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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2020-04-20 11:17:37 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-20 17:11:19 -0400 |
| commit | 7f4b5cde24094127ace370c3c6b82fef65d9f71f (patch) | |
| tree | 3cca238e30286de592b2cde5cb19251744c9319b | |
| parent | 2ca1a06a5440ae8aa7bb0709336d759395b7bbb8 (diff) | |
| download | linux-7f4b5cde24094127ace370c3c6b82fef65d9f71f.tar.gz linux-7f4b5cde24094127ace370c3c6b82fef65d9f71f.tar.bz2 linux-7f4b5cde24094127ace370c3c6b82fef65d9f71f.zip | |
kvm: Disable objtool frame pointer checking for vmenter.S
Frame pointers are completely broken by vmenter.S because it clobbers
RBP:
arch/x86/kvm/svm/vmenter.o: warning: objtool: __svm_vcpu_run()+0xe4: BP used as a scratch register
That's unavoidable, so just skip checking that file when frame pointers
are configured in.
On the other hand, ORC can handle that code just fine, so leave objtool
enabled in the !FRAME_POINTER case.
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Message-Id: <01fae42917bacad18be8d2cbc771353da6603473.1587398610.git.jpoimboe@redhat.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Fixes: 199cd1d7b534 ("KVM: SVM: Split svm_vcpu_run inline assembly to separate file")
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/Makefile | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile index a789759b7261..4a3081e9f4b5 100644 --- a/arch/x86/kvm/Makefile +++ b/arch/x86/kvm/Makefile @@ -3,6 +3,10 @@ ccflags-y += -Iarch/x86/kvm ccflags-$(CONFIG_KVM_WERROR) += -Werror +ifeq ($(CONFIG_FRAME_POINTER),y) +OBJECT_FILES_NON_STANDARD_vmenter.o := y +endif + KVM := ../../../virt/kvm kvm-y += $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o \ |