From: Xingang Wang
When booting with devicetree, the pci_request_acs() is called after the
enumeration and initialization of PCI devices, thus the ACS is not
enabled. And ACS should be enabled when IOMMU is detected for the
PCI host bridge, so add check for IOMMU before probe of PCI host and call
From: Xingang Wang
When booting with devicetree, the pci_request_acs() is called after the
enumeration and initialization of PCI devices, thus the ACS is not
enabled. And ACS should be enabled when IOMMU is detected for the
PCI host bridge, so add check for IOMMU before probe of PCI host and call
From: Xingang Wang
When booting with devicetree, the pci_request_acs() is called after the
enumeration and initialization of PCI devices, thus the ACS is not
enabled. This patch add check for IOMMU in of_core_init(), and call
pci_request_acs() when iommu is detected, making sure that the ACS will
From: Xingang Wang
When request ACS for PCI device in of_iommu_configure, the pci device
has already been scanned and added with 'pci_acs_enable=0'. So the
pci_request_acs() in current procedure does not work for enabling ACS.
Besides, the ACS should be enabled only if there's an IOMMU in system.
From: Xingang Wang
When request ACS in of_iommu_configure, the pci_acs_init procedure has
already been called. The pci device probe procedure is like the following:
pci_host_common_probe
pci_device_add
pci_acs_init
of_iommu_configure
pci_request_acs
The pci_request_acs() does not
Thanks for your reply. We are testing vSVA, and will let you know if
other problems are found.
On 2020/12/1 21:58, Auger Eric wrote:
Hi Xingang,
On 12/1/20 2:33 PM, Xingang Wang wrote:
Hi Eric
On Wed, 18 Nov 2020 12:21:43, Eric Auger wrote:
@@ -1710,7 +1710,11 @@ static void arm_smmu_tlb_in
