Re: [Xen-devel] OVMF blows up at unless I use pci_platform=0

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

On Mon, Feb 27, 2017 at 12:42:47PM -0500, Konrad Rzeszutek Wilk wrote:
> On Mon, Feb 20, 2017 at 03:49:31PM +0000, Anthony PERARD wrote:
> > On Wed, Feb 15, 2017 at 08:37:44PM -0500, Konrad Rzeszutek Wilk wrote:
> > > Hey,
> > > 
> > > I just built today Xen based on  93e1435290867703c50acad1f54b9208df473562
> > > Author: Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>
> > > Date:   Wed Feb 15 12:20:01 2017 +0000
> > > 
> > >     IOMMU: always call teardown callback
> > > 
> > [...]
> > > #xl create -c root-image-uefi.xm
> > > I get:
> > > 
> > > !!!! X64 Exception Type - 0E(#PF - Page-Fault)  CPU Apic ID - 00000000 
> > > !!!!
> > > RIP  - 000000003F2658DB, CS  - 0000000000000038, RFLAGS - 0000000000010206
> > > ExceptionData - 0000000000000002
> > > RAX  - 0000000000000001, RCX - 000000003F2658BB, RDX - 0000000000000004
> > > RBX  - 0000000000000000, RSP - 000000003F43B510, RBP - 000000003E574D18
> > > RSI  - 0000000000000003, RDI - 0000000000000001
> > > R8   - 0000000000000000, R9  - 0000000000000000, R10 - 000000003EA39198
> > > R11  - 0000000000000002, R12 - 000000003E575218, R13 - 0000000000000000
> > > R14  - 000000003E575220, R15 - 000000003F269301
> > > DS   - 0000000000000030, ES  - 0000000000000030, FS  - 0000000000000030
> > > GS   - 0000000000000030, SS  - 0000000000000030
> > > CR0  - 00000000C0000033, CR2 - FFFFFFFFBF2658BB, CR3 - 000000003F3DA000
> > > CR4  - 0000000000000668, CR8 - 0000000000000000
> > > DR0  - 0000000000000000, DR1 - 0000000000000000, DR2 - 0000000000000000
> > > DR3  - 0000000000000000, DR6 - 00000000FFFF0FF0, DR7 - 0000000000000400
> > > GDTR - 000000003F3C8A98 0000000000000047, LDTR - 0000000000000000
> > > IDTR - 000000003EAFD018 0000000000000FFF,   TR - 0000000000000000
> > > FXSAVE_STATE - 000000003F43B170
> > > !!!! Find PE image 
> > > /home/konrad/xen/tools/firmware/ovmf-dir-remote/Build/OvmfX64/DEBUG_GCC5/X64/OvmfPkg/XenBusDxe/XenBusDxe/DEBUG/XenBusDxe.dll
> > >  (ImageBase=000000003F262000, EntryPoint=000000003F263FE8) !!!!
> > 
> > Which version of gcc did you compile OVMF with?
> 
> 
> gcc (GCC) 6.3.1 20161221 (Red Hat 6.3.1-1)
> Copyright (C) 2016 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> 
> > 
> > I can reproduce with a "Page-Fault" in the same modules, but with an OVMF
> > binary compiled later, I have a "General Protection" fault in the module
> > PcRtc...
> > 
> > I blame -flto of gcc.
> 
> Oh..
> > 
> > If you have gcc 6.3, to build ovmf without -flto, either:
> > - build using OvmfPkg/build.sh -a X64 -n 4 -t GCC49
> >     (that is "-t GCC49" added to ./build.sh call)
> > - or edit OvmfPkg/build.sh, replace GCC5 by GCC49.
> 
> OK, let me try that.

BTW, this should be fix upstream now.
I'll update xen repo once we have a pass of upstream with osstest.

-- 
Anthony PERARD

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