From: Thomas Gleixner <tglx@linutronix.de>
To: Michael Kelley <mhklinux@outlook.com>,
"lirongqing@baidu.com" <lirongqing@baidu.com>,
"seanjc@google.com" <seanjc@google.com>,
"kys@microsoft.com" <kys@microsoft.com>,
"haiyangz@microsoft.com" <haiyangz@microsoft.com>,
"wei.liu@kernel.org" <wei.liu@kernel.org>,
"decui@microsoft.com" <decui@microsoft.com>,
"mingo@redhat.com" <mingo@redhat.com>,
"bp@alien8.de" <bp@alien8.de>,
"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
"x86@kernel.org" <x86@kernel.org>,
"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH] clockevents/drivers/i8253: Do not zero timer counter in shutdown
Date: Thu, 01 Aug 2024 20:54:37 +0200 [thread overview]
Message-ID: <87o76c2hw2.ffs@tglx> (raw)
In-Reply-To: <SN6PR02MB41571AE611E7D249DABFE56DD4B22@SN6PR02MB4157.namprd02.prod.outlook.com>
On Thu, Aug 01 2024 at 16:14, Michael Kelley wrote:
> From: Thomas Gleixner <tglx@linutronix.de> Sent: Thursday, August 1, 2024 7:21 AM
> FWIW, in Hyper-V guests with the Hyper-V quirk removed, tglx's new
> sequence does *not* stop the PIT. But this sequence does:
>
> outb_p(0x30, PIT_MODE);
> outb_p(0xff, PIT_CH0);
> outb_p(0xff, PIT_CH0);
>
> outb_p(0x30, PIT_MODE);
> outb_p(0xff, PIT_CH0);
That works on bare metal too
> I don't have a convenient way to test my sequence on KVM.
But still fails in KVM
Thanks,
tglx
next prev parent reply other threads:[~2024-08-01 18:54 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-07 1:14 [PATCH] clockevents/drivers/i8253: Do not zero timer counter in shutdown lirongqing
2023-02-08 1:04 ` Michael Kelley (LINUX)
2023-02-08 15:04 ` Sean Christopherson
2023-02-24 9:45 ` Li,Rongqing
[not found] ` <3b8496c071214bda9e5ecfa048f18ab9@baidu.com>
2023-04-13 1:28 ` Wei Liu
[not found] ` <1311175816673.202304.ZDdawTGHoa/UH20U@liuwe-devbox-debian-v2>
2023-04-14 5:17 ` Li,Rongqing
2024-08-01 9:00 ` David Woodhouse
2024-08-01 15:22 ` David Woodhouse
2024-08-01 21:07 ` Thomas Gleixner
2024-08-01 21:10 ` David Woodhouse
2024-08-01 14:21 ` Thomas Gleixner
2024-08-01 16:14 ` Michael Kelley
2024-08-01 18:54 ` Thomas Gleixner [this message]
2024-08-02 8:21 ` David Woodhouse
2024-08-02 14:55 ` Sean Christopherson
2024-08-02 15:04 ` David Woodhouse
2024-08-12 23:59 ` Sean Christopherson
2024-08-13 6:39 ` David Woodhouse
2024-08-01 17:49 ` David Woodhouse
2024-08-01 18:25 ` David Woodhouse
2024-08-01 18:57 ` Thomas Gleixner
2024-08-02 8:07 ` David Woodhouse
2024-08-02 10:49 ` Thomas Gleixner
2024-08-02 11:04 ` David Woodhouse
2024-08-02 13:27 ` Thomas Gleixner
2024-08-02 13:46 ` David Woodhouse
2024-08-01 19:06 ` Thomas Gleixner
2024-08-01 19:21 ` David Woodhouse
2024-08-01 20:00 ` Thomas Gleixner
2024-08-01 20:49 ` David Woodhouse
2024-08-01 21:22 ` Thomas Gleixner
2024-08-01 21:31 ` David Woodhouse
2024-08-02 9:55 ` David Woodhouse
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