Re: [PATCH v6 15/36] KVM: x86: Fix compute_guest_tsc() to handle negative time deltas

[David Woodhouse]

On Fri, 2026-07-24 at 14:27 -0700, Sean Christopherson wrote:
> 
> To cut down on the duplicate code, and IMO to make it easier to identify the
> differences, how about this?
> 
> 	s64 delta_ns = kernel_ns - vcpu->arch.this_tsc_nsec;
> 	u64 tsc;
> 	
> 	/* Handle negative deltas gracefully (master clock ref may be earlier) */
> 	tsc = pvclock_scale_delta(abs(-delta_ns),
> 				  vcpu->arch.virtual_tsc_mult,
> 				  vcpu->arch.virtual_tsc_shift);
> 
> 	return vcpu->arch.this_tsc_write + (delta_ns >= 0 ? tsc : -tsc);

Oh, I missed that part. Done, rebased to kvm-x86/next and pushed to my
kvmclock7 branch while I test it and await further feedback.

Attachment: smime.p7s
Description: S/MIME cryptographic signature