search for: debugctlmsr

Passthrough the MSR_IA32_DEBUGCTLMSR to the guest, and take advantage of the hardware VT-x feature to auto switch the msr upon VMExit and VMEntry. Signed-off-by: Wei Wang <wei.w.wang at intel.com> --- arch/x86/kvm/vmx.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/...

Hi, Attached patch implements the VMCB cleanbits SVM feature. Upcoming AMD CPUs introduce them and they are basically hints for the CPU which vmcb values can be re-used from the previous VMRUN instruction. Each bit represents a certain set of fields in the VMCB. Setting a bit tells the cpu it can re-use the cached value from the previous VMRUN. Clearing a bit tells the cpu to reload the values

...ping each LBR stack MSR access, the MSRs are passthroughed to the guest. Those MSRs are switched (i.e. load and saved) on VMExit and VMEntry. Test: Try "perf record -b ./test_program" on guest. Wei Wang (4): KVM/vmx: re-write the msr auto switch feature KVM/vmx: auto switch MSR_IA32_DEBUGCTLMSR perf/x86: add a function to get the lbr stack KVM/vmx: enable lbr for the guest arch/x86/events/intel/lbr.c | 23 +++++++ arch/x86/include/asm/perf_event.h | 14 ++++ arch/x86/kvm/vmx.c | 135 +++++++++++++++++++++++++++++++++----- 3 files changed, 154 insertions(+), 18...

...ping each LBR stack MSR access, the MSRs are passthroughed to the guest. Those MSRs are switched (i.e. load and saved) on VMExit and VMEntry. Test: Try "perf record -b ./test_program" on guest. Wei Wang (4): KVM/vmx: re-write the msr auto switch feature KVM/vmx: auto switch MSR_IA32_DEBUGCTLMSR perf/x86: add a function to get the lbr stack KVM/vmx: enable lbr for the guest arch/x86/events/intel/lbr.c | 23 +++++++ arch/x86/include/asm/perf_event.h | 14 ++++ arch/x86/kvm/vmx.c | 135 +++++++++++++++++++++++++++++++++----- 3 files changed, 154 insertions(+), 18...

Hi, this is a series of patches that unify the struct desc_struct and friends across x86_64 and i386. As usual, it provides paravirt capabilities as a side-effect for x86_64. I consider the main goal, namely, of unifying the desc_struct, an ongoing effort, being this the beginning. A lot of old code has to be touched to accomplish that. I don't consider this patch ready for inclusion.

Hi, this is a series of patches that unify the struct desc_struct and friends across x86_64 and i386. As usual, it provides paravirt capabilities as a side-effect for x86_64. I consider the main goal, namely, of unifying the desc_struct, an ongoing effort, being this the beginning. A lot of old code has to be touched to accomplish that. I don't consider this patch ready for inclusion.