Re: [PATCH v1 2/8] vfio/type1: Add vfio_iommu_type1 parameter for quota tuning

From: kbuild test robot
Date: Sun Mar 22 2020 - 13:21:21 EST

Hi Yi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on vfio/next]
[also build test ERROR on v5.6-rc6 next-20200320]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Liu-Yi-L/vfio-expose-virtual-Shared-Virtual-Addressing-to-VMs/20200322-213259
base: https://github.com/awilliam/linux-vfio.git next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.2.0
reproduce:
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
GCC_VERSION=9.2.0 make.cross ARCH=arm64

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

All errors (new ones prefixed by >>):

drivers/vfio/vfio.c: In function 'vfio_create_mm':
drivers/vfio/vfio.c:2149:8: error: implicit declaration of function 'ioasid_alloc_set'; did you mean 'ioasid_alloc'? [-Werror=implicit-function-declaration]
2149 | ret = ioasid_alloc_set((struct ioasid_set *) mm,
| ^~~~~~~~~~~~~~~~
| ioasid_alloc
drivers/vfio/vfio.c:2158:13: warning: assignment to 'long long unsigned int' from 'struct mm_struct *' makes integer from pointer without a cast [-Wint-conversion]
2158 | token->val = mm;
| ^
drivers/vfio/vfio.c: In function 'vfio_mm_unlock_and_free':
drivers/vfio/vfio.c:2170:2: error: implicit declaration of function 'ioasid_free_set'; did you mean 'ioasid_free'? [-Werror=implicit-function-declaration]
2170 | ioasid_free_set(vmm->ioasid_sid, true);
| ^~~~~~~~~~~~~~~
| ioasid_free
drivers/vfio/vfio.c: In function 'vfio_mm_pasid_alloc':
>> drivers/vfio/vfio.c:2230:3: error: implicit declaration of function 'ioasid_adjust_set' [-Werror=implicit-function-declaration]
2230 | ioasid_adjust_set(vmm->ioasid_sid, quota);
| ^~~~~~~~~~~~~~~~~
drivers/vfio/vfio.c:2233:26: warning: passing argument 1 of 'ioasid_alloc' makes pointer from integer without a cast [-Wint-conversion]
2233 | pasid = ioasid_alloc(vmm->ioasid_sid, min, max, NULL);
| ~~~^~~~~~~~~~~~
| |
| int
In file included from include/linux/iommu.h:16,
from drivers/vfio/vfio.c:20:
include/linux/ioasid.h:45:56: note: expected 'struct ioasid_set *' but argument is of type 'int'
45 | static inline ioasid_t ioasid_alloc(struct ioasid_set *set, ioasid_t min,
| ~~~~~~~~~~~~~~~~~~~^~~
drivers/vfio/vfio.c: In function 'vfio_mm_pasid_free':
drivers/vfio/vfio.c:2252:25: warning: passing argument 1 of 'ioasid_find' makes pointer from integer without a cast [-Wint-conversion]
2252 | pdata = ioasid_find(vmm->ioasid_sid, pasid, NULL);
| ~~~^~~~~~~~~~~~
| |
| int
In file included from include/linux/iommu.h:16,
from drivers/vfio/vfio.c:20:
include/linux/ioasid.h:55:52: note: expected 'struct ioasid_set *' but argument is of type 'int'
55 | static inline void *ioasid_find(struct ioasid_set *set, ioasid_t ioasid,
| ~~~~~~~~~~~~~~~~~~~^~~
cc1: some warnings being treated as errors

vim +/ioasid_adjust_set +2230 drivers/vfio/vfio.c

2133
2134 /**
2135 * VFIO_MM objects - create, release, get, put, search
2136 * Caller of the function should have held vfio.vfio_mm_lock.
2137 */
2138 static struct vfio_mm *vfio_create_mm(struct mm_struct *mm)
2139 {
2140 struct vfio_mm *vmm;
2141 struct vfio_mm_token *token;
2142 int ret = 0;
2143
2144 vmm = kzalloc(sizeof(*vmm), GFP_KERNEL);
2145 if (!vmm)
2146 return ERR_PTR(-ENOMEM);
2147
2148 /* Per mm IOASID set used for quota control and group operations */
2149 ret = ioasid_alloc_set((struct ioasid_set *) mm,
2150 VFIO_DEFAULT_PASID_QUOTA, &vmm->ioasid_sid);
2151 if (ret) {
2152 kfree(vmm);
2153 return ERR_PTR(ret);
2154 }
2155
2156 kref_init(&vmm->kref);
2157 token = &vmm->token;
> 2158 token->val = mm;
2159 vmm->pasid_quota = VFIO_DEFAULT_PASID_QUOTA;
2160 mutex_init(&vmm->pasid_lock);
2161
2162 list_add(&vmm->vfio_next, &vfio.vfio_mm_list);
2163
2164 return vmm;
2165 }
2166
2167 static void vfio_mm_unlock_and_free(struct vfio_mm *vmm)
2168 {
2169 /* destroy the ioasid set */
2170 ioasid_free_set(vmm->ioasid_sid, true);
2171 mutex_unlock(&vfio.vfio_mm_lock);
2172 kfree(vmm);
2173 }
2174
2175 /* called with vfio.vfio_mm_lock held */
2176 static void vfio_mm_release(struct kref *kref)
2177 {
2178 struct vfio_mm *vmm = container_of(kref, struct vfio_mm, kref);
2179
2180 list_del(&vmm->vfio_next);
2181 vfio_mm_unlock_and_free(vmm);
2182 }
2183
2184 void vfio_mm_put(struct vfio_mm *vmm)
2185 {
2186 kref_put_mutex(&vmm->kref, vfio_mm_release, &vfio.vfio_mm_lock);
2187 }
2188 EXPORT_SYMBOL_GPL(vfio_mm_put);
2189
2190 /* Assume vfio_mm_lock or vfio_mm reference is held */
2191 static void vfio_mm_get(struct vfio_mm *vmm)
2192 {
2193 kref_get(&vmm->kref);
2194 }
2195
2196 struct vfio_mm *vfio_mm_get_from_task(struct task_struct *task)
2197 {
2198 struct mm_struct *mm = get_task_mm(task);
2199 struct vfio_mm *vmm;
2200 unsigned long long val = (unsigned long long) mm;
2201
2202 mutex_lock(&vfio.vfio_mm_lock);
2203 list_for_each_entry(vmm, &vfio.vfio_mm_list, vfio_next) {
2204 if (vmm->token.val == val) {
2205 vfio_mm_get(vmm);
2206 goto out;
2207 }
2208 }
2209
2210 vmm = vfio_create_mm(mm);
2211 if (IS_ERR(vmm))
2212 vmm = NULL;
2213 out:
2214 mutex_unlock(&vfio.vfio_mm_lock);
2215 mmput(mm);
2216 return vmm;
2217 }
2218 EXPORT_SYMBOL_GPL(vfio_mm_get_from_task);
2219
2220 int vfio_mm_pasid_alloc(struct vfio_mm *vmm, int quota, int min, int max)
2221 {
2222 ioasid_t pasid;
2223 int ret = -ENOSPC;
2224
2225 mutex_lock(&vmm->pasid_lock);
2226
2227 /* update quota as it is tunable by admin */
2228 if (vmm->pasid_quota != quota) {
2229 vmm->pasid_quota = quota;
> 2230 ioasid_adjust_set(vmm->ioasid_sid, quota);
2231 }
2232
2233 pasid = ioasid_alloc(vmm->ioasid_sid, min, max, NULL);
2234 if (pasid == INVALID_IOASID) {
2235 ret = -ENOSPC;
2236 goto out_unlock;
2237 }
2238
2239 ret = pasid;
2240 out_unlock:
2241 mutex_unlock(&vmm->pasid_lock);
2242 return ret;
2243 }
2244 EXPORT_SYMBOL_GPL(vfio_mm_pasid_alloc);
2245

---
0-DAY CI Kernel Test Service, Intel Corporation
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