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x86/idtentry: Error when CONFIG_HYPERV is set with LLVM_IAS=1 #1088

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dileks opened this issue Jul 12, 2020 · 9 comments
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x86/idtentry: Error when CONFIG_HYPERV is set with LLVM_IAS=1 #1088

dileks opened this issue Jul 12, 2020 · 9 comments
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@dileks
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[ARCH] x86_64 This bug impacts ARCH=x86_64 [FIXED][LINUX] 5.8 This bug was fixed in Linux 5.8 [TOOL] integrated-as The issue is relevant to LLVM integrated assembler

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@dileks
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dileks commented Jul 12, 2020 •
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With @jcai19 diff from #1043 (comment) applied and CONFIG_HYPERV=m I see with Linux v5.8-rc4 and LLVM_IAS=1 (here: Debian/testing AMD64):

  clang-11 -Wp,-MMD,arch/x86/entry/.entry_64.o.d -nostdinc -isystem /usr/lib/llvm-11/lib/clang/11.0.0/include -I./arch/x86/include -I./arch/x86/include/generated  -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -Qunused-arguments -D__ASSEMBLY__ -fno-PIE -Werror=unknown-warning-option -m64 -Wa,-gdwarf-4 -gz=zlib -DCC_USING_FENTRY    -c -o arch/x86/entry/entry_64.o arch/x86/entry/entry_64.S
...
<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;
^
make[5]: *** [scripts/Makefile.build:361: arch/x86/entry/entry_64.o] Error 1
make[4]: *** [scripts/Makefile.build:497: arch/x86/entry] Error 2
make[3]: *** [Makefile:1762: arch/x86] Error 2

Check arch/x86/include/asm/idtentry.h:

Line #625: #if IS_ENABLED(CONFIG_HYPERV)
Line #626: DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_CALLBACK_VECTOR,	sysvec_hyperv_callback);
Line #627: DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_REENLIGHTENMENT_VECTOR,	sysvec_hyperv_reenlightenment);
Line #628: DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_STIMER0_VECTOR,	sysvec_hyperv_stimer0);
Line #629: #endif
  1. Workaround: Use -no-integrated-as (see invalid reassignment of non-absolute variable 'pos' #1043 (comment))
  2. Workaround: CONFIG_HYPERV=n

As @jcai19 points out this is a different issue to #1043.
@dileks dileks added [TOOL] integrated-as The issue is relevant to LLVM integrated assembler [ARCH] x86_64 This bug impacts ARCH=x86_64 labels Jul 12, 2020
@dileks dileks mentioned this issue Jul 12, 2020
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@dileks
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dileks commented Jul 12, 2020 •
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Typos :-):

$ git diff arch/x86/include/asm/idtentry.h
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)

With that diff I am able to build with CONFIG_HYPERV=m:

  clang-11 -Wp,-MMD,arch/x86/entry/.entry_64.o.d -nostdinc -isystem /usr/lib/llvm-11/lib/clang/11.0.0/include -I./arch/x86/include -I./arch/x86/include/generated  -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -Qunused-arguments -D__ASSEMBLY__ -fno-PIE -Werror=unknown-warning-option -m64 -Wa,-gdwarf-4 -gz=zlib -DCC_USING_FENTRY    -c -o arch/x86/entry/entry_64.o arch/x86/entry/entry_64.S
   ./tools/objtool/objtool orc generate  --no-fp --retpoline --uaccess arch/x86/entry/entry_64.o
  if llvm-objdump-11 -h arch/x86/entry/entry_64.o | grep -q __ksymtab; then { echo "#include <linux/kernel.h>" ; echo "#include <asm/asm-prototypes.h>" ; clang-11 -E -Wp,-MMD,arch/x86/entry/.entry_64.o.d -nostdinc -isystem /usr/lib/llvm-11/lib/clang/11.0.0/include -I./arch/x86/include -I./arch/x86/include/generated  -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -Qunused-arguments -D__ASSEMBLY__ -fno-PIE -Werror=unknown-warning-option -m64 -Wa,-gdwarf-4 -gz=zlib -DCC_USING_FENTRY    arch/x86/entry/entry_64.S | grep "\<___EXPORT_SYMBOL\>" | sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL();/' ; } | clang-11 -E -D__GENKSYMS__ -Wp,-MMD,arch/x86/entry/.entry_64.o.d -nostdinc -isystem /usr/lib/llvm-11/lib/clang/11.0.0/include -I./arch/x86/include -I./arch/x86/include/generated  -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -Qunused-arguments -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -Werror=unknown-warning-option -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -mno-80387 -mstack-alignment=8 -mtune=generic -mno-red-zone -mcmodel=kernel -Wno-sign-compare -fno-asynchronous-unwind-tables -mretpoline-external-thunk -fno-delete-null-pointer-checks -Wno-frame-address -Wno-address-of-packed-member -O2 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-format-invalid-specifier -Wno-gnu -mno-global-merge -Wno-unused-const-variable -g -gdwarf-4 -gz=zlib -pg -mfentry -DCC_USING_FENTRY -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-array-bounds -fno-strict-overflow -fno-merge-all-constants -fno-stack-check -Werror=date-time -Werror=incompatible-pointer-types -fmacro-prefix-map=./= -fcf-protection=none -Wno-initializer-overrides -Wno-format -Wno-sign-compare -Wno-format-zero-length -Wno-pointer-to-enum-cast -Wno-tautological-constant-out-of-range-compare    -DKBUILD_MODFILE='"arch/x86/entry/entry_64"' -DKBUILD_BASENAME='"entry_64"' -DKBUILD_MODNAME='"entry_64"' -xc - | scripts/genksyms/genksyms    -r /dev/null > arch/x86/entry/.tmp_entry_64.ver; ld.lld-11 -m elf_x86_64  -z max-page-size=0x200000 --compress-debug-sections=zlib -r -o arch/x86/entry/.tmp_entry_64.o arch/x86/entry/entry_64.o -T arch/x86/entry/.tmp_entry_64.ver; mv -f arch/x86/entry/.tmp_entry_64.o arch/x86/entry/entry_64.o; rm -f arch/x86/entry/.tmp_entry_64.ver; fi

$ ll arch/x86/entry/entry_64.o
-rw-r--r-- 1 dileks dileks 84K 12. Jul 19:09 arch/x86/entry/entry_64.o

$ llvm-dwarfdump-11 arch/x86/entry/entry_64.o
arch/x86/entry/entry_64.o:      file format elf64-x86-64

.debug_info contents:
0x00000000: Compile Unit: length = 0x00000cc3, format = DWARF32, version = 0x0004, abbr_offset = 0x0000, addr_size = 0x08 (next unit at 0x00000cc7)

0x0000000b: DW_TAG_compile_unit
              DW_AT_stmt_list   (0x00000000)
              DW_AT_ranges      (0x00000000
                 [0x0000000000000000, 0x00000000000000b7)
                 [0x0000000000000000, 0x00000000000014ff)
                 [0x0000000000000000, 0x00000000000000d5)
                 [0x0000000000000000, 0x0000000000000013))
              DW_AT_name        ("arch/x86/entry/entry_64.S")
              DW_AT_comp_dir    ("/home/dileks/src/linux-kernel/git")
              DW_AT_producer    ("Debian clang version 11.0.0-++20200701093119+ffee8040534-1~exp1 ")
              DW_AT_language    (DW_LANG_Mips_Assembler)

@nathanchance
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Good catch! That should be sent upstream ASAP so that it can make it into 5.8 final.

$ rg --no-heading "HYPERVISOR_REENLIGHTENMENT_VECTOR|HYPERVISOR_STIMER0_VECTOR"
arch/x86/include/asm/idtentry.h:629:DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_REENLIGHTENMENT_VECTOR,  sysvec_hyperv_reenlightenment);
arch/x86/include/asm/idtentry.h:630:DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_STIMER0_VECTOR,  sysvec_hyperv_stimer0);

$ rg --no-heading "HYPERV_REENLIGHTENMENT_VECTOR|HYPERV_STIMER0_VECTOR"
tools/arch/x86/include/asm/irq_vectors.h:103:#define HYPERV_REENLIGHTENMENT_VECTOR      0xee
tools/arch/x86/include/asm/irq_vectors.h:104:#define HYPERV_STIMER0_VECTOR              0xed
arch/x86/kernel/irq.c:147:      if (test_bit(HYPERV_REENLIGHTENMENT_VECTOR, system_vectors)) {
arch/x86/kernel/irq.c:154:      if (test_bit(HYPERV_STIMER0_VECTOR, system_vectors)) {
arch/x86/kernel/cpu/mshyperv.c:82:      add_interrupt_randomness(HYPERV_STIMER0_VECTOR, 0);
arch/x86/kernel/cpu/mshyperv.c:90:      *vector = HYPERV_STIMER0_VECTOR;
arch/x86/kernel/cpu/mshyperv.c:334:             alloc_intr_gate(HYPERV_REENLIGHTENMENT_VECTOR,
arch/x86/kernel/cpu/mshyperv.c:340:             alloc_intr_gate(HYPERV_STIMER0_VECTOR,
arch/x86/hyperv/hv_init.c:166:          .vector = HYPERV_REENLIGHTENMENT_VECTOR,
arch/x86/include/asm/irq_vectors.h:103:#define HYPERV_REENLIGHTENMENT_VECTOR    0xee
arch/x86/include/asm/irq_vectors.h:104:#define HYPERV_STIMER0_VECTOR            0xed

Feel free to stick Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> on the patch.

@dileks
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dileks commented Jul 12, 2020

I was able to build and boot on bare metal.

Thanks @nathanchance for the review.

@dileks dileks mentioned this issue Jul 12, 2020
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dileks commented Jul 12, 2020

Patch sent upstream.

[1] https://lore.kernel.org/patchwork/patch/1271438/
[2] https://lore.kernel.org/lkml/20200712231050.5147-1-sedat.dilek@gmail.com/

@dileks dileks added the [PATCH] Submitted A patch has been submitted for review label Jul 12, 2020
nathanchance pushed a commit to nathanchance/WSL2-Linux-Kernel that referenced this issue Jul 14, 2020
@dileks @nathanchance
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
57f5492 
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.

Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Cc: Jian Cai <caij2003@gmail.com>
Cc: clang-built-linux@googlegroups.com
Link: ClangBuiltLinux/linux#1043
Link: ClangBuiltLinux/linux#1088
Link: https://lore.kernel.org/lkml/20200712231050.5147-1-sedat.dilek@gmail.com/
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
@dileks
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dileks commented Jul 14, 2020

Submitted a v2.

[1] https://lore.kernel.org/patchwork/patch/1272393/
[2] https://lore.kernel.org/lkml/20200714111103.14591-1-sedat.dilek@gmail.com/

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dileks commented Jul 14, 2020 •
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Submitted v3.

[1] https://lore.kernel.org/patchwork/patch/1273010/

fengguang pushed a commit to 0day-ci/linux that referenced this issue Jul 14, 2020
@dileks @intel-lab-lkp
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
46fadfa 
When using Clang's Integrated Assembler (LLVM_IAS=1) we fell over
ClangBuiltLinux (CBL) issue #1043 where Jian Cai provided a patch.

With Jian's patch 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.

NOTE: My patch is independent from Jian's patch and should be applied separately.

Cc: Jian Cai <caij2003@gmail.com>
Cc: clang-built-linux@googlegroups.com
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Link: ClangBuiltLinux#1043
Link: https://lore.kernel.org/patchwork/patch/1272115/
Link: ClangBuiltLinux#1088
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
fengguang pushed a commit to 0day-ci/linux that referenced this issue Jul 14, 2020
@dileks @intel-lab-lkp
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
b3e50ee 
When assembling with Clang via `make LLVM_IAS=1` and CONFIG_HYPERV enabled,
we observe the following 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;

This is caused by typos in arch/x86/include/asm/idtentry.h:

HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR         -> HYPERV_STIMER0_VECTOR

For more details see ClangBuiltLinux issue #1088.

Cc: Jian Cai <caij2003@gmail.com>
Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Link: ClangBuiltLinux#1088
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
fengguang pushed a commit to 0day-ci/linux that referenced this issue Jul 14, 2020
@dileks @intel-lab-lkp
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
c56e192 
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 <caij2003@gmail.com>
Cc: clang-built-linux@googlegroups.com
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Link: ClangBuiltLinux#1043
Link: ClangBuiltLinux#1088
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
nathanchance pushed a commit to nathanchance/WSL2-Linux-Kernel that referenced this issue Jul 16, 2020
@dileks @nathanchance
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
ba185bf 
When assembling with Clang via `make LLVM_IAS=1` and CONFIG_HYPERV enabled,
we observe the following 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;

This is caused by typos in arch/x86/include/asm/idtentry.h:

HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR         -> HYPERV_STIMER0_VECTOR

For more details see ClangBuiltLinux issue #1088.

Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: Jian Cai <caij2003@gmail.com>
Link: ClangBuiltLinux/linux#1088
Link: https://lore.kernel.org/lkml/20200714194740.4548-1-sedat.dilek@gmail.com/
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
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accepted: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=5769fe26f389b0002ed48fd16d642a1d86edaf79

@nickdesaulniers nickdesaulniers added [PATCH] Accepted A submitted patch has been accepted upstream and removed [PATCH] Submitted A patch has been submitted for review labels Jul 16, 2020
@dileks
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dileks commented Jul 16, 2020

Cool and tglx included links to Jian's patch.

nathanchance pushed a commit to nathanchance/WSL2-Linux-Kernel that referenced this issue Jul 17, 2020
@dileks @nathanchance
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
a851daa 
When assembling with Clang via `make LLVM_IAS=1` and CONFIG_HYPERV enabled,
we observe the following 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;

This is caused by typos in arch/x86/include/asm/idtentry.h:

HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR         -> HYPERV_STIMER0_VECTOR

For more details see ClangBuiltLinux issue #1088.

Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: Jian Cai <caij2003@gmail.com>
Link: ClangBuiltLinux/linux#1088
Link: https://lore.kernel.org/lkml/20200714194740.4548-1-sedat.dilek@gmail.com/
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
hohoxu pushed a commit to hohoxu/n5kernel that referenced this issue Jul 18, 2020
@dileks @KAGA-KOKO
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
5769fe2 
When assembling with Clang via `make LLVM_IAS=1` and CONFIG_HYPERV enabled,
we observe the following 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;

This is caused by typos in arch/x86/include/asm/idtentry.h:

HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR         -> HYPERV_STIMER0_VECTOR

For more details see ClangBuiltLinux issue #1088.

Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: ClangBuiltLinux/linux#1088
Link: ClangBuiltLinux/linux#1043
Link: https://lore.kernel.org/patchwork/patch/1272115/
Link: https://lkml.kernel.org/r/20200714194740.4548-1-sedat.dilek@gmail.com
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dileks commented Jul 19, 2020

Accepted in Linus tree.

https://git.kernel.org/linus/5769fe26f389b0002ed48fd16d642a1d86edaf79

@dileks dileks added [FIXED][LINUX] 5.8 This bug was fixed in Linux 5.8 and removed [PATCH] Accepted A submitted patch has been accepted upstream labels Jul 19, 2020
9034725985 pushed a commit to continuousimprovement/linux-rc that referenced this issue Jul 20, 2020
@dileks @9034725985
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
1e056af 
When assembling with Clang via `make LLVM_IAS=1` and CONFIG_HYPERV enabled,
we observe the following 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;

This is caused by typos in arch/x86/include/asm/idtentry.h:

HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR         -> HYPERV_STIMER0_VECTOR

For more details see ClangBuiltLinux issue #1088.

Fixes: a16be368dd3f ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: ClangBuiltLinux/linux#1088
Link: ClangBuiltLinux/linux#1043
Link: https://lore.kernel.org/patchwork/patch/1272115/
Link: https://lkml.kernel.org/r/20200714194740.4548-1-sedat.dilek@gmail.com
fifteenhex pushed a commit to fifteenhex/linux that referenced this issue Jul 25, 2020
@dileks @fifteenhex
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
e6bc523 
When assembling with Clang via `make LLVM_IAS=1` and CONFIG_HYPERV enabled,
we observe the following 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;

This is caused by typos in arch/x86/include/asm/idtentry.h:

HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR         -> HYPERV_STIMER0_VECTOR

For more details see ClangBuiltLinux issue #1088.

Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: ClangBuiltLinux#1088
Link: ClangBuiltLinux#1043
Link: https://lore.kernel.org/patchwork/patch/1272115/
Link: https://lkml.kernel.org/r/20200714194740.4548-1-sedat.dilek@gmail.com
fifteenhex pushed a commit to fifteenhex/linux that referenced this issue Jul 28, 2020
@dileks @fifteenhex
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
e1c4f8d 
When assembling with Clang via `make LLVM_IAS=1` and CONFIG_HYPERV enabled,
we observe the following 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;

This is caused by typos in arch/x86/include/asm/idtentry.h:

HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR         -> HYPERV_STIMER0_VECTOR

For more details see ClangBuiltLinux issue #1088.

Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: ClangBuiltLinux#1088
Link: ClangBuiltLinux#1043
Link: https://lore.kernel.org/patchwork/patch/1272115/
Link: https://lkml.kernel.org/r/20200714194740.4548-1-sedat.dilek@gmail.com
fifteenhex pushed a commit to fifteenhex/linux that referenced this issue Jul 28, 2020
@dileks @fifteenhex
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
dcec42b 
When assembling with Clang via `make LLVM_IAS=1` and CONFIG_HYPERV enabled,
we observe the following 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;

This is caused by typos in arch/x86/include/asm/idtentry.h:

HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR         -> HYPERV_STIMER0_VECTOR

For more details see ClangBuiltLinux issue #1088.

Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: ClangBuiltLinux#1088
Link: ClangBuiltLinux#1043
Link: https://lore.kernel.org/patchwork/patch/1272115/
Link: https://lkml.kernel.org/r/20200714194740.4548-1-sedat.dilek@gmail.com
fifteenhex pushed a commit to fifteenhex/linux that referenced this issue Jul 29, 2020
@dileks @fifteenhex
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
3c7cb3c 
When assembling with Clang via `make LLVM_IAS=1` and CONFIG_HYPERV enabled,
we observe the following 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;

This is caused by typos in arch/x86/include/asm/idtentry.h:

HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR         -> HYPERV_STIMER0_VECTOR

For more details see ClangBuiltLinux issue #1088.

Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: ClangBuiltLinux#1088
Link: ClangBuiltLinux#1043
Link: https://lore.kernel.org/patchwork/patch/1272115/
Link: https://lkml.kernel.org/r/20200714194740.4548-1-sedat.dilek@gmail.com
fifteenhex pushed a commit to fifteenhex/linux that referenced this issue Aug 1, 2020
@dileks @fifteenhex
x86/entry: Fix vectors to IDTENTRY_SYSVEC for CONFIG_HYPERV
6eca6a4 
When assembling with Clang via `make LLVM_IAS=1` and CONFIG_HYPERV enabled,
we observe the following 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;

This is caused by typos in arch/x86/include/asm/idtentry.h:

HYPERVISOR_REENLIGHTENMENT_VECTOR -> HYPERV_REENLIGHTENMENT_VECTOR
HYPERVISOR_STIMER0_VECTOR         -> HYPERV_STIMER0_VECTOR

For more details see ClangBuiltLinux issue #1088.

Fixes: a16be36 ("x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC")
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: ClangBuiltLinux#1088
Link: ClangBuiltLinux#1043
Link: https://lore.kernel.org/patchwork/patch/1272115/
Link: https://lkml.kernel.org/r/20200714194740.4548-1-sedat.dilek@gmail.com
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[ARCH] x86_64 This bug impacts ARCH=x86_64 [FIXED][LINUX] 5.8 This bug was fixed in Linux 5.8 [TOOL] integrated-as The issue is relevant to LLVM integrated assembler
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