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| author | Zeng Chi <zengchi@kylinos.cn> | 2026-09-21 18:24:42 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-09-22 08:36:16 -0700 |
| commit | 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d (patch) | |
| tree | 660d50d4139cb750fbde1ae3432452c20726c99d /Documentation/PCI/endpoint/function | |
| download | linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.tar.gz linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.zip | |
KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted
Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.
Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'Documentation/PCI/endpoint/function')
| -rw-r--r-- | Documentation/PCI/endpoint/function/binding/pci-ntb.rst | 38 | ||||
| -rw-r--r-- | Documentation/PCI/endpoint/function/binding/pci-test.rst | 26 |
2 files changed, 64 insertions, 0 deletions
diff --git a/Documentation/PCI/endpoint/function/binding/pci-ntb.rst b/Documentation/PCI/endpoint/function/binding/pci-ntb.rst new file mode 100644 index 000000000..40253d3d5 --- /dev/null +++ b/Documentation/PCI/endpoint/function/binding/pci-ntb.rst @@ -0,0 +1,38 @@ +.. SPDX-License-Identifier: GPL-2.0 + +========================== +PCI NTB Endpoint Function +========================== + +1) Create a subdirectory to pci_epf_ntb directory in configfs. + +Standard EPF Configurable Fields: + +================ =========================================================== +vendorid should be 0x104c +deviceid should be 0xb00d for TI's J721E SoC +revid don't care +progif_code don't care +subclass_code should be 0x00 +baseclass_code should be 0x5 +cache_line_size don't care +subsys_vendor_id don't care +subsys_id don't care +interrupt_pin don't care +msi_interrupts don't care +msix_interrupts don't care +================ =========================================================== + +2) Create a subdirectory to directory created in 1 + +NTB EPF specific configurable fields: + +================ =========================================================== +db_count Number of doorbells; default = 4 +mw1 size of memory window1 +mw2 size of memory window2 +mw3 size of memory window3 +mw4 size of memory window4 +num_mws Number of memory windows; max = 4 +spad_count Number of scratchpad registers; default = 64 +================ =========================================================== diff --git a/Documentation/PCI/endpoint/function/binding/pci-test.rst b/Documentation/PCI/endpoint/function/binding/pci-test.rst new file mode 100644 index 000000000..57ee866fb --- /dev/null +++ b/Documentation/PCI/endpoint/function/binding/pci-test.rst @@ -0,0 +1,26 @@ +.. SPDX-License-Identifier: GPL-2.0 + +========================== +PCI Test Endpoint Function +========================== + +name: Should be "pci_epf_test" to bind to the pci_epf_test driver. + +Configurable Fields: + +================ =========================================================== +vendorid should be 0x104c +deviceid should be 0xb500 for DRA74x and 0xb501 for DRA72x +revid don't care +progif_code don't care +subclass_code don't care +baseclass_code should be 0xff +cache_line_size don't care +subsys_vendor_id don't care +subsys_id don't care +interrupt_pin Should be 1 - INTA, 2 - INTB, 3 - INTC, 4 -INTD +msi_interrupts Should be 1 to 32 depending on the number of MSI interrupts + to test +msix_interrupts Should be 1 to 2048 depending on the number of MSI-X + interrupts to test +================ =========================================================== |