From: David Edmondson <dme@dme.org>
To: Hikaru Nishida <hikalium@chromium.org>, kvm@vger.kernel.org
Cc: suleiman@google.com, Hikaru Nishida <hikalium@chromium.org>,
Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>,
Ingo Molnar <mingo@redhat.com>, Jim Mattson <jmattson@google.com>,
Joerg Roedel <joro@8bytes.org>,
John Stultz <john.stultz@linaro.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Stephen Boyd <sboyd@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: [RFC PATCH 2/6] x86/kvm: Add a struct and constants for virtual suspend time injection
Date: Tue, 27 Apr 2021 16:14:46 +0100 [thread overview]
Message-ID: <cunh7jrkbdl.fsf@dme.org> (raw)
In-Reply-To: <20210426090644.2218834-3-hikalium@chromium.org>
On Monday, 2021-04-26 at 18:06:41 +09, Hikaru Nishida wrote:
> This patch adds definitions that are needed by both host and guest
s/This patch adds/Add/
> to implement virtual suspend time injection.
> This patch also adds #include <linux/kvm_host.h> in
s/This patch also adds/Also add/
> kernel/time/timekeeping.c to make necesarily functions which will be
s/necesarily/necessary/
> introduced in later patches available.
>
> Signed-off-by: Hikaru Nishida <hikalium@chromium.org>
> ---
>
> arch/x86/include/uapi/asm/kvm_para.h | 6 ++++++
> kernel/time/timekeeping.c | 1 +
> 2 files changed, 7 insertions(+)
>
> diff --git a/arch/x86/include/uapi/asm/kvm_para.h b/arch/x86/include/uapi/asm/kvm_para.h
> index 950afebfba88..13788b01094f 100644
> --- a/arch/x86/include/uapi/asm/kvm_para.h
> +++ b/arch/x86/include/uapi/asm/kvm_para.h
> @@ -33,6 +33,7 @@
> #define KVM_FEATURE_PV_SCHED_YIELD 13
> #define KVM_FEATURE_ASYNC_PF_INT 14
> #define KVM_FEATURE_MSI_EXT_DEST_ID 15
> +#define KVM_FEATURE_HOST_SUSPEND_TIME 16
>
> #define KVM_HINTS_REALTIME 0
>
> @@ -54,6 +55,7 @@
> #define MSR_KVM_POLL_CONTROL 0x4b564d05
> #define MSR_KVM_ASYNC_PF_INT 0x4b564d06
> #define MSR_KVM_ASYNC_PF_ACK 0x4b564d07
> +#define MSR_KVM_HOST_SUSPEND_TIME 0x4b564d08
>
> struct kvm_steal_time {
> __u64 steal;
> @@ -64,6 +66,10 @@ struct kvm_steal_time {
> __u32 pad[11];
> };
>
> +struct kvm_host_suspend_time {
> + __u64 suspend_time_ns;
> +};
> +
> #define KVM_VCPU_PREEMPTED (1 << 0)
> #define KVM_VCPU_FLUSH_TLB (1 << 1)
>
> diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
> index 6aee5768c86f..ff0304de7de9 100644
> --- a/kernel/time/timekeeping.c
> +++ b/kernel/time/timekeeping.c
> @@ -22,6 +22,7 @@
> #include <linux/pvclock_gtod.h>
> #include <linux/compiler.h>
> #include <linux/audit.h>
> +#include <linux/kvm_host.h>
>
> #include "tick-internal.h"
> #include "ntp_internal.h"
> --
> 2.31.1.498.g6c1eba8ee3d-goog
dme.
--
Too much information, running through my brain.
next prev parent reply other threads:[~2021-04-27 15:14 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-26 9:06 [RFC PATCH 0/6] x86/kvm: Virtual suspend time injection support Hikaru Nishida
2021-04-26 9:06 ` [RFC PATCH 1/6] x86/kvm: Reserve KVM_FEATURE_HOST_SUSPEND_TIME and MSR_KVM_HOST_SUSPEND_TIME Hikaru Nishida
2021-04-27 15:12 ` David Edmondson
2021-04-26 9:06 ` [RFC PATCH 2/6] x86/kvm: Add a struct and constants for virtual suspend time injection Hikaru Nishida
2021-04-27 15:14 ` David Edmondson [this message]
2021-04-26 9:06 ` [RFC PATCH 3/6] x86/kvm: Add CONFIG_KVM_VIRT_SUSPEND_TIMING Hikaru Nishida
2021-04-26 9:06 ` [RFC PATCH 4/6] x86/kvm: Add a host side support for virtual suspend time injection Hikaru Nishida
2021-04-27 15:20 ` David Edmondson
2021-04-26 9:06 ` [RFC PATCH 5/6] x86/kvm: Add CONFIG_KVM_VIRT_SUSPEND_TIMING_GUEST Hikaru Nishida
2021-04-26 9:06 ` [RFC PATCH 6/6] x86/kvm: Add a guest side support for virtual suspend time injection Hikaru Nishida
2021-04-26 14:21 ` Thomas Gleixner
2021-04-26 13:15 ` [RFC PATCH 0/6] x86/kvm: Virtual suspend time injection support Maxim Levitsky
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