51 lines
1.5 KiB
Diff
51 lines
1.5 KiB
Diff
diff -Naur --no-dereference a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
|
|
--- a/arch/x86/kvm/vmx/vmx.c 2024-07-01 21:03:34.000000000 +0300
|
|
+++ b/arch/x86/kvm/vmx/vmx.c 2024-07-01 20:24:05.000000000 +0300
|
|
@@ -6137,6 +6137,7 @@
|
|
[EXIT_REASON_ENCLS] = handle_encls,
|
|
[EXIT_REASON_BUS_LOCK] = handle_bus_lock_vmexit,
|
|
[EXIT_REASON_NOTIFY] = handle_notify,
|
|
+ [EXIT_REASON_RDTSC] = handle_rdtsc,
|
|
};
|
|
|
|
static const int kvm_vmx_max_exit_handlers =
|
|
|
|
diff -Naur --no-dereference a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
|
|
--- a/arch/x86/kvm/vmx/vmx.c 2024-07-01 21:03:34.000000000 +0300
|
|
+++ b/arch/x86/kvm/vmx/vmx.c 2024-07-01 20:24:05.000000000 +0300
|
|
@@ -6079,6 +6079,34 @@
|
|
return 1;
|
|
}
|
|
|
|
+static int handle_rdtsc(struct kvm_vcpu *vcpu)
|
|
+{
|
|
+ static u64 rdtsc_cur = 0;
|
|
+ static u64 rdtsc_prev = 0;
|
|
+ u64 _rdtsc = rdtsc();
|
|
+
|
|
+ printk_once("[HookEntry] fake rdtsc vmx function is working\n");
|
|
+
|
|
+ if (rdtsc_prev == 0)
|
|
+ {
|
|
+ rdtsc_cur = _rdtsc;
|
|
+ }
|
|
+ else if (_rdtsc > rdtsc_prev)
|
|
+ {
|
|
+ rdtsc_cur += (_rdtsc - rdtsc_prev) / 16;
|
|
+ }
|
|
+
|
|
+ if (rdtsc_cur > _rdtsc)
|
|
+ {
|
|
+ rdtsc_cur = _rdtsc;
|
|
+ }
|
|
+
|
|
+ rdtsc_prev = rdtsc_cur;
|
|
+ vcpu->arch.regs[VCPU_REGS_RAX] = rdtsc_cur & -1u;
|
|
+ vcpu->arch.regs[VCPU_REGS_RDX] = (rdtsc_cur >> 32) & -1u;
|
|
+ return skip_emulated_instruction(vcpu);
|
|
+}
|
|
+
|
|
/*
|
|
* The exit handlers return 1 if the exit was handled fully and guest execution
|
|
* may resume. Otherwise they set the kvm_run parameter to indicate what needs
|