similar to: [PULL] vhost: more fixes for 3.10

MST, This is on top of [PATCH 0/2] vhost-net fix ubuf. Asias He (11): vhost: Remove vhost_enable_zcopy in vhost.h vhost: Move VHOST_NET_FEATURES to net.c vhost: Make vhost a separate module vhost: Remove comments for hdr in vhost.h vhost: Simplify dev->vqs[i] access vhost-net: Cleanup vhost_ubuf and vhost_zcopy vhost-scsi: Remove unnecessary forward struct vhost_scsi declaration

MST, This is on top of [PATCH 0/2] vhost-net fix ubuf. Asias He (11): vhost: Remove vhost_enable_zcopy in vhost.h vhost: Move VHOST_NET_FEATURES to net.c vhost: Make vhost a separate module vhost: Remove comments for hdr in vhost.h vhost: Simplify dev->vqs[i] access vhost-net: Cleanup vhost_ubuf and vhost_zcopy vhost-scsi: Remove unnecessary forward struct vhost_scsi declaration

Asias He (3): vhost: Remove vhost_enable_zcopy in vhost.h vhost: Move VHOST_NET_FEATURES to net.c vhost: Make vhost a separate module drivers/vhost/Kconfig | 8 ++++++++ drivers/vhost/Makefile | 3 ++- drivers/vhost/net.c | 6 ++++++ drivers/vhost/scsi.c | 1 - drivers/vhost/vhost.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++++- drivers/vhost/vhost.h | 8 ++------ 6

Asias He (3): vhost: Remove vhost_enable_zcopy in vhost.h vhost: Move VHOST_NET_FEATURES to net.c vhost: Make vhost a separate module drivers/vhost/Kconfig | 8 ++++++++ drivers/vhost/Makefile | 3 ++- drivers/vhost/net.c | 6 ++++++ drivers/vhost/scsi.c | 1 - drivers/vhost/vhost.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++++- drivers/vhost/vhost.h | 8 ++------ 6

Note: dropped some commits at the last moment, I did verify we get the same code in the end as what was in linux next for a while now. The following changes since commit 6995e2de6891c724bfeb2db33d7b87775f913ad1: Linux 6.4 (2023-06-25 16:29:58 -0700) are available in the Git repository at: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes

It was noticed that the copy_user() friends that was used to access virtqueue metdata tends to be very expensive for dataplane implementation like vhost since it involves lots of software checks, speculation barrier, hardware feature toggling (e.g SMAP). The extra cost will be more obvious when transferring small packets since the time spent on metadata accessing become significant.. This patch

Currently, vhost-net is the only consumer of vhost infrastructure. So vhost infrastructure and vhost-net driver are in a single module. Separating this as a vhost.ko module and a vhost-net.ko module makes it is easier to share code with other vhost drivers, e.g. vhost-blk.ko, tcm-vhost.ko. Signed-off-by: Asias He <asias at redhat.com> --- drivers/vhost/Kconfig | 10 +++++++++-

Currently, vhost-net is the only consumer of vhost infrastructure. So vhost infrastructure and vhost-net driver are in a single module. Separating this as a vhost.ko module and a vhost-net.ko module makes it is easier to share code with other vhost drivers, e.g. vhost-blk.ko, tcm-vhost.ko. Signed-off-by: Asias He <asias at redhat.com> --- drivers/vhost/Kconfig | 10 +++++++++-

virtio 1 and any layout are core features, move them there. This fixes vhost test. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- drivers/vhost/vhost.h | 4 +++- drivers/vhost/net.c | 3 +-- drivers/vhost/scsi.c | 4 +--- drivers/vhost/test.c | 3 +++ 4 files changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index

This commit introduces the EVENT_IDX support in packed ring. Signed-off-by: Tiwei Bie <tiwei.bie at intel.com> --- drivers/virtio/virtio_ring.c | 74 ++++++++++++++++++++++++++++++++---- 1 file changed, 67 insertions(+), 7 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 983ce5ffda1b..aefd7ac40928 100644 --- a/drivers/virtio/virtio_ring.c +++

The following changes since commit 8bb495e3f02401ee6f76d1b1d77f3ac9f079e376: Linux 3.10 (2013-06-30 15:13:29 -0700) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to 09a34c8404c1d4c5782de319c02e1d742c57875c: vhost/test: update test after vhost cleanups (2013-07-07 18:02:25 +0300)

The following changes since commit 8bb495e3f02401ee6f76d1b1d77f3ac9f079e376: Linux 3.10 (2013-06-30 15:13:29 -0700) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to 09a34c8404c1d4c5782de319c02e1d742c57875c: vhost/test: update test after vhost cleanups (2013-07-07 18:02:25 +0300)

The following changes since commit 09a34c8404c1d4c5782de319c02e1d742c57875c: vhost/test: update test after vhost cleanups (2013-07-07 18:02:25 +0300) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to 22fa90c7fb479694d6affebc049d21f06b714be6: vhost: Remove custom vhost rcu usage (2013-07-11

The following changes since commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd: Linux 5.1 (2019-05-05 17:42:58 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to 050f4c4d2fbbd8217d94dc21051cc597d2a6848b: virtio/s390: enable packed ring (2019-05-12 13:11:36 -0400)

The following changes since commit 5f9e832c137075045d15cd6899ab0505cfb2ca4b: Linus 5.3-rc1 (2019-07-21 14:05:38 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to 73f628ec9e6bcc45b77c53fe6d0c0ec55eaf82af: vhost: disable metadata prefetch optimization (2019-07-26 07:49:29 -0400)

Hope this can still make it. I was not sure about virtio-net change but it seems that it prevents livelocks for some people. The following changes since commit 089cf7f6ecb266b6a4164919a2e69bd2f938374a: Linux 5.3-rc7 (2019-09-02 09:57:40 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to

So I made a mess of it. Sent a pull before making sure it works on 32 bit too. Hope it's not too late to revert. Will teach me to be way more careful in the near future. The following changes since commit 060423bfdee3f8bc6e2c1bac97de24d5415e2bc4: vhost: make sure log_num < in_num (2019-09-11 15:15:26 -0400) are available in the Git repository at:

The following changes since commit da0c9ea146cbe92b832f1b0f694840ea8eb33cce: Linux 5.4-rc2 (2019-10-06 14:27:30 -0700) are available in the Git repository at: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to 245cdd9fbd396483d501db83047116e2530f245f: vhost/test: stop device before reset (2019-10-13 09:38:27 -0400)

Could not figure out whether I sent this pull request or not. Sorry about the noise if I did. The following changes since commit 7d194c2100ad2a6dded545887d02754948ca5241: Linux 5.4-rc4 (2019-10-20 15:56:22 -0400) are available in the Git repository at: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to

The following changes since commit af42d3466bdc8f39806b26f593604fdc54140bcb: Linux 5.4-rc8 (2019-11-17 14:47:30 -0800) are available in the Git repository at: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to c9a6820fc0da2603be3054ee7590eb9f350508a7: virtio_balloon: fix shrinker count (2019-11-20 02:15:57 -0500)