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* Mon Jul 31 2023 Miroslav Rezanina <mrezanin@redhat.com> - 8.0.0-10

Browse Source 
- kvm-util-iov-Make-qiov_slice-public.patch [bz#2174676]
- kvm-block-Collapse-padded-I-O-vecs-exceeding-IOV_MAX.patch [bz#2174676]
- kvm-util-iov-Remove-qemu_iovec_init_extended.patch [bz#2174676]
- kvm-iotests-iov-padding-New-test.patch [bz#2174676]
- kvm-block-Fix-pad_request-s-request-restriction.patch [bz#2174676]
- kvm-vdpa-do-not-block-migration-if-device-has-cvq-and-x-.patch [RHEL-573]
- kvm-virtio-net-correctly-report-maximum-tx_queue_size-va.patch [bz#2040509]
- kvm-hw-pci-Disable-PCI_ERR_UNCOR_MASK-reg-for-machine-ty.patch [bz#2223691]
- kvm-vhost-vdpa-mute-unaligned-memory-error-report.patch [bz#2141965]
- Resolves: bz#2174676
  (Guest hit EXT4-fs error on host 4K disk  when repeatedly hot-plug/unplug running IO disk [RHEL9])
- Resolves: RHEL-573
  ([mlx vhost_vdpa][rhel 9.3]live migration fail with "net vdpa cannot migrate with CVQ feature")
- Resolves: bz#2040509
  ([RFE]:Add support for changing "tx_queue_size" to a setable value)
- Resolves: bz#2223691
  ([machine type 9.2]Failed to migrate VM from RHEL 9.3 to RHEL 9.2)
- Resolves: bz#2141965
  ([TPM][vhost-vdpa][rhel9.2]Boot a guest with "vhost-vdpa + TPM emulator", qemu output: qemu-kvm: vhost_vdpa_listener_region_add received unaligned region)
This commit is contained in:
Miroslav Rezanina 2023-07-31 03:50:04 -04:00
parent 5e258fbe95
commit d10ea1f259
10 changed files with 1189 additions and 1 deletions
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354
kvm-block-Collapse-padded-I-O-vecs-exceeding-IOV_MAX.patch Normal file
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@ -0,0 +1,354 @@
From ff05c0b0d3414c0e5b3903048280accdc6c75ca0 Mon Sep 17 00:00:00 2001
From: Hanna Czenczek <hreitz@redhat.com>
Date: Tue, 11 Apr 2023 19:34:16 +0200
Subject: [PATCH 2/9] block: Collapse padded I/O vecs exceeding IOV_MAX
RH-Author: Hanna Czenczek <hreitz@redhat.com>
RH-MergeRequest: 189: block: Split padded I/O vectors exceeding IOV_MAX
RH-Bugzilla: 2174676
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [2/5] 84c56bd16f841a18cf2baa918dfeab3240e3944d (hreitz/qemu-kvm-c-9-s)
When processing vectored guest requests that are not aligned to the
storage request alignment, we pad them by adding head and/or tail
buffers for a read-modify-write cycle.
The guest can submit I/O vectors up to IOV_MAX (1024) in length, but
with this padding, the vector can exceed that limit. As of
4c002cef0e9abe7135d7916c51abce47f7fc1ee2 ("util/iov: make
qemu_iovec_init_extended() honest"), we refuse to pad vectors beyond the
limit, instead returning an error to the guest.
To the guest, this appears as a random I/O error. We should not return
an I/O error to the guest when it issued a perfectly valid request.
Before 4c002cef0e9abe7135d7916c51abce47f7fc1ee2, we just made the vector
longer than IOV_MAX, which generally seems to work (because the guest
assumes a smaller alignment than we really have, file-posix's
raw_co_prw() will generally see bdrv_qiov_is_aligned() return false, and
so emulate the request, so that the IOV_MAX does not matter). However,
that does not seem exactly great.
I see two ways to fix this problem:
1. We split such long requests into two requests.
2. We join some elements of the vector into new buffers to make it
shorter.
I am wary of (1), because it seems like it may have unintended side
effects.
(2) on the other hand seems relatively simple to implement, with
hopefully few side effects, so this patch does that.
To do this, the use of qemu_iovec_init_extended() in bdrv_pad_request()
is effectively replaced by the new function bdrv_create_padded_qiov(),
which not only wraps the request IOV with padding head/tail, but also
ensures that the resulting vector will not have more than IOV_MAX
elements. Putting that functionality into qemu_iovec_init_extended() is
infeasible because it requires allocating a bounce buffer; doing so
would require many more parameters (buffer alignment, how to initialize
the buffer, and out parameters like the buffer, its length, and the
original elements), which is not reasonable.
Conversely, it is not difficult to move qemu_iovec_init_extended()'s
functionality into bdrv_create_padded_qiov() by using public
qemu_iovec_* functions, so that is what this patch does.
Because bdrv_pad_request() was the only "serious" user of
qemu_iovec_init_extended(), the next patch will remove the latter
function, so the functionality is not implemented twice.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2141964
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230411173418.19549-3-hreitz@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
(cherry picked from commit 18743311b829cafc1737a5f20bc3248d5f91ee2a)
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
---
block/io.c | 166 ++++++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 151 insertions(+), 15 deletions(-)
diff --git a/block/io.c b/block/io.c
index 2e267a85ab..4e8e90208b 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1439,6 +1439,14 @@ out:
* @merge_reads is true for small requests,
* if @buf_len == @head + bytes + @tail. In this case it is possible that both
* head and tail exist but @buf_len == align and @tail_buf == @buf.
+ *
+ * @write is true for write requests, false for read requests.
+ *
+ * If padding makes the vector too long (exceeding IOV_MAX), then we need to
+ * merge existing vector elements into a single one. @collapse_bounce_buf acts
+ * as the bounce buffer in such cases. @pre_collapse_qiov has the pre-collapse
+ * I/O vector elements so for read requests, the data can be copied back after
+ * the read is done.
*/
typedef struct BdrvRequestPadding {
uint8_t *buf;
@@ -1447,11 +1455,17 @@ typedef struct BdrvRequestPadding {
size_t head;
size_t tail;
bool merge_reads;
+ bool write;
QEMUIOVector local_qiov;
+
+ uint8_t *collapse_bounce_buf;
+ size_t collapse_len;
+ QEMUIOVector pre_collapse_qiov;
} BdrvRequestPadding;
static bool bdrv_init_padding(BlockDriverState *bs,
int64_t offset, int64_t bytes,
+ bool write,
BdrvRequestPadding *pad)
{
int64_t align = bs->bl.request_alignment;
@@ -1483,6 +1497,8 @@ static bool bdrv_init_padding(BlockDriverState *bs,
pad->tail_buf = pad->buf + pad->buf_len - align;
}
+ pad->write = write;
+
return true;
}
@@ -1547,8 +1563,23 @@ zero_mem:
return 0;
}
-static void bdrv_padding_destroy(BdrvRequestPadding *pad)
+/**
+ * Free *pad's associated buffers, and perform any necessary finalization steps.
+ */
+static void bdrv_padding_finalize(BdrvRequestPadding *pad)
{
+ if (pad->collapse_bounce_buf) {
+ if (!pad->write) {
+ /*
+ * If padding required elements in the vector to be collapsed into a
+ * bounce buffer, copy the bounce buffer content back
+ */
+ qemu_iovec_from_buf(&pad->pre_collapse_qiov, 0,
+ pad->collapse_bounce_buf, pad->collapse_len);
+ }
+ qemu_vfree(pad->collapse_bounce_buf);
+ qemu_iovec_destroy(&pad->pre_collapse_qiov);
+ }
if (pad->buf) {
qemu_vfree(pad->buf);
qemu_iovec_destroy(&pad->local_qiov);
@@ -1556,6 +1587,101 @@ static void bdrv_padding_destroy(BdrvRequestPadding *pad)
memset(pad, 0, sizeof(*pad));
}
+/*
+ * Create pad->local_qiov by wrapping @iov in the padding head and tail, while
+ * ensuring that the resulting vector will not exceed IOV_MAX elements.
+ *
+ * To ensure this, when necessary, the first two or three elements of @iov are
+ * merged into pad->collapse_bounce_buf and replaced by a reference to that
+ * bounce buffer in pad->local_qiov.
+ *
+ * After performing a read request, the data from the bounce buffer must be
+ * copied back into pad->pre_collapse_qiov (e.g. by bdrv_padding_finalize()).
+ */
+static int bdrv_create_padded_qiov(BlockDriverState *bs,
+ BdrvRequestPadding *pad,
+ struct iovec *iov, int niov,
+ size_t iov_offset, size_t bytes)
+{
+ int padded_niov, surplus_count, collapse_count;
+
+ /* Assert this invariant */
+ assert(niov <= IOV_MAX);
+
+ /*
+ * Cannot pad if resulting length would exceed SIZE_MAX. Returning an error
+ * to the guest is not ideal, but there is little else we can do. At least
+ * this will practically never happen on 64-bit systems.
+ */
+ if (SIZE_MAX - pad->head < bytes ||
+ SIZE_MAX - pad->head - bytes < pad->tail)
+ {
+ return -EINVAL;
+ }
+
+ /* Length of the resulting IOV if we just concatenated everything */
+ padded_niov = !!pad->head + niov + !!pad->tail;
+
+ qemu_iovec_init(&pad->local_qiov, MIN(padded_niov, IOV_MAX));
+
+ if (pad->head) {
+ qemu_iovec_add(&pad->local_qiov, pad->buf, pad->head);
+ }
+
+ /*
+ * If padded_niov > IOV_MAX, we cannot just concatenate everything.
+ * Instead, merge the first two or three elements of @iov to reduce the
+ * number of vector elements as necessary.
+ */
+ if (padded_niov > IOV_MAX) {
+ /*
+ * Only head and tail can have lead to the number of entries exceeding
+ * IOV_MAX, so we can exceed it by the head and tail at most. We need
+ * to reduce the number of elements by `surplus_count`, so we merge that
+ * many elements plus one into one element.
+ */
+ surplus_count = padded_niov - IOV_MAX;
+ assert(surplus_count <= !!pad->head + !!pad->tail);
+ collapse_count = surplus_count + 1;
+
+ /*
+ * Move the elements to collapse into `pad->pre_collapse_qiov`, then
+ * advance `iov` (and associated variables) by those elements.
+ */
+ qemu_iovec_init(&pad->pre_collapse_qiov, collapse_count);
+ qemu_iovec_concat_iov(&pad->pre_collapse_qiov, iov,
+ collapse_count, iov_offset, SIZE_MAX);
+ iov += collapse_count;
+ iov_offset = 0;
+ niov -= collapse_count;
+ bytes -= pad->pre_collapse_qiov.size;
+
+ /*
+ * Construct the bounce buffer to match the length of the to-collapse
+ * vector elements, and for write requests, initialize it with the data
+ * from those elements. Then add it to `pad->local_qiov`.
+ */
+ pad->collapse_len = pad->pre_collapse_qiov.size;
+ pad->collapse_bounce_buf = qemu_blockalign(bs, pad->collapse_len);
+ if (pad->write) {
+ qemu_iovec_to_buf(&pad->pre_collapse_qiov, 0,
+ pad->collapse_bounce_buf, pad->collapse_len);
+ }
+ qemu_iovec_add(&pad->local_qiov,
+ pad->collapse_bounce_buf, pad->collapse_len);
+ }
+
+ qemu_iovec_concat_iov(&pad->local_qiov, iov, niov, iov_offset, bytes);
+
+ if (pad->tail) {
+ qemu_iovec_add(&pad->local_qiov,
+ pad->buf + pad->buf_len - pad->tail, pad->tail);
+ }
+
+ assert(pad->local_qiov.niov == MIN(padded_niov, IOV_MAX));
+ return 0;
+}
+
/*
* bdrv_pad_request
*
@@ -1563,6 +1689,8 @@ static void bdrv_padding_destroy(BdrvRequestPadding *pad)
* read of padding, bdrv_padding_rmw_read() should be called separately if
* needed.
*
+ * @write is true for write requests, false for read requests.
+ *
* Request parameters (@qiov, &qiov_offset, &offset, &bytes) are in-out:
* - on function start they represent original request
* - on failure or when padding is not needed they are unchanged
@@ -1571,26 +1699,34 @@ static void bdrv_padding_destroy(BdrvRequestPadding *pad)
static int bdrv_pad_request(BlockDriverState *bs,
QEMUIOVector **qiov, size_t *qiov_offset,
int64_t *offset, int64_t *bytes,
+ bool write,
BdrvRequestPadding *pad, bool *padded,
BdrvRequestFlags *flags)
{
int ret;
+ struct iovec *sliced_iov;
+ int sliced_niov;
+ size_t sliced_head, sliced_tail;
bdrv_check_qiov_request(*offset, *bytes, *qiov, *qiov_offset, &error_abort);
- if (!bdrv_init_padding(bs, *offset, *bytes, pad)) {
+ if (!bdrv_init_padding(bs, *offset, *bytes, write, pad)) {
if (padded) {
*padded = false;
}
return 0;
}
- ret = qemu_iovec_init_extended(&pad->local_qiov, pad->buf, pad->head,
- *qiov, *qiov_offset, *bytes,
- pad->buf + pad->buf_len - pad->tail,
- pad->tail);
+ sliced_iov = qemu_iovec_slice(*qiov, *qiov_offset, *bytes,
+ &sliced_head, &sliced_tail,
+ &sliced_niov);
+
+ /* Guaranteed by bdrv_check_qiov_request() */
+ assert(*bytes <= SIZE_MAX);
+ ret = bdrv_create_padded_qiov(bs, pad, sliced_iov, sliced_niov,
+ sliced_head, *bytes);
if (ret < 0) {
- bdrv_padding_destroy(pad);
+ bdrv_padding_finalize(pad);
return ret;
}
*bytes += pad->head + pad->tail;
@@ -1657,8 +1793,8 @@ int coroutine_fn bdrv_co_preadv_part(BdrvChild *child,
flags |= BDRV_REQ_COPY_ON_READ;
}
- ret = bdrv_pad_request(bs, &qiov, &qiov_offset, &offset, &bytes, &pad,
- NULL, &flags);
+ ret = bdrv_pad_request(bs, &qiov, &qiov_offset, &offset, &bytes, false,
+ &pad, NULL, &flags);
if (ret < 0) {
goto fail;
}
@@ -1668,7 +1804,7 @@ int coroutine_fn bdrv_co_preadv_part(BdrvChild *child,
bs->bl.request_alignment,
qiov, qiov_offset, flags);
tracked_request_end(&req);
- bdrv_padding_destroy(&pad);
+ bdrv_padding_finalize(&pad);
fail:
bdrv_dec_in_flight(bs);
@@ -2000,7 +2136,7 @@ bdrv_co_do_zero_pwritev(BdrvChild *child, int64_t offset, int64_t bytes,
/* This flag doesn't make sense for padding or zero writes */
flags &= ~BDRV_REQ_REGISTERED_BUF;
- padding = bdrv_init_padding(bs, offset, bytes, &pad);
+ padding = bdrv_init_padding(bs, offset, bytes, true, &pad);
if (padding) {
assert(!(flags & BDRV_REQ_NO_WAIT));
bdrv_make_request_serialising(req, align);
@@ -2048,7 +2184,7 @@ bdrv_co_do_zero_pwritev(BdrvChild *child, int64_t offset, int64_t bytes,
}
out:
- bdrv_padding_destroy(&pad);
+ bdrv_padding_finalize(&pad);
return ret;
}
@@ -2116,8 +2252,8 @@ int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child,
* bdrv_co_do_zero_pwritev() does aligning by itself, so, we do
* alignment only if there is no ZERO flag.
*/
- ret = bdrv_pad_request(bs, &qiov, &qiov_offset, &offset, &bytes, &pad,
- &padded, &flags);
+ ret = bdrv_pad_request(bs, &qiov, &qiov_offset, &offset, &bytes, true,
+ &pad, &padded, &flags);
if (ret < 0) {
return ret;
}
@@ -2147,7 +2283,7 @@ int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child,
ret = bdrv_aligned_pwritev(child, &req, offset, bytes, align,
qiov, qiov_offset, flags);
- bdrv_padding_destroy(&pad);
+ bdrv_padding_finalize(&pad);
out:
tracked_request_end(&req);
--
2.39.3

73
kvm-block-Fix-pad_request-s-request-restriction.patch Normal file
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@ -0,0 +1,73 @@
From 547f6bf93734f7c13675eebb93273ef2273f7c31 Mon Sep 17 00:00:00 2001
From: Hanna Czenczek <hreitz@redhat.com>
Date: Fri, 14 Jul 2023 10:59:38 +0200
Subject: [PATCH 5/9] block: Fix pad_request's request restriction
RH-Author: Hanna Czenczek <hreitz@redhat.com>
RH-MergeRequest: 189: block: Split padded I/O vectors exceeding IOV_MAX
RH-Bugzilla: 2174676
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [5/5] e8abc0485f6e0608a1ec55143ff40a14d273dfc8 (hreitz/qemu-kvm-c-9-s)
bdrv_pad_request() relies on requests' lengths not to exceed SIZE_MAX,
which bdrv_check_qiov_request() does not guarantee.
bdrv_check_request32() however will guarantee this, and both of
bdrv_pad_request()'s callers (bdrv_co_preadv_part() and
bdrv_co_pwritev_part()) already run it before calling
bdrv_pad_request(). Therefore, bdrv_pad_request() can safely call
bdrv_check_request32() without expecting error, too.
In effect, this patch will not change guest-visible behavior. It is a
clean-up to tighten a condition to match what is guaranteed by our
callers, and which exists purely to show clearly why the subsequent
assertion (`assert(*bytes <= SIZE_MAX)`) is always true.
Note there is a difference between the interfaces of
bdrv_check_qiov_request() and bdrv_check_request32(): The former takes
an errp, the latter does not, so we can no longer just pass
&error_abort. Instead, we need to check the returned value. While we
do expect success (because the callers have already run this function),
an assert(ret == 0) is not much simpler than just to return an error if
it occurs, so let us handle errors by returning them up the stack now.
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-id: 20230714085938.202730-1-hreitz@redhat.com
Fixes: 18743311b829cafc1737a5f20bc3248d5f91ee2a
("block: Collapse padded I/O vecs exceeding IOV_MAX")
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/io.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/block/io.c b/block/io.c
index 4e8e90208b..807c9fb720 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1708,7 +1708,11 @@ static int bdrv_pad_request(BlockDriverState *bs,
int sliced_niov;
size_t sliced_head, sliced_tail;
- bdrv_check_qiov_request(*offset, *bytes, *qiov, *qiov_offset, &error_abort);
+ /* Should have been checked by the caller already */
+ ret = bdrv_check_request32(*offset, *bytes, *qiov, *qiov_offset);
+ if (ret < 0) {
+ return ret;
+ }
if (!bdrv_init_padding(bs, *offset, *bytes, write, pad)) {
if (padded) {
@@ -1721,7 +1725,7 @@ static int bdrv_pad_request(BlockDriverState *bs,
&sliced_head, &sliced_tail,
&sliced_niov);
- /* Guaranteed by bdrv_check_qiov_request() */
+ /* Guaranteed by bdrv_check_request32() */
assert(*bytes <= SIZE_MAX);
ret = bdrv_create_padded_qiov(bs, pad, sliced_iov, sliced_niov,
sliced_head, *bytes);
--
2.39.3

44
kvm-hw-pci-Disable-PCI_ERR_UNCOR_MASK-reg-for-machine-ty.patch Normal file
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@ -0,0 +1,44 @@
From 491cf9e251026d135f315b7fe0d8771841f06e9f Mon Sep 17 00:00:00 2001
From: Leonardo Bras <leobras@redhat.com>
Date: Tue, 25 Jul 2023 15:34:45 -0300
Subject: [PATCH 8/9] hw/pci: Disable PCI_ERR_UNCOR_MASK reg for machine type
<= pc-q35-rhel9.2.0
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Leonardo Brás <leobras@redhat.com>
RH-MergeRequest: 192: hw/pci: Disable PCI_ERR_UNCOR_MASK reg for machine type <= pc-q35-rhel9.2.0
RH-Bugzilla: 2223691
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: quintela1 <quintela@redhat.com>
RH-Commit: [1/1] e57816f8ad15a9ce5f342b061c103ae011ec1223 (LeoBras/centos-qemu-kvm)
This is a downstream-only patch to that sets off the property
x-pcie-err-unc-mask for machine types <= pc-q35-rhel9.2.0, allowing
live migrations to RHEL9.2 happen successfully.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2223691
Fixes: 293a34b4be ("hw/pci: Disable PCI_ERR_UNCOR_MASK register for machine
type < 8.0")
Signed-off-by: Leonardo Bras <leobras@redhat.com>
---
hw/core/machine.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 5ea52317b9..6f5117669d 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -62,6 +62,8 @@ GlobalProperty hw_compat_rhel_9_2[] = {
{ "virtio-mem", "x-early-migration", "false" },
/* hw_compat_rhel_9_2 from hw_compat_7_2 */
{ "migration", "x-preempt-pre-7-2", "true" },
+ /* hw_compat_rhel_9_2 from hw_compat_7_2 */
+ { TYPE_PCI_DEVICE, "x-pcie-err-unc-mask", "off" },
};
const size_t hw_compat_rhel_9_2_len = G_N_ELEMENTS(hw_compat_rhel_9_2);
--
2.39.3

186
kvm-iotests-iov-padding-New-test.patch Normal file
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@ -0,0 +1,186 @@
From add833b5de202d6765dda56c8773985fbe7f40a6 Mon Sep 17 00:00:00 2001
From: Hanna Czenczek <hreitz@redhat.com>
Date: Tue, 11 Apr 2023 19:34:18 +0200
Subject: [PATCH 4/9] iotests/iov-padding: New test
RH-Author: Hanna Czenczek <hreitz@redhat.com>
RH-MergeRequest: 189: block: Split padded I/O vectors exceeding IOV_MAX
RH-Bugzilla: 2174676
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [4/5] b32715b5c2a3e2add39c5ed6e8f71df56e0b91a0 (hreitz/qemu-kvm-c-9-s)
Test that even vectored IO requests with 1024 vector elements that are
not aligned to the device's request alignment will succeed.
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230411173418.19549-5-hreitz@redhat.com>
(cherry picked from commit d7e1905e3f54ff9512db4c7a946a8603b62b108d)
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
---
tests/qemu-iotests/tests/iov-padding | 85 ++++++++++++++++++++++++
tests/qemu-iotests/tests/iov-padding.out | 59 ++++++++++++++++
2 files changed, 144 insertions(+)
create mode 100755 tests/qemu-iotests/tests/iov-padding
create mode 100644 tests/qemu-iotests/tests/iov-padding.out
diff --git a/tests/qemu-iotests/tests/iov-padding b/tests/qemu-iotests/tests/iov-padding
new file mode 100755
index 0000000000..b9604900c7
--- /dev/null
+++ b/tests/qemu-iotests/tests/iov-padding
@@ -0,0 +1,85 @@
+#!/usr/bin/env bash
+# group: rw quick
+#
+# Check the interaction of request padding (to fit alignment restrictions) with
+# vectored I/O from the guest
+#
+# Copyright Red Hat
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+seq=$(basename $0)
+echo "QA output created by $seq"
+
+status=1 # failure is the default!
+
+_cleanup()
+{
+ _cleanup_test_img
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+cd ..
+. ./common.rc
+. ./common.filter
+
+_supported_fmt raw
+_supported_proto file
+
+_make_test_img 1M
+
+IMGSPEC="driver=blkdebug,align=4096,image.driver=file,image.filename=$TEST_IMG"
+
+# Four combinations:
+# - Offset 4096, length 1023 * 512 + 512: Fully aligned to 4k
+# - Offset 4096, length 1023 * 512 + 4096: Head is aligned, tail is not
+# - Offset 512, length 1023 * 512 + 512: Neither head nor tail are aligned
+# - Offset 512, length 1023 * 512 + 4096: Tail is aligned, head is not
+for start_offset in 4096 512; do
+ for last_element_length in 512 4096; do
+ length=$((1023 * 512 + $last_element_length))
+
+ echo
+ echo "== performing 1024-element vectored requests to image (offset: $start_offset; length: $length) =="
+
+ # Fill with data for testing
+ $QEMU_IO -c 'write -P 1 0 1M' "$TEST_IMG" | _filter_qemu_io
+
+ # 1023 512-byte buffers, and then one with length $last_element_length
+ cmd_params="-P 2 $start_offset $(yes 512 | head -n 1023 | tr '\n' ' ') $last_element_length"
+ QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS_NO_FMT" $QEMU_IO \
+ -c "writev $cmd_params" \
+ --image-opts \
+ "$IMGSPEC" \
+ | _filter_qemu_io
+
+ # Read all patterns -- read the part we just wrote with writev twice,
+ # once "normally", and once with a readv, so we see that that works, too
+ QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS_NO_FMT" $QEMU_IO \
+ -c "read -P 1 0 $start_offset" \
+ -c "read -P 2 $start_offset $length" \
+ -c "readv $cmd_params" \
+ -c "read -P 1 $((start_offset + length)) $((1024 * 1024 - length - start_offset))" \
+ --image-opts \
+ "$IMGSPEC" \
+ | _filter_qemu_io
+ done
+done
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
diff --git a/tests/qemu-iotests/tests/iov-padding.out b/tests/qemu-iotests/tests/iov-padding.out
new file mode 100644
index 0000000000..e07a91fac7
--- /dev/null
+++ b/tests/qemu-iotests/tests/iov-padding.out
@@ -0,0 +1,59 @@
+QA output created by iov-padding
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
+
+== performing 1024-element vectored requests to image (offset: 4096; length: 524288) ==
+wrote 1048576/1048576 bytes at offset 0
+1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 524288/524288 bytes at offset 4096
+512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 4096/4096 bytes at offset 0
+4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 524288/524288 bytes at offset 4096
+512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 524288/524288 bytes at offset 4096
+512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 520192/520192 bytes at offset 528384
+508 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+== performing 1024-element vectored requests to image (offset: 4096; length: 527872) ==
+wrote 1048576/1048576 bytes at offset 0
+1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 527872/527872 bytes at offset 4096
+515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 4096/4096 bytes at offset 0
+4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 527872/527872 bytes at offset 4096
+515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 527872/527872 bytes at offset 4096
+515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 516608/516608 bytes at offset 531968
+504.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+== performing 1024-element vectored requests to image (offset: 512; length: 524288) ==
+wrote 1048576/1048576 bytes at offset 0
+1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 524288/524288 bytes at offset 512
+512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 524288/524288 bytes at offset 512
+512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 524288/524288 bytes at offset 512
+512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 523776/523776 bytes at offset 524800
+511.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+== performing 1024-element vectored requests to image (offset: 512; length: 527872) ==
+wrote 1048576/1048576 bytes at offset 0
+1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 527872/527872 bytes at offset 512
+515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 527872/527872 bytes at offset 512
+515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 527872/527872 bytes at offset 512
+515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 520192/520192 bytes at offset 528384
+508 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+*** done
--
2.39.3

97
kvm-util-iov-Make-qiov_slice-public.patch Normal file
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@ -0,0 +1,97 @@
From 64652225695c23855cfb1252cea2b55c24da2260 Mon Sep 17 00:00:00 2001
From: Hanna Czenczek <hreitz@redhat.com>
Date: Tue, 11 Apr 2023 19:34:15 +0200
Subject: [PATCH 1/9] util/iov: Make qiov_slice() public
RH-Author: Hanna Czenczek <hreitz@redhat.com>
RH-MergeRequest: 189: block: Split padded I/O vectors exceeding IOV_MAX
RH-Bugzilla: 2174676
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [1/5] 9c3cd661f7139ce124ee4f4d5fcbeaf3dbb9c45c (hreitz/qemu-kvm-c-9-s)
We want to inline qemu_iovec_init_extended() in block/io.c for padding
requests, and having access to qiov_slice() is useful for this. As a
public function, it is renamed to qemu_iovec_slice().
(We will need to count the number of I/O vector elements of a slice
there, and then later process this slice. Without qiov_slice(), we
would need to call qemu_iovec_subvec_niov(), and all further
IOV-processing functions may need to skip prefixing elements to
accomodate for a qiov_offset. Because qemu_iovec_subvec_niov()
internally calls qiov_slice(), we can just have the block/io.c code call
qiov_slice() itself, thus get the number of elements, and also create an
iovec array with the superfluous prefixing elements stripped, so the
following processing functions no longer need to skip them.)
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230411173418.19549-2-hreitz@redhat.com>
(cherry picked from commit 3d06cea8256d54a6b0238934c31012f7f17100f5)
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
---
include/qemu/iov.h | 3 +++
util/iov.c | 14 +++++++-------
2 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/include/qemu/iov.h b/include/qemu/iov.h
index 9330746680..46fadfb27a 100644
--- a/include/qemu/iov.h
+++ b/include/qemu/iov.h
@@ -229,6 +229,9 @@ int qemu_iovec_init_extended(
void *tail_buf, size_t tail_len);
void qemu_iovec_init_slice(QEMUIOVector *qiov, QEMUIOVector *source,
size_t offset, size_t len);
+struct iovec *qemu_iovec_slice(QEMUIOVector *qiov,
+ size_t offset, size_t len,
+ size_t *head, size_t *tail, int *niov);
int qemu_iovec_subvec_niov(QEMUIOVector *qiov, size_t offset, size_t len);
void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
void qemu_iovec_concat(QEMUIOVector *dst,
diff --git a/util/iov.c b/util/iov.c
index b4be580022..65a70449da 100644
--- a/util/iov.c
+++ b/util/iov.c
@@ -378,15 +378,15 @@ static struct iovec *iov_skip_offset(struct iovec *iov, size_t offset,
}
/*
- * qiov_slice
+ * qemu_iovec_slice
*
* Find subarray of iovec's, containing requested range. @head would
* be offset in first iov (returned by the function), @tail would be
* count of extra bytes in last iovec (returned iov + @niov - 1).
*/
-static struct iovec *qiov_slice(QEMUIOVector *qiov,
- size_t offset, size_t len,
- size_t *head, size_t *tail, int *niov)
+struct iovec *qemu_iovec_slice(QEMUIOVector *qiov,
+ size_t offset, size_t len,
+ size_t *head, size_t *tail, int *niov)
{
struct iovec *iov, *end_iov;
@@ -411,7 +411,7 @@ int qemu_iovec_subvec_niov(QEMUIOVector *qiov, size_t offset, size_t len)
size_t head, tail;
int niov;
- qiov_slice(qiov, offset, len, &head, &tail, &niov);
+ qemu_iovec_slice(qiov, offset, len, &head, &tail, &niov);
return niov;
}
@@ -439,8 +439,8 @@ int qemu_iovec_init_extended(
}
if (mid_len) {
- mid_iov = qiov_slice(mid_qiov, mid_offset, mid_len,
- &mid_head, &mid_tail, &mid_niov);
+ mid_iov = qemu_iovec_slice(mid_qiov, mid_offset, mid_len,
+ &mid_head, &mid_tail, &mid_niov);
}
total_niov = !!head_len + mid_niov + !!tail_len;
--
2.39.3

156
kvm-util-iov-Remove-qemu_iovec_init_extended.patch Normal file
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@ -0,0 +1,156 @@
From 8ff973985a04fec1a3cdf886976a03e0dca7b0ea Mon Sep 17 00:00:00 2001
From: Hanna Czenczek <hreitz@redhat.com>
Date: Tue, 11 Apr 2023 19:34:17 +0200
Subject: [PATCH 3/9] util/iov: Remove qemu_iovec_init_extended()
RH-Author: Hanna Czenczek <hreitz@redhat.com>
RH-MergeRequest: 189: block: Split padded I/O vectors exceeding IOV_MAX
RH-Bugzilla: 2174676
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [3/5] 1740d7b15ea4fbfbe71e7adc122741e85e83fb8c (hreitz/qemu-kvm-c-9-s)
bdrv_pad_request() was the main user of qemu_iovec_init_extended().
HEAD^ has removed that use, so we can remove qemu_iovec_init_extended()
now.
The only remaining user is qemu_iovec_init_slice(), which can easily
inline the small part it really needs.
Note that qemu_iovec_init_extended() offered a memcpy() optimization to
initialize the new I/O vector. qemu_iovec_concat_iov(), which is used
to replace its functionality, does not, but calls qemu_iovec_add() for
every single element. If we decide this optimization was important, we
will need to re-implement it in qemu_iovec_concat_iov(), which might
also benefit its pre-existing users.
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230411173418.19549-4-hreitz@redhat.com>
(cherry picked from commit cc63f6f6fa1aaa4b6405dd69432c693e9c8d18ca)
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
---
include/qemu/iov.h | 5 ---
util/iov.c | 79 +++++++---------------------------------------
2 files changed, 11 insertions(+), 73 deletions(-)
diff --git a/include/qemu/iov.h b/include/qemu/iov.h
index 46fadfb27a..63a1c01965 100644
--- a/include/qemu/iov.h
+++ b/include/qemu/iov.h
@@ -222,11 +222,6 @@ static inline void *qemu_iovec_buf(QEMUIOVector *qiov)
void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint);
void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov);
-int qemu_iovec_init_extended(
- QEMUIOVector *qiov,
- void *head_buf, size_t head_len,
- QEMUIOVector *mid_qiov, size_t mid_offset, size_t mid_len,
- void *tail_buf, size_t tail_len);
void qemu_iovec_init_slice(QEMUIOVector *qiov, QEMUIOVector *source,
size_t offset, size_t len);
struct iovec *qemu_iovec_slice(QEMUIOVector *qiov,
diff --git a/util/iov.c b/util/iov.c
index 65a70449da..866fb577f3 100644
--- a/util/iov.c
+++ b/util/iov.c
@@ -416,70 +416,6 @@ int qemu_iovec_subvec_niov(QEMUIOVector *qiov, size_t offset, size_t len)
return niov;
}
-/*
- * Compile new iovec, combining @head_buf buffer, sub-qiov of @mid_qiov,
- * and @tail_buf buffer into new qiov.
- */
-int qemu_iovec_init_extended(
- QEMUIOVector *qiov,
- void *head_buf, size_t head_len,
- QEMUIOVector *mid_qiov, size_t mid_offset, size_t mid_len,
- void *tail_buf, size_t tail_len)
-{
- size_t mid_head, mid_tail;
- int total_niov, mid_niov = 0;
- struct iovec *p, *mid_iov = NULL;
-
- assert(mid_qiov->niov <= IOV_MAX);
-
- if (SIZE_MAX - head_len < mid_len ||
- SIZE_MAX - head_len - mid_len < tail_len)
- {
- return -EINVAL;
- }
-
- if (mid_len) {
- mid_iov = qemu_iovec_slice(mid_qiov, mid_offset, mid_len,
- &mid_head, &mid_tail, &mid_niov);
- }
-
- total_niov = !!head_len + mid_niov + !!tail_len;
- if (total_niov > IOV_MAX) {
- return -EINVAL;
- }
-
- if (total_niov == 1) {
- qemu_iovec_init_buf(qiov, NULL, 0);
- p = &qiov->local_iov;
- } else {
- qiov->niov = qiov->nalloc = total_niov;
- qiov->size = head_len + mid_len + tail_len;
- p = qiov->iov = g_new(struct iovec, qiov->niov);
- }
-
- if (head_len) {
- p->iov_base = head_buf;
- p->iov_len = head_len;
- p++;
- }
-
- assert(!mid_niov == !mid_len);
- if (mid_niov) {
- memcpy(p, mid_iov, mid_niov * sizeof(*p));
- p[0].iov_base = (uint8_t *)p[0].iov_base + mid_head;
- p[0].iov_len -= mid_head;
- p[mid_niov - 1].iov_len -= mid_tail;
- p += mid_niov;
- }
-
- if (tail_len) {
- p->iov_base = tail_buf;
- p->iov_len = tail_len;
- }
-
- return 0;
-}
-
/*
* Check if the contents of subrange of qiov data is all zeroes.
*/
@@ -511,14 +447,21 @@ bool qemu_iovec_is_zero(QEMUIOVector *qiov, size_t offset, size_t bytes)
void qemu_iovec_init_slice(QEMUIOVector *qiov, QEMUIOVector *source,
size_t offset, size_t len)
{
- int ret;
+ struct iovec *slice_iov;
+ int slice_niov;
+ size_t slice_head, slice_tail;
assert(source->size >= len);
assert(source->size - len >= offset);
- /* We shrink the request, so we can't overflow neither size_t nor MAX_IOV */
- ret = qemu_iovec_init_extended(qiov, NULL, 0, source, offset, len, NULL, 0);
- assert(ret == 0);
+ slice_iov = qemu_iovec_slice(source, offset, len,
+ &slice_head, &slice_tail, &slice_niov);
+ if (slice_niov == 1) {
+ qemu_iovec_init_buf(qiov, slice_iov[0].iov_base + slice_head, len);
+ } else {
+ qemu_iovec_init(qiov, slice_niov);
+ qemu_iovec_concat_iov(qiov, slice_iov, slice_niov, slice_head, len);
+ }
}
void qemu_iovec_destroy(QEMUIOVector *qiov)
--
2.39.3

61
kvm-vdpa-do-not-block-migration-if-device-has-cvq-and-x-.patch Normal file
View File

@ -0,0 +1,61 @@
From 74c2f378bdf278a03c02ae48948b00b4431a3fd6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
Date: Fri, 2 Jun 2023 16:38:52 +0200
Subject: [PATCH 6/9] vdpa: do not block migration if device has cvq and
x-svq=on
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Eugenio Pérez <eperezma@redhat.com>
RH-MergeRequest: 190: vdpa: do not block migration if device has cvq and x-svq=on
RH-Jira: RHEL-573
RH-Acked-by: Jason Wang <jasowang@redhat.com>
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
RH-Commit: [1/1] b0e2ec3c9e5c17252cf6a043fe1374ddc3c37de7 (eperezmartin/qemu-kvm)
It was a mistake to forbid in all cases, as SVQ is already able to send
all the CVQ messages before start forwarding data vqs. It actually
caused a regression, making impossible to migrate device previously
migratable.
Fixes: 36e4647247f2 ("vdpa: add vhost_vdpa_net_valid_svq_features")
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230602143854.1879091-2-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
(cherry picked from commit 8bc0049eadafb984d305c847cedff550b58e5fc0)
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
net/vhost-vdpa.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 8c8900f0f4..1ae839da34 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -844,13 +844,16 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
s->vhost_vdpa.shadow_vq_ops_opaque = s;
/*
- * TODO: We cannot migrate devices with CVQ as there is no way to set
- * the device state (MAC, MQ, etc) before starting the datapath.
+ * TODO: We cannot migrate devices with CVQ and no x-svq enabled as
+ * there is no way to set the device state (MAC, MQ, etc) before
+ * starting the datapath.
*
* Migration blocker ownership now belongs to s->vhost_vdpa.
*/
- error_setg(&s->vhost_vdpa.migration_blocker,
- "net vdpa cannot migrate with CVQ feature");
+ if (!svq) {
+ error_setg(&s->vhost_vdpa.migration_blocker,
+ "net vdpa cannot migrate with CVQ feature");
+ }
}
ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs);
if (ret) {
--
2.39.3

86
kvm-vhost-vdpa-mute-unaligned-memory-error-report.patch Normal file
View File

@ -0,0 +1,86 @@
From 3b51a7b84ea21360c6d551284aecb8b6f371e888 Mon Sep 17 00:00:00 2001
From: Laurent Vivier <lvivier@redhat.com>
Date: Tue, 4 Jul 2023 09:19:31 +0200
Subject: [PATCH 9/9] vhost-vdpa: mute unaligned memory error report
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Laurent Vivier <lvivier@redhat.com>
RH-MergeRequest: 193: vhost-vdpa: mute unaligned memory error report
RH-Bugzilla: 2141965
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Eugenio Pérez <eperezma@redhat.com>
RH-Commit: [1/1] 60f5385d41269ce9310e1e8e0a2f1106e3a16ada (lvivier/qemu-kvm-centos)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2141965
With TPM CRM device, vhost-vdpa reports an error when it tries
to register a listener for a non aligned memory region:
qemu-system-x86_64: vhost_vdpa_listener_region_add received unaligned region
qemu-system-x86_64: vhost_vdpa_listener_region_del received unaligned region
This error can be confusing for the user whereas we only need to skip
the region (as it's already done after the error_report())
Rather than introducing a special case for TPM CRB memory section
to not display the message in this case, simply replace the
error_report() by a trace function (with more information, like the
memory region name).
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20230704071931.575888-2-lvivier@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 77812aa7b1fdf8f547c35a7f9a4eb1cbf3a073db)
---
hw/virtio/trace-events | 2 ++
hw/virtio/vhost-vdpa.c | 8 ++++++--
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index 68b752e304..300dec8d3e 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -34,7 +34,9 @@ vhost_vdpa_dma_map(void *vdpa, int fd, uint32_t msg_type, uint32_t asid, uint64_
vhost_vdpa_dma_unmap(void *vdpa, int fd, uint32_t msg_type, uint32_t asid, uint64_t iova, uint64_t size, uint8_t type) "vdpa:%p fd: %d msg_type: %"PRIu32" asid: %"PRIu32" iova: 0x%"PRIx64" size: 0x%"PRIx64" type: %"PRIu8
vhost_vdpa_listener_begin_batch(void *v, int fd, uint32_t msg_type, uint8_t type) "vdpa:%p fd: %d msg_type: %"PRIu32" type: %"PRIu8
vhost_vdpa_listener_commit(void *v, int fd, uint32_t msg_type, uint8_t type) "vdpa:%p fd: %d msg_type: %"PRIu32" type: %"PRIu8
+vhost_vdpa_listener_region_add_unaligned(void *v, const char *name, uint64_t offset_as, uint64_t offset_page) "vdpa: %p region %s offset_within_address_space %"PRIu64" offset_within_region %"PRIu64
vhost_vdpa_listener_region_add(void *vdpa, uint64_t iova, uint64_t llend, void *vaddr, bool readonly) "vdpa: %p iova 0x%"PRIx64" llend 0x%"PRIx64" vaddr: %p read-only: %d"
+vhost_vdpa_listener_region_del_unaligned(void *v, const char *name, uint64_t offset_as, uint64_t offset_page) "vdpa: %p region %s offset_within_address_space %"PRIu64" offset_within_region %"PRIu64
vhost_vdpa_listener_region_del(void *vdpa, uint64_t iova, uint64_t llend) "vdpa: %p iova 0x%"PRIx64" llend 0x%"PRIx64
vhost_vdpa_add_status(void *dev, uint8_t status) "dev: %p status: 0x%"PRIx8
vhost_vdpa_init(void *dev, void *vdpa) "dev: %p vdpa: %p"
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index bc6bad23d5..c04f14420d 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -202,7 +202,9 @@ static void vhost_vdpa_listener_region_add(MemoryListener *listener,
if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
(section->offset_within_region & ~TARGET_PAGE_MASK))) {
- error_report("%s received unaligned region", __func__);
+ trace_vhost_vdpa_listener_region_add_unaligned(v, section->mr->name,
+ section->offset_within_address_space & ~TARGET_PAGE_MASK,
+ section->offset_within_region & ~TARGET_PAGE_MASK);
return;
}
@@ -281,7 +283,9 @@ static void vhost_vdpa_listener_region_del(MemoryListener *listener,
if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
(section->offset_within_region & ~TARGET_PAGE_MASK))) {
- error_report("%s received unaligned region", __func__);
+ trace_vhost_vdpa_listener_region_del_unaligned(v, section->mr->name,
+ section->offset_within_address_space & ~TARGET_PAGE_MASK,
+ section->offset_within_region & ~TARGET_PAGE_MASK);
return;
}
--
2.39.3

92
kvm-virtio-net-correctly-report-maximum-tx_queue_size-va.patch Normal file
View File

@ -0,0 +1,92 @@
From 4fe096a6fad61ab721fd29324d48383c7f427ac9 Mon Sep 17 00:00:00 2001
From: Laurent Vivier <lvivier@redhat.com>
Date: Mon, 5 Jun 2023 16:21:25 +0200
Subject: [PATCH 7/9] virtio-net: correctly report maximum tx_queue_size value
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Laurent Vivier <lvivier@redhat.com>
RH-MergeRequest: 191: virtio-net: correctly report maximum tx_queue_size value
RH-Bugzilla: 2040509
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Eugenio Pérez <eperezma@redhat.com>
RH-Commit: [1/1] afb944c6d75fe476ac86fe267b1cca5f272dfbbd (lvivier/qemu-kvm-centos)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2040509
Maximum value for tx_queue_size depends on the backend type.
1024 for vDPA/vhost-user, 256 for all the others.
The value is returned by virtio_net_max_tx_queue_size() to set the
parameter:
n->net_conf.tx_queue_size = MIN(virtio_net_max_tx_queue_size(n),
n->net_conf.tx_queue_size);
But the parameter checking uses VIRTQUEUE_MAX_SIZE (1024).
So the parameter is silently ignored and ethtool reports a different
value than the one provided by the user.
... -netdev tap,... -device virtio-net,tx_queue_size=1024
# ethtool -g enp0s2
Ring parameters for enp0s2:
Pre-set maximums:
RX: 256
RX Mini: n/a
RX Jumbo: n/a
TX: 256
Current hardware settings:
RX: 256
RX Mini: n/a
RX Jumbo: n/a
TX: 256
... -netdev vhost-user,... -device virtio-net,tx_queue_size=2048
Invalid tx_queue_size (= 2048), must be a power of 2 between 256 and 1024
With this patch the correct maximum value is checked and displayed.
For vDPA/vhost-user:
Invalid tx_queue_size (= 2048), must be a power of 2 between 256 and 1024
For all the others:
Invalid tx_queue_size (= 512), must be a power of 2 between 256 and 256
Fixes: 2eef278b9e63 ("virtio-net: fix tx queue size for !vhost-user")
Cc: mst@redhat.com
Cc: qemu-stable@nongnu.org
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
(cherry picked from commit 4271f4038372f174dbafffacca1a748d058a03ba)
---
hw/net/virtio-net.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 447f669921..ae1e6a5e3d 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -3628,12 +3628,12 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp)
}
if (n->net_conf.tx_queue_size < VIRTIO_NET_TX_QUEUE_MIN_SIZE ||
- n->net_conf.tx_queue_size > VIRTQUEUE_MAX_SIZE ||
+ n->net_conf.tx_queue_size > virtio_net_max_tx_queue_size(n) ||
!is_power_of_2(n->net_conf.tx_queue_size)) {
error_setg(errp, "Invalid tx_queue_size (= %" PRIu16 "), "
"must be a power of 2 between %d and %d",
n->net_conf.tx_queue_size, VIRTIO_NET_TX_QUEUE_MIN_SIZE,
- VIRTQUEUE_MAX_SIZE);
+ virtio_net_max_tx_queue_size(n));
virtio_cleanup(vdev);
return;
}
--
2.39.3

41
qemu-kvm.spec
View File

@ -149,7 +149,7 @@ Obsoletes: %{name}-block-ssh <= %{epoch}:%{version} \
Summary: QEMU is a machine emulator and virtualizer
Name: qemu-kvm
Version: 8.0.0
Release: 9%{?rcrel}%{?dist}%{?cc_suffix}
Release: 10%{?rcrel}%{?dist}%{?cc_suffix}
# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
# Epoch 15 used for RHEL 8
# Epoch 17 used for RHEL 9 (due to release versioning offset in RHEL 8.5)
@ -468,6 +468,24 @@ Patch155: kvm-net-socket-move-fd-type-checking-to-its-own-function.patch
Patch156: kvm-net-socket-remove-net_init_socket.patch
# For bz#2215819 - Migration test failed while guest with PCIe devices
Patch157: kvm-pcie-Add-hotplug-detect-state-register-to-cmask.patch
# For bz#2174676 - Guest hit EXT4-fs error on host 4K disk when repeatedly hot-plug/unplug running IO disk [RHEL9]
Patch158: kvm-util-iov-Make-qiov_slice-public.patch
# For bz#2174676 - Guest hit EXT4-fs error on host 4K disk when repeatedly hot-plug/unplug running IO disk [RHEL9]
Patch159: kvm-block-Collapse-padded-I-O-vecs-exceeding-IOV_MAX.patch
# For bz#2174676 - Guest hit EXT4-fs error on host 4K disk when repeatedly hot-plug/unplug running IO disk [RHEL9]
Patch160: kvm-util-iov-Remove-qemu_iovec_init_extended.patch
# For bz#2174676 - Guest hit EXT4-fs error on host 4K disk when repeatedly hot-plug/unplug running IO disk [RHEL9]
Patch161: kvm-iotests-iov-padding-New-test.patch
# For bz#2174676 - Guest hit EXT4-fs error on host 4K disk when repeatedly hot-plug/unplug running IO disk [RHEL9]
Patch162: kvm-block-Fix-pad_request-s-request-restriction.patch
# For RHEL-573 - [mlx vhost_vdpa][rhel 9.3]live migration fail with "net vdpa cannot migrate with CVQ feature"
Patch163: kvm-vdpa-do-not-block-migration-if-device-has-cvq-and-x-.patch
# For bz#2040509 - [RFE]:Add support for changing "tx_queue_size" to a setable value
Patch164: kvm-virtio-net-correctly-report-maximum-tx_queue_size-va.patch
# For bz#2223691 - [machine type 9.2]Failed to migrate VM from RHEL 9.3 to RHEL 9.2
Patch165: kvm-hw-pci-Disable-PCI_ERR_UNCOR_MASK-reg-for-machine-ty.patch
# For bz#2141965 - [TPM][vhost-vdpa][rhel9.2]Boot a guest with "vhost-vdpa + TPM emulator", qemu output: qemu-kvm: vhost_vdpa_listener_region_add received unaligned region
Patch166: kvm-vhost-vdpa-mute-unaligned-memory-error-report.patch
%if %{have_clang}
BuildRequires: clang
@ -1529,6 +1547,27 @@ useradd -r -u 107 -g qemu -G kvm -d / -s /sbin/nologin \
%endif
%changelog
* Mon Jul 31 2023 Miroslav Rezanina <mrezanin@redhat.com> - 8.0.0-10
- kvm-util-iov-Make-qiov_slice-public.patch [bz#2174676]
- kvm-block-Collapse-padded-I-O-vecs-exceeding-IOV_MAX.patch [bz#2174676]
- kvm-util-iov-Remove-qemu_iovec_init_extended.patch [bz#2174676]
- kvm-iotests-iov-padding-New-test.patch [bz#2174676]
- kvm-block-Fix-pad_request-s-request-restriction.patch [bz#2174676]
- kvm-vdpa-do-not-block-migration-if-device-has-cvq-and-x-.patch [RHEL-573]
- kvm-virtio-net-correctly-report-maximum-tx_queue_size-va.patch [bz#2040509]
- kvm-hw-pci-Disable-PCI_ERR_UNCOR_MASK-reg-for-machine-ty.patch [bz#2223691]
- kvm-vhost-vdpa-mute-unaligned-memory-error-report.patch [bz#2141965]
- Resolves: bz#2174676
(Guest hit EXT4-fs error on host 4K disk when repeatedly hot-plug/unplug running IO disk [RHEL9])
- Resolves: RHEL-573
([mlx vhost_vdpa][rhel 9.3]live migration fail with "net vdpa cannot migrate with CVQ feature")
- Resolves: bz#2040509
([RFE]:Add support for changing "tx_queue_size" to a setable value)
- Resolves: bz#2223691
([machine type 9.2]Failed to migrate VM from RHEL 9.3 to RHEL 9.2)
- Resolves: bz#2141965
([TPM][vhost-vdpa][rhel9.2]Boot a guest with "vhost-vdpa + TPM emulator", qemu output: qemu-kvm: vhost_vdpa_listener_region_add received unaligned region)
* Mon Jul 24 2023 Miroslav Rezanina <mrezanin@redhat.com> - 8.0.0-9
- kvm-scsi-fetch-unit-attention-when-creating-the-request.patch [bz#2176702]
- kvm-scsi-cleanup-scsi_clear_unit_attention.patch [bz#2176702]