Re: [PATCH v5 2/2] misc: Add a mechanism to detect stalls on guest vCPUs
From: kernel test robot
Date: Mon May 09 2022 - 16:45:09 EST
Hi Sebastian,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on robh/for-next]
[also build test WARNING on char-misc/char-misc-testing soc/for-next v5.18-rc6]
[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/intel-lab-lkp/linux/commits/Sebastian-Ene/Detect-stalls-on-guest-vCPUS/20220509-174959
base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: h8300-randconfig-s032-20220509 (https://download.01.org/0day-ci/archive/20220510/202205100420.UlVQD7zP-lkp@xxxxxxxxx/config)
compiler: h8300-linux-gcc (GCC) 11.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://github.com/intel-lab-lkp/linux/commit/d3152372fdd19448b32806c0bffd78d8729d02e4
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Sebastian-Ene/Detect-stalls-on-guest-vCPUS/20220509-174959
git checkout d3152372fdd19448b32806c0bffd78d8729d02e4
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=h8300 SHELL=/bin/bash drivers/misc/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
sparse warnings: (new ones prefixed by >>)
>> drivers/misc/vcpu_stall_detector.c:106:33: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct vm_stall_detect_s * @@
drivers/misc/vcpu_stall_detector.c:106:33: sparse: expected void const [noderef] __percpu *__vpp_verify
drivers/misc/vcpu_stall_detector.c:106:33: sparse: got struct vm_stall_detect_s *
drivers/misc/vcpu_stall_detector.c:115:32: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct vm_stall_detect_s * @@
drivers/misc/vcpu_stall_detector.c:115:32: sparse: expected void const [noderef] __percpu *__vpp_verify
drivers/misc/vcpu_stall_detector.c:115:32: sparse: got struct vm_stall_detect_s *
>> drivers/misc/vcpu_stall_detector.c:131:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct vm_stall_detect_s *vm_stall_detect @@ got struct vm_stall_detect_s [noderef] __percpu * @@
drivers/misc/vcpu_stall_detector.c:131:25: sparse: expected struct vm_stall_detect_s *vm_stall_detect
drivers/misc/vcpu_stall_detector.c:131:25: sparse: got struct vm_stall_detect_s [noderef] __percpu *
drivers/misc/vcpu_stall_detector.c:154:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct vm_stall_detect_s * @@
drivers/misc/vcpu_stall_detector.c:154:36: sparse: expected void const [noderef] __percpu *__vpp_verify
drivers/misc/vcpu_stall_detector.c:154:36: sparse: got struct vm_stall_detect_s *
>> drivers/misc/vcpu_stall_detector.c:177:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __percpu *__pdata @@ got struct vm_stall_detect_s *vm_stall_detect @@
drivers/misc/vcpu_stall_detector.c:177:21: sparse: expected void [noderef] __percpu *__pdata
drivers/misc/vcpu_stall_detector.c:177:21: sparse: got struct vm_stall_detect_s *vm_stall_detect
drivers/misc/vcpu_stall_detector.c:189:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct vm_stall_detect_s * @@
drivers/misc/vcpu_stall_detector.c:189:36: sparse: expected void const [noderef] __percpu *__vpp_verify
drivers/misc/vcpu_stall_detector.c:189:36: sparse: got struct vm_stall_detect_s *
drivers/misc/vcpu_stall_detector.c:194:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __percpu *__pdata @@ got struct vm_stall_detect_s *vm_stall_detect @@
drivers/misc/vcpu_stall_detector.c:194:21: sparse: expected void [noderef] __percpu *__pdata
drivers/misc/vcpu_stall_detector.c:194:21: sparse: got struct vm_stall_detect_s *vm_stall_detect
drivers/misc/vcpu_stall_detector.c: note: in included file (through include/linux/io.h):
arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
arch/h8300/include/asm/io.h:44:11: sparse: sparse: cast removes address space '__iomem' of expression
vim +106 drivers/misc/vcpu_stall_detector.c
100
101 static int start_stall_detector_on_cpu(unsigned int cpu)
102 {
103 struct vm_stall_detect_s *vm_stall_detect;
104
105 vm_stall_detect = platform_get_drvdata(virt_dev);
> 106 vcpu_stall_detect_start(this_cpu_ptr(vm_stall_detect));
107 return 0;
108 }
109
110 static int stop_stall_detector_on_cpu(unsigned int cpu)
111 {
112 struct vm_stall_detect_s *vm_stall_detect;
113
114 vm_stall_detect = platform_get_drvdata(virt_dev);
115 vcpu_stall_detect_stop(this_cpu_ptr(vm_stall_detect));
116 return 0;
117 }
118
119 static int vcpu_stall_detect_probe(struct platform_device *dev)
120 {
121 int cpu, ret, err;
122 void __iomem *membase;
123 struct resource *r;
124 struct vm_stall_detect_s *vm_stall_detect;
125 u32 stall_detect_clock, stall_detect_timeout_sec = 0;
126
127 r = platform_get_resource(dev, IORESOURCE_MEM, 0);
128 if (r == NULL)
129 return -ENOENT;
130
> 131 vm_stall_detect = alloc_percpu(typeof(struct vm_stall_detect_s));
132 if (!vm_stall_detect)
133 return -ENOMEM;
134
135 membase = ioremap(r->start, resource_size(r));
136 if (!membase) {
137 ret = -ENXIO;
138 goto err_withmem;
139 }
140
141 virt_dev = dev;
142 platform_set_drvdata(dev, vm_stall_detect);
143 if (of_property_read_u32(dev->dev.of_node, "clock-frequency",
144 &stall_detect_clock))
145 stall_detect_clock = DEFAULT_CLOCK_HZ;
146
147 if (of_property_read_u32(dev->dev.of_node, "timeout-sec",
148 &stall_detect_timeout_sec))
149 stall_detect_timeout_sec = DEFAULT_TIMEOT_SEC;
150
151 for_each_cpu_and(cpu, cpu_online_mask, &watchdog_cpumask) {
152 struct vm_stall_detect_s *cpu_stall_detect;
153
154 cpu_stall_detect = per_cpu_ptr(vm_stall_detect, cpu);
155 cpu_stall_detect->membase = membase + cpu * REG_LEN;
156 cpu_stall_detect->clock_freq = stall_detect_clock;
157 cpu_stall_detect->expiration_sec = stall_detect_timeout_sec;
158 cpu_stall_detect->ping_timeout_ms = stall_detect_timeout_sec *
159 MSEC_PER_SEC / 2;
160 smp_call_function_single(cpu, vcpu_stall_detect_start,
161 cpu_stall_detect, true);
162 }
163
164 err = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
165 "virt/vcpu_stall_detector:online",
166 start_stall_detector_on_cpu,
167 stop_stall_detector_on_cpu);
168 if (err < 0) {
169 dev_warn(&dev->dev, "failed to install cpu hotplug");
170 ret = err;
171 goto err_withmem;
172 }
173
174 return 0;
175
176 err_withmem:
> 177 free_percpu(vm_stall_detect);
178 return ret;
179 }
180
--
0-DAY CI Kernel Test Service
https://01.org/lkp