On Tue, Jul 06, 2021, Paolo Bonzini wrote:
On 03/07/21 00:05, isaku.yamahata@xxxxxxxxx wrote:
From: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
Introduce a per-vm variable initial_tsc_khz to hold the default tsc_khz
This field is going to be used by TDX since TSC frequency for TD guest
is configured at TD VM initialization phase.
Signed-off-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/x86.c | 3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
So this means disabling TSC frequency scaling on TDX.
Would it make sense
to delay VM creation to a separate ioctl, similar to KVM_ARM_VCPU_FINALIZE
There's an equivalent of that in the next mega-patch, the KVM_TDX_INIT_VM sub-ioctl
of KVM_MEMORY_ENCRYPT_OP. The TSC frequency for the guest gets provided at that