Re: [PATCH v6 15/18] nitro_enclaves: Add Makefile for the Nitro Enclaves driver

From: Paraschiv, Andra-Irina
Date: Thu Aug 06 2020 - 01:22:48 EST

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In reply to: kernel test robot: "Re: [PATCH v6 15/18] nitro_enclaves: Add Makefile for the Nitro Enclaves driver"
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On 05/08/2020 17:23, kernel test robot wrote:

Hi Andra,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on linus/master v5.8 next-20200805]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Andra-Paraschiv/Add-support-for-Nitro-Enclaves/20200805-171942
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bcf876870b95592b52519ed4aafcf9d95999bc9c
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64

Removed, for now, the dependency on ARM64 arch. x86 is currently supported, with Arm to come afterwards.

Thanks,
Andra

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

drivers/virt/nitro_enclaves/ne_misc_dev.c: In function 'ne_setup_cpu_pool':

drivers/virt/nitro_enclaves/ne_misc_dev.c:245:46: error: 'smp_num_siblings' undeclared (first use in this function); did you mean 'cpu_sibling'?

245 | ne_cpu_pool.avail_cores_size = nr_cpu_ids / smp_num_siblings;
| ^~~~~~~~~~~~~~~~
| cpu_sibling
drivers/virt/nitro_enclaves/ne_misc_dev.c:245:46: note: each undeclared identifier is reported only once for each function it appears in
drivers/virt/nitro_enclaves/ne_misc_dev.c: In function 'ne_enclave_ioctl':
drivers/virt/nitro_enclaves/ne_misc_dev.c:928:54: error: 'smp_num_siblings' undeclared (first use in this function)
928 | if (vcpu_id >= (ne_enclave->avail_cpu_cores_size * smp_num_siblings)) {
| ^~~~~~~~~~~~~~~~

vim +245 drivers/virt/nitro_enclaves/ne_misc_dev.c

7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 130
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 131 /**
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 132 * ne_setup_cpu_pool() - Set the NE CPU pool after handling sanity checks such
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 133 * as not sharing CPU cores with the primary / parent VM
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 134 * or not using CPU 0, which should remain available for
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 135 * the primary / parent VM. Offline the CPUs from the
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 136 * pool after the checks passed.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 137 * @ne_cpu_list: The CPU list used for setting NE CPU pool.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 138 *
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 139 * Context: Process context.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 140 * Return:
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 141 * * 0 on success.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 142 * * Negative return value on failure.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 143 */
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 144 static int ne_setup_cpu_pool(const char *ne_cpu_list)
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 145 {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 146 int core_id = -1;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 147 unsigned int cpu = 0;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 148 cpumask_var_t cpu_pool = NULL;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 149 unsigned int cpu_sibling = 0;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 150 unsigned int i = 0;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 151 int numa_node = -1;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 152 int rc = -EINVAL;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 153
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 154 if (!ne_cpu_list)
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 155 return 0;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 156
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 157 if (!zalloc_cpumask_var(&cpu_pool, GFP_KERNEL))
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 158 return -ENOMEM;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 159
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 160 mutex_lock(&ne_cpu_pool.mutex);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 161
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 162 rc = cpulist_parse(ne_cpu_list, cpu_pool);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 163 if (rc < 0) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 164 pr_err("%s: Error in cpulist parse [rc=%d]\n", ne_misc_dev.name, rc);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 165
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 166 goto free_pool_cpumask;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 167 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 168
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 169 cpu = cpumask_any(cpu_pool);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 170 if (cpu >= nr_cpu_ids) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 171 pr_err("%s: No CPUs available in CPU pool\n", ne_misc_dev.name);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 172
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 173 rc = -EINVAL;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 174
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 175 goto free_pool_cpumask;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 176 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 177
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 178 /*
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 179 * Check if the CPUs from the NE CPU pool are from the same NUMA node.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 180 */
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 181 for_each_cpu(cpu, cpu_pool) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 182 if (numa_node < 0) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 183 numa_node = cpu_to_node(cpu);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 184 if (numa_node < 0) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 185 pr_err("%s: Invalid NUMA node %d\n",
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 186 ne_misc_dev.name, numa_node);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 187
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 188 rc = -EINVAL;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 189
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 190 goto free_pool_cpumask;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 191 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 192 } else {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 193 if (numa_node != cpu_to_node(cpu)) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 194 pr_err("%s: CPUs with different NUMA nodes\n",
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 195 ne_misc_dev.name);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 196
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 197 rc = -EINVAL;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 198
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 199 goto free_pool_cpumask;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 200 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 201 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 202 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 203
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 204 /*
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 205 * Check if CPU 0 and its siblings are included in the provided CPU pool
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 206 * They should remain available for the primary / parent VM.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 207 */
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 208 if (cpumask_test_cpu(0, cpu_pool)) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 209 pr_err("%s: CPU 0 has to remain available\n", ne_misc_dev.name);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 210
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 211 rc = -EINVAL;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 212
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 213 goto free_pool_cpumask;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 214 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 215
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 216 for_each_cpu(cpu_sibling, topology_sibling_cpumask(0)) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 217 if (cpumask_test_cpu(cpu_sibling, cpu_pool)) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 218 pr_err("%s: CPU sibling %d for CPU 0 is in CPU pool\n",
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 219 ne_misc_dev.name, cpu_sibling);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 220
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 221 rc = -EINVAL;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 222
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 223 goto free_pool_cpumask;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 224 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 225 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 226
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 227 /*
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 228 * Check if CPU siblings are included in the provided CPU pool. The
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 229 * expectation is that CPU cores are made available in the CPU pool for
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 230 * enclaves.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 231 */
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 232 for_each_cpu(cpu, cpu_pool) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 233 for_each_cpu(cpu_sibling, topology_sibling_cpumask(cpu)) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 234 if (!cpumask_test_cpu(cpu_sibling, cpu_pool)) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 235 pr_err("%s: CPU %d is not in CPU pool\n",
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 236 ne_misc_dev.name, cpu_sibling);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 237
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 238 rc = -EINVAL;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 239
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 240 goto free_pool_cpumask;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 241 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 242 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 243 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 244
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 @245 ne_cpu_pool.avail_cores_size = nr_cpu_ids / smp_num_siblings;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 246
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 247 ne_cpu_pool.avail_cores = kcalloc(ne_cpu_pool.avail_cores_size,
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 248 sizeof(*ne_cpu_pool.avail_cores),
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 249 GFP_KERNEL);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 250 if (!ne_cpu_pool.avail_cores) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 251 rc = -ENOMEM;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 252
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 253 goto free_pool_cpumask;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 254 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 255
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 256 for (i = 0; i < ne_cpu_pool.avail_cores_size; i++)
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 257 if (!zalloc_cpumask_var(&ne_cpu_pool.avail_cores[i], GFP_KERNEL)) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 258 rc = -ENOMEM;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 259
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 260 goto free_cores_cpumask;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 261 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 262
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 263 /* Split the NE CPU pool in CPU cores. */
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 264 for_each_cpu(cpu, cpu_pool) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 265 core_id = topology_core_id(cpu);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 266 if (core_id < 0 || core_id >= ne_cpu_pool.avail_cores_size) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 267 pr_err("%s: Invalid core id %d\n",
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 268 ne_misc_dev.name, core_id);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 269
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 270 rc = -EINVAL;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 271
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 272 goto clear_cpumask;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 273 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 274
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 275 cpumask_set_cpu(cpu, ne_cpu_pool.avail_cores[core_id]);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 276 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 277
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 278 /*
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 279 * CPUs that are given to enclave(s) should not be considered online
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 280 * by Linux anymore, as the hypervisor will degrade them to floating.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 281 * The physical CPUs (full cores) are carved out of the primary / parent
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 282 * VM and given to the enclave VM. The same number of vCPUs would run
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 283 * on less pCPUs for the primary / parent VM.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 284 *
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 285 * We offline them here, to not degrade performance and expose correct
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 286 * topology to Linux and user space.
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 287 */
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 288 for_each_cpu(cpu, cpu_pool) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 289 rc = remove_cpu(cpu);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 290 if (rc != 0) {
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 291 pr_err("%s: CPU %d is not offlined [rc=%d]\n",
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 292 ne_misc_dev.name, cpu, rc);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 293
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 294 goto online_cpus;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 295 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 296 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 297
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 298 free_cpumask_var(cpu_pool);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 299
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 300 ne_cpu_pool.numa_node = numa_node;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 301
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 302 mutex_unlock(&ne_cpu_pool.mutex);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 303
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 304 return 0;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 305
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 306 online_cpus:
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 307 for_each_cpu(cpu, cpu_pool)
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 308 add_cpu(cpu);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 309 clear_cpumask:
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 310 for (i = 0; i < ne_cpu_pool.avail_cores_size; i++)
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 311 cpumask_clear(ne_cpu_pool.avail_cores[i]);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 312 free_cores_cpumask:
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 313 for (i = 0; i < ne_cpu_pool.avail_cores_size; i++)
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 314 free_cpumask_var(ne_cpu_pool.avail_cores[i]);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 315 kfree(ne_cpu_pool.avail_cores);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 316 ne_cpu_pool.avail_cores_size = 0;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 317 free_pool_cpumask:
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 318 free_cpumask_var(cpu_pool);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 319 mutex_unlock(&ne_cpu_pool.mutex);
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 320
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 321 return rc;
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 322 }
7d5c9a7dfa51e60 Andra Paraschiv 2020-08-05 323

---
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Next message: Anson Huang: "[PATCH] dt-bindings: sound: Convert NXP spdif to json-schema"
Previous message: Hugh Dickins: "Re: [RFC PATCH] mm: silence soft lockups from unlock_page"
In reply to: kernel test robot: "Re: [PATCH v6 15/18] nitro_enclaves: Add Makefile for the Nitro Enclaves driver"
Next in thread: Andra Paraschiv: "[PATCH v6 14/18] nitro_enclaves: Add Kconfig for the Nitro Enclaves driver"
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