Re: [PATCH v7 08/11] KVM: TDX: Get/put PAMT pages when (un)mapping private memory

"Edgecombe, Rick P" <[email protected]> Wed, 22 Jul 2026 19:51:16 +0000

Newsgroups	dev.linux.lists.linux-coco,org.kernel.vger.kvm,org.kernel.vger.linux-doc,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>

On Wed, 2026-07-22 at 12:34 -0700, Sean Christopherson wrote:
> Maybe put it in code?  E.g.
> 
> 	/*
> 	 * Minus one page to exclude the root SPT, but plus one page for a
> 	 * possible 4KiB private mapping.
> 	 */
> 	min_nr_spts += -1 + 1;
> 
> 	return tdx_topup_pamt_cache(&to_tdx(vcpu)->pamt_cache, min_nr_spts);

Haha, yea. I felt too silly writing that code. But I'm ok. This has definitely
had enough confusion over the versions to warrant something.