing XDP program in virtionet_info will make it
consistent with the offloaded program which will introduce in next
patches.
Signed-off-by: Jason Wang
Co-developed-by: Prashant Bhole
Signed-off-by
: Prashant Bhole
Signed-off-by: Prashant Bhole
---
drivers/net/virtio_net.c | 103 +++
1 file changed, 103 insertions(+)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index cee5c2b15c62..a1088d0114f2 100644
--- a/drivers/net/virtio_net.c
+++ b
.
Signed-off-by: Jason Wang
Co-developed-by: Prashant Bhole
Signed-off-by: Prashant Bhole
---
drivers/net/virtio_net.c| 114 +++-
include/uapi/linux/virtio_net.h | 27
2 files changed, 139 insertions(+), 2 deletions(-)
diff --git a/drivers/net
by renaming it.
Signed-off-by: Jason Wang
Signed-off-by: Prashant Bhole
---
net/core/dev.c | 8
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index c7fc902ccbdc..5ae647b9914f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4461,9
tory yet. Hence changes to virtio_net.h
are for RFC purpose only.
Jason Wang (2):
virtio-net: add support for offloading XDP program
virtio-net: add support for offloading an ebpf map
Prashant Bhole (1):
configure: add libbpf support
configure |
Remove usage of ptr ring of tuntap in vhost_net and remove the
functions exported from tuntap drivers to get ptr ring.
Signed-off-by: Prashant Bhole
---
drivers/net/tap.c | 13 -
drivers/net/tun.c | 13 -
drivers/vhost/net.c| 31
Next patches will introduce virtio_net XDP offloading. In that case
we need to manage offloaded and non-offload program. In order to make
it consistent this patch introduces use of XDP attachment helpers.
Signed-off-by: Prashant Bhole
---
drivers/net/virtio_net.c | 30
From: Jason Wang
Let's export do_xdp_generic as a general purpose function. It will
just run XDP program on skb but will not handle XDP actions.
Signed-off-by: Jason Wang
Signed-off-by: Prashant Bhole
---
include/linux/netdevice.h | 2 ++
net/core/dev.c| 6 +++---
2 files ch
Since we are offloading this program to the host, some of the helper
calls will not make sense. For example get_numa_node_id. Some helpers
can not be used because we don't handle them yet.
So let's allow a small set of helper calls for now.
Signed-off-by: Prashant Bhole
---
d
From: Jason Wang
__bpf_map_get is necessary to get verify whether an fd corresponds
to a bpf map, without adding a refcount on that map. After exporting
it can be used by a kernel module.
Signed-off-by: Jason Wang
Signed-off-by: Prashant Bhole
---
kernel/bpf/syscall.c | 1 +
1 file changed
When offloaded program returns XDP_TX, we need to inject the packet in
Rx path of tun. This patch injects such packets in Rx path using
tun_xdp_one.
Signed-off-by: Prashant Bhole
---
drivers/net/tun.c | 8 +++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/net/tun.c b
have map fds from the host side for each offloaded map when
program verification begins. map fds in the copy of the program are
replaced with map fds from host side. This copy of program is used
for offloading.
Signed-off-by: Jason Wang
Co-developed-by: Prashant Bhole
Signed-off-by: Prashant
by an ebpf program instructions. An array of bpf_insn is
prepared and passed to libbpf API bpf_load_program. The program fd is
retuned by the API is then attached to tap fd using TUNSETOFFLOADEDXDP
ioctl command.
Signed-off-by: Jason Wang
Co-developed-by: Prashant Bhole
Signed-off-by: Prashant
It handles the case when qemu performs read on tun using file
operations.
Signed-off-by: Prashant Bhole
---
drivers/net/tun.c | 11 +++
1 file changed, 11 insertions(+)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 084ca95358fe..639921c10e32 100644
--- a/drivers/net/tun.c
/value or key/key pair.
Map manipulation is done using libbpf APIs.
Signed-off-by: Jason Wang
Co-developed-by: Prashant Bhole
Signed-off-by: Prashant Bhole
---
hw/net/Makefile.objs| 2 +
hw/net/virtio-net.c | 88 +
include
.
Signed-off-by: Prashant Bhole
---
configure | 23 +++
1 file changed, 23 insertions(+)
diff --git a/configure b/configure
index 6099be1d84..a7e8a8450d 100755
--- a/configure
+++ b/configure
@@ -504,6 +504,7 @@ debug_mutex="no"
libpmem=""
default_device
tun_msg_ctl is used by vhost_net to communicate with tuntap. We will
introduce another type in soon. As a preparation this patch adds
conditions to check tun_msg_ctl type at necessary places.
Signed-off-by: Prashant Bhole
---
drivers/net/tap.c | 7 +--
drivers/net/tun.c | 6 +-
2 files
c ones are
working I'll move on to figuring out softmmu for more complex (read: real
world) binaries. Thanks for all the suggestions btw, really appreciate it.
On Wed, Jul 13, 2011 at 3:02 AM, Richard Henderson wrote:
> On 07/12/2011 01:58 PM, Prashant Vaibhav wrote:
> > Yes, ex
Yes, exactly what happened when loading a non-trivial binary. :-(
Oh well.
On Wed, Jul 13, 2011 at 12:04 AM, Richard Henderson wrote:
> On 07/12/2011 09:43 AM, Alexander Graf wrote:
> > For now, just force the mapping to somewhere mappable :)
>
> Unfortunately, I can tell you that there is no
large, causing a wraparound.
This way also the region bits won't be disregarded, but will make 8
contiguous regions giving a flat 64-bit space. I don't know which types of
programs make use of different regions simultaneously, will probably have to
think about it later, but for now this
ing ia64 binaries start at 0x4<<64 by convention. Also, the "hiaddr" is
read from elf header which again is set to 0x4<<64 + some value.
The existing code works fine with x86_64, for example, because the binaries
are typically starting at 0x4, which is easily mmap'd at first try.
Any ideas on a workaround?
~Prashant
what
target-i386/translate.c does. It's basically a warmup exercise for me so
that I fully understand the ISA (completely different from x86 which I am
more familiar with). I can then use it in my own target-ia64.
~Prashant
On Sat, Jun 25, 2011 at 5:28 PM, Andreas Färber wrote:
> H
Hello!
My name is Prashant Vaibhav and I am working this summer on a Google Summer
of Code project to implement software emulation of the Intel Itanium (IA64)
architecture. The project is being mentored by Alexander Graf. I am a
student studying at Jacobs University in Germany (staying in India
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