On 26/09/24 17:05, Adrian Hunter wrote: > On 6/09/24 16:00, Adrian Hunter wrote: >> Hi >> >> There is a long-standing problem whereby running Intel PT on host and guest >> in Host/Guest mode, causes VM-Entry failure. >> >> The motivation for this patch set is to provide a fix for stable kernels >> prior to the advent of the "Mediated Passthrough vPMU" patch set: >> >> https://lore.kernel.org/kvm/20240801045907.4010984-1-mizhang@xxxxxxxxxx/ >> >> which would render a large part of the fix unnecessary but likely not be >> suitable for backport to stable due to its size and complexity. >> >> Ideally, this patch set would be applied before "Mediated Passthrough vPMU" >> >> Note that the fix does not conflict with "Mediated Passthrough vPMU", it >> is just that "Mediated Passthrough vPMU" will make the code to stop and >> restart Intel PT unnecessary. > > Any comments? Any comments? > >> >> >> Adrian Hunter (3): >> KVM: x86: Fix Intel PT IA32_RTIT_CTL MSR validation >> KVM: x86: Fix Intel PT Host/Guest mode when host tracing also >> KVM: selftests: Add guest Intel PT test >> >> arch/x86/events/intel/pt.c | 131 ++++++- >> arch/x86/events/intel/pt.h | 10 + >> arch/x86/include/asm/intel_pt.h | 4 + >> arch/x86/kvm/vmx/vmx.c | 26 +- >> arch/x86/kvm/vmx/vmx.h | 1 - >> tools/testing/selftests/kvm/Makefile | 1 + >> .../selftests/kvm/include/x86_64/processor.h | 1 + >> tools/testing/selftests/kvm/x86_64/intel_pt.c | 381 +++++++++++++++++++++ >> 8 files changed, 532 insertions(+), 23 deletions(-) >> create mode 100644 tools/testing/selftests/kvm/x86_64/intel_pt.c >> >> base-commit: d45aab436cf06544abeeffc607110f559a3af3b4 >> >> >> Regards >> Adrian >
