Hi Joerg,
On 3/18/21 5:12 PM, Joerg Roedel wrote:
Hi,
On Mon, Mar 08, 2021 at 11:47:46AM -0800, Raj, Ashok wrote:
That is the primary motivation, given that we have moved to 1st level for
general IOVA, first level doesn't have a WO mapping. I didn't know enough
about the history to determine
Hi,
On Mon, Mar 08, 2021 at 11:47:46AM -0800, Raj, Ashok wrote:
> That is the primary motivation, given that we have moved to 1st level for
> general IOVA, first level doesn't have a WO mapping. I didn't know enough
> about the history to determine if a WO without a READ is very useful. I
> guess
Hi Joerg
On Mon, Mar 08, 2021 at 09:58:26AM +0800, Lu Baolu wrote:
> Hi Joerg,
>
> On 3/4/21 8:26 PM, Joerg Roedel wrote:
> >On Thu, Feb 25, 2021 at 02:26:51PM +0800, Lu Baolu wrote:
> >>When the first level page table is used for IOVA translation, it only
> >>supports Read-Only and Read-Write
Hi Joerg,
On 3/4/21 8:26 PM, Joerg Roedel wrote:
On Thu, Feb 25, 2021 at 02:26:51PM +0800, Lu Baolu wrote:
When the first level page table is used for IOVA translation, it only
supports Read-Only and Read-Write permissions. The Write-Only permission
is not supported as the PRESENT bit
On Thu, Feb 25, 2021 at 02:26:51PM +0800, Lu Baolu wrote:
> When the first level page table is used for IOVA translation, it only
> supports Read-Only and Read-Write permissions. The Write-Only permission
> is not supported as the PRESENT bit (implying Read permission) should
> always set. When
When the first level page table is used for IOVA translation, it only
supports Read-Only and Read-Write permissions. The Write-Only permission
is not supported as the PRESENT bit (implying Read permission) should
always set. When using second level, we still give separate permissions
that allows
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