On 2021/3/2 21:14, David Marchand wrote:
This change is a fix/optimisation.
This is a separate topic from adding MMIO support with x86 ioport.
I would split as a separate patch.
Hi David:
Maybe there is confuse? There is no change. The out/in is added. I don't
remove _p on purpose.
Looking a
On Mon, Mar 1, 2021 at 4:44 PM 谢华伟(此时此刻） wrote:
> >>> What is the downside of using "pause until the I/O completes" versions?
> >> The downside in virtio PMD is a small performance penalty when we use it
> >> to notify backend. CPU executes unnecessary serializing IO instruction.
> >>
> >> I check
On 2021/2/25 17:52, David Marchand wrote:
On Thu, Feb 25, 2021 at 5:00 AM 谢华伟(此时此刻） wrote:
Is the 'outb_p' to 'outb' conversion intentional? And if so why?
Same of the all 'outb_p', 'outw_p', 'outl_p'.
There is no need to delay for virtio device, as we can see in virtio
legacy driver.
IMO,
On Thu, Feb 25, 2021 at 5:00 AM 谢华伟(此时此刻） wrote:
> >>> Is the 'outb_p' to 'outb' conversion intentional? And if so why?
> >>>
> >>> Same of the all 'outb_p', 'outw_p', 'outl_p'.
> >>
> >> There is no need to delay for virtio device, as we can see in virtio
> >> legacy driver.
> >>
> >> IMO, the de
On 2021/2/24 23:45, Ferruh Yigit wrote:
On 2/23/2021 2:20 PM, 谢华伟(此时此刻） wrote:
On 2021/2/23 1:25, Ferruh Yigit wrote:
On 2/22/2021 5:15 PM, 谢华伟(此时此刻） wrote:
From: "huawei.xhw"
With IO BAR, we get PIO(programmed IO) address.
With MMIO BAR, we get mapped virtual address.
We distinguish PIO(
On 2/23/2021 2:20 PM, 谢华伟(此时此刻） wrote:
On 2021/2/23 1:25, Ferruh Yigit wrote:
On 2/22/2021 5:15 PM, 谢华伟(此时此刻） wrote:
From: "huawei.xhw"
With IO BAR, we get PIO(programmed IO) address.
With MMIO BAR, we get mapped virtual address.
We distinguish PIO(Programmed IO) and MMIO(memory mapped IO) b
On 2021/2/23 1:25, Ferruh Yigit wrote:
On 2/22/2021 5:15 PM, 谢华伟(此时此刻） wrote:
From: "huawei.xhw"
With IO BAR, we get PIO(programmed IO) address.
With MMIO BAR, we get mapped virtual address.
We distinguish PIO(Programmed IO) and MMIO(memory mapped IO) by their
address like how kernel does.
On 2/22/2021 5:15 PM, 谢华伟(此时此刻） wrote:
From: "huawei.xhw"
With IO BAR, we get PIO(programmed IO) address.
With MMIO BAR, we get mapped virtual address.
We distinguish PIO(Programmed IO) and MMIO(memory mapped IO) by their address
like how kernel does.
ioread/write8/16/32 is provided to access
From: "huawei.xhw"
With IO BAR, we get PIO(programmed IO) address.
With MMIO BAR, we get mapped virtual address.
We distinguish PIO(Programmed IO) and MMIO(memory mapped IO) by their address
like how kernel does.
ioread/write8/16/32 is provided to access PIO/MMIO.
By the way, for virtio on arch
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