On Wed, May 07, 2025 at 02:23:02PM +0200, Michal Suchánek wrote:
> Hello,
>
> On Wed, May 07, 2025 at 02:36:57PM +0530, Amit Machhiwal wrote:
> > Hi Michal,
> >
> > I can recreate this issue on sles16 distro kernel but I don't observe this
> > issue
> > with upstream Linux 6.15-rc5 on the **same
Hello,
On Wed, May 07, 2025 at 02:36:57PM +0530, Amit Machhiwal wrote:
> Hi Michal,
>
> I can recreate this issue on sles16 distro kernel but I don't observe this
> issue
> with upstream Linux 6.15-rc5 on the **same** sles16 guest.
>
> Note: the commit 6aa989ab2bd0 ("powerpc/pseries/iommu: memo
Hi Michal,
I can recreate this issue on sles16 distro kernel but I don't observe this issue
with upstream Linux 6.15-rc5 on the **same** sles16 guest.
Note: the commit 6aa989ab2bd0 ("powerpc/pseries/iommu: memory notifier
incorrectly adds TCEs for pmemory") was included since Linux 6.15-rc1.
I t
Hello Michal,
In the patch to fix the pmemory bug, I made some changes to the code
that determines Max memory an LPAR can have (excluding pmemory). This
information is needed while creating Dynamic DMA Window (DDW). These
changes are in the main line code path of DDW creation. This might have
Hello,
On Wed, Mar 26, 2025 at 09:46:11AM -0500, Gaurav Batra wrote:
> Hello Michal,
>
> In the patch to fix the pmemory bug, I made some changes to the code that
> determines Max memory an LPAR can have (excluding pmemory). This information
> is needed while creating Dynamic DMA Window (DDW). Th
Hello,
looks like this upsets some assumption qemu has about these windows.
https://lists.nongnu.org/archive/html/qemu-devel/2025-03/msg05137.html
When Linux kernel that has this patch applied is running inside a qemu
VM with a PCI device and the VM is rebooted qemu crashes shortly after
the nex
On Thu, 30 Jan 2025 12:38:54 -0600, Gaurav Batra wrote:
> iommu_mem_notifier() is invoked when RAM is dynamically added/removed. This
> notifier call is responsible to add/remove TCEs from the Dynamic DMA Window
> (DDW) when TCEs are pre-mapped. TCEs are pre-mapped only for RAM and not
> for persis
On 2/5/25 19:28, Gaurav Batra wrote:
On 2/5/25 6:43 AM, Donet Tom wrote:
On 1/31/25 00:08, Gaurav Batra wrote:
iommu_mem_notifier() is invoked when RAM is dynamically
added/removed. This
notifier call is responsible to add/remove TCEs from the Dynamic DMA
Window
(DDW) when TCEs are pre-map
On 1/31/25 00:08, Gaurav Batra wrote:
iommu_mem_notifier() is invoked when RAM is dynamically added/removed. This
notifier call is responsible to add/remove TCEs from the Dynamic DMA Window
(DDW) when TCEs are pre-mapped. TCEs are pre-mapped only for RAM and not
for persistent memory (pmemory).
On 2/5/25 6:43 AM, Donet Tom wrote:
On 1/31/25 00:08, Gaurav Batra wrote:
iommu_mem_notifier() is invoked when RAM is dynamically
added/removed. This
notifier call is responsible to add/remove TCEs from the Dynamic DMA
Window
(DDW) when TCEs are pre-mapped. TCEs are pre-mapped only for RAM
iommu_mem_notifier() is invoked when RAM is dynamically added/removed. This
notifier call is responsible to add/remove TCEs from the Dynamic DMA Window
(DDW) when TCEs are pre-mapped. TCEs are pre-mapped only for RAM and not
for persistent memory (pmemory). For DMA buffers in pmemory, TCEs are
dyna
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