From: Ashish Kalra <ashish.kalra@amd.com>
To: pbonzini@redhat.com
Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
joro@8bytes.org, bp@suse.de, thomas.lendacky@amd.com,
x86@kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, srutherford@google.com,
seanjc@google.com, venu.busireddy@oracle.com,
brijesh.singh@amd.com
Subject: Re: [PATCH v2 0/4] Add guest support for SEV live migration.
Date: Fri, 30 Apr 2021 07:19:28 +0000 [thread overview]
Message-ID: <20210430071927.GA8033@ashkalra_ubuntu_server> (raw)
In-Reply-To: <cover.1619193043.git.ashish.kalra@amd.com>
Hello Boris, Paolo,
Do you have additional comments, feedback on this updated patchset ?
Thanks,
Ashish
On Fri, Apr 23, 2021 at 03:57:37PM +0000, Ashish Kalra wrote:
> From: Ashish Kalra <ashish.kalra@amd.com>
>
> The series adds guest support for SEV live migration.
>
> The patch series introduces a new hypercall. The guest OS can use this
> hypercall to notify the page encryption status. If the page is encrypted
> with guest specific-key then we use SEV command during the migration.
> If page is not encrypted then fallback to default.
>
> This section descibes how the SEV live migration feature is negotiated
> between the host and guest, the host indicates this feature support via
> KVM_FEATURE_CPUID. The guest firmware (OVMF) detects this feature and
> sets a UEFI enviroment variable indicating OVMF support for live
> migration, the guest kernel also detects the host support for this
> feature via cpuid and in case of an EFI boot verifies if OVMF also
> supports this feature by getting the UEFI enviroment variable and if it
> set then enables live migration feature on host by writing to a custom
> MSR, if not booted under EFI, then it simply enables the feature by
> again writing to the custom MSR.
>
> Changes since v1:
> - Avoid having an SEV specific variant of kvm_hypercall3() and instead
> invert the default to VMMCALL.
>
> Ashish Kalra (3):
> KVM: x86: invert KVM_HYPERCALL to default to VMMCALL
> EFI: Introduce the new AMD Memory Encryption GUID.
> x86/kvm: Add guest support for detecting and enabling SEV Live
> Migration feature.
>
> Brijesh Singh (1):
> mm: x86: Invoke hypercall when page encryption status is changed
>
> arch/x86/include/asm/kvm_para.h | 2 +-
> arch/x86/include/asm/mem_encrypt.h | 4 +
> arch/x86/include/asm/paravirt.h | 6 ++
> arch/x86/include/asm/paravirt_types.h | 2 +
> arch/x86/include/asm/set_memory.h | 2 +
> arch/x86/kernel/kvm.c | 106 ++++++++++++++++++++++++++
> arch/x86/kernel/paravirt.c | 1 +
> arch/x86/mm/mem_encrypt.c | 72 ++++++++++++++---
> arch/x86/mm/pat/set_memory.c | 7 ++
> include/linux/efi.h | 1 +
> 10 files changed, 193 insertions(+), 10 deletions(-)
>
> --
> 2.17.1
>
next prev parent reply other threads:[~2021-04-30 7:19 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-23 15:57 [PATCH v2 0/4] Add guest support for SEV live migration Ashish Kalra
2021-04-23 15:58 ` [PATCH v2 1/4] KVM: x86: invert KVM_HYPERCALL to default to VMMCALL Ashish Kalra
2021-04-23 16:31 ` Jim Mattson
2021-04-23 17:44 ` Sean Christopherson
2021-04-23 15:58 ` [PATCH v2 2/4] mm: x86: Invoke hypercall when page encryption status is changed Ashish Kalra
2021-05-12 13:15 ` Borislav Petkov
2021-05-12 15:51 ` Sean Christopherson
2021-05-12 16:23 ` Borislav Petkov
2021-05-13 6:57 ` Ashish Kalra
2021-05-13 8:40 ` Paolo Bonzini
2021-05-13 13:49 ` Tom Lendacky
2021-05-13 4:34 ` Ashish Kalra
2021-05-14 7:33 ` Borislav Petkov
2021-05-14 8:03 ` Paolo Bonzini
2021-05-14 9:05 ` Ashish Kalra
2021-05-14 9:34 ` Borislav Petkov
2021-05-14 10:05 ` Ashish Kalra
2021-05-14 10:38 ` Borislav Petkov
2021-05-18 2:01 ` Steve Rutherford
2021-05-19 12:06 ` Ashish Kalra
2021-05-19 13:44 ` Paolo Bonzini
2021-05-14 9:57 ` Paolo Bonzini
2021-05-14 9:24 ` Borislav Petkov
2021-05-14 9:33 ` Ashish Kalra
2021-05-19 23:29 ` Andy Lutomirski
2021-05-19 23:44 ` Sean Christopherson
2021-04-23 15:59 ` [PATCH v2 3/4] EFI: Introduce the new AMD Memory Encryption GUID Ashish Kalra
2021-05-12 13:19 ` Borislav Petkov
2021-05-12 14:53 ` Ard Biesheuvel
2021-05-13 4:36 ` Ashish Kalra
2021-04-23 15:59 ` [PATCH v2 4/4] x86/kvm: Add guest support for detecting and enabling SEV Live Migration feature Ashish Kalra
2021-04-30 7:19 ` Ashish Kalra [this message]
2021-04-30 7:40 ` [PATCH v2 0/4] Add guest support for SEV live migration Paolo Bonzini
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