From: Oliver Upton <oupton@google.com>
To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu
Cc: Marc Zyngier <maz@kernel.org>, Peter Shier <pshier@google.com>,
Ricardo Koller <ricarkol@google.com>,
Jing Zhang <jingzhangos@google.com>,
Raghavendra Rao Anata <rananta@google.com>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Andrew Jones <drjones@redhat.com>,
Oliver Upton <oupton@google.com>
Subject: [PATCH] Documentation: kvm: Document KVM_SYSTEM_EVENT_SUSPEND exit type
Date: Thu, 19 Aug 2021 23:41:42 +0000 [thread overview]
Message-ID: <20210819234142.3581631-1-oupton@google.com> (raw)
In-Reply-To: <20210819223640.3564975-1-oupton@google.com>
KVM now has the capability to exit to userspace for VM suspend events.
Document the intended UAPI behavior, such that a VMM can simply ignore
the guest intentions and resume.
Signed-off-by: Oliver Upton <oupton@google.com>
---
Documentation/virt/kvm/api.rst | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index dae68e68ca23..d4dfc6f84dfc 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -5632,6 +5632,7 @@ should put the acknowledged interrupt vector into the 'epr' field.
#define KVM_SYSTEM_EVENT_SHUTDOWN 1
#define KVM_SYSTEM_EVENT_RESET 2
#define KVM_SYSTEM_EVENT_CRASH 3
+ #define KVM_SYSTEM_EVENT_SUSPEND 4
__u32 type;
__u64 flags;
} system_event;
@@ -5656,6 +5657,10 @@ Valid values for 'type' are:
has requested a crash condition maintenance. Userspace can choose
to ignore the request, or to gather VM memory core dump and/or
reset/shutdown of the VM.
+ - KVM_SYSTEM_EVENT_SUSPEND -- the guest has requested that the VM
+ suspends. Userspace is not obliged to honor this, and may call KVM_RUN
+ again. Doing so will cause the guest to resume at its requested entry
+ point.
::
--
2.33.0.rc2.250.ged5fa647cd-goog
next prev parent reply other threads:[~2021-08-19 23:42 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-19 22:36 [PATCH 0/6] KVM: arm64: Implement PSCI SYSTEM_SUSPEND support Oliver Upton
2021-08-19 22:36 ` [PATCH 1/6] KVM: arm64: Drop unused vcpu param to kvm_psci_valid_affinity() Oliver Upton
2021-08-19 22:36 ` [PATCH 2/6] KVM: arm64: Clean up SMC64 PSCI filtering for AArch32 guests Oliver Upton
2021-08-19 22:36 ` [PATCH 3/6] KVM: arm64: Encapsulate reset request logic in a helper function Oliver Upton
2021-08-19 22:36 ` [PATCH 4/6] KVM: arm64: Add support for SYSTEM_SUSPEND PSCI call Oliver Upton
2021-08-19 22:36 ` [PATCH 5/6] selftests: KVM: Promote PSCI hypercalls to asm volatile Oliver Upton
2021-08-19 22:36 ` [PATCH 6/6] selftests: KVM: Test SYSTEM_SUSPEND PSCI call Oliver Upton
2021-08-19 23:41 ` Oliver Upton [this message]
2021-08-22 19:56 ` [PATCH 0/6] KVM: arm64: Implement PSCI SYSTEM_SUSPEND support Oliver Upton
2021-08-26 10:51 ` Marc Zyngier
2021-08-26 18:37 ` Oliver Upton
2021-08-27 21:58 ` [RFC kvmtool PATCH 0/2] " Oliver Upton
2021-08-27 21:58 ` [RFC kvmtool PATCH 1/2] TESTONLY: KVM: Update KVM headers Oliver Upton
2021-08-27 21:58 ` [RFC kvmtool PATCH 2/2] arm64: Add support for KVM_CAP_ARM_SYSTEM_SUSPEND Oliver Upton
2021-09-06 9:12 ` [PATCH 0/6] KVM: arm64: Implement PSCI SYSTEM_SUSPEND support Marc Zyngier
2021-09-07 16:30 ` Oliver Upton
2021-09-07 17:43 ` Marc Zyngier
2021-09-07 18:14 ` Oliver Upton
2021-09-21 9:45 ` Marc Zyngier
2021-09-21 18:22 ` Oliver Upton
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=20210819234142.3581631-1-oupton@google.com \
--to=oupton@google.com \
--cc=alexandru.elisei@arm.com \
--cc=drjones@redhat.com \
--cc=james.morse@arm.com \
--cc=jingzhangos@google.com \
--cc=kvm@vger.kernel.org \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=maz@kernel.org \
--cc=pshier@google.com \
--cc=rananta@google.com \
--cc=ricarkol@google.com \
--cc=suzuki.poulose@arm.com \
/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;
as well as URLs for NNTP newsgroup(s).