tree: https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue head: 88147147d55cd3cd2ad8a7c9342d6c07c12405a6 commit: 455f536d6e80b5e31c477cb42af24374604fd80d [1/3] x86,kvm: Teach KVM's VMX code that CR3 isn't a constant config: i386-tinyconfig (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: git checkout 455f536d6e80b5e31c477cb42af24374604fd80d # save the attached .config to linux build tree make ARCH=i386 All error/warnings (new ones prefixed by >>): In file included from arch/x86/include/asm/page.h:13:0, from arch/x86/include/asm/thread_info.h:11, from include/linux/thread_info.h:37, from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:80, from include/linux/spinlock.h:50, from include/linux/rcupdate.h:38, from include/linux/rculist.h:10, from include/linux/pid.h:4, from include/linux/sched.h:13, from kernel///sched/core.c:8: arch/x86/include/asm/mmu_context.h: In function '__get_current_cr3_fast': >> arch/x86/include/asm/mmu_context.h:281:53: error: 'struct tlb_state' has no member named 'loaded_mm' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^ arch/x86/include/asm/page_32.h:8:34: note: in definition of macro '__phys_addr_nodebug' #define __phys_addr_nodebug(x) ((x) - PAGE_OFFSET) ^ >> arch/x86/include/asm/page.h:41:18: note: in expansion of macro '__phys_addr' #define __pa(x) __phys_addr((unsigned long)(x)) ^~~~~~~~~~~ >> arch/x86/include/asm/mmu_context.h:281:22: note: in expansion of macro '__pa' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^~~~ >> include/linux/percpu-defs.h:494:29: note: in expansion of macro '__pcpu_size_call_return' #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp) ^~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/include/asm/mmu_context.h:281:27: note: in expansion of macro 'this_cpu_read' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^~~~~~~~~~~~~ >> arch/x86/include/asm/mmu_context.h:281:53: error: 'struct tlb_state' has no member named 'loaded_mm' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^ arch/x86/include/asm/page_32.h:8:34: note: in definition of macro '__phys_addr_nodebug' #define __phys_addr_nodebug(x) ((x) - PAGE_OFFSET) ^ >> arch/x86/include/asm/page.h:41:18: note: in expansion of macro '__phys_addr' #define __pa(x) __phys_addr((unsigned long)(x)) ^~~~~~~~~~~ >> arch/x86/include/asm/mmu_context.h:281:22: note: in expansion of macro '__pa' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^~~~ >> include/linux/percpu-defs.h:306:2: note: in expansion of macro '__verify_pcpu_ptr' __verify_pcpu_ptr(&(variable)); \ ^~~~~~~~~~~~~~~~~ >> include/linux/percpu-defs.h:494:29: note: in expansion of macro '__pcpu_size_call_return' #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp) ^~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/include/asm/mmu_context.h:281:27: note: in expansion of macro 'this_cpu_read' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^~~~~~~~~~~~~ >> arch/x86/include/asm/mmu_context.h:281:53: error: 'struct tlb_state' has no member named 'loaded_mm' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^ arch/x86/include/asm/page_32.h:8:34: note: in definition of macro '__phys_addr_nodebug' #define __phys_addr_nodebug(x) ((x) - PAGE_OFFSET) ^ >> arch/x86/include/asm/page.h:41:18: note: in expansion of macro '__phys_addr' #define __pa(x) __phys_addr((unsigned long)(x)) ^~~~~~~~~~~ >> arch/x86/include/asm/mmu_context.h:281:22: note: in expansion of macro '__pa' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^~~~ >> include/linux/percpu-defs.h:494:29: note: in expansion of macro '__pcpu_size_call_return' #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp) ^~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/include/asm/mmu_context.h:281:27: note: in expansion of macro 'this_cpu_read' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^~~~~~~~~~~~~ >> arch/x86/include/asm/mmu_context.h:281:53: error: 'struct tlb_state' has no member named 'loaded_mm' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^ arch/x86/include/asm/page_32.h:8:34: note: in definition of macro '__phys_addr_nodebug' #define __phys_addr_nodebug(x) ((x) - PAGE_OFFSET) ^ >> arch/x86/include/asm/page.h:41:18: note: in expansion of macro '__phys_addr' #define __pa(x) __phys_addr((unsigned long)(x)) ^~~~~~~~~~~ >> arch/x86/include/asm/mmu_context.h:281:22: note: in expansion of macro '__pa' unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); ^~~~ >> arch/x86/include/asm/percpu.h:413:31: note: in expansion of macro 'percpu_from_op' #define this_cpu_read_1(pcp) percpu_from_op("mov", pcp) ^~~~~~~~~~~~~~ vim +281 arch/x86/include/asm/mmu_context.h 275 * 276 * It's intended to be used for code like KVM that sneakily changes CR3 277 * and needs to restore it. It needs to be used very carefully. 278 */ 279 static inline unsigned long __get_current_cr3_fast(void) 280 { > 281 unsigned long cr3 = __pa(this_cpu_read(cpu_tlbstate.loaded_mm)->pgd); 282 283 /* For now, be very restrictive about when this can be called. */ 284 VM_WARN_ON(in_nmi() || !in_atomic()); --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
Attachment:
.config.gz
Description: application/gzip
