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/accel/rocket/index.rst | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 Documentation/accel/rocket/index.rst (limited to 'Documentation/accel/rocket') diff --git a/Documentation/accel/rocket/index.rst b/Documentation/accel/rocket/index.rst new file mode 100644 index 000000000..70f97bccf --- /dev/null +++ b/Documentation/accel/rocket/index.rst @@ -0,0 +1,19 @@ +.. SPDX-License-Identifier: GPL-2.0-only + +===================================== + accel/rocket Rockchip NPU driver +===================================== + +The accel/rocket driver supports the Neural Processing Units (NPUs) inside some +Rockchip SoCs such as the RK3588. Rockchip calls it RKNN and sometimes RKNPU. + +The hardware is described in chapter 36 in the RK3588 TRM. + +This driver just powers the hardware on and off, allocates and maps buffers to +the device and submits jobs to the frontend unit. Everything else is done in +userspace, as a Gallium driver (also called rocket) that is part of the Mesa3D +project. + +Hardware currently supported: + +* RK3588 -- cgit v1.3.1