iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: selftests: Fix KVM_EXCEPTION_MAGIC build with Clang

Browse Source 
Change KVM_EXCEPTION_MAGIC to use the all-caps "ULL", rather than lower
case. This fixes a build failure with Clang:

  In file included from x86_64/hyperv_features.c:13:
  include/x86_64/processor.h:825:9: error: unexpected token in argument list
          return kvm_asm_safe("wrmsr", "a"(val & -1u), "d"(val >> 32), "c"(msr));
                 ^
  include/x86_64/processor.h:802:15: note: expanded from macro 'kvm_asm_safe'
          asm volatile(KVM_ASM_SAFE(insn)                 \
                       ^
  include/x86_64/processor.h:785:2: note: expanded from macro 'KVM_ASM_SAFE'
          "mov $" __stringify(KVM_EXCEPTION_MAGIC) ", %%r9\n\t"   \
          ^
  <inline asm>:1:18: note: instantiated into assembly here
          mov $0xabacadabaull, %r9
                          ^

Fixes: 3b23054cd3f5 ("KVM: selftests: Add x86-64 support for exception fixup")
Signed-off-by: David Matlack <dmatlack@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220722234838.2160385-2-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
David Matlack 2022-07-22 23:48:37 +00:00 committed by Paolo Bonzini
parent 020dac4187
commit 67ef8664cc
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/testing/selftests/kvm/include/x86_64/processor.h
View File

@ -754,7 +754,7 @@ void vm_install_exception_handler(struct kvm_vm *vm, int vector,
void (*handler)(struct ex_regs *));
/* If a toddler were to say "abracadabra". */
#define KVM_EXCEPTION_MAGIC 0xabacadabaull
#define KVM_EXCEPTION_MAGIC 0xabacadabaULL
/*
* KVM selftest exception fixup uses registers to coordinate with the exception