From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: mx.groups.io; dkim=pass header.i=@infradead.org header.s=bombadil.20170209 header.b=pSMd/W2Q; spf=none, err=permanent DNS error (domain: bombadil.srs.infradead.org, ip: 198.137.202.133, mailfrom: batv+fb89f1f5051329a57f31+5771+infradead.org+dwmw2@bombadil.srs.infradead.org) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by groups.io with SMTP; Wed, 12 Jun 2019 08:16:01 -0700 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Mime-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=/MKX+9RuZthFawU/Y2q6Hz1sblj4tOFL4NjCbUYNyTg=; b=pSMd/W2QwBhBuW6xRaEjkmAeE TJda7ue6AKlNCscN595Ce65YGUZ/ct+9J4johTnRzVNVewLPLGO+6Ha/Dm0R6MVPsAjjP/JZPl8S5 n5+Mwv9XW+CgTcgLNEhJ0mlOcDoDnDJkUTgPGK9E6s/sPWlPiWIu50FERuXlGh7zvil1y5pffTluw PxjrNCjvnnsWvpLZcurHrECSf4kMrNtl/eI86jS17QpgNDjklB63/CPEQoH23h1VyQyvqcZSxXxzY /9oN6CepxTY3xnwhFhNTV/9MOW67/HUuGUNOSV+WB9YA9IkQo9sVZ0e09KkZ4szqW7FVCGbEv/v7V fhRwCs0CA==; Received: from [54.239.6.185] (helo=u3832b3a9db3152.ant.amazon.com) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hb4yk-0001Uj-AA; Wed, 12 Jun 2019 15:15:58 +0000 Message-ID: <4e29cf1987459443f2bc3c99ba51bd770f5343b1.camel@infradead.org> Subject: Re: [PATCH v2 0/6] Ovmf: Drop IntelFramework[Module]Pkg dependency From: "David Woodhouse" To: Laszlo Ersek , "Wu, Hao A" , "Ni, Ray" , "Justen, Jordan L" , "devel@edk2.groups.io" Cc: Ard Biesheuvel , "Phillips, D Scott" Date: Wed, 12 Jun 2019 16:15:55 +0100 In-Reply-To: <4bc1c867-31e8-53cc-429c-c68b2085f34a@redhat.com> References: <20190611014313.12160-1-hao.a.wu@intel.com> <156023851748.468.9950138266923344967@jljusten-skl> <453b7e3c48014bd651717ccf9d9380356530bc82.camel@infradead.org> <734D49CCEBEEF84792F5B80ED585239D5C1B3908@SHSMSX104.ccr.corp.intel.com> <862b419a-0715-7430-1f68-bbf54143f7b7@redhat.com> <038f0a993eba5d25eb5e499fa4be95fa6717ad3e.camel@infradead.org> <4bc1c867-31e8-53cc-429c-c68b2085f34a@redhat.com> X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.1 Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Groupsio-MsgNum: 42291 Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-OOLrKGnx7g6a5aWAp/dM" --=-OOLrKGnx7g6a5aWAp/dM Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2019-06-12 at 13:52 +0200, Laszlo Ersek wrote: > (2c) SeaBIOS is built *twice*, once for the CSM, and another time for > the Cirrus VGABIOS. We shouldn't need to rebuild the VGA BIOS, should we? Any Legacy VGA BIOS should work =E2=80=94 and indeed UEFI should be able to use the Legacy= VGA BIOS even if it doesn't have native support for the video hardware. ISTR Windows 2008 even called legacy INT10 as part of the boot process and was part of my testing at the time? > (3b) The following out-of-tree patch is applied on top of (3a): >=20 > > diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBootSuppor= t.c b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBootSupport.c > > index 211750c0123b..119b5c9b6fe8 100644 > > --- a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBootSupport.c > > +++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBootSupport.c > > @@ -1231,8 +1231,8 @@ GenericLegacyBoot ( > > // > > Private->LegacyRegion->Lock ( > > Private->LegacyRegion, > > - 0xc0000, > > - 0x40000, > > + 0xe0000, > > + 0x10000, > > &Granularity > > ); > >=20 I didn't need this part. > With these, grub is booted successfully from the RHEL5 installer ISO > (which does not support UEFI at all). Unfortunately, after grub loads > vmlinuz + initrd, it fails with "Not enough memory to load specified > image", and returns to the grub prompt. (If I double the argument to > QEMU's "-m" option, to 2048, that makes no difference.) >=20 > This is at least a graceful failure. It's because the E820 table isn't being passed through to the CSM. Start of legacy boot E820[ 0]: 0x0000000000000000 - 0x000000000009F000, Type =3D 1 E820[ 1]: 0x000000000009F000 - 0x00000000000A0000, Type =3D 2 E820[ 2]: 0x00000000000E0000 - 0x0000000000100000, Type =3D 2 E820[ 3]: 0x0000000000100000 - 0x0000000000800000, Type =3D 1 E820[ 4]: 0x0000000000800000 - 0x0000000000808000, Type =3D 4 E820[ 5]: 0x0000000000808000 - 0x0000000000810000, Type =3D 1 E820[ 6]: 0x0000000000810000 - 0x0000000000900000, Type =3D 4 E820[ 7]: 0x0000000000900000 - 0x000000007E874000, Type =3D 1 E820[ 8]: 0x000000007E874000 - 0x000000007E88C000, Type =3D 4 E820[ 9]: 0x000000007E88C000 - 0x000000007E8B0000, Type =3D 2 E820[10]: 0x000000007E8B0000 - 0x000000007FBEF000, Type =3D 1 E820[11]: 0x000000007FBEF000 - 0x000000007FBF3000, Type =3D 2 E820[12]: 0x000000007FBF3000 - 0x000000007FBFB000, Type =3D 3 E820[13]: 0x000000007FBFB000 - 0x000000007FBFF000, Type =3D 4 E820[14]: 0x000000007FBFF000 - 0x000000007FF78000, Type =3D 1 E820[15]: 0x000000007FF78000 - 0x0000000080000000, Type =3D 4 E820[16]: 0x0000000080000000 - 0x00000000FC000000, Type =3D 2 E820[17]: 0x00000000FEC00000 - 0x00000000FEC01000, Type =3D 2 E820[18]: 0x00000000FED00000 - 0x00000000FED00400, Type =3D 2 E820[19]: 0x00000000FEE00000 - 0x00000000FEF00000, Type =3D 2 handle_hwpic1 irq=3D1 handle_csm regs 0x0005ffd4 AX=3D0006 Legacy16GetTableAddress size 190 align 0 region 3 ebda moved from 9f000 to fffffc00 Legacy16GetTableAddress size 190 align 0 region 3 yields 0x00000000 handle_csm returning AX=3D0001 enter handle_15: a=3D00002401 b=3D00000000 c=3D00000190 d=3D00000003 ds=3D0000 es=3D00= 00 ss=3D5000 si=3D00000000 di=3D00000000 bp=3D00000000 sp=3D0000ffc6 cs=3D5f00 ip=3D00= 30 f=3D3002 Legacy16 E820 length insufficient ... handle_csm regs 0x0005ffd4 AX=3D0002 PrepareToBoot table 580a:0008 Add to e820 map: f000ff53f000ff53 f000ff53f000e2c3 -268370093 Add to e820 map: f000ff53f000ff54 f000ce45f000ff53 -268382651 Add to e820 map: f000ce45f000ce45 f000ce45f000ce45 -268382651 Add to e820 map: c0005212f000ce45 f000f841f000f84d -268377090 Add to e820 map: f000f859f000e739 f000efd2f000e82e -268382614 Add to e820 map: f000fe6ef000e6f2 f000ff53f000ff53 -268370093 Add to e820 map: c0009200f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268374951 Add to e820 map: f000ff53f000ff53 f000ff53c0007000 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53f000ff53 f000ff53f000ff53 -268370093 Add to e820 map: f000ff53 00000000 0 Add to e820 map: 007c0000 00040000 2 CSM PIRQ table at 0x000f6340 CSM ACPI RSDP at 0x000f6440 Completely bogus E820 information tends to lead to confusing out-of- memory errors. Film at 11 :) This fixes it: diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBootSupport.c = b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBootSupport.c index 211750c012..3a84fa0258 100644 --- a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBootSupport.c +++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBootSupport.c @@ -929,6 +929,7 @@ GenericLegacyBoot ( ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET)); Regs.X.AX =3D Legacy16GetTableAddress; Regs.X.CX =3D (UINT16) CopySize; + Regs.X.DX =3D (UINT16) 1; Private->LegacyBios.FarCall86 ( &Private->LegacyBios, Private->Legacy16Table->Compatibility16CallSegment, I'm going to dig out the specification and see what an align field of 0 is actually intended to mean, and whether I should really be fixing it in SeaBIOS instead. This would also fix it: diff --git a/src/fw/csm.c b/src/fw/csm.c index 03b4bb8..5288096 100644 --- a/src/fw/csm.c +++ b/src/fw/csm.c @@ -265,9 +265,9 @@ handle_csm_0006(struct bregs *regs) size, align, region); =20 if (region & 2) - chunk =3D _malloc(&ZoneLow, size, align); + chunk =3D _malloc(&ZoneLow, size, align ? align : 1); if (!chunk && (region & 1)) - chunk =3D _malloc(&ZoneFSeg, size, align); + chunk =3D _malloc(&ZoneFSeg, size, align ? align : 1); =20 dprintf(3, "Legacy16GetTableAddress size %x align %x region %d yields = %p\n", size, align, region, chunk); I have various things booting fine with CSM again now. Thanks for helping me work through this. Aside from the actual allocation issue, perhaps the UEFI side should bail out properly when it can't pass E820 information to the CSM. 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