linux.git/tools/arch/x86, branch v4.19

tools arch uapi: Sync the x86 kvm.h copy

2018-10-08T15:04:51+00:00

To get the changes in:

  d1766202779e ("x86/kvm/lapic: always disable MMIO interface in x2APIC mode")

That at this time will not generate changes in tools such as 'perf trace',
that still needs more work in tools/perf/examples/bpf/augmented_syscalls.c
to need such id -> string tables.

This silences the following perf build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/include/uapi/asm/kvm.h' differs from latest version at 'arch/x86/include/uapi/asm/kvm.h'
  diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Paolo Bonzini 
Cc: Vitaly Kuznetsov 
Cc: Wang Nan 
Link: https://lkml.kernel.org/n/tip-yadntj2ok6zpzjwi656onuh0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools headers uapi: Update tools's copies of kvm headers

2018-09-11T16:09:26+00:00

To get the changes in:

	a449938297e5 ("KVM: s390: Add huge page enablement control")
	8fcc4b5923af ("kvm: nVMX: Introduce KVM_CAP_NESTED_STATE")
	be26b3a73413 ("arm64: KVM: export the capability to set guest SError syndrome")
	b7b27facc7b5 ("arm/arm64: KVM: Add KVM_GET/SET_VCPU_EVENTS")
	b0960b9569db ("KVM: arm: Add 32bit get/set events support")
	a3da7b4a3be5 ("KVM: s390: add etoken support for guests")

This makes 'perf trace' automagically get aware of these new ioctls:

  $ cp include/uapi/linux/kvm.h tools/include/uapi/linux/kvm.h
  $ tools/perf/trace/beauty/kvm_ioctl.sh  > /tmp/after
  $ diff -u /tmp/before /tmp/after
  --- /tmp/before	2018-09-11 11:18:29.173207586 -0300
  +++ /tmp/after	2018-09-11 11:18:38.488200446 -0300
  @@ -84,6 +84,8 @@
        [0xbb] = "MEMORY_ENCRYPT_REG_REGION",
        [0xbc] = "MEMORY_ENCRYPT_UNREG_REGION",
        [0xbd] = "HYPERV_EVENTFD",
  +     [0xbe] = "GET_NESTED_STATE",
  +     [0xbf] = "SET_NESTED_STATE",
        [0xe0] = "CREATE_DEVICE",
        [0xe1] = "SET_DEVICE_ATTR",
        [0xe2] = "G

And cures the following warning during perf's build:

	Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
	diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h

Cc: Adrian Hunter 
Cc: Christian Borntraeger 
Cc: Cornelia Huck 
Cc: David Ahern 
Cc: David Hildenbrand 
Cc: Dongjiu Geng 
Cc: Eduardo Habkost 
Cc: James Morse 
Cc: Janosch Frank 
Cc: Jim Mattson 
Cc: Jiri Olsa 
Cc: Marc Zyngier 
Cc: Namhyung Kim 
Cc: Paolo Bonzini 
Cc: Peter Zijlstra 
Cc: Wang Nan 
Link: https://lkml.kernel.org/n/tip-2vvwh2o19orn56di0ksrtgzr@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo 

Signed-off-by: Arnaldo Carvalho de Melo

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2018-08-26T18:25:21+00:00

Pull perf updates from Thomas Gleixner:
 "Kernel:
   - Improve kallsyms coverage
   - Add x86 entry trampolines to kcore
   - Fix ARM SPE handling
   - Correct PPC event post processing

  Tools:
   - Make the build system more robust
   - Small fixes and enhancements all over the place
   - Update kernel ABI header copies
   - Preparatory work for converting libtraceevnt to a shared library
   - License cleanups"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (100 commits)
  tools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'
  tools arch x86: Update tools's copy of cpufeatures.h
  perf python: Fix pyrf_evlist__read_on_cpu() interface
  perf mmap: Store real cpu number in 'struct perf_mmap'
  perf tools: Remove ext from struct kmod_path
  perf tools: Add gzip_is_compressed function
  perf tools: Add lzma_is_compressed function
  perf tools: Add is_compressed callback to compressions array
  perf tools: Move the temp file processing into decompress_kmodule
  perf tools: Use compression id in decompress_kmodule()
  perf tools: Store compression id into struct dso
  perf tools: Add compression id into 'struct kmod_path'
  perf tools: Make is_supported_compression() static
  perf tools: Make decompress_to_file() function static
  perf tools: Get rid of dso__needs_decompress() call in __open_dso()
  perf tools: Get rid of dso__needs_decompress() call in symbol__disassemble()
  perf tools: Get rid of dso__needs_decompress() call in read_object_code()
  tools lib traceevent: Change to SPDX License format
  perf llvm: Allow passing options to llc in addition to clang
  perf parser: Improve error message for PMU address filters
  ...

tools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'

2018-08-20T13:17:14+00:00

To bring in the change made in this cset:

Fixes: a7bea8308933 ("x86/asm/64: Use 32-bit XOR to zero registers")

  CC       /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o
  LD       /tmp/build/perf/bench/perf-in.o
  LD       /tmp/build/perf/perf-in.o
  LINK     /tmp/build/perf/perf

Silencing this perf build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S'
  diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jan Beulich 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: https://lkml.kernel.org/n/tip-sad22dudoz71qr3tsnlqtkia@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools arch x86: Update tools's copy of cpufeatures.h

2018-08-20T13:13:13+00:00

To get the changes in the following csets:

  301d328a6f8b ("x86/cpufeatures: Add EPT_AD feature bit")
  706d51681d63 ("x86/speculation: Support Enhanced IBRS on future CPUs")

No tools were affected, copy it to silence this perf tool build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
  diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Feiner 
Cc: Sai Praneeth 
Cc: Thomas Gleixner 
Cc: Wang Nan 
Link: https://lkml.kernel.org/n/tip-bvs8wgd5wp4lz9f0xf1iug5r@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

Merge branch 'l1tf-final' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2018-08-14T16:46:06+00:00

Merge L1 Terminal Fault fixes from Thomas Gleixner:
 "L1TF, aka L1 Terminal Fault, is yet another speculative hardware
  engineering trainwreck. It's a hardware vulnerability which allows
  unprivileged speculative access to data which is available in the
  Level 1 Data Cache when the page table entry controlling the virtual
  address, which is used for the access, has the Present bit cleared or
  other reserved bits set.

  If an instruction accesses a virtual address for which the relevant
  page table entry (PTE) has the Present bit cleared or other reserved
  bits set, then speculative execution ignores the invalid PTE and loads
  the referenced data if it is present in the Level 1 Data Cache, as if
  the page referenced by the address bits in the PTE was still present
  and accessible.

  While this is a purely speculative mechanism and the instruction will
  raise a page fault when it is retired eventually, the pure act of
  loading the data and making it available to other speculative
  instructions opens up the opportunity for side channel attacks to
  unprivileged malicious code, similar to the Meltdown attack.

  While Meltdown breaks the user space to kernel space protection, L1TF
  allows to attack any physical memory address in the system and the
  attack works across all protection domains. It allows an attack of SGX
  and also works from inside virtual machines because the speculation
  bypasses the extended page table (EPT) protection mechanism.

  The assoicated CVEs are: CVE-2018-3615, CVE-2018-3620, CVE-2018-3646

  The mitigations provided by this pull request include:

   - Host side protection by inverting the upper address bits of a non
     present page table entry so the entry points to uncacheable memory.

   - Hypervisor protection by flushing L1 Data Cache on VMENTER.

   - SMT (HyperThreading) control knobs, which allow to 'turn off' SMT
     by offlining the sibling CPU threads. The knobs are available on
     the kernel command line and at runtime via sysfs

   - Control knobs for the hypervisor mitigation, related to L1D flush
     and SMT control. The knobs are available on the kernel command line
     and at runtime via sysfs

   - Extensive documentation about L1TF including various degrees of
     mitigations.

  Thanks to all people who have contributed to this in various ways -
  patches, review, testing, backporting - and the fruitful, sometimes
  heated, but at the end constructive discussions.

  There is work in progress to provide other forms of mitigations, which
  might be less horrible performance wise for a particular kind of
  workloads, but this is not yet ready for consumption due to their
  complexity and limitations"

* 'l1tf-final' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (75 commits)
  x86/microcode: Allow late microcode loading with SMT disabled
  tools headers: Synchronise x86 cpufeatures.h for L1TF additions
  x86/mm/kmmio: Make the tracer robust against L1TF
  x86/mm/pat: Make set_memory_np() L1TF safe
  x86/speculation/l1tf: Make pmd/pud_mknotpresent() invert
  x86/speculation/l1tf: Invert all not present mappings
  cpu/hotplug: Fix SMT supported evaluation
  KVM: VMX: Tell the nested hypervisor to skip L1D flush on vmentry
  x86/speculation: Use ARCH_CAPABILITIES to skip L1D flush on vmentry
  x86/speculation: Simplify sysfs report of VMX L1TF vulnerability
  Documentation/l1tf: Remove Yonah processors from not vulnerable list
  x86/KVM/VMX: Don't set l1tf_flush_l1d from vmx_handle_external_intr()
  x86/irq: Let interrupt handlers set kvm_cpu_l1tf_flush_l1d
  x86: Don't include linux/irq.h from asm/hardirq.h
  x86/KVM/VMX: Introduce per-host-cpu analogue of l1tf_flush_l1d
  x86/irq: Demote irq_cpustat_t::__softirq_pending to u16
  x86/KVM/VMX: Move the l1tf_flush_l1d test to vmx_l1d_flush()
  x86/KVM/VMX: Replace 'vmx_l1d_flush_always' with 'vmx_l1d_flush_cond'
  x86/KVM/VMX: Don't set l1tf_flush_l1d to true from vmx_l1d_flush()
  cpu/hotplug: detect SMT disabled by BIOS
  ...

tools headers: Synchronise x86 cpufeatures.h for L1TF additions

2018-08-09T06:56:32+00:00

Signed-off-by: David Woodhouse

tools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'

2018-07-30T15:36:51+00:00

To cope with the changes in:

  12c89130a56a ("x86/asm/memcpy_mcsafe: Add write-protection-fault handling")
  60622d68227d ("x86/asm/memcpy_mcsafe: Return bytes remaining")
  bd131544aa7e ("x86/asm/memcpy_mcsafe: Add labels for __memcpy_mcsafe() write fault handling")
  da7bc9c57eb0 ("x86/asm/memcpy_mcsafe: Remove loop unrolling")

This needed introducing a file with a copy of the mcsafe_handle_tail()
function, that is used in the new memcpy_64.S file, as well as a dummy
mcsafe_test.h header.

Testing it:

  $ nm ~/bin/perf | grep mcsafe
  0000000000484130 T mcsafe_handle_tail
  0000000000484300 T __memcpy_mcsafe
  $
  $ perf bench mem memcpy
  # Running 'mem/memcpy' benchmark:
  # function 'default' (Default memcpy() provided by glibc)
  # Copying 1MB bytes ...

      44.389205 GB/sec
  # function 'x86-64-unrolled' (unrolled memcpy() in arch/x86/lib/memcpy_64.S)
  # Copying 1MB bytes ...

      22.710756 GB/sec
  # function 'x86-64-movsq' (movsq-based memcpy() in arch/x86/lib/memcpy_64.S)
  # Copying 1MB bytes ...

      42.459239 GB/sec
  # function 'x86-64-movsb' (movsb-based memcpy() in arch/x86/lib/memcpy_64.S)
  # Copying 1MB bytes ...

      42.459239 GB/sec
  $

This silences this perf tools build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S'

Cc: Adrian Hunter 
Cc: Dan Williams 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Mika Penttilä 
Cc: Namhyung Kim 
Cc: Tony Luck 
Cc: Wang Nan 
Link: https://lkml.kernel.org/n/tip-igdpciheradk3gb3qqal52d0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools/headers: Pick up latest kernel ABIs

2018-06-26T06:43:14+00:00

Sync KVM ABI additions and x86 CPU features additions - neither of which
has any impact on the tooling build.

Cc: Arnaldo Carvalho de Melo 
Cc: Peter Zijlstra 
Cc: Namhyung Kim 
Cc: Jiri Olsa 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

tools headers: Sync x86 cpufeatures.h with the kernel sources

2018-06-01T19:13:16+00:00

To pick up changes found in these csets:

 11fb0683493b x86/speculation: Add virtualized speculative store bypass disable support
 d1035d971829 x86/cpufeatures: Add FEATURE_ZEN
 52817587e706 x86/cpufeatures: Disentangle SSBD enumeration
 7eb8956a7fec x86/cpufeatures: Disentangle MSR_SPEC_CTRL enumeration from IBRS
 e7c587da1252 x86/speculation: Use synthetic bits for IBRS/IBPB/STIBP
 9f65fb29374e x86/bugs: Rename _RDS to _SSBD
 764f3c21588a x86/bugs/AMD: Add support to disable RDS on Fam[15,16,17]h if requested
 24f7fc83b920 x86/bugs: Provide boot parameters for the spec_store_bypass_disable mitigation
 0cc5fa00b0a8 x86/cpufeatures: Add X86_FEATURE_RDS
 c456442cd3a5 x86/bugs: Expose /sys/../spec_store_bypass

The usage of this file in tools doesn't use the newly added X86_FEATURE_
defines:

  CC       /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o
  CC       /tmp/build/perf/bench/mem-memset-x86-64-asm.o
  LD       /tmp/build/perf/bench/perf-in.o
  LD       /tmp/build/perf/perf-in.o

Silencing this perf build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'

Cc: Adrian Hunter 
Cc: Borislav Petkov 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Konrad Rzeszutek Wilk 
Cc: Namhyung Kim 
Cc: Thomas Gleixner 
Cc: Tom Lendacky 
Cc: Wang Nan 
Link: https://lkml.kernel.org/n/tip-mrwyauyov8c7s048abg26khg@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo