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h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=BjV4dXIDIbWp0L8VeuBDiAUAVrHgampbCea6EtH+5mI=; b=q5vLtFoUgZUqeueL283qLg8Hlv4D/boFmzocIFugY9MCjG7V2AKNp6gN/LiuygHiPVEb9sCtYTLsvGCcwji1LijAShDk1B0GoaKjtkyZGW1SBZbBW4K4bUHOXsmo/BcavyD7DeLEtb3RIZ8HibB5UVrUwmpm0fCBzDGlT8DlhgI= X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C From: Penny Zheng To: CC: , Stefano Stabellini , "Jan Beulich" , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Anthony PERARD , Michal Orzel , "Julien Grall" , Stefano Stabellini , "Sergiy Kibrik" , Penny Zheng Subject: [PATCH v5 18/18] xen/sysctl: wrap around sysctl hypercall Date: Mon, 16 Jun 2025 14:41:28 +0800 Message-ID: <20250616064128.581164-19-Penny.Zheng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250616064128.581164-1-Penny.Zheng@amd.com> References: <20250616064128.581164-1-Penny.Zheng@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE3D:EE_|CY3PR12MB9555:EE_ X-MS-Office365-Filtering-Correlation-Id: d507cb0d-5841-4c08-f6c3-08ddaca10133 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|1800799024|376014; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jun 2025 06:42:46.5373 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d507cb0d-5841-4c08-f6c3-08ddaca10133 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE3D.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY3PR12MB9555 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1750056687972116600 Content-Type: text/plain; charset="utf-8" From: Stefano Stabellini Wrap sysctl hypercall def and sysctl.o with CONFIG_SYSCTL, and since PV_SHIM_EXCLUSIVE needs sorting in the future, we move them out of PV_SHIM_EXCLUSIVE condition at the same time. We need to make SYSCTL with prompt back, add help info and set default value as y. We shall at least provide "# CONFIG_SYSCTL is not set" in preset configs for PV shim on x86. Signed-off-by: Stefano Stabellini Signed-off-by: Sergiy Kibrik Signed-off-by: Penny Zheng Reviewed-by: Stefano Stabellini --- v1 -> v2: - remove all transient "#ifdef CONFIG_SYSCTL"-s in sysctl.c --- v2 -> v3: - move out of CONFIG_PV_SHIM_EXCLUSIVE condition --- v3 -> v4: - make SYSCTL with prompt - state unsetting SYSCTL in pvshim_defconfig --- v4 -> v5: - adapt to the new changes in commit "xen: introduce CONFIG_SYSCTL" - expand help info also for PV shim - refactor commit message --- xen/arch/x86/configs/pvshim_defconfig | 1 + xen/common/Kconfig | 6 +++++- xen/common/Makefile | 2 +- xen/include/hypercall-defs.c | 8 ++++++-- 4 files changed, 13 insertions(+), 4 deletions(-) diff --git a/xen/arch/x86/configs/pvshim_defconfig b/xen/arch/x86/configs/p= vshim_defconfig index 2ad27f898e..dff1ecf674 100644 --- a/xen/arch/x86/configs/pvshim_defconfig +++ b/xen/arch/x86/configs/pvshim_defconfig @@ -26,3 +26,4 @@ CONFIG_EXPERT=3Dy # CONFIG_INTEL_IOMMU is not set # CONFIG_DEBUG is not set # CONFIG_GDBSX is not set +# CONFIG_SYSCTL is not set diff --git a/xen/common/Kconfig b/xen/common/Kconfig index 65f07289dd..64865112a1 100644 --- a/xen/common/Kconfig +++ b/xen/common/Kconfig @@ -616,7 +616,11 @@ menu "Supported hypercall interfaces" visible if EXPERT =20 config SYSCTL - def_bool y + bool "Enable sysctl hypercall" + default y + help + This option shall only be disabled on some dom0less systems, or + PV shim on x86, to reduce Xen footprint. =20 endmenu =20 diff --git a/xen/common/Makefile b/xen/common/Makefile index 98f0873056..15ab048244 100644 --- a/xen/common/Makefile +++ b/xen/common/Makefile @@ -49,6 +49,7 @@ obj-y +=3D spinlock.o obj-$(CONFIG_STACK_PROTECTOR) +=3D stack-protector.o obj-y +=3D stop_machine.o obj-y +=3D symbols.o +obj-$(CONFIG_SYSCTL) +=3D sysctl.o obj-y +=3D tasklet.o obj-y +=3D time.o obj-y +=3D timer.o @@ -70,7 +71,6 @@ obj-$(CONFIG_COMPAT) +=3D $(addprefix compat/,domain.o me= mory.o multicall.o xlat.o ifneq ($(CONFIG_PV_SHIM_EXCLUSIVE),y) obj-y +=3D domctl.o obj-$(CONFIG_VM_EVENT) +=3D monitor.o -obj-y +=3D sysctl.o endif =20 extra-y :=3D symbols-dummy.o diff --git a/xen/include/hypercall-defs.c b/xen/include/hypercall-defs.c index 7720a29ade..c1081d87a2 100644 --- a/xen/include/hypercall-defs.c +++ b/xen/include/hypercall-defs.c @@ -194,8 +194,10 @@ kexec_op(unsigned long op, void *uarg) #ifdef CONFIG_IOREQ_SERVER dm_op(domid_t domid, unsigned int nr_bufs, xen_dm_op_buf_t *bufs) #endif -#ifndef CONFIG_PV_SHIM_EXCLUSIVE +#ifdef CONFIG_SYSCTL sysctl(xen_sysctl_t *u_sysctl) +#endif +#ifndef CONFIG_PV_SHIM_EXCLUSIVE domctl(xen_domctl_t *u_domctl) paging_domctl_cont(xen_domctl_t *u_domctl) platform_op(xen_platform_op_t *u_xenpf_op) @@ -273,8 +275,10 @@ physdev_op compat do h= vm hvm do_arm #ifdef CONFIG_HVM hvm_op do do do do do #endif -#ifndef CONFIG_PV_SHIM_EXCLUSIVE +#ifdef CONFIG_SYSCTL sysctl do do do do do +#endif +#ifndef CONFIG_PV_SHIM_EXCLUSIVE domctl do do do do do #endif #ifdef CONFIG_KEXEC --=20 2.34.1