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[PATCH OLK-5.10 0/5] zcopy: A zero-copy data transfer mechanism for HPC
by Liu Mingrui 14 Nov '25

14 Nov '25

This patchset provides a PAGEATTACH mechanism, a zero-copy data transfer solution optimized for High Performance Computing (HPC) workloads. It allows direct sharing of physical memory pages between distinct processes by mapping source pages to a target address space, eliminating redundant data copying and improving large data transfer efficiency. Key features: - Supports zero-copy communication between intra-node processes. - Handles both PTE-level small pages and PMD-level huge pages. Liu Mingrui (5): zcopy: Initialize zcopy module zcopy: Introduce the pageattach interface zcopy: Extend PMD trans hugepage mapping ability zcopy: Add tracepoint for PageAttach zcopy: Add debug inerface dump_pagetable MAINTAINERS | 6 + drivers/Kconfig | 2 + drivers/Makefile | 3 + drivers/zcopy/Kconfig | 32 ++ drivers/zcopy/Makefile | 2 + drivers/zcopy/zcopy.c | 722 ++++++++++++++++++++++++++++++++++ include/trace/events/attach.h | 157 ++++++++ 7 files changed, 924 insertions(+) create mode 100644 drivers/zcopy/Kconfig create mode 100644 drivers/zcopy/Makefile create mode 100644 drivers/zcopy/zcopy.c create mode 100644 include/trace/events/attach.h -- 2.25.1

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[PATCH OLK-6.6 0/5] zcopy: A zero-copy data transfer mechanism for HPC
by Liu Mingrui 14 Nov '25

14 Nov '25

This patchset provides a PAGEATTACH mechanism, a zero-copy data transfer solution optimized for High Performance Computing (HPC) workloads. It allows direct sharing of physical memory pages between distinct processes by mapping source pages to a target address space, eliminating redundant data copying and improving large data transfer efficiency. Key features: - Supports zero-copy communication between intra-node processes. - Handles both PTE-level small pages and PMD-level huge pages. Liu Mingrui (5): zcopy: Initialize zcopy module zcopy: Introduce the pageattach interface zcopy: Extend PMD trans hugepage mapping ability zcopy: Add tracepoint for PageAttach zcopy: Add debug inerface dump_pagetable MAINTAINERS | 6 + drivers/Kconfig | 2 + drivers/Makefile | 3 + drivers/zcopy/Kconfig | 32 ++ drivers/zcopy/Makefile | 2 + drivers/zcopy/zcopy.c | 943 ++++++++++++++++++++++++++++++++++ include/trace/events/attach.h | 157 ++++++ 7 files changed, 1145 insertions(+) create mode 100644 drivers/zcopy/Kconfig create mode 100644 drivers/zcopy/Makefile create mode 100644 drivers/zcopy/zcopy.c create mode 100644 include/trace/events/attach.h -- 2.25.1

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[PATCH OLK-6.6] misc: uacce - fix a null pointer access issue when poweroff
by Chenghai Huang 14 Nov '25

14 Nov '25

driver inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/ID6IAP CVE: NA ---------------------------------------------------------------------- When "poweroff -f" is call in virt, if there are accelerator services that have not yet completed, a situation may arise where uacce_fops_release and uacce_remove are executed concurrently. This can lead to the uacce_put_queue operation in uacce_fops_release accessing an empty ops pointer. Fixes: 642aa7325494 ("uacce: add stop_queue to replace put_queue in ioctl") Signed-off-by: Chenghai Huang <huangchenghai2(a)huawei.com> Signed-off-by: JiangShui Yang <yangjiangshui(a)h-partners.com> --- drivers/misc/uacce/uacce.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/misc/uacce/uacce.c b/drivers/misc/uacce/uacce.c index 04f2658712da..4dcf3bff4c8f 100644 --- a/drivers/misc/uacce/uacce.c +++ b/drivers/misc/uacce/uacce.c @@ -47,10 +47,13 @@ static int uacce_stop_queue(struct uacce_queue *q) { struct uacce_device *uacce = q->uacce; - if ((q->state == UACCE_Q_STARTED) && uacce->ops->stop_queue) + if (q->state != UACCE_Q_STARTED) + return 0; + + if (uacce->ops->stop_queue) uacce->ops->stop_queue(q); - q->state = UACCE_Q_ZOMBIE; + q->state = UACCE_Q_INIT; return 0; } @@ -61,8 +64,13 @@ static void uacce_put_queue(struct uacce_queue *q) uacce_stop_queue(q); + if (q->state != UACCE_Q_INIT) + return; + if (uacce->ops->put_queue) uacce->ops->put_queue(q); + + q->state = UACCE_Q_ZOMBIE; } static long uacce_get_ss_dma(struct uacce_queue *q, void __user *arg) -- 2.43.0

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[PATCH OLK-5.10 0/5] zcopy: A zero-copy data transfer mechanism for HPC
by Liu Mingrui 14 Nov '25

14 Nov '25

This patchset provides a PAGEATTACH mechanism, a zero-copy data transfer solution optimized for High Performance Computing (HPC) workloads. It allows direct sharing of physical memory pages between distinct processes by mapping source pages to a target address space, eliminating redundant data copying and improving large data transfer efficiency. Key features: - Supports zero-copy communication between intra-node processes. - Handles both PTE-level small pages and PMD-level huge pages (2MB). Liu Mingrui (5): zcopy: Initialize zcopy module zcopy: Introduce the pageattach interface zcopy: Extend PMD trans hugepage mapping ability zcopy: Add tracepoint for PageAttach zcopy: Add debug inerface dump_pagetable MAINTAINERS | 6 + drivers/Kconfig | 2 + drivers/Makefile | 3 + drivers/zcopy/Kconfig | 32 ++ drivers/zcopy/Makefile | 2 + drivers/zcopy/zcopy.c | 693 ++++++++++++++++++++++++++++++++++ include/trace/events/attach.h | 157 ++++++++ 7 files changed, 895 insertions(+) create mode 100644 drivers/zcopy/Kconfig create mode 100644 drivers/zcopy/Makefile create mode 100644 drivers/zcopy/zcopy.c create mode 100644 include/trace/events/attach.h -- 2.25.1

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[PATCH OLK-5.10 0/5] zcopy: A zero-copy data transfer mechanism for HPC
by Liu Mingrui 14 Nov '25

14 Nov '25

This patchset provides a PAGEATTACH mechanism, a zero-copy data transfer solution optimized for High Performance Computing (HPC) workloads. It allows direct sharing of physical memory pages between distinct processes by mapping source pages to a target address space, eliminating redundant data copying and improving large data transfer efficiency. Key features: - Supports zero-copy communication between intra-node processes. - Handles both PTE-level small pages and PMD-level huge pages (2MB). Liu Mingrui (5): zcopy: Initialize zcopy module zcopy: Introduce the pageattach interface zcopy: Extend PMD trans hugepage mapping ability zcopy: Add tracepoint for PageAttach zcopy: Add debug inerface dump_pagetable MAINTAINERS | 6 + drivers/Kconfig | 2 + drivers/Makefile | 3 + drivers/zcopy/Kconfig | 32 ++ drivers/zcopy/Makefile | 2 + drivers/zcopy/zcopy.c | 693 ++++++++++++++++++++++++++++++++++ include/trace/events/attach.h | 157 ++++++++ 7 files changed, 895 insertions(+) create mode 100644 drivers/zcopy/Kconfig create mode 100644 drivers/zcopy/Makefile create mode 100644 drivers/zcopy/zcopy.c create mode 100644 include/trace/events/attach.h -- 2.25.1

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[PATCH OLK-6.6 0/5] zcopy: A zero-copy data transfer mechanism for HPC
by Liu Mingrui 14 Nov '25

14 Nov '25

This patchset provides a PAGEATTACH mechanism, a zero-copy data transfer solution optimized for High Performance Computing (HPC) workloads. It allows direct sharing of physical memory pages between distinct processes by mapping source pages to a target address space, eliminating redundant data copying and improving large data transfer efficiency. Key features: - Supports zero-copy communication between intra-node processes. - Handles both PTE-level small pages and PMD-level huge pages (2MB). Liu Mingrui (5): zcopy: Initialize zcopy module zcopy: Introduce the pageattach interface zcopy: Extend PMD trans hugepage mapping ability zcopy: Add tracepoint for PageAttach zcopy: Add debug inerface dump_pagetable MAINTAINERS | 6 + drivers/Kconfig | 2 + drivers/Makefile | 3 + drivers/zcopy/Kconfig | 32 ++ drivers/zcopy/Makefile | 2 + drivers/zcopy/zcopy.c | 916 ++++++++++++++++++++++++++++++++++ include/trace/events/attach.h | 157 ++++++ 7 files changed, 1118 insertions(+) create mode 100644 drivers/zcopy/Kconfig create mode 100644 drivers/zcopy/Makefile create mode 100644 drivers/zcopy/zcopy.c create mode 100644 include/trace/events/attach.h -- 2.25.1

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[PATCH OLK-6.6 v8 0/9] Add xcall 2.0 support
by Jinjie Ruan 14 Nov '25

14 Nov '25

Add xcall 2.0 support, which is compatible with xcall1.0, and can be used to dynamic instruction replacement for hardware xcall. Changes in v8: - Fix no reigister and unregister null-ptr-ref bug by find prog first. - Fix xcall_comm_write write empty null-ptr-ref bug in memdup_user_nul(). - Add empty owner, exceed 64 prog name and repeat syscall check in check_prog(). - Move INIT_LIST_HEAD(&prog->list) to xcall_prog_register() instead of kernel module. Changes in v7: - Fix alternative bug in sync ventry. - Add "xcall" limit for xcall2.0 and hardware xcall. Changes in v6: - Add "xcall=debug" debug mode to use the "fast syscall" for every system call. - Use alternative to reduce the baseline performance noise floor when not set "xcall" on the kernel cmdline - Move binary_path out from xcall struct, and add to xcall_comm struct. - Fix1. insert_xcall_locked() check both "name" and "binary" to avoid repeated attach same name of xcall. - Fix2. Check if it is an executable file for the binary path. - Fix3. Check if it is an absolute path for the binary path. - Fix4. Remove the extra free_xcall_comm(info) in default branch in proc_xcall_command(). - Fix5. Add zero syscall hijack check for xcall_prog_register(). - Use __arm64_sys_ni_syscall() instead of define inv_xcall(). - Replace the -ENOSYS return value with -EINVAL, to avoid the warning. Changes in v5: - Fix build problem. - el0t_64_sync_ventry jump to kernel_ventry to do VMAP_STACK. - Some cleanups. - Merge the three refactor patch. Changes in v4: - Reuse uprobe_write_opcode() instead of use __replace_page() and copy_to_page(). - Handle error for uprobe_write_opcode(). - Support xcall1.0 before 920G. - Change xcall1.0 bitmap to byte array to save check insns. - Use percpu variable to save check insns for xcall1.0. - A little cleanup. Changes in v3: - Add validity checks during xcall registration to prevent out-of-bounds access and null pointer dereferences. - Extract __replace_page() and copy_to_page() from uprobe, to avoid code duplication. - Replace with new compatible refactored code. - Remove unnecessary member, such as old_name. Jinjie Ruan (2): xcall2.0: Support xcall1.0 for hardware xcall openeuler_defconfig: Enable CONFIG_DYNAMIC_XCALL by default Liao Chang (6): xcall2.0: Add userspace proc interface xcall2.0: Add xcall module register interface xcall2.0: Add xcall_area xcall2.0: Hajack syscall with dynamic instruciton replace xcall: Rework the early exception vector of XCALL and SYNC xcall2.0: Add a basic testcase Yipeng Zou (1): xcall: Add debug mode to force fast syscall for all threads arch/arm64/Kconfig.turbo | 13 + arch/arm64/configs/openeuler_defconfig | 1 + arch/arm64/include/asm/exception.h | 4 +- arch/arm64/include/asm/mmu_context.h | 7 - arch/arm64/include/asm/xcall.h | 154 ++++---- arch/arm64/kernel/cpufeature.c | 79 ++-- arch/arm64/kernel/entry-common.c | 28 +- arch/arm64/kernel/entry.S | 86 +---- arch/arm64/kernel/probes/uprobes.c | 6 + arch/arm64/kernel/process.c | 5 + arch/arm64/kernel/syscall.c | 14 + arch/arm64/kernel/xcall/Makefile | 3 +- arch/arm64/kernel/xcall/core.c | 403 +++++++++++++++++++++ arch/arm64/kernel/xcall/entry.S | 139 +++++-- arch/arm64/kernel/xcall/proc.c | 229 ++++++++++++ arch/arm64/kernel/xcall/xcall.c | 66 ++-- arch/arm64/kvm/sys_regs.c | 1 + drivers/staging/Kconfig | 2 + drivers/staging/Makefile | 1 + drivers/staging/xcall/Kconfig | 19 + drivers/staging/xcall/Makefile | 1 + drivers/staging/xcall/dynamic_xcall_test.c | 89 +++++ fs/proc/proc_xcall.c | 144 ++------ include/linux/mm_types.h | 4 + include/linux/xcall.h | 51 +++ kernel/events/uprobes.c | 23 ++ kernel/fork.c | 3 + mm/mmap.c | 14 +- 28 files changed, 1215 insertions(+), 374 deletions(-) create mode 100644 arch/arm64/kernel/xcall/core.c create mode 100644 arch/arm64/kernel/xcall/proc.c create mode 100644 drivers/staging/xcall/Kconfig create mode 100644 drivers/staging/xcall/Makefile create mode 100644 drivers/staging/xcall/dynamic_xcall_test.c create mode 100644 include/linux/xcall.h -- 2.34.1

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[PATCH openEuler-1.0-LTS 0/2] Fix CVE-2025-39964
by Gu Bowen 14 Nov '25

14 Nov '25

CVE-2025-39964 Eric Biggers (1): crypto: af_alg - Fix incorrect boolean values in af_alg_ctx Herbert Xu (1): crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg crypto/af_alg.c | 7 +++++++ include/crypto/if_alg.h | 10 ++++++---- 2 files changed, 13 insertions(+), 4 deletions(-) -- 2.43.0

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[PATCH OLK-6.6 0/5] zcopy: A zero-copy data transfer mechanism for HPC
by Liu Mingrui 14 Nov '25

14 Nov '25

This patchset provides a PAGEATTACH mechanism, a zero-copy data transfer solution optimized for High Performance Computing (HPC) workloads. It allows direct sharing of physical memory pages between distinct processes by mapping source pages to a target address space, eliminating redundant data copying and improving large data transfer efficiency. Key features: - Supports zero-copy communication between intra-node processes. - Handles both PTE-level small pages and PMD-level huge pages (2MB). Liu Mingrui (5): zcopy: Initialize zcopy module zcopy: Introduce the pageattach interface zcopy: Extend PMD trans hugepage mapping ability zcopy: Add tracepoint for PageAttach zcopy: Add debug inerface dump_pagetable MAINTAINERS | 6 + drivers/Kconfig | 2 + drivers/Makefile | 3 + drivers/zcopy/Kconfig | 32 ++ drivers/zcopy/Makefile | 2 + drivers/zcopy/zcopy.c | 902 ++++++++++++++++++++++++++++++++++ include/trace/events/attach.h | 157 ++++++ 7 files changed, 1104 insertions(+) create mode 100644 drivers/zcopy/Kconfig create mode 100644 drivers/zcopy/Makefile create mode 100644 drivers/zcopy/zcopy.c create mode 100644 include/trace/events/attach.h -- 2.25.1

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[openeuler:OLK-6.6 3184/3184] drivers/net/ethernet/wangxun/ngbe/ngbe_sriov.c:1079:2: warning: unannotated fall-through between switch labels
by kernel test robot 14 Nov '25

14 Nov '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5cd3a0597fbb381c1713f27fe723b340d36f331a commit: 0e80b39fcf6c1b2a13b11f8632b185a89b012b14 [3184/3184] net: wangxun: ngbe: add support for wangxun 1G config: loongarch-randconfig-002-20251114 (https://download.01.org/0day-ci/archive/20251114/202511140839.9biSTcQm-lkp@…) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 0bba1e76581bad04e7d7f09f5115ae5e2989e0d9) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251114/202511140839.9biSTcQm-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202511140839.9biSTcQm-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/net/ethernet/wangxun/ngbe/ngbe_sriov.c:1079:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] 1079 | case NGBE_VF_BACKUP: | ^ drivers/net/ethernet/wangxun/ngbe/ngbe_sriov.c:1079:2: note: insert 'break;' to avoid fall-through 1079 | case NGBE_VF_BACKUP: | ^ | break; 1 warning generated. -- In file included from drivers/net/ethernet/wangxun/ngbe/ngbe_main.c:43: In file included from include/net/vxlan.h:11: In file included from include/net/nexthop.h:17: include/net/ip6_fib.h:281:10: warning: default initialization of an object of type 'typeof (f6i->expires)' (aka 'const unsigned long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe] 281 | return time_after(jiffies, f6i->expires); | ^ include/linux/jiffies.h:126:3: note: expanded from macro 'time_after' 126 | typecheck(unsigned long, b) && \ | ^ include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck' 11 | typeof(x) __dummy2; \ | ^ drivers/net/ethernet/wangxun/ngbe/ngbe_main.c:3772:6: warning: variable 'vlvfb' set but not used [-Wunused-but-set-variable] 3772 | u32 vlvfb; | ^ >> drivers/net/ethernet/wangxun/ngbe/ngbe_main.c:3878:20: warning: variable 'vlnctrl' set but not used [-Wunused-but-set-variable] 3878 | u32 fctrl, vmolr, vlnctrl; | ^ drivers/net/ethernet/wangxun/ngbe/ngbe_main.c:6911:13: warning: unused function 'ngbe_netpoll' [-Wunused-function] 6911 | static void ngbe_netpoll(struct net_device *netdev) | ^~~~~~~~~~~~ 4 warnings generated. -- >> drivers/net/ethernet/wangxun/ngbe/ngbe_ptp.c:631:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] 631 | case HWTSTAMP_TX_ON: | ^ drivers/net/ethernet/wangxun/ngbe/ngbe_ptp.c:631:2: note: insert 'break;' to avoid fall-through 631 | case HWTSTAMP_TX_ON: | ^ | break; 1 warning generated. vim +1079 drivers/net/ethernet/wangxun/ngbe/ngbe_sriov.c 1005 1006 static int ngbe_rcv_msg_from_vf(struct ngbe_adapter *adapter, u16 vf) 1007 { 1008 u16 mbx_size = NGBE_VXMAILBOX_SIZE; 1009 u32 msgbuf[NGBE_VXMAILBOX_SIZE]; 1010 struct ngbe_hw *hw = &adapter->hw; 1011 s32 retval; 1012 1013 retval = ngbe_read_mbx(hw, msgbuf, mbx_size, vf); 1014 1015 if (retval) { 1016 pr_err("Error receiving message from VF\n"); 1017 return retval; 1018 } 1019 1020 /* this is a message we already processed, do nothing */ 1021 if (msgbuf[0] & (NGBE_VT_MSGTYPE_ACK | NGBE_VT_MSGTYPE_NACK)) 1022 return retval; 1023 1024 /* flush the ack before we write any messages back */ 1025 NGBE_WRITE_FLUSH(hw); 1026 1027 if (msgbuf[0] == NGBE_VF_RESET) 1028 return ngbe_vf_reset_msg(adapter, vf); 1029 1030 /* until the vf completes a virtual function reset it should not be 1031 * allowed to start any configuration. 1032 */ 1033 1034 if (!adapter->vfinfo[vf].clear_to_send) { 1035 msgbuf[0] |= NGBE_VT_MSGTYPE_NACK; 1036 ngbe_write_mbx(hw, msgbuf, 1, vf); 1037 return retval; 1038 } 1039 1040 switch ((msgbuf[0] & 0xFFFF)) { 1041 case NGBE_VF_SET_MAC_ADDR: 1042 retval = ngbe_set_vf_mac_addr(adapter, msgbuf, vf); 1043 break; 1044 case NGBE_VF_SET_MULTICAST: 1045 retval = ngbe_set_vf_multicasts(adapter, msgbuf, vf); 1046 break; 1047 case NGBE_VF_SET_VLAN: 1048 retval = ngbe_set_vf_vlan_msg(adapter, msgbuf, vf); 1049 break; 1050 case NGBE_VF_SET_LPE: 1051 if (msgbuf[1] > NGBE_MAX_JUMBO_FRAME_SIZE) { 1052 e_err(drv, 1053 "VF max_frame %d exceed MAX_JUMBO_FRAME_SIZE\n", 1054 msgbuf[1]); 1055 return -EINVAL; 1056 } 1057 retval = ngbe_set_vf_lpe(adapter, msgbuf[1], vf); 1058 break; 1059 case NGBE_VF_SET_MACVLAN: 1060 retval = ngbe_set_vf_macvlan_msg(adapter, msgbuf, vf); 1061 break; 1062 case NGBE_VF_API_NEGOTIATE: 1063 retval = ngbe_negotiate_vf_api(adapter, msgbuf, vf); 1064 break; 1065 case NGBE_VF_GET_QUEUES: 1066 retval = ngbe_get_vf_queues(adapter, msgbuf, vf); 1067 break; 1068 case NGBE_VF_UPDATE_XCAST_MODE: 1069 retval = ngbe_update_vf_xcast_mode(adapter, msgbuf, vf); 1070 break; 1071 case NGBE_VF_GET_LINK_STATE: 1072 retval = ngbe_get_vf_link_state(adapter, msgbuf, vf); 1073 break; 1074 case NGBE_VF_GET_LINK_STATUS: 1075 retval = ngbe_get_vf_link_status(adapter, msgbuf, vf); 1076 break; 1077 case NGBE_VF_GET_FW_VERSION: 1078 retval = ngbe_get_fw_version(adapter, msgbuf, vf); > 1079 case NGBE_VF_BACKUP: 1080 break; 1081 default: 1082 e_err(drv, "Unhandled Msg %8.8x\n", msgbuf[0]); 1083 retval = NGBE_ERR_MBX; 1084 break; 1085 } 1086 1087 /* notify the VF of the results of what it sent us */ 1088 if (retval) 1089 msgbuf[0] |= NGBE_VT_MSGTYPE_NACK; 1090 else 1091 msgbuf[0] |= NGBE_VT_MSGTYPE_ACK; 1092 1093 msgbuf[0] |= NGBE_VT_MSGTYPE_CTS; 1094 1095 ngbe_write_mbx(hw, msgbuf, mbx_size, vf); 1096 1097 return retval; 1098 } 1099 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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