kernel/linux.git/tools/arch/x86, branch v6.18.21

tools headers UAPI: Sync KVM's vmx.h with the kernel to pick SEAMCALL exit reason

2025-11-13T20:16:34+00:00

To pick the changes in: 9d7dfb95da2cb5c1 ("KVM: VMX: Inject #UD if guest tries to execute SEAMCALL or TDCALL") The 'perf kvm-stat' tool uses the exit reasons that are included in the VMX_EXIT_REASONS define, this new SEAMCALL isn't included there (TDCALL is), so shouldn't be causing any change in behaviour, this patch ends up being just addressess the following perf build warning: Warning: Kernel ABI header differences: diff -u tools/arch/x86/include/uapi/asm/vmx.h arch/x86/include/uapi/asm/vmx.h Please see tools/include/uapi/README for further details. Cc: Sean Christopherson Signed-off-by: Arnaldo Carvalho de Melo

tools headers UAPI: Sync KVM's vmx.h header with the kernel sources to handle new exit reasons

2025-11-03T16:29:53+00:00

To pick the changes in: 885df2d2109a60f8 ("KVM: x86: Add support for RDMSR/WRMSRNS w/ immediate on Intel") c42856af8f70d983 ("KVM: TDX: Add a place holder for handler of TDX hypercalls (TDG.VP.VMCALL)") That makes 'perf kvm-stat' aware of these new TDCALL and MSR_{READ,WRITE}_IMM exit reasons, thus addressing the following perf build warning: Warning: Kernel ABI header differences: diff -u tools/arch/x86/include/uapi/asm/vmx.h arch/x86/include/uapi/asm/vmx.h Please see tools/include/uapi/README for further details. Cc: Sean Christopherson Cc: Xin Li Cc: Isaku Yamahata Cc: Paolo Bonzini Signed-off-by: Arnaldo Carvalho de Melo

tools headers svm: Sync svm headers with the kernel sources

2025-11-03T16:29:53+00:00

To pick the changes in: b8c3c9f5d0505905 ("x86/apic: Initialize Secure AVIC APIC backing page") That triggers: CC /tmp/build/perf-tools/arch/x86/util/kvm-stat.o LD /tmp/build/perf-tools/arch/x86/util/perf-util-in.o LD /tmp/build/perf-tools/arch/x86/perf-util-in.o LD /tmp/build/perf-tools/arch/perf-util-in.o LD /tmp/build/perf-tools/perf-util-in.o AR /tmp/build/perf-tools/libperf-util.a LINK /tmp/build/perf-tools/perf But this time causes no changes in tooling results, as the introduced SVM_VMGEXIT_SAVIC exit reason wasn't added to SVM_EXIT_REASONS, that is used in kvm-stat.c. And addresses this perf build warning: Warning: Kernel ABI header differences: diff -u tools/arch/x86/include/uapi/asm/svm.h arch/x86/include/uapi/asm/svm.h Please see tools/include/uapi/README for further details. Cc: Borislav Petkov (AMD) Cc: Neeraj Upadhyay Signed-off-by: Arnaldo Carvalho de Melo

tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources

2025-11-03T16:29:53+00:00

To pick the changes in: fddd07626baa419c ("KVM: x86: Define AMD's #HV, #VC, and #SX exception vectors") f2f5519aa4e3ec4e ("KVM: x86: Define Control Protection Exception (#CP) vector") 9d6812d415358372 ("KVM: x86: Enable guest SSP read/write interface with new uAPIs") 06f2969c6a1237f0 ("KVM: x86: Introduce KVM_{G,S}ET_ONE_REG uAPIs support") That just rebuilds kvm-stat.c on x86, no change in functionality. This silences these perf build warning: Warning: Kernel ABI header differences: diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h Please see tools/include/uapi/README for further details. Cc: Sean Christopherson Cc: Yang Weijiang Signed-off-by: Arnaldo Carvalho de Melo

tools headers x86 cpufeatures: Sync with the kernel sources

2025-11-01T16:16:47+00:00

To pick the changes from: e19c06219985f2be ("x86/cpufeatures: Add support for Assignable Bandwidth Monitoring Counters (ABMC)") 7b59c73fd611eae8 ("x86/cpufeatures: Add SNP Secure TSC") 3c7cb84145336721 ("x86/cpufeatures: Add a CPU feature bit for MSR immediate form instructions") 2f8f173413f1cbf5 ("x86/vmscape: Add conditional IBPB mitigation") a508cec6e5215a3f ("x86/vmscape: Enumerate VMSCAPE bug") This causes these perf files to be rebuilt and brings some X86_FEATURE that may be used by: CC /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o CC /tmp/build/perf/bench/mem-memset-x86-64-asm.o And addresses this perf build warning: Warning: Kernel ABI header differences: diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h Please see tools/include/uapi/README for further details. Cc: Babu Moger Cc: Borislav Petkov (AMD) Cc: Dave Hansen Cc: Nikunj A Dadhania Cc: Pawan Gupta Cc: Sean Christopherson Cc: Xin Li Signed-off-by: Arnaldo Carvalho de Melo

tools arch x86: Sync msr-index.h to pick AMD64_{PERF_CNTR_GLOBAL_STATUS_SET,SAVIC_CONTROL}, IA32_L3_QOS_{ABMC,EXT}_CFG

2025-11-01T15:24:27+00:00

To pick up the changes in: cdfed9370b96aaba ("KVM: x86/pmu: Move PMU_CAP_{FW_WRITES,LBR_FMT} into msr-index.h header") bc6397cf0bc4f2b7 ("x86/cpu/topology: Define AMD64_CPUID_EXT_FEAT MSR") 84ecefb766748916 ("x86/resctrl: Add data structures and definitions for ABMC assignment") faebbc58cde9d8f6 ("x86/resctrl: Add support to enable/disable AMD ABMC feature") c4074ab87f3483de ("x86/apic: Enable Secure AVIC in the control MSR") 869e36b9660dd72a ("x86/apic: Allow NMI to be injected from hypervisor for Secure AVIC") 30c2b98aa84c76f2 ("x86/apic: Add new driver for Secure AVIC") 0c5caea762de31a8 ("perf/x86: Add PERF_CAP_PEBS_TIMING_INFO flag") 68e61f6fd65610e7 ("KVM: SVM: Emulate PERF_CNTR_GLOBAL_STATUS_SET for PerfMonV2") a3c4f3396b82849a ("x86/msr-index: Add AMD workload classification MSRs") 65f55a30176662ee ("x86/CPU/AMD: Add CPUID faulting support") 17ec2f965344ee3f ("KVM: VMX: Allow guest to set DEBUGCTL.RTM_DEBUG if RTM is supported") Addressing this tools/perf build warning: Warning: Kernel ABI header differences: diff -u tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h That makes the beautification scripts to pick some new entries: $ tools/perf/trace/beauty/tracepoints/x86_msr.sh > before $ cp arch/x86/include/asm/msr-index.h tools/arch/x86/include/asm/msr-index.h $ tools/perf/trace/beauty/tracepoints/x86_msr.sh > after $ diff -u before after --- before 2025-10-30 09:34:49.283533597 -0300 +++ after 2025-10-30 09:35:00.971426811 -0300 @@ -272,6 +272,9 @@ [0xc0000300 - x86_64_specific_MSRs_offset] = "AMD64_PERF_CNTR_GLOBAL_STATUS", [0xc0000301 - x86_64_specific_MSRs_offset] = "AMD64_PERF_CNTR_GLOBAL_CTL", [0xc0000302 - x86_64_specific_MSRs_offset] = "AMD64_PERF_CNTR_GLOBAL_STATUS_CLR", + [0xc0000303 - x86_64_specific_MSRs_offset] = "AMD64_PERF_CNTR_GLOBAL_STATUS_SET", + [0xc00003fd - x86_64_specific_MSRs_offset] = "IA32_L3_QOS_ABMC_CFG", + [0xc00003ff - x86_64_specific_MSRs_offset] = "IA32_L3_QOS_EXT_CFG", [0xc0000400 - x86_64_specific_MSRs_offset] = "IA32_EVT_CFG_BASE", [0xc0000500 - x86_64_specific_MSRs_offset] = "AMD_WORKLOAD_CLASS_CONFIG", [0xc0000501 - x86_64_specific_MSRs_offset] = "AMD_WORKLOAD_CLASS_ID", @@ -319,6 +322,7 @@ [0xc0010133 - x86_AMD_V_KVM_MSRs_offset] = "AMD64_RMP_END", [0xc0010134 - x86_AMD_V_KVM_MSRs_offset] = "AMD64_GUEST_TSC_FREQ", [0xc0010136 - x86_AMD_V_KVM_MSRs_offset] = "AMD64_RMP_CFG", + [0xc0010138 - x86_AMD_V_KVM_MSRs_offset] = "AMD64_SAVIC_CONTROL", [0xc0010140 - x86_AMD_V_KVM_MSRs_offset] = "AMD64_OSVW_ID_LENGTH", [0xc0010141 - x86_AMD_V_KVM_MSRs_offset] = "AMD64_OSVW_STATUS", [0xc0010200 - x86_AMD_V_KVM_MSRs_offset] = "F15H_PERF_CTL", $ Now one can trace systemwide asking to see backtraces to where that MSR is being read/written: root@x1:~# perf trace -e msr:*_msr/max-stack=32/ --filter="msr==IA32_L3_QOS_ABMC_CFG" ^Croot@x1:~# If we use -v (verbose mode) we can see what it does behind the scenes: root@x1:~# perf trace -v -e msr:*_msr/max-stack=32/ --filter="msr==IA32_L3_QOS_ABMC_CFG" 0xc00003fd New filter for msr:write_msr: (msr==0xc00003fd) && (common_pid != 449842 && common_pid != 433756) 0xc00003fd New filter for msr:read_msr: (msr==0xc00003fd) && (common_pid != 449842 && common_pid != 433756) mmap size 528384B ^Croot@x1:~# Example with a frequent msr: # perf trace -v -e msr:*_msr/max-stack=32/ --filter="msr==IA32_SPEC_CTRL" --max-events 2 Using CPUID AuthenticAMD-25-21-0 0x48 New filter for msr:read_msr: (msr==0x48) && (common_pid != 2612129 && common_pid != 3841) 0x48 New filter for msr:write_msr: (msr==0x48) && (common_pid != 2612129 && common_pid != 3841) mmap size 528384B Looking at the vmlinux_path (8 entries long) symsrc__init: build id mismatch for vmlinux. Using /proc/kcore for kernel data Using /proc/kallsyms for symbols 0.000 Timer/2525383 msr:write_msr(msr: IA32_SPEC_CTRL, val: 6) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) __switch_to_xtra ([kernel.kallsyms]) __switch_to ([kernel.kallsyms]) __schedule ([kernel.kallsyms]) schedule ([kernel.kallsyms]) futex_wait_queue_me ([kernel.kallsyms]) futex_wait ([kernel.kallsyms]) do_futex ([kernel.kallsyms]) __x64_sys_futex ([kernel.kallsyms]) do_syscall_64 ([kernel.kallsyms]) entry_SYSCALL_64_after_hwframe ([kernel.kallsyms]) __futex_abstimed_wait_common64 (/usr/lib64/libpthread-2.33.so) 0.030 :0/0 msr:write_msr(msr: IA32_SPEC_CTRL, val: 2) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) __switch_to_xtra ([kernel.kallsyms]) __switch_to ([kernel.kallsyms]) __schedule ([kernel.kallsyms]) schedule_idle ([kernel.kallsyms]) do_idle ([kernel.kallsyms]) cpu_startup_entry ([kernel.kallsyms]) secondary_startup_64_no_verify ([kernel.kallsyms]) # Please see tools/include/uapi/README for further details. Cc: Adrian Hunter Cc: Babu Moger Cc: Dapeng Mi Cc: Ian Rogers Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: K Prateek Nayak Cc: Namhyung Kim Cc: Neeraj Upadhyay Cc: Perry Yuan Cc: Peter Zijlstra Cc: Sean Christopherson Signed-off-by: Arnaldo Carvalho de Melo

Merge tag 'x86_cleanups_for_v6.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-10-11T17:51:14+00:00

Pull x86 cleanups from Borislav Petkov: - Simplify inline asm flag output operands now that the minimum compiler version supports the =@ccCOND syntax - Remove a bunch of AS_* Kconfig symbols which detect assembler support for various instruction mnemonics now that the minimum assembler version supports them all - The usual cleanups all over the place * tag 'x86_cleanups_for_v6.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/asm: Remove code depending on __GCC_ASM_FLAG_OUTPUTS__ x86/sgx: Use ENCLS mnemonic in x86/mtrr: Remove license boilerplate text with bad FSF address x86/asm: Use RDPKRU and WRPKRU mnemonics in x86/idle: Use MONITORX and MWAITX mnemonics in x86/entry/fred: Push __KERNEL_CS directly x86/kconfig: Remove CONFIG_AS_AVX512 crypto: x86 - Remove CONFIG_AS_VPCLMULQDQ crypto: X86 - Remove CONFIG_AS_VAES crypto: x86 - Remove CONFIG_AS_GFNI x86/kconfig: Drop unused and needless config X86_64_SMP

Merge tag 'perf-tools-for-v6.18-1-2025-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

2025-10-09T02:24:24+00:00

Pull perf tools updates from Arnaldo Carvalho de Melo: - Extended 'perf annotate' with DWARF type information (--code-with-type) integration in the TUI, including a 'T' hotkey to toggle it - Enhanced 'perf bench mem' with new mmap() workloads and control over page/chunk sizes - Fix 'perf stat' error handling to correctly display unsupported events - Improved support for Clang cross-compilation - Refactored LLVM and Capstone disasm for modularity - Introduced the :X modifier to exclude an event from automatic regrouping - Adjusted KVM sampling defaults to use the "cycles" event to prevent failures - Added comprehensive support for decoding PowerPC Dispatch Trace Log (DTL) - Updated Arm SPE tracing logic for better analysis of memory and snoop details - Synchronized Intel PMU events and metrics with TMA 5.1 across multiple processor generations - Converted dependencies like libperl and libtracefs to be opt-in - Handle more Rust symbols in kallsyms ('N', debugging) - Improve the python binding to allow for python based tools to use more of the libraries, add a 'ilist' utility to test those new bindings - Various 'perf test' fixes - Kan Liang no longer a perf tools reviewer * tag 'perf-tools-for-v6.18-1-2025-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (192 commits) perf tools: Fix arm64 libjvmti build by generating unistd_64.h perf tests: Don't retest sections in "Object code reading" perf docs: Document building with Clang perf build: Support build with clang perf test coresight: Dismiss clang warning for unroll loop thread perf test coresight: Dismiss clang warning for thread loop perf test coresight: Dismiss clang warning for memcpy thread perf build: Disable thread safety analysis for perl header perf build: Correct CROSS_ARCH for clang perf python: split Clang options when invoking Popen tools build: Align warning options with perf perf disasm: Remove unused evsel from 'struct annotate_args' perf srcline: Fallback between addr2line implementations perf disasm: Make ins__scnprintf() and ins__is_nop() static perf dso: Clean up read_symbol() error handling perf dso: Support BPF programs in dso__read_symbol() perf dso: Move read_symbol() from llvm/capstone to dso perf llvm: Reduce LLVM initialization perf check: Add libLLVM feature perf parse-events: Fix parsing of >30kb event strings ...

Merge tag 'vfio-v6.18-rc1' of https://github.com/awilliam/linux-vfio

2025-10-04T15:24:54+00:00

Pull VFIO updates from Alex Williamson: - Use fdinfo to expose the sysfs path of a device represented by a vfio device file (Alex Mastro) - Mark vfio-fsl-mc, vfio-amba, and the reset functions for vfio-platform for removal as these are either orphaned or believed to be unused (Alex Williamson) - Add reviewers for vfio-platform to save it from also being marked for removal (Mostafa Saleh, Pranjal Shrivastava) - VFIO selftests, including basic sanity testing and minimal userspace drivers for testing against real hardware. This is also expected to provide integration with KVM selftests for KVM-VFIO interfaces (David Matlack, Josh Hilke) - Fix drivers/cdx and vfio/cdx to build without CONFIG_GENERIC_MSI_IRQ (Nipun Gupta) - Fix reference leak in hisi_acc (Miaoqian Lin) - Use consistent return for unsupported device feature (Alex Mastro) - Unwind using the correct memory free callback in vfio/pds (Zilin Guan) - Use IRQ_DISABLE_LAZY flag to improve handling of pre-PCI2.3 INTx and resolve stalled interrupt on ppc64 (Timothy Pearson) - Enable GB300 in nvgrace-gpu vfio-pci variant driver (Tushar Dave) - Misc: - Drop unnecessary ternary conversion in vfio/pci (Xichao Zhao) - Grammatical fix in nvgrace-gpu (Morduan Zang) - Update Shameer's email address (Shameer Kolothum) - Fix document build warning (Alex Williamson) * tag 'vfio-v6.18-rc1' of https://github.com/awilliam/linux-vfio: (48 commits) vfio/nvgrace-gpu: Add GB300 SKU to the devid table vfio/pci: Fix INTx handling on legacy non-PCI 2.3 devices vfio/pds: replace bitmap_free with vfree vfio: return -ENOTTY for unsupported device feature hisi_acc_vfio_pci: Fix reference leak in hisi_acc_vfio_debug_init vfio/platform: Mark reset drivers for removal vfio/amba: Mark for removal MAINTAINERS: Add myself as VFIO-platform reviewer MAINTAINERS: Add myself as VFIO-platform reviewer docs: proc.rst: Fix VFIO Device title formatting vfio: selftests: Fix .gitignore for already tracked files vfio/cdx: update driver to build without CONFIG_GENERIC_MSI_IRQ cdx: don't select CONFIG_GENERIC_MSI_IRQ MAINTAINERS: Update Shameer Kolothum's email address vfio: selftests: Add a script to help with running VFIO selftests vfio: selftests: Make iommufd the default iommu_mode vfio: selftests: Add iommufd mode vfio: selftests: Add iommufd_compat_type1{,v2} modes vfio: selftests: Add vfio_type1v2_mode vfio: selftests: Replicate tests across all iommu_modes ...

Merge tag 'x86_misc_for_v6.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-09-30T18:48:33+00:00

Pull x86 instruction decoder update from Borislav Petkov: - Add instruction decoding support for the XOP-prefixed instruction set present on the AMD Bulldozer uarch [ These instructions don't normally happen, but a X86_NATIVE_CPU build on a bulldozer host can make the compiler then use these unusual instruction encodings ] * tag 'x86_misc_for_v6.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/insn: Add XOP prefix instructions decoder support