From: Kishen Maloor <kishen.maloor@intel.com>
To: Tony Lindgren <tony.lindgren@linux.intel.com>,
Artem Bityutskiy <dedekind1@gmail.com>
Cc: "Peter Xu" <peterx@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Sean Christopherson" <seanjc@google.com>,
"Fabiano Rosas" <farosas@suse.de>,
"Jon Grimm" <Jon.Grimm@amd.com>,
"Pankaj Gupta" <pankaj.gupta@amd.com>,
"Tom Lendacky" <thomas.lendacky@amd.com>,
"Marc Zyngier" <maz@kernel.org>,
"Oliver Upton" <oliver.upton@linux.dev>,
"Steven Price" <steven.price@arm.com>,
"Anup Patel" <anup@brainfault.org>,
"Samuel Ortiz" <sameo@rivosinc.com>,
"Jakub Růžička" <jakub.ruzicka@matfyz.cz>,
"Jörg Rödel" <joro@8bytes.org>,
"Vishal Annapurve" <vannapurve@google.com>,
"Elena Reshetova" <elena.reshetova@intel.com>,
"Kai Huang" <kai.huang@intel.com>,
"Mika Westerberg" <mika.westerberg@linux.intel.com>,
"Peter Fang" <peter.fang@intel.com>,
"Rick Edgecombe" <rick.p.edgecombe@intel.com>,
"Xiaoyao Li" <xiaoyao.li@intel.com>,
"Xu Yilun" <yilun.xu@linux.intel.com>,
kvm@vger.kernel.org
Subject: Re: [RFC PATCH v2 0/4] Add KVM API for confidential guest live migration
Date: Thu, 15 Oct 2026 20:56:41 -0700 [thread overview]
Message-ID: <48a48d12-4db9-4cb4-996b-8a862aad67ec@intel.com> (raw)
In-Reply-To: <asiFmhftFi-Yq_z4@tlindgre-MOBL1>
On 10/8/26 11:11 PM, Tony Lindgren wrote:
> On Fri, Sep 18, 2026 at 03:46:32PM +0300, Artem Bityutskiy wrote:
>> In general, I feel like if buffer size is not enough, the uAPI could fill it
>> with as much data as fits, and communicate back about what GPAs were
>> exported. The caller could export the rest separately.
>
> For the "communicate back about what GPAs were exported" part, how about
> we add a u8 status array for the GPAs with the following generic values:
>
> PENDING 0
> DONE 1
> RETRY 2
> SKIPPED 3
> FAILED 4
>
> Memory transfer functions can report how many GPAs got transferred
> (DONE and SKIPPED). A failed transfer can return an error and could
> also set the FAILED state for the GPA entry where it makes sense.
>
> The status could be also stuffed into the unused bits of the address
> if that's preferred.
How might this information be used by userspace? Thus far, we haven't
had a need for it AFAIU. From the userspace vantage point, the call
either succeeds or fails.
next prev parent reply other threads:[~2026-10-16 3:56 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-31 7:13 [RFC PATCH v2 0/4] Add KVM API for confidential guest live migration Tony Lindgren
2026-08-31 7:13 ` [RFC PATCH v2 1/4] Documentation: KVM: Add live migration API for confidential guests Tony Lindgren
2026-08-31 7:20 ` sashiko-bot
2026-09-18 11:35 ` Peter Xu
2026-09-21 4:20 ` Tony Lindgren
2026-09-24 1:50 ` Wei Wang
2026-09-24 4:51 ` Tony Lindgren
2026-08-31 7:13 ` [RFC PATCH v2 2/4] KVM: x86: Add optional KVM_CAP_LIVE_MIGRATION and KVM_MIGRATE_CMD Tony Lindgren
2026-08-31 7:23 ` sashiko-bot
2026-09-01 6:03 ` Tony Lindgren
2026-09-07 11:53 ` Tony Lindgren
2026-09-07 13:15 ` Jörg Rödel
2026-09-07 13:32 ` Artem Bityutskiy
2026-09-08 4:15 ` Tony Lindgren
2026-09-08 4:43 ` Tony Lindgren
2026-09-09 0:22 ` Kishen Maloor
2026-09-09 6:57 ` Tony Lindgren
2026-09-10 1:11 ` Kishen Maloor
2026-09-10 6:33 ` Tony Lindgren
2026-09-11 1:40 ` Kishen Maloor
2026-09-11 4:23 ` Tony Lindgren
2026-09-15 0:14 ` Kishen Maloor
2026-09-15 4:44 ` Tony Lindgren
2026-09-15 15:53 ` Kishen Maloor
2026-09-16 5:09 ` Tony Lindgren
2026-09-17 3:31 ` Kishen Maloor
2026-09-17 6:42 ` Tony Lindgren
2026-09-18 4:32 ` Kishen Maloor
2026-09-18 5:58 ` Tony Lindgren
2026-09-21 0:13 ` Kishen Maloor
2026-09-21 6:52 ` Tony Lindgren
2026-09-21 9:24 ` Tony Lindgren
2026-09-21 10:58 ` Tony Lindgren
2026-09-22 3:57 ` Kishen Maloor
2026-09-22 5:25 ` Tony Lindgren
2026-09-23 0:38 ` Kishen Maloor
2026-09-23 6:04 ` Tony Lindgren
2026-09-24 5:53 ` Kishen Maloor
2026-09-24 6:59 ` Tony Lindgren
2026-09-18 4:33 ` Kishen Maloor
2026-09-21 5:58 ` Tony Lindgren
2026-09-21 6:56 ` Tony Lindgren
2026-09-22 3:56 ` Kishen Maloor
2026-09-22 6:27 ` Tony Lindgren
2026-09-23 0:37 ` Kishen Maloor
2026-09-23 6:50 ` Tony Lindgren
2026-09-24 5:34 ` Kishen Maloor
2026-09-24 7:15 ` Tony Lindgren
2026-10-08 9:22 ` Tony Lindgren
2026-10-16 4:00 ` Kishen Maloor
2026-08-31 7:13 ` [RFC PATCH v2 3/4] KVM: x86: Add optional KVM_EXPORT_MEMORY and KVM_IMPORT_MEMORY Tony Lindgren
2026-08-31 7:23 ` sashiko-bot
2026-09-01 6:10 ` Tony Lindgren
2026-08-31 7:13 ` [RFC PATCH v2 4/4] KVM: x86: Add optional KVM_EXPORT_VCPU and KVM_IMPORT_VCPU Tony Lindgren
2026-08-31 7:23 ` sashiko-bot
2026-09-01 6:12 ` Tony Lindgren
2026-09-04 18:24 ` [RFC PATCH v2 0/4] Add KVM API for confidential guest live migration Artem Bityutskiy
2026-09-17 21:27 ` Peter Xu
2026-09-18 12:46 ` Artem Bityutskiy
2026-09-18 15:53 ` Peter Xu
2026-09-22 8:09 ` Artem Bityutskiy
2026-09-22 9:42 ` Tony Lindgren
2026-09-22 11:54 ` Artem Bityutskiy
2026-09-23 4:20 ` Tony Lindgren
2026-09-22 21:18 ` Peter Xu
2026-09-23 12:05 ` Artem Bityutskiy
2026-09-24 21:19 ` Peter Xu
2026-09-28 14:15 ` Artem Bityutskiy
2026-09-29 21:05 ` Peter Xu
2026-10-02 19:57 ` Artem Bityutskiy
2026-10-07 20:00 ` Peter Xu
2026-09-23 15:28 ` Serge Hallyn (AMD)
2026-10-09 6:11 ` Tony Lindgren
2026-10-16 3:56 ` Kishen Maloor [this message]
2026-09-20 23:56 ` Kishen Maloor
2026-09-23 21:36 ` Peter Xu
2026-09-24 4:27 ` Kishen Maloor
2026-09-25 14:18 ` Peter Xu
2026-09-29 1:28 ` Kishen Maloor
2026-09-30 20:42 ` Peter Xu
2026-10-07 4:27 ` Kishen Maloor
2026-10-07 20:13 ` Peter Xu
2026-10-08 6:23 ` Tony Lindgren
2026-10-08 14:31 ` Peter Xu
2026-10-09 4:29 ` Tony Lindgren
2026-10-16 4:02 ` Kishen Maloor
2026-09-18 18:36 ` Ionut Mihalcea
2026-09-21 4:35 ` Tony Lindgren
2026-09-25 16:03 ` Serge Hallyn (AMD)
2026-09-28 3:24 ` Kishen Maloor
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