Biesheuvel; Sami
Mujawar
Subject: Re: [edk2-devel] [PATCH v4 19/37] UefiCpuPkg: Add MMIO method in
CpuIo2Dxe
Thanks,
Chao
On 2023/12/21 21:59, Ard Biesheuvel wrote:
On Thu, 21 Dec 2023 at 13:41, Chao Li wrote:
...
A given platform will either be able to use port IO, or it will need
indholm ; Ard
> Biesheuvel ; Sami Mujawar
> Subject: Re: [edk2-devel] [PATCH v4 19/37] UefiCpuPkg: Add MMIO method in
> CpuIo2Dxe
>
>
>
>
>
>
>
> Thanks,
> Chao
>
> On 2023/12/21 21:59, Ard Biesheuvel wrote:
>
> On Thu, 21 Dec 2023 at 13:41, Chao Li w
Good to me.
Thanks,
Ray
From: Chao Li
Sent: Friday, December 22, 2023 9:15 AM
To: devel@edk2.groups.io; a...@kernel.org; Ni, Ray
Cc: Kumar, Rahul R ; Gerd Hoffmann
; Leif Lindholm ; Ard Biesheuvel
; Sami Mujawar
Subject: Re: [edk2-devel] [PATCH v4 19/37] UefiCpuPkg: Add MMIO method
Thanks,
Chao
On 2023/12/21 21:59, Ard Biesheuvel wrote:
On Thu, 21 Dec 2023 at 13:41, Chao Li wrote:
...
A given platform will either be able to use port IO, or it will need
to use MMIO translation. So a driver that can do both based on a PCD
is not very useful, it makes more sense to have
On Thu, 21 Dec 2023 at 13:41, Chao Li wrote:
>
...
> A given platform will either be able to use port IO, or it will need
> to use MMIO translation. So a driver that can do both based on a PCD
> is not very useful, it makes more sense to have two different drivers,
> and the platform incorporates
Thanks,
Chao
On 2023/12/21 20:31, Ard Biesheuvel wrote:
On Thu, 21 Dec 2023 at 13:11, Chao Li wrote:
Hi Ard,
Thanks,
Chao
On 2023/12/21 15:31, Ard Biesheuvel wrote:
On Thu, 21 Dec 2023 at 04:48, Chao Li wrote:
...
Ard,
PcdPciIoTranslationIsEnabled is only use for whether to trigger
On Thu, 21 Dec 2023 at 13:11, Chao Li wrote:
>
> Hi Ard,
>
>
> Thanks,
> Chao
> On 2023/12/21 15:31, Ard Biesheuvel wrote:
>
> On Thu, 21 Dec 2023 at 04:48, Chao Li wrote:
>
> ...
>
> Ard,
>
> PcdPciIoTranslationIsEnabled is only use for whether to trigger the Ffio read
> or write, it seem that
Hi Ard,
Thanks,
Chao
On 2023/12/21 15:31, Ard Biesheuvel wrote:
On Thu, 21 Dec 2023 at 04:48, Chao Li wrote:
...
Ard,
PcdPciIoTranslationIsEnabled is only use for whether to trigger the Ffio read
or write, it seem that only x86 or x64 need them, not others.
When I was submitted the patch
On Thu, 21 Dec 2023 at 04:48, Chao Li wrote:
>
...
> Ard,
>
> PcdPciIoTranslationIsEnabled is only use for whether to trigger the Ffio read
> or write, it seem that only x86 or x64 need them, not others.
>
> When I was submitted the patch V2, CpuIo2Dxe was private to LoongArch, just
> like Arm
to accommodate the MMIO methods,
so I merged them togeter in this change.
From: Chao Li
Sent: Tuesday, December 19, 2023 9:04 PM
To:devel@edk2.groups.io; Ni, Ray
Cc: Kumar, Rahul R; Gerd Hoffmann; Leif
Lindholm; Ard Biesheuvel; Sami
Mujawar
Subject: Re: [edk2-devel] [PATCH v4 19/37] UefiCpuPkg
On Wed, 20 Dec 2023 at 13:28, Ni, Ray wrote:
>
> Thanks for pointing it out.
> I found it in ACPI spec that tells how to use "Resource Type Specific Flags"
> to describe a MEM resource while maps to IO,
> and an IO resource while maps to MEM.
>
> I assume that the IO port accesses are all from
gt; Sent: Wednesday, December 20, 2023 5:54 PM
> To: Ni, Ray
> Cc: devel@edk2.groups.io; lic...@loongson.cn; Kumar, Rahul R
> ; Gerd Hoffmann ; Leif
> Lindholm ; Ard Biesheuvel
> ; Sami Mujawar
> Subject: Re: [edk2-devel] [PATCH v4 19/37] UefiCpuPkg: Add MMIO method
> in CpuIo2D
On Wed, 20 Dec 2023 at 10:44, Ni, Ray wrote:
>
> Ard,
> Let me try to understand:
>
> 1. CPU does not support IO instructions to access IO ports.
> 2. PCI devices contain IO space.
> 3. A special PCI host bridge can be configured to map a range of MMIO space
> from CPU side to another range of
; From: Chao Li
> > Sent: Tuesday, December 19, 2023 9:04 PM
> > To: devel@edk2.groups.io; Ni, Ray
> > Cc: Kumar, Rahul R ; Gerd Hoffmann
> ; Leif Lindholm ; Ard
> Biesheuvel ; Sami Mujawar
>
> > Subject: Re: [edk2-devel] [PATCH v4 19/37] UefiCpuPkg: Add MMIO meth
his
seems unnecessary to me. But perhaps I missed something?
>
> From: Chao Li
> Sent: Tuesday, December 19, 2023 9:04 PM
> To: devel@edk2.groups.io; Ni, Ray
> Cc: Kumar, Rahul R ; Gerd Hoffmann
> ; Leif Lindholm ; Ard
> Biesheuvel ; Sami Mujawar
> Subject: Re: [edk2-
?
Thanks,
Ray
From: Chao Li
Sent: Tuesday, December 19, 2023 9:04 PM
To: devel@edk2.groups.io; Ni, Ray
Cc: Kumar, Rahul R ; Gerd Hoffmann
; Leif Lindholm ; Ard Biesheuvel
; Sami Mujawar
Subject: Re: [edk2-devel] [PATCH v4 19/37] UefiCpuPkg: Add MMIO method in
CpuIo2Dxe
Hi Ray,
Can you
Hi Ray,
Can you please review this patch? Thank you!
Thanks,
Chao
On 2023/12/12 21:12, Chao Li wrote:
CpuIo2Dxe only supports IO to access PCI IO. Some ARCH requires
MMIO to access PCI IO, add the MMIO access method in CpuIo2Dxe.
The MMIO methods depend on PcdPciIoTranslationIsEnabled and
CpuIo2Dxe only supports IO to access PCI IO. Some ARCH requires
MMIO to access PCI IO, add the MMIO access method in CpuIo2Dxe.
The MMIO methods depend on PcdPciIoTranslationIsEnabled and
PcdPciIoTransLation. The code is referenced from ArmPkg.
Build-tested only (with "OvmfPkgX64.dsc").
BZ:
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