When using Clang's Integrated Assembler (LLVM_IAS=1) we fell over
ClangBuiltLinux (CBL) issue #1043 where Jian Cai provided a fix.
With Jian's fix applied another issue raised up when CONFIG_HYPERV=m.
It turned out that the conversion of vectors to IDTENTRY_SYSVEC in
case of CONFIG_HYPERV was incomplete and fails with a build error:
<instantiation>:9:6: error: expected absolute expression
.if HYPERVISOR_REENLIGHTENMENT_VECTOR == 3
^
<instantiation>:1:1: note: while in macro instantiation
idtentry HYPERVISOR_REENLIGHTENMENT_VECTOR asm_sysvec_hyperv_reenlightenment
sysvec_hyperv_reenlightenment has_error_code=0
^
./arch/x86/include/asm/idtentry.h:627:1: note: while in macro instantiation
idtentry_sysvec HYPERVISOR_REENLIGHTENMENT_VECTOR sysvec_hyperv_reenlightenment;
^
<instantiation>:9:6: error: expected absolute expression
.if HYPERVISOR_STIMER0_VECTOR == 3
^
<instantiation>:1:1: note: while in macro instantiation
idtentry HYPERVISOR_STIMER0_VECTOR asm_sysvec_hyperv_stimer0
sysvec_hyperv_stimer0 has_error_code=0
^
./arch/x86/include/asm/idtentry.h:628:1: note: while in macro instantiation
idtentry_sysvec HYPERVISOR_STIMER0_VECTOR sysvec_hyperv_stimer0;
I and Nathan double-checked the hyperv(isor) vectors:
$ rg --no-heading "HYPERVISOR_REENLIGHTENMENT_VECTOR|HYPERVISOR_STIMER0_VECTOR"
$ rg --no-heading "HYPERV_REENLIGHTENMENT_VECTOR|HYPERV_STIMER0_VECTOR"
Fix these typos in arch/x86/include/asm/idtentry.h:
HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR -> HYPERV_STIMER0_VECTOR
For more details see CBL issue #1088.
With both fixes applied I was able to build/assemble with a snapshot
version of LLVM/Clang from Debian/experimental.
Cc: Jian Cai <caij2...@gmail.com>
Cc: clang-built-li...@googlegroups.com
Reviewed-by: Nathan Chancellor <natechancel...@gmail.com>
Fixes: a16be368dd3f ("x86/entry: Convert various hypervisor vectors to
IDTENTRY_SYSVEC")
Link: https://github.com/ClangBuiltLinux/linux/issues/1043
Link: https://github.com/ClangBuiltLinux/linux/issues/1088
Signed-off-by: Sedat Dilek <sedat.di...@gmail.com>
---
arch/x86/include/asm/idtentry.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h
index 513eb2ccbdbf..a811f6c6cf15 100644
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -624,8 +624,8 @@ DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_NESTED_VECTOR,
sysvec_kvm_posted_intr_nested
#if IS_ENABLED(CONFIG_HYPERV)
DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_CALLBACK_VECTOR, sysvec_hyperv_callback);
-DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_REENLIGHTENMENT_VECTOR,
sysvec_hyperv_reenlightenment);
-DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_STIMER0_VECTOR, sysvec_hyperv_stimer0);
+DECLARE_IDTENTRY_SYSVEC(HYPERV_REENLIGHTENMENT_VECTOR,
sysvec_hyperv_reenlightenment);
+DECLARE_IDTENTRY_SYSVEC(HYPERV_STIMER0_VECTOR, sysvec_hyperv_stimer0);
#endif
#if IS_ENABLED(CONFIG_ACRN_GUEST)
--
2.27.0
