tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: ae5179317e794160e471db0e122c6ac811a97235 commit: 6bda810ffe494a57e2da7f87b88b17f240f90cb9 [11131/11937] x86/hyperv: Add Write/Read MSR registers via ghcb page config: x86_64-randconfig-s022-20211027 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=6bda810ffe494a57e2da7f87b88b17f240f90cb9 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 6bda810ffe494a57e2da7f87b88b17f240f90cb9 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> arch/x86/hyperv/hv_init.c:70:30: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got union hv_ghcb [noderef] __percpu ** @@ arch/x86/hyperv/hv_init.c:70:30: sparse: expected void const [noderef] __percpu *__vpp_verify arch/x86/hyperv/hv_init.c:70:30: sparse: got union hv_ghcb [noderef] __percpu ** arch/x86/hyperv/hv_init.c:214:36: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got union hv_ghcb [noderef] __percpu ** @@ arch/x86/hyperv/hv_init.c:214:36: sparse: expected void const [noderef] __percpu *__vpp_verify arch/x86/hyperv/hv_init.c:214:36: sparse: got union hv_ghcb [noderef] __percpu ** arch/x86/hyperv/hv_init.c:363:24: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got void [noderef] __percpu ** @@ arch/x86/hyperv/hv_init.c:363:24: sparse: expected void const [noderef] __percpu *__vpp_verify arch/x86/hyperv/hv_init.c:363:24: sparse: got void [noderef] __percpu ** arch/x86/hyperv/hv_init.c:363:21: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct hv_get_partition_id *output_page @@ got void [noderef] __percpu * @@ arch/x86/hyperv/hv_init.c:363:21: sparse: expected struct hv_get_partition_id *output_page arch/x86/hyperv/hv_init.c:363:21: sparse: got void [noderef] __percpu * >> arch/x86/hyperv/hv_init.c:409:28: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected union hv_ghcb [noderef] __percpu **[addressable] [toplevel] hv_ghcb_pg @@ got union hv_ghcb *[noderef] __percpu * @@ arch/x86/hyperv/hv_init.c:409:28: sparse: expected union hv_ghcb [noderef] __percpu **[addressable] [toplevel] hv_ghcb_pg arch/x86/hyperv/hv_init.c:409:28: sparse: got union hv_ghcb *[noderef] __percpu * >> arch/x86/hyperv/hv_init.c:510:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __percpu *__pdata @@ got union hv_ghcb [noderef] __percpu **[addressable] [toplevel] hv_ghcb_pg @@ arch/x86/hyperv/hv_init.c:510:21: sparse: expected void [noderef] __percpu *__pdata arch/x86/hyperv/hv_init.c:510:21: sparse: got union hv_ghcb [noderef] __percpu **[addressable] [toplevel] hv_ghcb_pg vim +70 arch/x86/hyperv/hv_init.c a46d15cc1ae5af Vitaly Kuznetsov 2018-03-20 47 e8883fe544e86b Tianyu Lan 2021-10-25 48 static int hyperv_init_ghcb(void) e8883fe544e86b Tianyu Lan 2021-10-25 49 { e8883fe544e86b Tianyu Lan 2021-10-25 50 u64 ghcb_gpa; e8883fe544e86b Tianyu Lan 2021-10-25 51 void *ghcb_va; e8883fe544e86b Tianyu Lan 2021-10-25 52 void **ghcb_base; e8883fe544e86b Tianyu Lan 2021-10-25 53 e8883fe544e86b Tianyu Lan 2021-10-25 54 if (!hv_isolation_type_snp()) e8883fe544e86b Tianyu Lan 2021-10-25 55 return 0; e8883fe544e86b Tianyu Lan 2021-10-25 56 e8883fe544e86b Tianyu Lan 2021-10-25 57 if (!hv_ghcb_pg) e8883fe544e86b Tianyu Lan 2021-10-25 58 return -EINVAL; e8883fe544e86b Tianyu Lan 2021-10-25 59 e8883fe544e86b Tianyu Lan 2021-10-25 60 /* e8883fe544e86b Tianyu Lan 2021-10-25 61 * GHCB page is allocated by paravisor. The address e8883fe544e86b Tianyu Lan 2021-10-25 62 * returned by MSR_AMD64_SEV_ES_GHCB is above shared e8883fe544e86b Tianyu Lan 2021-10-25 63 * memory boundary and map it here. e8883fe544e86b Tianyu Lan 2021-10-25 64 */ e8883fe544e86b Tianyu Lan 2021-10-25 65 rdmsrl(MSR_AMD64_SEV_ES_GHCB, ghcb_gpa); e8883fe544e86b Tianyu Lan 2021-10-25 66 ghcb_va = memremap(ghcb_gpa, HV_HYP_PAGE_SIZE, MEMREMAP_WB); e8883fe544e86b Tianyu Lan 2021-10-25 67 if (!ghcb_va) e8883fe544e86b Tianyu Lan 2021-10-25 68 return -ENOMEM; e8883fe544e86b Tianyu Lan 2021-10-25 69 e8883fe544e86b Tianyu Lan 2021-10-25 @70 ghcb_base = (void **)this_cpu_ptr(hv_ghcb_pg); e8883fe544e86b Tianyu Lan 2021-10-25 71 *ghcb_base = ghcb_va; e8883fe544e86b Tianyu Lan 2021-10-25 72 e8883fe544e86b Tianyu Lan 2021-10-25 73 return 0; e8883fe544e86b Tianyu Lan 2021-10-25 74 } e8883fe544e86b Tianyu Lan 2021-10-25 75 :::::: The code at line 70 was first introduced by commit :::::: e8883fe544e86bcbd3b7147d05c822a5e26f1d99 x86/hyperv: Initialize GHCB page in Isolation VM :::::: TO: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx> :::::: CC: Wei Liu <wei.liu@xxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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