riscv: iommu: ask for ACS to be enabled

[PATCH] riscv: iommu: ask for ACS to be enabled

Posted by BillXiang 1 week, 1 day ago

Make sure ACS will be enabled during PCI probe

Signed-off-by: BillXiang <xiangwencheng@lanxincomputing.com>
---
 drivers/acpi/riscv/rimt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/acpi/riscv/rimt.c b/drivers/acpi/riscv/rimt.c
index e4538fa6c2c8..30d2d0211d5e 100644
--- a/drivers/acpi/riscv/rimt.c
+++ b/drivers/acpi/riscv/rimt.c
@@ -525,4 +525,5 @@ void __init riscv_acpi_rimt_init(void)
 
 		return;
 	}
+	pci_request_acs();
 }
-- 
2.53.0

Re: [PATCH] riscv: iommu: ask for ACS to be enabled

Posted by Sunil V L 1 week, 1 day ago

On Wed, Sep 16, 2026 at 5:15 PM BillXiang
<xiangwencheng@lanxincomputing.com> wrote:
>
> Make sure ACS will be enabled during PCI probe
>
> Signed-off-by: BillXiang <xiangwencheng@lanxincomputing.com>
> ---
>  drivers/acpi/riscv/rimt.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/acpi/riscv/rimt.c b/drivers/acpi/riscv/rimt.c
> index e4538fa6c2c8..30d2d0211d5e 100644
> --- a/drivers/acpi/riscv/rimt.c
> +++ b/drivers/acpi/riscv/rimt.c
> @@ -525,4 +525,5 @@ void __init riscv_acpi_rimt_init(void)
>
>                 return;
>         }
> +       pci_request_acs();
>  }
>
There is already a patch in the mailing list for this.

https://lkml.org/lkml/2026/9/3/1930

Thanks,
Sunil

Re: [PATCH] riscv: iommu: ask for ACS to be enabled

Posted by BillXiang 1 week, 1 day ago

On 9/16/2026 8:18 PM, Sunil V L wrote:
> On Wed, Sep 16, 2026 at 5:15 PM BillXiang
> <xiangwencheng@lanxincomputing.com> wrote:
>>
>> Make sure ACS will be enabled during PCI probe
>>
>> Signed-off-by: BillXiang <xiangwencheng@lanxincomputing.com>
>> ---
>>   drivers/acpi/riscv/rimt.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/acpi/riscv/rimt.c b/drivers/acpi/riscv/rimt.c
>> index e4538fa6c2c8..30d2d0211d5e 100644
>> --- a/drivers/acpi/riscv/rimt.c
>> +++ b/drivers/acpi/riscv/rimt.c
>> @@ -525,4 +525,5 @@ void __init riscv_acpi_rimt_init(void)
>>
>>                  return;
>>          }
>> +       pci_request_acs();
>>   }
>>
> There is already a patch in the mailing list for this.
> 
> https://lkml.org/lkml/2026/9/3/1930
> 
> Thanks,
> Sunil

Thank you for pointing that out. Please just ignore my commit.

--
BillXiang