david.venhoff/KVM-Nyx-fork
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Disable branches and enable return compression

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Looks like this project won't need branch information, so lets disable
generation of that to massively reduce the trace size
This commit is contained in:
David Venhoff 2025-09-04 18:34:59 +02:00
parent 5995cd75c0
commit 0911136333
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kvm/vmx/vmx_pt.c
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@ -857,7 +857,7 @@ static void vmx_pt_print_msrs(u64 ia32_rtit_ctrl_msr){
PRINT_FEATURE(ia32_rtit_ctrl_msr, ADDR3_EN, "ADDR3_CFG");
}
#endif
static inline void vmx_pt_setup_msrs(struct vcpu_vmx_pt *vmx_pt){
/* Disable: MTCEn, TSCEn, DisRTC, CYCEn, TraceEN
* Enable: OS, CR3Filtering, ToPA, BranchEN
@ -865,7 +865,7 @@ static inline void vmx_pt_setup_msrs(struct vcpu_vmx_pt *vmx_pt){
int i;
//vmx_pt->ia32_rtit_ctrl_msr = 0ULL;
WRITE_ONCE(vmx_pt->ia32_rtit_ctrl_msr, (!TRACE_EN) | CTL_OS | CTL_USER | TO_PA | PTWRITE_EN | BRANCH_EN | DIS_RETC | PSB_MASK | CYC_EN | TSC_EN);
WRITE_ONCE(vmx_pt->ia32_rtit_ctrl_msr, (!TRACE_EN) | CTL_OS | CTL_USER | TO_PA | PTWRITE_EN | PSB_MASK | CYC_EN | TSC_EN);
//vmx_pt->ia32_rtit_ctrl_msr = (!TRACE_EN) | CTL_OS | CTL_USER | TO_PA | BRANCH_EN | DIS_RETC | PSB_MASK;
for (i = 0; i < 4; i++){