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SubjectRe: [PATCH v11 7/9] KVM: X86: Add userspace access interface for CET MSRs
Hi Yang,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on kvm/linux-next]
[also build test ERROR on next-20200327]
[cannot apply to vhost/linux-next tip/auto-latest linus/master linux/master v5.6-rc7]
[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/Yang-Weijiang/Introduce-support-for-guest-CET-feature/20200327-040801
base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
config: x86_64-randconfig-g001-20200327 (attached as .config)
compiler: gcc-7 (Debian 7.5.0-5) 7.5.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

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

All errors (new ones prefixed by >>):

arch/x86/kvm/x86.c: In function 'kvm_set_cr0':
arch/x86/kvm/x86.c:809:53: error: 'X86_CR4_CET' undeclared (first use in this function); did you mean 'X86_CR4_DE'?
if (!(cr0 & X86_CR0_WP) && kvm_read_cr4_bits(vcpu, X86_CR4_CET))
^~~~~~~~~~~
X86_CR4_DE
arch/x86/kvm/x86.c:809:53: note: each undeclared identifier is reported only once for each function it appears in
arch/x86/kvm/x86.c: At top level:
arch/x86/kvm/x86.c:1233:16: error: 'MSR_IA32_U_CET' undeclared here (not in a function); did you mean 'MSR_IA32_TSC'?
MSR_IA32_XSS, MSR_IA32_U_CET, MSR_IA32_S_CET,
^~~~~~~~~~~~~~
MSR_IA32_TSC
arch/x86/kvm/x86.c:1233:32: error: 'MSR_IA32_S_CET' undeclared here (not in a function); did you mean 'MSR_IA32_U_CET'?
MSR_IA32_XSS, MSR_IA32_U_CET, MSR_IA32_S_CET,
^~~~~~~~~~~~~~
MSR_IA32_U_CET
arch/x86/kvm/x86.c:1234:2: error: 'MSR_IA32_PL0_SSP' undeclared here (not in a function); did you mean 'MSR_IA32_MCG_ESP'?
MSR_IA32_PL0_SSP, MSR_IA32_PL1_SSP, MSR_IA32_PL2_SSP,
^~~~~~~~~~~~~~~~
MSR_IA32_MCG_ESP
arch/x86/kvm/x86.c:1234:20: error: 'MSR_IA32_PL1_SSP' undeclared here (not in a function); did you mean 'MSR_IA32_PL0_SSP'?
MSR_IA32_PL0_SSP, MSR_IA32_PL1_SSP, MSR_IA32_PL2_SSP,
^~~~~~~~~~~~~~~~
MSR_IA32_PL0_SSP
arch/x86/kvm/x86.c:1234:38: error: 'MSR_IA32_PL2_SSP' undeclared here (not in a function); did you mean 'MSR_IA32_PL1_SSP'?
MSR_IA32_PL0_SSP, MSR_IA32_PL1_SSP, MSR_IA32_PL2_SSP,
^~~~~~~~~~~~~~~~
MSR_IA32_PL1_SSP
arch/x86/kvm/x86.c:1235:2: error: 'MSR_IA32_PL3_SSP' undeclared here (not in a function); did you mean 'MSR_IA32_PL2_SSP'?
MSR_IA32_PL3_SSP, MSR_IA32_INT_SSP_TAB,
^~~~~~~~~~~~~~~~
MSR_IA32_PL2_SSP
>> arch/x86/kvm/x86.c:1235:20: error: 'MSR_IA32_INT_SSP_TAB' undeclared here (not in a function); did you mean 'MSR_IA32_PL3_SSP'?
MSR_IA32_PL3_SSP, MSR_IA32_INT_SSP_TAB,
^~~~~~~~~~~~~~~~~~~~
MSR_IA32_PL3_SSP
arch/x86/kvm/x86.c: In function 'is_xsaves_msr':
arch/x86/kvm/x86.c:3267:15: error: comparison between pointer and integer [-Werror]
return index == MSR_IA32_U_CET ||
^~
arch/x86/kvm/x86.c:3268:16: error: comparison between pointer and integer [-Werror]
(index >= MSR_IA32_PL0_SSP && index <= MSR_IA32_PL3_SSP);
^~
arch/x86/kvm/x86.c:3268:45: error: comparison between pointer and integer [-Werror]
(index >= MSR_IA32_PL0_SSP && index <= MSR_IA32_PL3_SSP);
^~
arch/x86/kvm/x86.c: In function 'kvm_arch_hardware_setup':
arch/x86/kvm/x86.c:191:28: error: 'XFEATURE_MASK_CET_USER' undeclared (first use in this function); did you mean 'XFEATURE_MASK_BNDCSR'?
#define KVM_SUPPORTED_XSS (XFEATURE_MASK_CET_USER | \
^
arch/x86/kvm/x86.c:9678:30: note: in expansion of macro 'KVM_SUPPORTED_XSS'
supported_xss = host_xss & KVM_SUPPORTED_XSS;
^~~~~~~~~~~~~~~~~
arch/x86/kvm/x86.c:192:6: error: 'XFEATURE_MASK_CET_KERNEL' undeclared (first use in this function); did you mean 'XFEATURE_MASK_CET_USER'?
XFEATURE_MASK_CET_KERNEL)
^
arch/x86/kvm/x86.c:9678:30: note: in expansion of macro 'KVM_SUPPORTED_XSS'
supported_xss = host_xss & KVM_SUPPORTED_XSS;
^~~~~~~~~~~~~~~~~
arch/x86/kvm/x86.c:191:51: error: invalid operands to binary | (have 'const u32 * {aka const unsigned int *}' and 'const u32 * {aka const unsigned int *}')
#define KVM_SUPPORTED_XSS (XFEATURE_MASK_CET_USER | \
~ ^
arch/x86/kvm/x86.c:9678:30: note: in expansion of macro 'KVM_SUPPORTED_XSS'
supported_xss = host_xss & KVM_SUPPORTED_XSS;
^~~~~~~~~~~~~~~~~
arch/x86/kvm/x86.c:9678:28: error: invalid operands to binary & (have 'u64 {aka long long unsigned int}' and 'const u32 * {aka const unsigned int *}')
supported_xss = host_xss & KVM_SUPPORTED_XSS;
^
arch/x86/kvm/x86.c:9678:17: error: assignment makes integer from pointer without a cast [-Werror=int-conversion]
supported_xss = host_xss & KVM_SUPPORTED_XSS;
^
cc1: all warnings being treated as errors

vim +1235 arch/x86/kvm/x86.c

1180
1181 /*
1182 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
1183 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
1184 *
1185 * The three MSR lists(msrs_to_save, emulated_msrs, msr_based_features)
1186 * extract the supported MSRs from the related const lists.
1187 * msrs_to_save is selected from the msrs_to_save_all to reflect the
1188 * capabilities of the host cpu. This capabilities test skips MSRs that are
1189 * kvm-specific. Those are put in emulated_msrs_all; filtering of emulated_msrs
1190 * may depend on host virtualization features rather than host cpu features.
1191 */
1192
1193 static const u32 msrs_to_save_all[] = {
1194 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
1195 MSR_STAR,
1196 #ifdef CONFIG_X86_64
1197 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
1198 #endif
1199 MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA,
1200 MSR_IA32_FEAT_CTL, MSR_IA32_BNDCFGS, MSR_TSC_AUX,
1201 MSR_IA32_SPEC_CTRL,
1202 MSR_IA32_RTIT_CTL, MSR_IA32_RTIT_STATUS, MSR_IA32_RTIT_CR3_MATCH,
1203 MSR_IA32_RTIT_OUTPUT_BASE, MSR_IA32_RTIT_OUTPUT_MASK,
1204 MSR_IA32_RTIT_ADDR0_A, MSR_IA32_RTIT_ADDR0_B,
1205 MSR_IA32_RTIT_ADDR1_A, MSR_IA32_RTIT_ADDR1_B,
1206 MSR_IA32_RTIT_ADDR2_A, MSR_IA32_RTIT_ADDR2_B,
1207 MSR_IA32_RTIT_ADDR3_A, MSR_IA32_RTIT_ADDR3_B,
1208 MSR_IA32_UMWAIT_CONTROL,
1209
1210 MSR_ARCH_PERFMON_FIXED_CTR0, MSR_ARCH_PERFMON_FIXED_CTR1,
1211 MSR_ARCH_PERFMON_FIXED_CTR0 + 2, MSR_ARCH_PERFMON_FIXED_CTR0 + 3,
1212 MSR_CORE_PERF_FIXED_CTR_CTRL, MSR_CORE_PERF_GLOBAL_STATUS,
1213 MSR_CORE_PERF_GLOBAL_CTRL, MSR_CORE_PERF_GLOBAL_OVF_CTRL,
1214 MSR_ARCH_PERFMON_PERFCTR0, MSR_ARCH_PERFMON_PERFCTR1,
1215 MSR_ARCH_PERFMON_PERFCTR0 + 2, MSR_ARCH_PERFMON_PERFCTR0 + 3,
1216 MSR_ARCH_PERFMON_PERFCTR0 + 4, MSR_ARCH_PERFMON_PERFCTR0 + 5,
1217 MSR_ARCH_PERFMON_PERFCTR0 + 6, MSR_ARCH_PERFMON_PERFCTR0 + 7,
1218 MSR_ARCH_PERFMON_PERFCTR0 + 8, MSR_ARCH_PERFMON_PERFCTR0 + 9,
1219 MSR_ARCH_PERFMON_PERFCTR0 + 10, MSR_ARCH_PERFMON_PERFCTR0 + 11,
1220 MSR_ARCH_PERFMON_PERFCTR0 + 12, MSR_ARCH_PERFMON_PERFCTR0 + 13,
1221 MSR_ARCH_PERFMON_PERFCTR0 + 14, MSR_ARCH_PERFMON_PERFCTR0 + 15,
1222 MSR_ARCH_PERFMON_PERFCTR0 + 16, MSR_ARCH_PERFMON_PERFCTR0 + 17,
1223 MSR_ARCH_PERFMON_EVENTSEL0, MSR_ARCH_PERFMON_EVENTSEL1,
1224 MSR_ARCH_PERFMON_EVENTSEL0 + 2, MSR_ARCH_PERFMON_EVENTSEL0 + 3,
1225 MSR_ARCH_PERFMON_EVENTSEL0 + 4, MSR_ARCH_PERFMON_EVENTSEL0 + 5,
1226 MSR_ARCH_PERFMON_EVENTSEL0 + 6, MSR_ARCH_PERFMON_EVENTSEL0 + 7,
1227 MSR_ARCH_PERFMON_EVENTSEL0 + 8, MSR_ARCH_PERFMON_EVENTSEL0 + 9,
1228 MSR_ARCH_PERFMON_EVENTSEL0 + 10, MSR_ARCH_PERFMON_EVENTSEL0 + 11,
1229 MSR_ARCH_PERFMON_EVENTSEL0 + 12, MSR_ARCH_PERFMON_EVENTSEL0 + 13,
1230 MSR_ARCH_PERFMON_EVENTSEL0 + 14, MSR_ARCH_PERFMON_EVENTSEL0 + 15,
1231 MSR_ARCH_PERFMON_EVENTSEL0 + 16, MSR_ARCH_PERFMON_EVENTSEL0 + 17,
1232
1233 MSR_IA32_XSS, MSR_IA32_U_CET, MSR_IA32_S_CET,
1234 MSR_IA32_PL0_SSP, MSR_IA32_PL1_SSP, MSR_IA32_PL2_SSP,
> 1235 MSR_IA32_PL3_SSP, MSR_IA32_INT_SSP_TAB,
1236 };
1237

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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