linux-kernel - [PATCH 0/2] x86: notify hypervisor/VMM about guest entering s2idle

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Date:   Thu,  9 Jun 2022 11:03:26 +0000
From:   Grzegorz Jaszczyk <jaz@...ihalf.com>
To:     linux-kernel@...r.kernel.org
Cc:     jaz@...ihalf.com, dmy@...ihalf.com,
        Paolo Bonzini <pbonzini@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
        "H. Peter Anvin" <hpa@...or.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>, Pavel Machek <pavel@....cz>,
        Steve Rutherford <srutherford@...gle.com>,
        Zide Chen <zide.chen@...el.corp-partner.google.com>,
        Peter Fang <peter.fang@...el.corp-partner.google.com>,
        Ashish Kalra <ashish.kalra@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Pratik Vishwakarma <Pratik.Vishwakarma@....com>,
        Hans de Goede <hdegoede@...hat.com>,
        Alex Deucher <alexander.deucher@....com>,
        Sachi King <nakato@...ato.io>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Wei Wang <wei.w.wang@...el.com>,
        Fabiano Rosas <farosas@...ux.ibm.com>,
        David Dunn <daviddunn@...gle.com>,
        Nicholas Piggin <npiggin@...il.com>,
        kvm@...r.kernel.org (open list:KERNEL VIRTUAL MACHINE (KVM)),
        linux-doc@...r.kernel.org (open list:DOCUMENTATION),
        linux-acpi@...r.kernel.org (open list:ACPI),
        linux-pm@...r.kernel.org (open list:HIBERNATION (aka Software Suspend,
        aka swsusp))
Subject: [PATCH 0/2] x86: notify hypervisor/VMM about guest entering s2idle

This patchset introduces support which allows to notify first the
hypervisor about guest entering the s2idle state (patch #1) and second
propagate this notification to user-space so the VMM can take advantage
of such notification (patch #2).

Please see individual patches and commit logs for more verbose description.

Zide Chen (2):
  x86: notify hypervisor about guest entering s2idle state
  KVM: x86: notify user space about guest entering s2idle

 Documentation/virt/kvm/api.rst            | 21 +++++++++++++++++++++
 Documentation/virt/kvm/x86/hypercalls.rst |  7 +++++++
 arch/x86/include/asm/kvm_host.h           |  2 ++
 arch/x86/kvm/x86.c                        | 18 ++++++++++++++++++
 drivers/acpi/x86/s2idle.c                 |  8 ++++++++
 include/linux/suspend.h                   |  1 +
 include/uapi/linux/kvm.h                  |  2 ++
 include/uapi/linux/kvm_para.h             |  1 +
 kernel/power/suspend.c                    |  4 ++++
 tools/include/uapi/linux/kvm.h            |  1 +
 10 files changed, 65 insertions(+)

-- 
2.36.1.476.g0c4daa206d-goog