From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, chenbo.xia@intel.com, xuan.ding@intel.com
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [dpdk-dev] [PATCH v2 1/3] vhost: refactor postcopy region registration
Date: Tue, 5 Jan 2021 13:57:26 +0100 [thread overview]
Message-ID: <20210105125728.102413-2-maxime.coquelin@redhat.com> (raw)
In-Reply-To: <20210105125728.102413-1-maxime.coquelin@redhat.com>
This patch moves the registration of memory regions to
userfaultfd to a dedicated function, with the goal of
simplifying VHOST_USER_SET_MEM_TABLE request handling
function.
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
lib/librte_vhost/vhost_user.c | 77 +++++++++++++++++++++--------------
1 file changed, 46 insertions(+), 31 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 45c8ac09da..b6c8e2e17f 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -998,6 +998,49 @@ vhost_memory_changed(struct VhostUserMemory *new,
return false;
}
+#ifdef RTE_LIBRTE_VHOST_POSTCOPY
+static int
+vhost_user_postcopy_region_register(struct virtio_net *dev,
+ struct rte_vhost_mem_region *reg)
+{
+ struct uffdio_register reg_struct;
+
+ /*
+ * Let's register all the mmap'ed area to ensure
+ * alignment on page boundary.
+ */
+ reg_struct.range.start = (uint64_t)(uintptr_t)reg->mmap_addr;
+ reg_struct.range.len = reg->mmap_size;
+ reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
+
+ if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
+ ®_struct)) {
+ VHOST_LOG_CONFIG(ERR, "Failed to register ufd for region "
+ "%" PRIx64 " - %" PRIx64 " (ufd = %d) %s\n",
+ (uint64_t)reg_struct.range.start,
+ (uint64_t)reg_struct.range.start +
+ (uint64_t)reg_struct.range.len - 1,
+ dev->postcopy_ufd,
+ strerror(errno));
+ return -1;
+ }
+
+ VHOST_LOG_CONFIG(INFO, "\t userfaultfd registered for range : %" PRIx64 " - %" PRIx64 "\n",
+ (uint64_t)reg_struct.range.start,
+ (uint64_t)reg_struct.range.start +
+ (uint64_t)reg_struct.range.len - 1);
+
+ return 0;
+}
+#else
+static int
+vhost_user_postcopy_region_register(struct virtio_net *dev __rte_unused,
+ struct rte_vhost_mem_region *reg __rte_unused)
+{
+ return -1;
+}
+#endif
+
static int
vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd)
@@ -1209,38 +1252,10 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
}
/* Now userfault register and we can use the memory */
- for (i = 0; i < memory->nregions; i++) {
-#ifdef RTE_LIBRTE_VHOST_POSTCOPY
- reg = &dev->mem->regions[i];
- struct uffdio_register reg_struct;
-
- /*
- * Let's register all the mmap'ed area to ensure
- * alignment on page boundary.
- */
- reg_struct.range.start =
- (uint64_t)(uintptr_t)reg->mmap_addr;
- reg_struct.range.len = reg->mmap_size;
- reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
-
- if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
- ®_struct)) {
- VHOST_LOG_CONFIG(ERR,
- "Failed to register ufd for region %d: (ufd = %d) %s\n",
- i, dev->postcopy_ufd,
- strerror(errno));
+ for (i = 0; i < memory->nregions; i++)
+ if (vhost_user_postcopy_region_register(dev,
+ &dev->mem->regions[i]) < 0)
goto free_mem_table;
- }
- VHOST_LOG_CONFIG(INFO,
- "\t userfaultfd registered for range : "
- "%" PRIx64 " - %" PRIx64 "\n",
- (uint64_t)reg_struct.range.start,
- (uint64_t)reg_struct.range.start +
- (uint64_t)reg_struct.range.len - 1);
-#else
- goto free_mem_table;
-#endif
- }
}
for (i = 0; i < dev->nr_vring; i++) {
--
2.29.2
next prev parent reply other threads:[~2021-01-05 12:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-05 12:57 [dpdk-dev] [PATCH v2 0/3] vhost: vhost_user_set_mem_table refactoring Maxime Coquelin
2021-01-05 12:57 ` Maxime Coquelin [this message]
2021-01-08 2:57 ` [dpdk-dev] [PATCH v2 1/3] vhost: refactor postcopy region registration Xia, Chenbo
2021-01-05 12:57 ` [dpdk-dev] [PATCH v2 2/3] vhost: refactor postcopy registration Maxime Coquelin
2021-01-05 12:57 ` [dpdk-dev] [PATCH v2 3/3] vhost: refactor memory regions mapping Maxime Coquelin
2021-01-08 9:16 ` [dpdk-dev] [PATCH v2 0/3] vhost: vhost_user_set_mem_table refactoring Maxime Coquelin
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