From: Tejun Heo <tj@kernel.org>
To: Brijesh Singh <brijesh.singh@amd.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
kvm@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
Borislav Petkov <bp@suse.de>, Andy Lutomirski <luto@kernel.org>,
Tom Lendacky <thomas.lendacky@amd.com>,
Arnd Bergmann <arnd@arndb.de>, Christoph Lameter <cl@linux.com>,
linux-arch@vger.kernel.org
Subject: Re: [Part1 PATCH v4 15/17] percpu: introduce DEFINE_PER_CPU_UNENCRYPTED
Date: Mon, 18 Sep 2017 20:13:44 -0700 [thread overview]
Message-ID: <20170919031344.GL378890@devbig577.frc2.facebook.com> (raw)
In-Reply-To: <20170916123418.37807-16-brijesh.singh@amd.com>
On Sat, Sep 16, 2017 at 07:34:16AM -0500, Brijesh Singh wrote:
> When SEV is active, memory is encrypted with guest-specific key, and if
> guest OS wants to share the memory region with hypervisor then it must
> clear the C-bit (i.e set unencrypted) before sharing it.
>
> DEFINE_PER_CPU_UNENCRYPTED can be used to define the per-cpu variables
> which will be shared between guest and hypervisor. Currently, KVM defines
> three variables (steal-time, apf_reason, and avic_eio) which are shared
> with hypervisor.
>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> Cc: Borislav Petkov <bp@suse.de>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Tejun Heo <tj@kernel.org>
> Cc: Christoph Lameter <cl@linux.com>
> Cc: linux-arch@vger.kernel.org
> Cc: x86@kernel.org
> Cc: linux-kernel@vger.kernel.org
> Cc: Tom Lendacky <thomas.lendacky@amd.com>
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
--
tejun
next prev parent reply other threads:[~2017-09-19 3:13 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-16 12:34 [Part1 PATCH v4 00/17] x86: Secure Encrypted Virtualization (AMD) Brijesh Singh
2017-09-16 12:34 ` [Part1 PATCH v4 01/17] Documentation/x86: Add AMD Secure Encrypted Virtualization (SEV) description Brijesh Singh
2017-09-16 15:35 ` Borislav Petkov
2017-09-16 12:34 ` [Part1 PATCH v4 02/17] x86/mm: Add Secure Encrypted Virtualization (SEV) support Brijesh Singh
2017-09-17 14:02 ` Borislav Petkov
2017-09-26 19:06 ` Brijesh Singh
2017-09-16 12:34 ` [Part1 PATCH v4 03/17] x86/mm: Don't attempt to encrypt initrd under SEV Brijesh Singh
2017-09-17 14:04 ` Borislav Petkov
2017-09-16 12:34 ` [Part1 PATCH v4 04/17] x86/realmode: Don't decrypt trampoline area " Brijesh Singh
2017-09-17 14:04 ` Borislav Petkov
2017-09-16 12:34 ` [Part1 PATCH v4 05/17] x86/mm: Use encrypted access of boot related data with SEV Brijesh Singh
2017-09-17 14:05 ` Borislav Petkov
2017-09-16 12:34 ` [Part1 PATCH v4 06/17] x86/mm: Include SEV for encryption memory attribute changes Brijesh Singh
2017-09-17 14:05 ` Borislav Petkov
2017-09-16 12:34 ` [Part1 PATCH v4 07/17] x86/efi: Access EFI data as encrypted when SEV is active Brijesh Singh
2017-09-17 14:05 ` Borislav Petkov
2017-09-16 12:34 ` [Part1 PATCH v4 08/17] resource: Consolidate resource walking code Brijesh Singh
2017-09-17 14:05 ` Borislav Petkov
2017-09-16 12:34 ` [Part1 PATCH v4 09/17] resource: Provide resource struct in resource walk callback Brijesh Singh
2017-09-16 12:34 ` [Part1 PATCH v4 10/17] x86/mm, resource: Use PAGE_KERNEL protection for ioremap of memory pages Brijesh Singh
2017-09-17 14:07 ` Borislav Petkov
2017-09-26 19:11 ` Brijesh Singh
2017-09-16 12:34 ` [Part1 PATCH v4 11/17] x86/mm: DMA support for SEV memory encryption Brijesh Singh
2017-09-17 14:07 ` Borislav Petkov
2017-09-16 12:34 ` [Part1 PATCH v4 12/17] x86/boot: Add early boot support when running with SEV active Brijesh Singh
2017-09-17 14:41 ` Borislav Petkov
2017-09-26 19:10 ` Brijesh Singh
2017-09-16 12:34 ` [Part1 PATCH v4 13/17] x86/io: Unroll string I/O when SEV is active Brijesh Singh
2017-09-17 15:08 ` Borislav Petkov
2017-09-26 19:08 ` Brijesh Singh
2017-09-16 12:34 ` [Part1 PATCH v4 14/17] x86: Add support for changing memory encryption attribute in early boot Brijesh Singh
2017-09-17 15:25 ` Borislav Petkov
2017-09-16 12:34 ` [Part1 PATCH v4 15/17] percpu: introduce DEFINE_PER_CPU_UNENCRYPTED Brijesh Singh
2017-09-19 3:13 ` Tejun Heo [this message]
2017-09-19 10:39 ` Borislav Petkov
2017-09-19 13:50 ` Brijesh Singh
2017-09-20 7:34 ` Borislav Petkov
2017-09-20 16:16 ` Brijesh Singh
2017-09-16 12:34 ` [Part1 PATCH v4 16/17] X86/KVM: Unencrypt shared per-cpu variables when SEV is active Brijesh Singh
2017-09-19 11:06 ` Borislav Petkov
2017-09-19 14:00 ` Brijesh Singh
2017-09-20 7:39 ` Borislav Petkov
2017-09-16 12:34 ` [Part1 PATCH v4 17/17] X86/KVM: Clear encryption attribute " Brijesh Singh
2017-09-19 11:47 ` Borislav Petkov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170919031344.GL378890@devbig577.frc2.facebook.com \
--to=tj@kernel.org \
--cc=arnd@arndb.de \
--cc=bp@suse.de \
--cc=brijesh.singh@amd.com \
--cc=cl@linux.com \
--cc=hpa@zytor.com \
--cc=kvm@vger.kernel.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=thomas.lendacky@amd.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox