From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes 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 Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- Documentation/ABI/testing/debugfs-moxtet | 35 ++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/ABI/testing/debugfs-moxtet (limited to 'Documentation/ABI/testing/debugfs-moxtet') diff --git a/Documentation/ABI/testing/debugfs-moxtet b/Documentation/ABI/testing/debugfs-moxtet new file mode 100644 index 000000000..637d8587d --- /dev/null +++ b/Documentation/ABI/testing/debugfs-moxtet @@ -0,0 +1,35 @@ +What: /sys/kernel/debug/moxtet/input +Date: March 2019 +KernelVersion: 5.3 +Contact: Marek Behún +Description: (Read) Read input from the shift registers, in hexadecimal. + Returns N+1 bytes, where N is the number of Moxtet connected + modules. The first byte is from the CPU board itself. + + Example:: + + 101214 + + == ======================================= + 10 CPU board with SD card + 12 2 = PCIe module, 1 = IRQ not active + 14 4 = Peridot module, 1 = IRQ not active + == ======================================= + +What: /sys/kernel/debug/moxtet/output +Date: March 2019 +KernelVersion: 5.3 +Contact: Marek Behún +Description: (RW) Read last written value to the shift registers, in + hexadecimal, or write values to the shift registers, also + in hexadecimal. + + Example:: + + 0102 + + == ================================================ + 01 01 was last written, or is to be written, to the + first module's shift register + 02 the same for second module + == ================================================ -- cgit v1.3.1