From: Paolo Bonzini <pbonzini@redhat.com>
To: "Yao, Jiewen" <jiewen.yao@intel.com>,
"Kinney, Michael D" <michael.d.kinney@intel.com>,
Laszlo Ersek <lersek@redhat.com>
Cc: "Tian, Feng" <feng.tian@intel.com>,
"Radim Kr?má?" <rkrcmar@redhat.com>,
"edk2-devel@ml01.01.org" <edk2-devel@ml01.01.org>,
"Fan, Jeff" <jeff.fan@intel.com>,
"Zeng, Star" <star.zeng@intel.com>
Subject: Re: [PATCH 0/6] Enable SMM page level protection.
Date: Fri, 4 Nov 2016 14:50:11 +0100 [thread overview]
Message-ID: <77f850d5-910e-302e-b578-7b46b55d6d3b@redhat.com> (raw)
In-Reply-To: <74D8A39837DF1E4DA445A8C0B3885C50386BE6A3@shsmsx102.ccr.corp.intel.com>
On 04/11/2016 14:28, Yao, Jiewen wrote:
> I tried below way. But it does not help too much. It still takes more
> than 1 minutes to boot with SMP=8.
>
> SendSmiIpiAllExcludingSelf ();
> IoWrite8 (ICH9_APM_STS, DataPort == NULL ? 0 : *DataPort);
> IoWrite8 (ICH9_APM_CNT, CommandPort == NULL ? 0 : *CommandPort);
>
> I also tried to reduce the timeout PCD to:
>
> gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmApSyncTimeout|1000
>
> However, I find CPU-2 is still missing.
>
> Maybe it is caused by QEMU emulate AP in serial mode, not parallel mode.
Yeah, that's possible without KVM. Do you issue a PAUSE instruction in
the spin loops? That could help.
Paolo
> I think it might be best choice to set PcdCpuSmmSyncMode|0x1
>
> It also helps cover a very corner case in SMM. J
>
next prev parent reply other threads:[~2016-11-04 13:50 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-04 2:49 [PATCH 0/6] Enable SMM page level protection Kinney, Michael D
2016-11-04 2:55 ` Yao, Jiewen
2016-11-04 3:05 ` Kinney, Michael D
2016-11-04 3:12 ` Kinney, Michael D
2016-11-04 3:20 ` Yao, Jiewen
2016-11-04 11:34 ` Paolo Bonzini
2016-11-04 13:28 ` Yao, Jiewen
2016-11-04 13:50 ` Paolo Bonzini [this message]
2016-11-04 16:34 ` Laszlo Ersek
2016-11-04 3:14 ` Yao, Jiewen
2016-11-04 16:28 ` Laszlo Ersek
-- strict thread matches above, loose matches on Subject: below --
2016-11-03 6:53 Jiewen Yao
2016-11-03 6:55 ` Yao, Jiewen
2016-11-03 21:43 ` Laszlo Ersek
2016-11-03 23:51 ` Yao, Jiewen
2016-11-04 0:09 ` Kinney, Michael D
2016-11-04 1:15 ` Yao, Jiewen
2016-11-04 16:15 ` Laszlo Ersek
2016-11-04 15:22 ` Laszlo Ersek
2016-11-04 15:29 ` Paolo Bonzini
2016-11-04 17:36 ` Laszlo Ersek
2016-11-04 9:35 ` Yao, Jiewen
2016-11-04 15:23 ` Laszlo Ersek
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