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Subject[PATCH v13 00/12] Intel Processor Trace virtualization enabling
Date
>From V12
- Refine the title and description of patch 1~3. -- Thomas Gleixner
- Rename the function of validate the capabilities of Intel PT. -- Thomas Gleixner
- Add more description of Intel PT work mode. -- Alexander Shishkin

>From V11:
- In patch 3, arguments caps vs. cap is not good. Spell second one out. -- Thomas Gleixner

>From V10: (This version don't have code change)
- move the patch 5 in version 9 to patch 3 (reorder patch 5) -- Alexander Shishkin
- refind the patch description of patch 5 (add new capability for Intel PT) -- Alexander Shishkin
- CC all the maintainers, reviewers and submitters in each patch of this patch set -- Alexander Shishkin

>From V9:
- remove redundant initialize for "ctl_bitmask" in patch 9;
- do some changes for patch's description.

>From V8:
- move macro definition MSR_IA32_RTIT_ADDR_RANGE from msr-index.h to intel_pt.h;
- initialize the RTIT_CTL bitmask to ~0ULL.

>From V7:
- remove host only mode since it can be emulated by perf code;
- merge patch 8 and 9 to make code and data in the same patch;
- rename __pt_cap_get() to pt_cap_decode();
- other minor change.

>From V6:
- split pathes 1~2 to four separate patches (these patches do 2 things) and add more descriptions.

>From V5:
- rename the function from pt_cap_get_ex() to __pt_cap_get();
- replace the most of function from vmx_pt_supported() to "pt_mode == PT_MODE_HOST_GUEST"(or !=).

>From V4:
- add data check when setting the value of MSR_IA32_RTIT_CTL;
- Invoke new interface to set the intercept of MSRs read/write after "MSR bitmap per-vcpu" patches.

>From V3:
- change default mode to SYSTEM mode;
- add a new patch to move PT out of scattered features;
- add a new fucntion kvm_get_pt_addr_cnt() to get the number of address ranges;
- add a new function vmx_set_rtit_ctl() to set the value of guest RTIT_CTL, GUEST_IA32_RTIT_CTL and MSRs intercept.

>From v2:
- replace *_PT_SUPPRESS_PIP to *_PT_CONCEAL_PIP;
- clean SECONDARY_EXEC_PT_USE_GPA, VM_EXIT_CLEAR_IA32_RTIT_CTL and VM_ENTRY_LOAD_IA32_RTIT_CTL in SYSTEM mode. These bits must be all set or all clean;
- move processor tracing out of scattered features;
- add a new function to enable/disable intercept MSRs read/write;
- add all Intel PT MSRs read/write and disable intercept when PT is enabled in guest;
- disable Intel PT and enable intercept MSRs when L1 guest VMXON;
- performance optimization.
In Host only mode. we just need to save host RTIT_CTL before vm-entry and restore host RTIT_CTL after vm-exit;
In HOST_GUEST mode. we need to save and restore all MSRs only when PT has enabled in guest.
- use XSAVES/XRESTORES implement context switch.
Haven't implementation in this version and still in debuging. will make a separate patch work on this.

>From v1:
- remove guest-only mode because guest-only mode can be covered by host-guest mode;
- always set "use GPA for processor tracing" in secondary execution control if it can be;
- trap RTIT_CTL read/write. Forbid write this msr when VMXON in L1 hypervisor.

Chao Peng (7):
perf/x86/intel/pt: Move Intel PT MSRs bit defines to global header
perf/x86/intel/pt: Export pt_cap_get()
KVM: x86: Add Intel PT virtualization work mode
KVM: x86: Add Intel Processor Trace cpuid emulation
KVM: x86: Add Intel PT context switch for each vcpu
KVM: x86: Implement Intel PT MSRs read/write emulation
KVM: x86: Set intercept for Intel PT MSRs read/write

Luwei Kang (5):
perf/x86/intel/pt: Introduce intel_pt_validate_cap()
perf/x86/intel/pt: Add new bit definitions for PT MSRs
perf/x86/intel/pt: add new capability for Intel PT
KVM: x86: Introduce a function to initialize the PT configuration
KVM: x86: Disable Intel PT when VMXON in L1 guest

arch/x86/events/intel/pt.c | 60 +++---
arch/x86/events/intel/pt.h | 58 -----
arch/x86/include/asm/intel_pt.h | 39 ++++
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/include/asm/msr-index.h | 37 ++++
arch/x86/include/asm/vmx.h | 8 +
arch/x86/kvm/cpuid.c | 22 +-
arch/x86/kvm/svm.c | 6 +
arch/x86/kvm/vmx.c | 446 ++++++++++++++++++++++++++++++++++++++-
arch/x86/kvm/x86.c | 33 ++-
10 files changed, 620 insertions(+), 90 deletions(-)

--
1.8.3.1

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