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[PW_SID:1124654] RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping#2253

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[PW_SID:1124654] RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping#2253
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@linux-riscv-bot linux-riscv-bot commented Jul 9, 2026

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PR for series 1124654 applied to workflow__riscv__fixes

Name: RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping
URL: https://patchwork.kernel.org/project/linux-riscv/list/?series=1124654
Version: 1

Linux RISC-V bot and others added 2 commits July 8, 2026 17:32
Adding CI files
40ba5ca
RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI tra…
711c4b2 
…pping

Add a kernel command-line option, kvm-riscv.wfi_trap_policy=trap|notrap,
that controls whether a WFI executed by a VS-mode guest traps into KVM
(HS-mode) or executes natively.

Measured results (wfi_exit_stat delta / guest wake count over 3 s):

  policy        WFI_EXITS   WAKE_CNT
  ----------    ---------   --------
  default       295         294      (== trap, no regression)
  trap          295         294
  notrap          0         298

Assisted-by: YuanSheng:deepseek-v4-pro
Co-developed-by: Quan Zhou <zhouquan@iscas.ac.cn>
Signed-off-by: Quan Zhou <zhouquan@iscas.ac.cn>
Signed-off-by: Yuhang.chen <yhchen312@gmail.com>
Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>
@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
build-rv32-defconfig
Desc: Builds riscv32 defconfig
Duration: 124.64 seconds
Result: ERROR
Output:

Full log:
W: Support for running offline not available (unshare: unshare failed: Operation not permitted)
I: config: PASS in 0:00:33.660134
I: default: FAIL in 0:01:24.958211
I: kernel: SKIP in 0:00:00.000005
I: xipkernel: SKIP in 0:00:00.000002
I: modules: FAIL in 0:00:00.080894
I: dtbs: PASS in 0:00:01.433848
I: dtbs-legacy: SKIP in 0:00:00.004299
I: debugkernel: SKIP in 0:00:00.000002
I: headers: PASS in 0:00:00.996375
I: build output in /build/tmp.dayAYsWEVc
tuxmake --download-all-korg-gcc-toolchains --target-arch=riscv --kconfig=rv32_defconfig --toolchain=llvm --wrapper=ccache --environment=KBUILD_BUILD_TIMESTAMP=@1621270510 --environment=KBUILD_BUILD_USER=tuxmake --environment=KBUILD_BUILD_HOST=tuxmake --environment=KCFLAGS=-ffile-prefix-map=/build/tmp.dayAYsWEVc/build/= --runtime=null --image=docker.io/tuxmake/riscv_clang CROSS_COMPILE=riscv64-linux- config default kernel xipkernel modules dtbs dtbs-legacy debugkernel headers
make --silent --keep-going --jobs=48 O=/build/tmp.dayAYsWEVc/build ARCH=riscv CROSS_COMPILE=riscv64-linux- LLVM=1 'CC=ccache clang' 'HOSTCC=ccache clang' rv32_defconfig
make --silent --keep-going --jobs=48 O=/build/tmp.dayAYsWEVc/build ARCH=riscv CROSS_COMPILE=riscv64-linux- LLVM=1 'CC=ccache clang' 'HOSTCC=ccache clang'
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:13: error: expected parameter declarator
   59 | early_param("kvm-riscv.wfi_trap_policy", early_kvm_riscv_wfi_trap_policy_cfg);
      |             ^
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:13: error: expected ')'
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:12: note: to match this '('
   59 | early_param("kvm-riscv.wfi_trap_policy", early_kvm_riscv_wfi_trap_policy_cfg);
      |            ^
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:1: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
   59 | early_param("kvm-riscv.wfi_trap_policy", early_kvm_riscv_wfi_trap_policy_cfg);
      | ^
      | int
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:12: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
   59 | early_param("kvm-riscv.wfi_trap_policy", early_kvm_riscv_wfi_trap_policy_cfg);
      |            ^                                                                
      |                                                                             void
4 errors generated.
make[5]: *** [/build/tmpxlz0ecck/scripts/Makefile.build:289: arch/riscv/kvm/vcpu.o] Error 1
make[5]: Target 'arch/riscv/kvm/' not remade because of errors.
make[4]: *** [/build/tmpxlz0ecck/scripts/Makefile.build:549: arch/riscv/kvm] Error 2
make[4]: Target 'arch/riscv/' not remade because of errors.
make[3]: *** [/build/tmpxlz0ecck/scripts/Makefile.build:549: arch/riscv] Error 2
make[3]: Target './' not remade because of errors.
make[2]: *** [/build/tmpxlz0ecck/Makefile:2184: .] Error 2
make[2]: Target '__all' not remade because of errors.
make[1]: *** [/build/tmpxlz0ecck/Makefile:248: __sub-make] Error 2
make[1]: Target '__all' not remade because of errors.
make: *** [Makefile:248: __sub-make] Error 2
make: Target '__all' not remade because of errors.
rm -rf /build/tmp.dayAYsWEVc/build/modinstall
make --silent --keep-going --jobs=48 O=/build/tmp.dayAYsWEVc/build INSTALL_MOD_STRIP=1 INSTALL_MOD_PATH=/build/tmp.dayAYsWEVc/build/modinstall ARCH=riscv CROSS_COMPILE=riscv64-linux- LLVM=1 'CC=ccache clang' 'HOSTCC=ccache clang' modules_install
make[3]: *** No rule to make target 'modules.order', needed by '/build/tmp.dayAYsWEVc/build/modinstall/lib/modules/7.2.0-rc2-00010-g711c4b2cd177/modules.order'.
make[3]: *** No rule to make target 'modules.builtin', needed by '/build/tmp.dayAYsWEVc/build/modinstall/lib/modules/7.2.0-rc2-00010-g711c4b2cd177/modules.builtin'.
make[3]: *** No rule to make target 'modules.builtin.modinfo', needed by '/build/tmp.dayAYsWEVc/build/modinstall/lib/modules/7.2.0-rc2-00010-g711c4b2cd177/modules.builtin.modinfo'.
make[3]: Target '__modinst' not remade because of errors.
make[2]: *** [/build/tmpxlz0ecck/Makefile:2090: modules_install] Error 2
make[1]: *** [/build/tmpxlz0ecck/Makefile:248: __sub-make] Error 2
make[1]: Target 'modules_install' not remade because of errors.
make: *** [Makefile:248: __sub-make] Error 2
make: Target 'modules_install' not remade because of errors.
make --silent --keep-going --jobs=48 O=/build/tmp.dayAYsWEVc/build INSTALL_DTBS_PATH=/build/tmp.dayAYsWEVc/build/dtbsinstall/dtbs ARCH=riscv CROSS_COMPILE=riscv64-linux- LLVM=1 'CC=ccache clang' 'HOSTCC=ccache clang' dtbs
rm -rf /build/tmp.dayAYsWEVc/build/dtbsinstall
mkdir -p /build/tmp.dayAYsWEVc/build/dtbsinstall/dtbs
make --silent --keep-going --jobs=48 O=/build/tmp.dayAYsWEVc/build INSTALL_DTBS_PATH=/build/tmp.dayAYsWEVc/build/dtbsinstall/dtbs ARCH=riscv CROSS_COMPILE=riscv64-linux- LLVM=1 'CC=ccache clang' 'HOSTCC=ccache clang' dtbs_install
tar --sort=name --owner=tuxmake:1000 --group=tuxmake:1000 --mtime=@1783605114 --clamp-mtime -caf /build/tmp.dayAYsWEVc/build/dtbs.tar -C /build/tmp.dayAYsWEVc/build/dtbsinstall dtbs
rm -rf /build/tmp.dayAYsWEVc/build/install_hdr
make --silent --keep-going --jobs=48 O=/build/tmp.dayAYsWEVc/build INSTALL_HDR_PATH=/build/tmp.dayAYsWEVc/build/install_hdr/ ARCH=riscv CROSS_COMPILE=riscv64-linux- LLVM=1 'CC=ccache clang' 'HOSTCC=ccache clang' headers_install
tar --sort=name --owner=tuxmake:1000 --group=tuxmake:1000 --mtime=@1783605114 --clamp-mtime -caf /build/tmp.dayAYsWEVc/build/headers.tar -C /build/tmp.dayAYsWEVc/build/install_hdr .
warnings/errors:
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:13: error: expected parameter declarator
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:13: error: expected ')'
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:1: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:12: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
build-rv64-clang-allmodconfig
Desc: Builds riscv64 allmodconfig with Clang, and checks for errors and added warnings
Duration: 771.86 seconds
Result: ERROR
Output:

Redirect to /build/tmp.WePbQJhTzF and /build/tmp.REF5WfweKd
Tree base:
40ba5ca5ff6b1 ("Adding CI files")
Building the whole tree with the patch
error:
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:13: error: expected parameter declarator
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:13: error: expected ')'
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:1: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:12: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]



real	12m43.571s
user	494m30.991s
sys	85m24.550s

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
build-rv64-gcc-allmodconfig
Desc: Builds riscv64 allmodconfig with GCC, and checks for errors and added warnings
Duration: 1036.88 seconds
Result: ERROR
Output:

Redirect to /build/tmp.SUyZvFWqav and /build/tmp.DEzctGVZ4h
Tree base:
40ba5ca5ff6b1 ("Adding CI files")
Building the whole tree with the patch
error:
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:13: error: expected declaration specifiers or '...' before string constant
/build/tmpxlz0ecck/arch/riscv/kvm/vcpu.c:59:42: error: expected declaration specifiers or '...' before 'early_kvm_riscv_wfi_trap_policy_cfg'



real	17m9.899s
user	675m36.118s
sys	103m56.324s

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
build-rv64-nommu-k210-defconfig
Desc: Builds riscv64 defconfig with NOMMU for K210
Duration: 26.59 seconds
Result: PASS

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
build-rv64-nommu-k210-virt
Desc: Builds riscv64 defconfig with NOMMU for the virt platform
Duration: 27.61 seconds
Result: PASS

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
checkpatch
Desc: Runs checkpatch.pl on the patch
Duration: 1.04 seconds
Result: PASS

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
dtb-warn-rv64
Desc: Checks for Device Tree warnings/errors
Duration: 87.56 seconds
Result: PASS

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
header-inline
Desc: Detects static functions without inline keyword in header files
Duration: 0.24 seconds
Result: PASS

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
kdoc
Desc: Detects for kdoc errors
Duration: 0.90 seconds
Result: PASS

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
module-param
Desc: Detect module_param changes
Duration: 0.28 seconds
Result: PASS

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
verify-fixes
Desc: Verifies that the Fixes: tags exist
Duration: 0.23 seconds
Result: PASS

@linux-riscv-bot

linux-riscv-bot commented Jul 9, 2026

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Patch 1: "RISC-V: KVM: Add kvm-riscv.wfi_trap_policy to control VS-mode WFI trapping"
verify-signedoff
Desc: Verifies that Signed-off-by: tags are correct
Duration: 0.30 seconds
Result: PASS

@linux-riscv-bot
linux-riscv-bot force-pushed the workflow__riscv__fixes branch from 40ba5ca to 2b6a725 Compare July 10, 2026 16:34
@linux-riscv-bot
linux-riscv-bot deleted the pw1124654 branch July 10, 2026 18:15
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