Hi AceLan Kao,
On Wed, May 13, 2015 at 03:37:57PM +0800, AceLan Kao wrote:
> The method I described is not making any guess, we need a table to
> write down the correct ioapic value for those machines, we can add the
> BIOS version check(DMI_BIOS_VERSION) if you think the behavior may
> change wit
On 05/13/15 at 05:13pm, Li, ZhenHua wrote:
> Hi Baoquan,
> I am using a list here to store all the mapped addresses, and unmap
> them out of iounmap.
>
> About the reason, please check the old mails. I cannot remember the
> detailed reasons.
Yeah, I understand that the list is used to collect al
Hi Baoquan,
I am using a list here to store all the mapped addresses, and unmap them
out of iounmap.
About the reason, please check the old mails. I cannot remember the
detailed reasons.
Thanks
Zhenhua
On 05/13/2015 05:00 PM, Baoquan He wrote:
On 05/11/15 at 05:52pm, Li, Zhen-Hua wrote:
A
On 05/13/15 at 04:58pm, Li, ZhenHua wrote:
> Hi Dave,
>
> iommu->root_entry_old_virt is used to store the mapped old rta.
> iommu->root_entry_old_phys is used to store the physical address
> stored in registers.
> So we must not free/unmap iommu->root_entry_old_phys .
Oh, yes. I was mistaken on t
On 05/11/15 at 05:52pm, Li, Zhen-Hua wrote:
> Add some functions to copy the data from old kernel.
> These functions are used to copy context tables and page tables.
>
> To avoid calling iounmap between spin_lock_irqsave and spin_unlock_irqrestore,
> use a link here, store the pointers , and then
Hi Dave,
iommu->root_entry_old_virt is used to store the mapped old rta.
iommu->root_entry_old_phys is used to store the physical address stored
in registers.
So we must not free/unmap iommu->root_entry_old_phys .
Zhenhua
On 05/13/2015 04:56 PM, Baoquan He wrote:
+
+ iommu->root_entry_o
On 05/11/15 at 05:52pm, Li, Zhen-Hua wrote:
> Populate it with support functions to copy iommu translation tables from
> from the panicked kernel into the kdump kernel in the event of a crash.
>
> Functions:
> Use old root entry table, and load the old data to root_entry as cache.
> Malloc
On 05/13/15 at 09:47am, Li, ZhenHua wrote:
> On 05/12/2015 04:37 PM, Dave Young wrote:
> >Seems the subject was truncated? Maybe "re" means root entry? Then please
> >fix it
> >
> >On 05/11/15 at 05:52pm, Li, Zhen-Hua wrote:
> >>Add functions to load root entry table from old kernel, and to save u
On 05/13/15 at 09:45am, Li, ZhenHua wrote:
> On 05/12/2015 04:17 PM, Dave Young wrote:
> >On 05/11/15 at 05:52pm, Li, Zhen-Hua wrote:
> >>Add context entry functions needed for kdump.
> >>+/*
> >>+ * Fix Crashdump failure caused by leftover DMA through a hardware IOMMU
> >>+ *
> >>+ * Fixes the cra
On 2015/5/13 0:55, Will Deacon wrote:
> Hi Leizhen,
>
> Thanks for the review!
>
> On Tue, May 12, 2015 at 08:40:06AM +0100, leizhen wrote:
>>
>>> +
>>> +static int queue_poll_cons(struct arm_smmu_queue *q, u32 until, bool wfe)
>>> +{
>>> + ktime_t timeout = ktime_add_us(ktime_get(), ARM_SMMU
Hi Joerg,
The method I described is not making any guess, we need a table to
write down the correct ioapic value for those machines, we can add the
BIOS version check(DMI_BIOS_VERSION) if you think the behavior may
change with different version of BIOSes.
If you still feel uncomfortable, I'm okay
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