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Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types
From: |
David Woodhouse |
Subject: |
Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types |
Date: |
Thu, 21 Feb 2013 14:41:01 +0000 |
On Thu, 2013-02-21 at 08:37 -0600, Anthony Liguori wrote:
>
> Help me understand where we're at. If you fix the bugs in UEFI and
> SeaBIOS, and I correct the reset patches I pointed you at earlier, we're
> good?
Yes. And merge the bit which resets the PAM configuration in the i440FX
on a hard reset. And make sure that suspend/resume, keyboard controller,
etc., are *not* hard resets.
> Or is the lack of big real mode at startup on non-unrestricted
> mode boxes also a problem?
No.
> I never quite understood how the two related to each other in this thread.
It's one or the other. If big real mode actually worked, we'd run from
0xfffffff0 after reset (*any* reset), and we wouldn't *care* what we get
when we read from 0xffff0.
Since big real mode is broken, we *do* care what's at 0xffff0. And thus
we need to make sure that after a *hard* reset it's the ROM (OVMF), and
after a *soft* reset it's still RAM (SeaBIOS after it's done its init,
and can find the ACPI resume vector, etc.)
--
dwmw2
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- Re: [Qemu-devel] [RFC PATCH] Distinguish between reset types, (continued)
- Re: [Qemu-devel] [RFC PATCH] Distinguish between reset types, David Woodhouse, 2013/02/20
- Re: [Qemu-devel] [RFC PATCH] Distinguish between reset types, Anthony Liguori, 2013/02/20
- Re: [Qemu-devel] [RFC PATCH] Distinguish between reset types, Laszlo Ersek, 2013/02/20
- Re: [Qemu-devel] [RFC PATCH] Distinguish between reset types, David Woodhouse, 2013/02/20
- Re: [Qemu-devel] [RFC PATCH] Distinguish between reset types, Laszlo Ersek, 2013/02/20
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, Paolo Bonzini, 2013/02/21
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, David Woodhouse, 2013/02/21
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, Laszlo Ersek, 2013/02/21
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, David Woodhouse, 2013/02/21
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, Anthony Liguori, 2013/02/21
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types,
David Woodhouse <=
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, Laszlo Ersek, 2013/02/21
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, David Woodhouse, 2013/02/21
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, Paolo Bonzini, 2013/02/21
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, Anthony Liguori, 2013/02/21
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, Laszlo Ersek, 2013/02/21
- Re: [Qemu-devel] [edk2] [RFC PATCH] Distinguish between reset types, Anthony Liguori, 2013/02/21
- [Qemu-devel] OvmfPkg reset [was: Distinguish between reset types], Laszlo Ersek, 2013/02/21
- Re: [Qemu-devel] [edk2] OvmfPkg reset [was: Distinguish between reset types], Paolo Bonzini, 2013/02/21
- Re: [Qemu-devel] [edk2] OvmfPkg reset [was: Distinguish between reset types], Laszlo Ersek, 2013/02/21
- Re: [Qemu-devel] [RFC PATCH] Distinguish between reset types, David Woodhouse, 2013/02/20