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[PATCH v4 0/6] consolidate vm event subsystem

To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>, <jason.andryuk@xxxxxxx>

From: Penny Zheng <Penny.Zheng@xxxxxxx>

Date: Thu, 15 Jan 2026 17:28:35 +0800

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Cc: <ray.huang@xxxxxxx>, Penny Zheng <Penny.Zheng@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Tamas K Lengyel <tamas@xxxxxxxxxxxxx>, Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx>, "Petre Pircalabu" <ppircalabu@xxxxxxxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, "Julien Grall" <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>

Delivery-date: Thu, 15 Jan 2026 09:29:13 +0000

List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

This patch serie originates from "Disable domctl-op via CONFIG_MGMT_HYPERCALLS" [1], and focuses on consolidating vm event subsystem (i.e. VM_EVENT), and its derived features, like memory paging, etc. [1] https://www.mail-archive.com/xen-devel@xxxxxxxxxxxxxxxxxxxx/msg200843.html --- Happy 2026! Sorry for the late response to this patch serie and the domctl one. v4 is just doing a rebase on the latest staging, and one comment fix. I still need 2 acks for commit "xen/p2m: move xenmem_access_to_p2m_access() to common p2m.c" and "xen/mem_access: wrap memory access when VM_EVENT=n". --- Penny Zheng (6): xen/x86: move declaration from mem_access.h to altp2m.h x86/vm_event: introduce vm_event_is_enabled() x86/monitor: wrap monitor_op under CONFIG_VM_EVENT xen/p2m: move xenmem_access_to_p2m_access() to common p2m.c xen/mem_access: wrap memory access when VM_EVENT=n xen/vm_event: consolidate CONFIG_VM_EVENT xen/arch/x86/Makefile | 2 +- xen/arch/x86/hvm/Kconfig | 1 - xen/arch/x86/hvm/Makefile | 4 +- xen/arch/x86/hvm/emulate.c | 67 ++++++++++++------------ xen/arch/x86/hvm/hvm.c | 51 ++++++++++++++++--- xen/arch/x86/hvm/svm/intr.c | 2 +- xen/arch/x86/hvm/svm/svm.c | 54 ++++++++++++-------- xen/arch/x86/hvm/vmx/intr.c | 2 +- xen/arch/x86/hvm/vmx/vmx.c | 73 ++++++++++++++++++--------- xen/arch/x86/include/asm/altp2m.h | 10 ++++ xen/arch/x86/include/asm/hvm/hvm.h | 18 ++++--- xen/arch/x86/include/asm/mem_access.h | 20 ++++---- xen/arch/x86/include/asm/monitor.h | 9 ++++ xen/arch/x86/include/asm/vm_event.h | 5 ++ xen/arch/x86/mm/mem_access.c | 36 ------------- xen/arch/x86/mm/mem_sharing.c | 3 ++ xen/arch/x86/mm/p2m.c | 40 +++++++++++++++ xen/common/Kconfig | 7 +-- xen/include/xen/mem_access.h | 5 -- xen/include/xen/p2m-common.h | 3 ++ xen/include/xen/vm_event.h | 7 +++ 21 files changed, 266 insertions(+), 153 deletions(-) -- 2.34.1

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