From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mail.byosoft.com.cn (mail.byosoft.com.cn [58.240.74.242])
 by mx.groups.io with SMTP id smtpd.web10.6962.1618363691222436400
 for <devel@edk2.groups.io>;
 Tue, 13 Apr 2021 18:28:12 -0700
Authentication-Results: mx.groups.io;
 dkim=missing; spf=none, err=permanent DNS error (domain: byosoft.com.cn, ip: 58.240.74.242, mailfrom: gaoliming@byosoft.com.cn)
Received: from DESKTOPS6D0PVI ([58.246.60.130])
	(envelope-sender <gaoliming@byosoft.com.cn>)
	by 192.168.6.13 with ESMTP
	for <devel@edk2.groups.io>; Wed, 14 Apr 2021 09:28:00 +0800
X-WM-Sender: gaoliming@byosoft.com.cn
X-Originating-IP: 58.246.60.130
X-WM-AuthFlag: YES
X-WM-AuthUser: gaoliming@byosoft.com.cn
From: "gaoliming" <gaoliming@byosoft.com.cn>
To: <devel@edk2.groups.io>,
	<gaoliming@byosoft.com.cn>,
	<naitaku@gmail.com>
Cc: "'Michael D Kinney'" <michael.d.kinney@intel.com>,
	"'Zhiguang Liu'" <zhiguang.liu@intel.com>
References: <20210412150718.71002-1-naitaku@gmail.com> <20210412150718.71002-2-naitaku@gmail.com> <167545FDCFB469C8.2444@groups.io>
In-Reply-To: <167545FDCFB469C8.2444@groups.io>
Subject: =?UTF-8?B?5Zue5aSNOiBbZWRrMi1kZXZlbF0gW1BBVENIIHYxIDEvMV0gRml4IEFzbVJlYWRNc3I2NCgpIGFuZCBBc21Xcml0ZU1zcjY0KCkgd2l0aCBHQ0MgdG9vbGNoYWlu?=
Date: Wed, 14 Apr 2021 09:28:08 +0800
Message-ID: <015901d730cd$6cf56750$46e035f0$@byosoft.com.cn>
MIME-Version: 1.0
X-Mailer: Microsoft Outlook 16.0
Thread-Index: AQF5N7DSd2H4VmHoFigR+Va7g11WMAMt5lC7AmnQOuirQm21UA==
Content-Type: text/plain;
	charset="gb2312"
Content-Transfer-Encoding: quoted-printable
Content-Language: zh-cn

Create PR https://github.com/tianocore/edk2/pull/1562 for it.=20

Thanks
Liming
> -----=D3=CA=BC=FE=D4=AD=BC=FE-----
> =B7=A2=BC=FE=C8=CB: devel@edk2.groups.io <devel@edk2.groups.io> =B4=FA=
=B1=ED gaoliming
> =B7=A2=CB=CD=CA=B1=BC=E4: 2021=C4=EA4=D4=C213=C8=D5 9:16
> =CA=D5=BC=FE=C8=CB: devel@edk2.groups.io; naitaku@gmail.com
> =B3=AD=CB=CD: 'Michael D Kinney' <michael.d.kinney@intel.com>; 'Zhiguang=
 Liu'
> <zhiguang.liu@intel.com>
> =D6=F7=CC=E2: =BB=D8=B8=B4: [edk2-devel] [PATCH v1 1/1] Fix AsmReadMsr64=
() and
> AsmWriteMsr64() with GCC toolchain
>=20
> Naito:
>   The fix is correct. Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
>=20
> Thanks
> Liming
> > -----=D3=CA=BC=FE=D4=AD=BC=FE-----
> > =B7=A2=BC=FE=C8=CB: devel@edk2.groups.io <devel@edk2.groups.io> =B4=FA=
=
=B1=ED Takuto
> Naito
> > =B7=A2=CB=CD=CA=B1=BC=E4: 2021=C4=EA4=D4=C212=C8=D5 23:07
> > =CA=D5=BC=FE=C8=CB: devel@edk2.groups.io
> > =B3=AD=CB=CD: Takuto Naito <naitaku@gmail.com>; Michael D Kinney
> > <michael.d.kinney@intel.com>; Liming Gao <gaoliming@byosoft.com.cn>;
> > Zhiguang Liu <zhiguang.liu@intel.com>
> > =D6=F7=CC=E2: [edk2-devel] [PATCH v1 1/1] Fix AsmReadMsr64() and
> AsmWriteMsr64()
> > with GCC toolchain
> >
> > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3D3325
> >
> > 1. AsmReadMsr64() in X64/GccInlinePriv.c
> > AsmReadMsr64 can return uninitialized value if FilterBeforeMsrRead
> > returns False. This causes build error with the CLANG toolchain.
> >
> > 2. AsmWriteMsr64() in X64/GccInlinePriv.c
> > In the case that FilterBeforeMsrWrite changes Value and returns True,
> > The original Value, not the changed Value, is written to the MSR.
> > This behavior is different from the one of AsmWriteMsr64() in
> > X64/WriteMsr64.c for the MSFT toolchain.
> >
> > Signed-off-by: Takuto Naito <naitaku@gmail.com>
> > Cc: Michael D Kinney <michael.d.kinney@intel.com>
> > Cc: Liming Gao <gaoliming@byosoft.com.cn>
> > Cc: Zhiguang Liu <zhiguang.liu@intel.com>
> > ---
> >  MdePkg/Library/BaseLib/X64/GccInlinePriv.c | 7 +++----
> >  1 file changed, 3 insertions(+), 4 deletions(-)
> >
> > diff --git a/MdePkg/Library/BaseLib/X64/GccInlinePriv.c
> > b/MdePkg/Library/BaseLib/X64/GccInlinePriv.c
> > index e4920f2116..244bd62ee6 100644
> > --- a/MdePkg/Library/BaseLib/X64/GccInlinePriv.c
> > +++ b/MdePkg/Library/BaseLib/X64/GccInlinePriv.c
> > @@ -80,7 +80,7 @@ AsmReadMsr64 (
> >    }
> >    FilterAfterMsrRead (Index, &Value);
> >
> > -  return (((UINT64)HighData) << 32) | LowData;
> > +  return Value;
> >  }
> >
> >  /**
> > @@ -111,11 +111,10 @@ AsmWriteMsr64 (
> >    UINT32 HighData;
> >    BOOLEAN Flag;
> >
> > -  LowData  =3D (UINT32)(Value);
> > -  HighData =3D (UINT32)(Value >> 32);
> > -
> >    Flag =3D FilterBeforeMsrWrite (Index, &Value);
> >    if (Flag) {
> > +    LowData  =3D (UINT32)(Value);
> > +    HighData =3D (UINT32)(Value >> 32);
> >      __asm__ __volatile__ (
> >        "wrmsr"
> >        :
> > --
> > 2.31.1
> >
> >
> >
> >
> >
>=20
>=20
>=20
>=20
>=20
>=20
>=20