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Message-ID: <201805200100.O2yJ9wSI%fengguang.wu@intel.com>
Date: Sun, 20 May 2018 01:02:06 +0800
From: kbuild test robot <lkp@...el.com>
To: "K. Y. Srinivasan" <kys@...rosoft.com>
Cc: kbuild-all@...org, linux-kernel@...r.kernel.org,
tipbuild@...or.com, Thomas Gleixner <tglx@...utronix.de>,
Michael Kelley <mikelley@...rosoft.com>
Subject: [tip:x86/hyperv 1/6] arch/x86/hyperv/hv_init.c:302: undefined
reference to `hv_apic_init'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/hyperv
head: 61eeb1f6d1f2648a218855d7c8d44f16df242ef3
commit: 6b48cb5f8347bc0153ff1d7b075db92e6723ffdb [1/6] X86/Hyper-V: Enlighten APIC access
config: i386-randconfig-c0-05191955 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
git checkout 6b48cb5f8347bc0153ff1d7b075db92e6723ffdb
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
arch/x86/hyperv/hv_init.o: In function `hyperv_init':
>> arch/x86/hyperv/hv_init.c:302: undefined reference to `hv_apic_init'
vim +302 arch/x86/hyperv/hv_init.c
238
239 /*
240 * This function is to be invoked early in the boot sequence after the
241 * hypervisor has been detected.
242 *
243 * 1. Setup the hypercall page.
244 * 2. Register Hyper-V specific clocksource.
245 * 3. Setup Hyper-V specific APIC entry points.
246 */
247 void __init hyperv_init(void)
248 {
249 u64 guest_id, required_msrs;
250 union hv_x64_msr_hypercall_contents hypercall_msr;
251 int cpuhp;
252
253 if (x86_hyper_type != X86_HYPER_MS_HYPERV)
254 return;
255
256 /* Absolutely required MSRs */
257 required_msrs = HV_X64_MSR_HYPERCALL_AVAILABLE |
258 HV_X64_MSR_VP_INDEX_AVAILABLE;
259
260 if ((ms_hyperv.features & required_msrs) != required_msrs)
261 return;
262
263 /* Allocate percpu VP index */
264 hv_vp_index = kmalloc_array(num_possible_cpus(), sizeof(*hv_vp_index),
265 GFP_KERNEL);
266 if (!hv_vp_index)
267 return;
268
269 hv_vp_assist_page = kcalloc(num_possible_cpus(),
270 sizeof(*hv_vp_assist_page), GFP_KERNEL);
271 if (!hv_vp_assist_page) {
272 ms_hyperv.hints &= ~HV_X64_ENLIGHTENED_VMCS_RECOMMENDED;
273 goto free_vp_index;
274 }
275
276 cpuhp = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "x86/hyperv_init:online",
277 hv_cpu_init, hv_cpu_die);
278 if (cpuhp < 0)
279 goto free_vp_assist_page;
280
281 /*
282 * Setup the hypercall page and enable hypercalls.
283 * 1. Register the guest ID
284 * 2. Enable the hypercall and register the hypercall page
285 */
286 guest_id = generate_guest_id(0, LINUX_VERSION_CODE, 0);
287 wrmsrl(HV_X64_MSR_GUEST_OS_ID, guest_id);
288
289 hv_hypercall_pg = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_RX);
290 if (hv_hypercall_pg == NULL) {
291 wrmsrl(HV_X64_MSR_GUEST_OS_ID, 0);
292 goto remove_cpuhp_state;
293 }
294
295 rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
296 hypercall_msr.enable = 1;
297 hypercall_msr.guest_physical_address = vmalloc_to_pfn(hv_hypercall_pg);
298 wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
299
300 hyper_alloc_mmu();
301
> 302 hv_apic_init();
303
304 /*
305 * Register Hyper-V specific clocksource.
306 */
307 #ifdef CONFIG_HYPERV_TSCPAGE
308 if (ms_hyperv.features & HV_X64_MSR_REFERENCE_TSC_AVAILABLE) {
309 union hv_x64_msr_hypercall_contents tsc_msr;
310
311 tsc_pg = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL);
312 if (!tsc_pg)
313 goto register_msr_cs;
314
315 hyperv_cs = &hyperv_cs_tsc;
316
317 rdmsrl(HV_X64_MSR_REFERENCE_TSC, tsc_msr.as_uint64);
318
319 tsc_msr.enable = 1;
320 tsc_msr.guest_physical_address = vmalloc_to_pfn(tsc_pg);
321
322 wrmsrl(HV_X64_MSR_REFERENCE_TSC, tsc_msr.as_uint64);
323
324 hyperv_cs_tsc.archdata.vclock_mode = VCLOCK_HVCLOCK;
325
326 clocksource_register_hz(&hyperv_cs_tsc, NSEC_PER_SEC/100);
327 return;
328 }
329 register_msr_cs:
330 #endif
331 /*
332 * For 32 bit guests just use the MSR based mechanism for reading
333 * the partition counter.
334 */
335
336 hyperv_cs = &hyperv_cs_msr;
337 if (ms_hyperv.features & HV_X64_MSR_TIME_REF_COUNT_AVAILABLE)
338 clocksource_register_hz(&hyperv_cs_msr, NSEC_PER_SEC/100);
339
340 return;
341
342 remove_cpuhp_state:
343 cpuhp_remove_state(cpuhp);
344 free_vp_assist_page:
345 kfree(hv_vp_assist_page);
346 hv_vp_assist_page = NULL;
347 free_vp_index:
348 kfree(hv_vp_index);
349 hv_vp_index = NULL;
350 }
351
---
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