| Message ID | 122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl (mailing list archive) |
|---|---|
| Headers | show |
| Series | Implement support for external IPT monitoring | expand |
----- 19 cze 2020 o 1:34, Michał Leszczyński michal.leszczynski@cert.pl napisał(a): > Intel Processor Trace is an architectural extension available in modern Intel > family CPUs. It allows recording the detailed trace of activity while the > processor executes the code. One might use the recorded trace to reconstruct > the code flow. It means, to find out the executed code paths, determine > branches taken, and so forth. > > The abovementioned feature is described in Intel(R) 64 and IA-32 Architectures > Software Developer's Manual Volume 3C: System Programming Guide, Part 3, > Chapter 36: "Intel Processor Trace." > > This patch series implements an interface that Dom0 could use in order to > enable IPT for particular vCPUs in DomU, allowing for external monitoring. Such > a feature has numerous applications like malware monitoring, fuzzing, or > performance testing. > > Also thanks to Tamas K Lengyel for a few preliminary hints before > first version of this patch was submitted to xen-devel. > > Changed since v1: > * MSR_RTIT_CTL is managed using MSR load lists > * other PT-related MSRs are modified only when vCPU goes out of context > * trace buffer is now acquired as a resource > * added vmtrace_pt_size parameter in xl.cfg, the size of trace buffer > must be specified in the moment of domain creation > * trace buffers are allocated on domain creation, destructed on > domain destruction > * HVMOP_vmtrace_ipt_enable/disable is limited to enabling/disabling PT > these calls don't manage buffer memory anymore > * lifted 32 MFN/GFN array limit when acquiring resources > * minor code style changes according to review > > Michal Leszczynski (7): > xen/mm: lift 32 item limit from mfn/gfn arrays > x86/vmx: add Intel PT MSR definitions > x86/vmx: add IPT cpu feature > x86/vmx: add do_vmtrace_op > tools/libxc: add xc_vmtrace_* functions > tools/libxl: add vmtrace_pt_size parameter > tools/proctrace: add proctrace tool > > tools/golang/xenlight/helpers.gen.go | 2 + > tools/golang/xenlight/types.gen.go | 1 + > tools/libxc/Makefile | 1 + > tools/libxc/include/xenctrl.h | 39 +++ > tools/libxc/xc_vmtrace.c | 97 ++++++ > tools/libxl/libxl_types.idl | 2 + > tools/libxl/libxl_x86.c | 5 + > tools/proctrace/COPYING | 339 ++++++++++++++++++++ > tools/proctrace/Makefile | 50 +++ > tools/proctrace/proctrace.c | 153 +++++++++ > tools/xl/xl_parse.c | 4 + > xen/arch/x86/hvm/hvm.c | 167 ++++++++++ > xen/arch/x86/hvm/vmx/vmcs.c | 4 + > xen/arch/x86/hvm/vmx/vmx.c | 24 ++ > xen/arch/x86/mm.c | 37 +++ > xen/common/domain.c | 1 + > xen/common/memory.c | 39 +-- > xen/include/asm-x86/cpufeature.h | 1 + > xen/include/asm-x86/hvm/hvm.h | 9 + > xen/include/asm-x86/hvm/vmx/vmcs.h | 17 + > xen/include/asm-x86/msr-index.h | 37 +++ > xen/include/public/arch-x86/cpufeatureset.h | 1 + > xen/include/public/hvm/hvm_op.h | 23 ++ > xen/include/public/hvm/params.h | 5 +- > xen/include/public/memory.h | 1 + > xen/include/xen/sched.h | 3 + > 26 files changed, 1039 insertions(+), 23 deletions(-) > create mode 100644 tools/libxc/xc_vmtrace.c > create mode 100644 tools/proctrace/COPYING > create mode 100644 tools/proctrace/Makefile > create mode 100644 tools/proctrace/proctrace.c > > -- > 2.20.1 Thanks for all comments related to v1. I did my best to address all of them and thus almost all code was altered. Due to that, I've decided to post the next version at this stage.
Intel Processor Trace is an architectural extension available in modern Intel family CPUs. It allows recording the detailed trace of activity while the processor executes the code. One might use the recorded trace to reconstruct the code flow. It means, to find out the executed code paths, determine branches taken, and so forth. The abovementioned feature is described in Intel(R) 64 and IA-32 Architectures Software Developer's Manual Volume 3C: System Programming Guide, Part 3, Chapter 36: "Intel Processor Trace." This patch series implements an interface that Dom0 could use in order to enable IPT for particular vCPUs in DomU, allowing for external monitoring. Such a feature has numerous applications like malware monitoring, fuzzing, or performance testing. Also thanks to Tamas K Lengyel for a few preliminary hints before first version of this patch was submitted to xen-devel. Changed since v1: * MSR_RTIT_CTL is managed using MSR load lists * other PT-related MSRs are modified only when vCPU goes out of context * trace buffer is now acquired as a resource * added vmtrace_pt_size parameter in xl.cfg, the size of trace buffer must be specified in the moment of domain creation * trace buffers are allocated on domain creation, destructed on domain destruction * HVMOP_vmtrace_ipt_enable/disable is limited to enabling/disabling PT these calls don't manage buffer memory anymore * lifted 32 MFN/GFN array limit when acquiring resources * minor code style changes according to review Michal Leszczynski (7): xen/mm: lift 32 item limit from mfn/gfn arrays x86/vmx: add Intel PT MSR definitions x86/vmx: add IPT cpu feature x86/vmx: add do_vmtrace_op tools/libxc: add xc_vmtrace_* functions tools/libxl: add vmtrace_pt_size parameter tools/proctrace: add proctrace tool tools/golang/xenlight/helpers.gen.go | 2 + tools/golang/xenlight/types.gen.go | 1 + tools/libxc/Makefile | 1 + tools/libxc/include/xenctrl.h | 39 +++ tools/libxc/xc_vmtrace.c | 97 ++++++ tools/libxl/libxl_types.idl | 2 + tools/libxl/libxl_x86.c | 5 + tools/proctrace/COPYING | 339 ++++++++++++++++++++ tools/proctrace/Makefile | 50 +++ tools/proctrace/proctrace.c | 153 +++++++++ tools/xl/xl_parse.c | 4 + xen/arch/x86/hvm/hvm.c | 167 ++++++++++ xen/arch/x86/hvm/vmx/vmcs.c | 4 + xen/arch/x86/hvm/vmx/vmx.c | 24 ++ xen/arch/x86/mm.c | 37 +++ xen/common/domain.c | 1 + xen/common/memory.c | 39 +-- xen/include/asm-x86/cpufeature.h | 1 + xen/include/asm-x86/hvm/hvm.h | 9 + xen/include/asm-x86/hvm/vmx/vmcs.h | 17 + xen/include/asm-x86/msr-index.h | 37 +++ xen/include/public/arch-x86/cpufeatureset.h | 1 + xen/include/public/hvm/hvm_op.h | 23 ++ xen/include/public/hvm/params.h | 5 +- xen/include/public/memory.h | 1 + xen/include/xen/sched.h | 3 + 26 files changed, 1039 insertions(+), 23 deletions(-) create mode 100644 tools/libxc/xc_vmtrace.c create mode 100644 tools/proctrace/COPYING create mode 100644 tools/proctrace/Makefile create mode 100644 tools/proctrace/proctrace.c