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Re: [PATCH 03/13] x86/HV: Add new hvcall guest address host visibility support
- To: Joerg Roedel <joro@xxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxx>
- From: Tianyu Lan <ltykernel@xxxxxxxxx>
- Date: Mon, 2 Aug 2021 20:59:48 +0800
- Cc: kys@xxxxxxxxxxxxx, haiyangz@xxxxxxxxxxxxx, sthemmin@xxxxxxxxxxxxx, wei.liu@xxxxxxxxxx, decui@xxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, bp@xxxxxxxxx, x86@xxxxxxxxxx, hpa@xxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, luto@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, konrad.wilk@xxxxxxxxxx, boris.ostrovsky@xxxxxxxxxx, jgross@xxxxxxxx, sstabellini@xxxxxxxxxx, will@xxxxxxxxxx, davem@xxxxxxxxxxxxx, kuba@xxxxxxxxxx, jejb@xxxxxxxxxxxxx, martin.petersen@xxxxxxxxxx, arnd@xxxxxxxx, hch@xxxxxx, m.szyprowski@xxxxxxxxxxx, robin.murphy@xxxxxxx, thomas.lendacky@xxxxxxx, brijesh.singh@xxxxxxx, ardb@xxxxxxxxxx, Tianyu.Lan@xxxxxxxxxxxxx, rientjes@xxxxxxxxxx, martin.b.radev@xxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, rppt@xxxxxxxxxx, kirill.shutemov@xxxxxxxxxxxxxxx, aneesh.kumar@xxxxxxxxxxxxx, krish.sadhukhan@xxxxxxxxxx, saravanand@xxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, pgonda@xxxxxxxxxx, david@xxxxxxxxxx, keescook@xxxxxxxxxxxx, hannes@xxxxxxxxxxx, sfr@xxxxxxxxxxxxxxxx, michael.h.kelley@xxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, vkuznets@xxxxxxxxxx, anparri@xxxxxxxxxxxxx
- Delivery-date: Mon, 02 Aug 2021 13:00:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 8/2/2021 8:01 PM, Joerg Roedel wrote:
On Wed, Jul 28, 2021 at 08:29:41AM -0700, Dave Hansen wrote:
__set_memory_enc_dec() is turning into a real mess. SEV, TDX and now
Hyper-V are messing around in here.
I was going to suggest a PV_OPS call where the fitting implementation
for the guest environment can be plugged in at boot. There is TDX and an
SEV(-SNP) case, a Hyper-V case, and likely more coming up from other
cloud/hypervisor vendors. Hiding all these behind feature checks is not
going to make things cleaner.
Yes, that makes sense. I will do this in the next version.
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