Xen project Mailing List

Re: [RFC 0/5] Introduce dynamic tracer using Livepatch

From: Ryo Takakura <takakura@xxxxxxxxxxxxx>

Date: Sun, 1 Nov 2026 10:54:24 +0900

Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=valinux.co.jp; dmarc=pass action=none header.from=valinux.co.jp; dkim=pass header.d=valinux.co.jp; arc=none

Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=sL5SxGpPzhzvX7dPFXAB/JSuM8gKeu9uYyfyp54+tP0=; b=iJ3sCsIJmIbMVw33ZXLJAz23ErgJfAWo5O6RhdhinRTe7Az0n5NKE86IEhpovfvo82cA5PqRjMb3RqOpDYrpjNJbO6iNDLlv0yn+fCFokoJnJM5ZKusxhM4tOPzVYb5EodmTTi7F1XwEZ4OtbwYH/wihNcA3YRyqS6dgAJh/oIxZ3Rdf694LzUod0W+vnLVYpW3aYE4gihBCbPKNQFZLVsYkHPwLRNjsuXTxccZa1aqM8kTesAB/sYd5Pt2Fe1faW5pteHfqNGrum6ZXxOYazN0lgsm3kRPy6tR2a9WEW2+9Hcou+Fz8grTl1/ioPtfLOjnBtZsuXAEl6V+Vz+HmxQ==

Arc-seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=jI4Cz6b0qjNjo00eoVNVJ8m7iV5vxXO+M/7qyry6kfX8fcrLdvS07BvTl0oxWzKXHrpGgYh4BR7ByRpGiJBEGYwRa9tYt7BOiCiXg6EeDDxDUlsuD0V8RVJHIGn8hj35Jk46ZC+l/iHs3nFzL4L16dNnWjbmqq7XeTOu2yRhoaBG7Zuc+xpWQTmIGdCPJOBTDZNzcxcMAk41vJ0rvgQT/zpMJ37fHwIItqacFxeajxWdpHf9Mc3Hl717Lstm8RN74/dDaqU/njvERrfWj2h0kqwfW8kZn/qcbiJyTnRNTeURANDYCGv4LHw3rblpgZG5mucwPzmO4Gy1NDukmOKd8Q==

Authentication-results: eu.smtp.expurgate.cloud; dkim=pass header.s=selector1 header.d=valinux.co.jp header.i="@valinux.co.jp" header.h="From:Date:Subject:Message-Id:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck"

Authentication-results: mx.microsoft.com 1; dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=valinux.co.jp;

Cc: takakura@xxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx

Delivery-date: Sun, 01 Nov 2026 01:55:12 +0000

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

Hi, Jan! Thank you for taking a look at the series. On, Fri, 30 Oct 2026 11:31:23 +0100, Jan Beulich wrote: >On 23.10.2026 06:48, Ryo Takakura wrote: >> Ryo Takakura (5): >> xen/arm64: livepatch: enable attaching callbacks >> xen/livepatch: Allow tracers to schedule livepatch >> xen/tracing: prepare a livepatch payload and its controling interface >> xen/tracing: Add a function tracer >> xen/x86: livepatch: enable attaching callbacks >> >> xen/arch/arm/Kconfig | 13 + >> xen/arch/arm/arch.mk | 3 + >> xen/arch/arm/arm64/Makefile | 1 + >> xen/arch/arm/arm64/insn.c | 5 + >> xen/arch/arm/arm64/livepatch-asm.S | 68 +++ >> xen/arch/arm/arm64/livepatch.c | 39 ++ >> xen/arch/arm/include/asm/arm64/insn.h | 1 + >> xen/arch/arm/xen.lds.S | 5 + >> xen/arch/x86/Kconfig | 13 + >> xen/arch/x86/Makefile | 1 + >> xen/arch/x86/arch.mk | 3 + >> xen/arch/x86/livepatch-asm.S | 60 +++ >> xen/arch/x86/livepatch.c | 33 ++ >> xen/arch/x86/xen.lds.S | 5 + >> xen/common/Kconfig | 12 + >> xen/common/Makefile | 6 + >> xen/common/function_trace.c | 274 ++++++++++ >> xen/common/hypfs_trace.c | 743 ++++++++++++++++++++++++++ >> xen/common/livepatch.c | 137 ++++- >> xen/include/xen/hypfs_trace.h | 42 ++ >> xen/include/xen/livepatch.h | 14 + >> xen/include/xen/livepatch_payload.h | 7 +- >> 22 files changed, 1478 insertions(+), 7 deletions(-) >> create mode 100644 xen/arch/arm/arm64/livepatch-asm.S >> create mode 100644 xen/arch/x86/livepatch-asm.S >> create mode 100644 xen/common/function_trace.c >> create mode 100644 xen/common/hypfs_trace.c >> create mode 100644 xen/include/xen/hypfs_trace.h > >Nit: Dashes in favor of underscores please in new files' names. Understood. I'll rename them in the next version. Sincerely, Ryo Takakura

©2013 Xen Project, A Linux Foundation Collaborative Project. All Rights Reserved.
Linux Foundation is a registered trademark of The Linux Foundation.
Xen Project is a trademark of The Linux Foundation.