linux-kernel - [PATCH 3/5] drm/amdkfd: Add AMDKFD_IOC_SVM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251112072910.3716944-4-honglei1.huang@amd.com>
Date: Wed, 12 Nov 2025 15:29:08 +0800
From: Honglei Huang <honglei1.huang@....com>
To: <Felix.Kuehling@....com>, <alexander.deucher@....com>,
	<christian.koenig@....com>, <Ray.Huang@....com>
CC: <dmitry.osipenko@...labora.com>, <Xinhui.Pan@....com>,
	<airlied@...il.com>, <daniel@...ll.ch>, <amd-gfx@...ts.freedesktop.org>,
	<dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
	<linux-mm@...ck.org>, <akpm@...ux-foundation.org>, <honghuang@....com>,
	Honglei Huang <Honglei1.Huang@....com>
Subject: [PATCH 3/5] drm/amdkfd: Add AMDKFD_IOC_SVM_RANGES ioctl command

From: Honglei Huang <Honglei1.Huang@....com>

Define a new ioctl command AMDKFD_IOC_SVM_RANGES (0x27) to support
batch registration of multiple SVM ranges. Update AMDKFD_COMMAND_END
from 0x27 to 0x28 accordingly.

This ioctl provides a more efficient interface for userspace to
register multiple non-contiguous memory ranges with the same set
of SVM attributes in a single system call, reducing context switching
overhead compared to multiple AMDKFD_IOC_SVM calls.

Signed-off-by: Honglei Huang <Honglei1.Huang@....com>
---
 include/uapi/linux/kfd_ioctl.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h
index d782bda1d2ca..c5f9595ef30d 100644
--- a/include/uapi/linux/kfd_ioctl.h
+++ b/include/uapi/linux/kfd_ioctl.h
@@ -663,7 +663,6 @@ enum kfd_mmio_remap {
 #define KFD_IOCTL_SVM_FLAG_GPU_ALWAYS_MAPPED   0x00000040
 /* Fine grained coherency between all devices using device-scope atomics */
 #define KFD_IOCTL_SVM_FLAG_EXT_COHERENT        0x00000080
-
 /**
  * kfd_ioctl_svm_op - SVM ioctl operations
  *
@@ -1622,7 +1621,10 @@ struct kfd_ioctl_dbg_trap_args {
 #define AMDKFD_IOC_DBG_TRAP			\
 		AMDKFD_IOWR(0x26, struct kfd_ioctl_dbg_trap_args)
 
+#define AMDKFD_IOC_SVM_RANGES		\
+		AMDKFD_IOWR(0x27, struct kfd_ioctl_svm_ranges_args)
+
 #define AMDKFD_COMMAND_START		0x01
-#define AMDKFD_COMMAND_END		0x27
+#define AMDKFD_COMMAND_END		0x28
 
 #endif
-- 
2.34.1