[libos] Implement IO_Uring feature config

.github/workflows/composite_action/prebuild/action.yml

@@ -18,5 +18,6 @@ runs:
         docker exec ${{ inputs.container-name }} bash -c "git config --global --add safe.directory /root/occlum/deps/rust-sgx-sdk";
         docker exec ${{ inputs.container-name }} bash -c "git config --global --add safe.directory /root/occlum/deps/sefs";
         docker exec ${{ inputs.container-name }} bash -c "git config --global --add safe.directory /root/occlum/deps/serde-json-sgx";
-        docker exec ${{ inputs.container-name }} bash -c "git config --global --add safe.directory /root/occlum/deps/serde-sgx"
+        docker exec ${{ inputs.container-name }} bash -c "git config --global --add safe.directory /root/occlum/deps/serde-sgx";
+        docker exec ${{ inputs.container-name }} bash -c "git config --global --add safe.directory /root/occlum/deps/io-uring"
       shell: bash

docs/readthedocs/docs/source/occlum_configuration.md

@@ -72,6 +72,13 @@ The template of `Occlum.json` is shown below.
     },
     // Features
     "feature": {
+        // Determines the use of the IO_Uring feature in Occlum for network I/O operations.
+        // Enabling IO_Uring feature can improve network I/O performance.
+        //
+        // "io_uring": 0 - Disables IO_Uring; network I/O uses Ocall instead.
+        // "io_uring": 1 - Enables IO_Uring with a single IO_Uring instance.
+        // "io_uring": n (1 < n <= 16) - Enables IO_Uring with 'n' IO_Uring instances.
+        "io_uring": 0,
         // Whether to turn on AMX feature in Occlum
         // Occlum supports AMX instruction running inside the enclave when user enables it
         //

etc/template/Occlum.json

@@ -38,6 +38,7 @@
     "feature": {
         "amx": 0,
         "pkru": 0,
+        "io_uring": 0,
         "enable_edmm": false,
         "enable_posix_shm": false
     },

src/libos/src/config.rs

@@ -148,6 +148,7 @@ pub struct ConfigApp {
 pub struct ConfigFeature {
     pub amx: u32,
     pub pkru: u32,
+    pub io_uring: u32,
     pub enable_edmm: bool,
     pub enable_posix_shm: bool,
 }
@@ -307,6 +308,7 @@ impl ConfigFeature {
         Ok(ConfigFeature {
             amx: input.amx,
             pkru: input.pkru,
+            io_uring: input.io_uring,
             enable_edmm: input.enable_edmm,
             enable_posix_shm: input.enable_posix_shm,
         })
@@ -538,6 +540,8 @@ struct InputConfigFeature {
     #[serde(default)]
     pub pkru: u32,
     #[serde(default)]
+    pub io_uring: u32,
+    #[serde(default)]
     pub enable_edmm: bool,
     #[serde(default)]
     pub enable_posix_shm: bool,
@@ -548,6 +552,7 @@ impl Default for InputConfigFeature {
         InputConfigFeature {
             amx: 0,
             pkru: 0,
+            io_uring: 0,
             enable_edmm: false,
             enable_posix_shm: false,
         }

test/Occlum.json

@@ -44,6 +44,7 @@
     "feature": {
         "amx": 0,
         "pkru": 0,
+        "io_uring": 0,
         "enable_edmm": false,
         "enable_posix_shm": true
     },

tools/gen_internal_conf/src/main.rs

@@ -160,6 +160,12 @@ fn main() {
                 "WITHOUT"
             }
         );
+
+        debug!(
+            "Enable IO_Uring feature with {:?} instances",
+            occlum_config.feature.io_uring
+        );
+
         debug!(
             "user config init num of threads = {:?}",
             occlum_config.resource_limits.init_num_of_threads
@@ -448,7 +454,7 @@ fn main() {
             TCSNum: tcs_init_num,
             TCSMinPool: tcs_min_pool,
             TCSMaxNum: tcs_max_num,
-            TCSPolicy: 1,
+            TCSPolicy: 0,
             DisableDebug: match occlum_config.metadata.debuggable {
                 true => 0,
                 false => 1,
@@ -758,6 +764,8 @@ struct OcclumFeature {
     #[serde(default)]
     pkru: u32,
     #[serde(default)]
+    io_uring: u32,
+    #[serde(default)]
     enable_edmm: bool,
     #[serde(default)]
     enable_posix_shm: bool,