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Smith" , Stefano Stabellini Subject: [PATCH v3 1/3] xen: kconfig: rename MEM_ACCESS -> VM_EVENT Date: Tue, 11 Mar 2025 12:23:12 +0200 Message-Id: <8d35ec8373b65bca2fe471eac7a17cb2a98db3fc.1741687645.git.Sergiy_Kibrik@epam.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZM-MESSAGEID: 1741688639596019100 Content-Type: text/plain; charset="utf-8" Use more generic CONFIG_VM_EVENT name throughout Xen code instead of CONFIG_MEM_ACCESS. This reflects the fact that vm_event is a higher level feature, with mem_access & monitor depending on it. CC: Jan Beulich Suggested-by: Tamas K Lengyel Acked-by: Tamas K Lengyel Signed-off-by: Sergiy Kibrik --- changes in v3: - squash with automation patch - tags & minor addition of blanks --- automation/gitlab-ci/build.yaml | 2 +- xen/arch/arm/Makefile | 2 +- xen/arch/arm/configs/tiny64_defconfig | 2 +- xen/arch/arm/include/asm/mem_access.h | 4 ++-- xen/arch/ppc/configs/ppc64_defconfig | 2 +- xen/arch/riscv/configs/tiny64_defconfig | 2 +- xen/arch/x86/mm/Makefile | 2 +- xen/common/Kconfig | 2 +- xen/common/Makefile | 2 +- xen/common/domctl.c | 2 +- xen/include/xen/mem_access.h | 6 +++--- xen/include/xsm/dummy.h | 2 +- xen/include/xsm/xsm.h | 4 ++-- xen/xsm/dummy.c | 2 +- xen/xsm/flask/hooks.c | 4 ++-- 15 files changed, 20 insertions(+), 20 deletions(-) diff --git a/automation/gitlab-ci/build.yaml b/automation/gitlab-ci/build.y= aml index 034d6d9c3a..b6383c4fc8 100644 --- a/automation/gitlab-ci/build.yaml +++ b/automation/gitlab-ci/build.yaml @@ -744,7 +744,7 @@ debian-12-riscv64-gcc: CONFIG_EXPERT=3Dy CONFIG_GRANT_TABLE=3Dn CONFIG_LIVEPATCH=3Dn - CONFIG_MEM_ACCESS=3Dn + CONFIG_VM_EVENT=3Dn CONFIG_QEMU_PLATFORM=3Dy CONFIG_XSM=3Dn =20 diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile index fb0948f067..3bd5125e64 100644 --- a/xen/arch/arm/Makefile +++ b/xen/arch/arm/Makefile @@ -38,7 +38,7 @@ obj-y +=3D irq.o obj-y +=3D kernel.init.o obj-$(CONFIG_LIVEPATCH) +=3D livepatch.o obj-$(CONFIG_LLC_COLORING) +=3D llc-coloring.o -obj-$(CONFIG_MEM_ACCESS) +=3D mem_access.o +obj-$(CONFIG_VM_EVENT) +=3D mem_access.o obj-y +=3D mm.o obj-y +=3D monitor.o obj-y +=3D p2m.o diff --git a/xen/arch/arm/configs/tiny64_defconfig b/xen/arch/arm/configs/t= iny64_defconfig index cc6d93f2f8..469a1eb9f9 100644 --- a/xen/arch/arm/configs/tiny64_defconfig +++ b/xen/arch/arm/configs/tiny64_defconfig @@ -5,7 +5,7 @@ CONFIG_ARM=3Dy # Architecture Features # # CONFIG_GICV3 is not set -# CONFIG_MEM_ACCESS is not set +# CONFIG_VM_EVENT is not set # CONFIG_SBSA_VUART_CONSOLE is not set =20 # diff --git a/xen/arch/arm/include/asm/mem_access.h b/xen/arch/arm/include/a= sm/mem_access.h index abac8032fc..d42f28e8b7 100644 --- a/xen/arch/arm/include/asm/mem_access.h +++ b/xen/arch/arm/include/asm/mem_access.h @@ -37,7 +37,7 @@ static inline bool p2m_mem_access_sanity_check(struct dom= ain *d) * Send mem event based on the access. Boolean return value indicates if t= rap * needs to be injected into guest. */ -#ifdef CONFIG_MEM_ACCESS +#ifdef CONFIG_VM_EVENT bool p2m_mem_access_check(paddr_t gpa, vaddr_t gla, const struct npfec npf= ec); =20 struct page_info* @@ -58,7 +58,7 @@ p2m_mem_access_check_and_get_page(vaddr_t gva, unsigned l= ong flag, return NULL; } =20 -#endif /*CONFIG_MEM_ACCESS*/ +#endif /* CONFIG_VM_EVENT */ #endif /* _ASM_ARM_MEM_ACCESS_H */ =20 /* diff --git a/xen/arch/ppc/configs/ppc64_defconfig b/xen/arch/ppc/configs/pp= c64_defconfig index 4924d881a2..d6aaf772e7 100644 --- a/xen/arch/ppc/configs/ppc64_defconfig +++ b/xen/arch/ppc/configs/ppc64_defconfig @@ -1,6 +1,6 @@ # CONFIG_GRANT_TABLE is not set # CONFIG_SPECULATIVE_HARDEN_ARRAY is not set -# CONFIG_MEM_ACCESS is not set +# CONFIG_VM_EVENT is not set =20 CONFIG_PPC64=3Dy CONFIG_DEBUG=3Dy diff --git a/xen/arch/riscv/configs/tiny64_defconfig b/xen/arch/riscv/confi= gs/tiny64_defconfig index bb3ae26a44..2399f7b918 100644 --- a/xen/arch/riscv/configs/tiny64_defconfig +++ b/xen/arch/riscv/configs/tiny64_defconfig @@ -1,6 +1,6 @@ # CONFIG_BOOT_TIME_CPUPOOLS is not set # CONFIG_GRANT_TABLE is not set -# CONFIG_MEM_ACCESS is not set +# CONFIG_VM_EVENT is not set # CONFIG_COVERAGE is not set # CONFIG_LIVEPATCH is not set # CONFIG_XSM is not set diff --git a/xen/arch/x86/mm/Makefile b/xen/arch/x86/mm/Makefile index 0345388359..960f6e8409 100644 --- a/xen/arch/x86/mm/Makefile +++ b/xen/arch/x86/mm/Makefile @@ -4,7 +4,7 @@ obj-$(CONFIG_HVM) +=3D hap/ obj-$(CONFIG_ALTP2M) +=3D altp2m.o obj-$(CONFIG_HVM) +=3D guest_walk_2.o guest_walk_3.o guest_walk_4.o obj-$(CONFIG_SHADOW_PAGING) +=3D guest_walk_4.o -obj-$(CONFIG_MEM_ACCESS) +=3D mem_access.o +obj-$(CONFIG_VM_EVENT) +=3D mem_access.o obj-$(CONFIG_MEM_PAGING) +=3D mem_paging.o obj-$(CONFIG_MEM_SHARING) +=3D mem_sharing.o obj-$(CONFIG_HVM) +=3D nested.o diff --git a/xen/common/Kconfig b/xen/common/Kconfig index 6166327f4d..a6aa2c5c14 100644 --- a/xen/common/Kconfig +++ b/xen/common/Kconfig @@ -92,7 +92,7 @@ config HAS_VMAP config MEM_ACCESS_ALWAYS_ON bool =20 -config MEM_ACCESS +config VM_EVENT def_bool MEM_ACCESS_ALWAYS_ON prompt "Memory Access and VM events" if !MEM_ACCESS_ALWAYS_ON depends on HVM diff --git a/xen/common/Makefile b/xen/common/Makefile index cba3b32733..b71d4b3efa 100644 --- a/xen/common/Makefile +++ b/xen/common/Makefile @@ -26,7 +26,7 @@ obj-$(CONFIG_KEXEC) +=3D kexec.o obj-$(CONFIG_KEXEC) +=3D kimage.o obj-$(CONFIG_LIVEPATCH) +=3D livepatch.o livepatch_elf.o obj-$(CONFIG_LLC_COLORING) +=3D llc-coloring.o -obj-$(CONFIG_MEM_ACCESS) +=3D mem_access.o +obj-$(CONFIG_VM_EVENT) +=3D mem_access.o obj-y +=3D memory.o obj-y +=3D multicall.o obj-y +=3D notifier.o diff --git a/xen/common/domctl.c b/xen/common/domctl.c index b897ca8723..bfe2e1f9f0 100644 --- a/xen/common/domctl.c +++ b/xen/common/domctl.c @@ -809,7 +809,7 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_d= omctl) copyback =3D true; break; =20 -#ifdef CONFIG_MEM_ACCESS +#ifdef CONFIG_VM_EVENT case XEN_DOMCTL_set_access_required: if ( unlikely(current->domain =3D=3D d) ) /* no domain_pause() */ ret =3D -EPERM; diff --git a/xen/include/xen/mem_access.h b/xen/include/xen/mem_access.h index 2231341b5d..4de651038d 100644 --- a/xen/include/xen/mem_access.h +++ b/xen/include/xen/mem_access.h @@ -33,7 +33,7 @@ */ struct vm_event_st; =20 -#ifdef CONFIG_MEM_ACCESS +#ifdef CONFIG_VM_EVENT #include #endif =20 @@ -99,7 +99,7 @@ long p2m_set_mem_access_multi(struct domain *d, int p2m_get_mem_access(struct domain *d, gfn_t gfn, xenmem_access_t *acces= s, unsigned int altp2m_idx); =20 -#ifdef CONFIG_MEM_ACCESS +#ifdef CONFIG_VM_EVENT int mem_access_memop(unsigned long cmd, XEN_GUEST_HANDLE_PARAM(xen_mem_access_op_t) arg); #else @@ -109,7 +109,7 @@ int mem_access_memop(unsigned long cmd, { return -ENOSYS; } -#endif /* CONFIG_MEM_ACCESS */ +#endif /* CONFIG_VM_EVENT */ =20 #endif /* _XEN_MEM_ACCESS_H */ =20 diff --git a/xen/include/xsm/dummy.h b/xen/include/xsm/dummy.h index a8d06de6b0..9227205fcd 100644 --- a/xen/include/xsm/dummy.h +++ b/xen/include/xsm/dummy.h @@ -647,7 +647,7 @@ static XSM_INLINE int cf_check xsm_vm_event_control( return xsm_default_action(action, current->domain, d); } =20 -#ifdef CONFIG_MEM_ACCESS +#ifdef CONFIG_VM_EVENT static XSM_INLINE int cf_check xsm_mem_access(XSM_DEFAULT_ARG struct domai= n *d) { XSM_ASSERT_ACTION(XSM_DM_PRIV); diff --git a/xen/include/xsm/xsm.h b/xen/include/xsm/xsm.h index 8c33b055fc..24acc16125 100644 --- a/xen/include/xsm/xsm.h +++ b/xen/include/xsm/xsm.h @@ -153,7 +153,7 @@ struct xsm_ops { =20 int (*vm_event_control)(struct domain *d, int mode, int op); =20 -#ifdef CONFIG_MEM_ACCESS +#ifdef CONFIG_VM_EVENT int (*mem_access)(struct domain *d); #endif =20 @@ -637,7 +637,7 @@ static inline int xsm_vm_event_control( return alternative_call(xsm_ops.vm_event_control, d, mode, op); } =20 -#ifdef CONFIG_MEM_ACCESS +#ifdef CONFIG_VM_EVENT static inline int xsm_mem_access(xsm_default_t def, struct domain *d) { return alternative_call(xsm_ops.mem_access, d); diff --git a/xen/xsm/dummy.c b/xen/xsm/dummy.c index ce6fbdc6c5..93fbfc43cc 100644 --- a/xen/xsm/dummy.c +++ b/xen/xsm/dummy.c @@ -111,7 +111,7 @@ static const struct xsm_ops __initconst_cf_clobber dumm= y_ops =3D { =20 .vm_event_control =3D xsm_vm_event_control, =20 -#ifdef CONFIG_MEM_ACCESS +#ifdef CONFIG_VM_EVENT .mem_access =3D xsm_mem_access, #endif =20 diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c index 389707a164..6a53487ea4 100644 --- a/xen/xsm/flask/hooks.c +++ b/xen/xsm/flask/hooks.c @@ -1362,7 +1362,7 @@ static int cf_check flask_vm_event_control(struct dom= ain *d, int mode, int op) return current_has_perm(d, SECCLASS_DOMAIN2, DOMAIN2__VM_EVENT); 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charset="utf-8" Replace more general CONFIG_HVM option with CONFIG_VM_EVENT which is more relevant and specific to monitoring. This is only to clarify at build level to which subsystem this file belongs. No functional change here, as VM_EVENT depends on HVM. Acked-by: Jan Beulich Signed-off-by: Sergiy Kibrik --- xen/arch/x86/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile index c763f80b0b..f59c9665fd 100644 --- a/xen/arch/x86/Makefile +++ b/xen/arch/x86/Makefile @@ -49,7 +49,7 @@ obj-$(CONFIG_PV) +=3D ioport_emulate.o obj-y +=3D irq.o obj-$(CONFIG_KEXEC) +=3D machine_kexec.o obj-y +=3D mm.o x86_64/mm.o -obj-$(CONFIG_HVM) +=3D monitor.o +obj-$(CONFIG_VM_EVENT) +=3D monitor.o obj-y +=3D mpparse.o obj-y +=3D nmi.o obj-y +=3D numa.o --=20 2.25.1 From nobody Fri Dec 19 04:18:19 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; 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charset="utf-8" From: Stefano Stabellini Extend coverage of CONFIG_VM_EVENT option and make the build of VM events and monitoring support optional. Also make MEM_PAGING option depend on VM_E= VENT to document that mem_paging is relying on vm_event. This is to reduce code size on Arm when this option isn't enabled. CC: Jan Beulich CC: Tamas K Lengyel Reviewed-by: Ayan Kumar Halder Signed-off-by: Stefano Stabellini Signed-off-by: Sergiy Kibrik --- changes in v3: - add dependency MEM_PAGING -> VM_EVENT - monitor_domctl() stub returns -EOPNOTSUPP changes in v2: - rename CONFIG_MEM_ACCESS -> CONFIG_VM_EVENT - tags --- xen/arch/arm/Makefile | 4 ++-- xen/arch/arm/vsmc.c | 3 ++- xen/arch/x86/Kconfig | 2 +- xen/common/Makefile | 4 ++-- xen/include/xen/monitor.h | 9 +++++++++ xen/include/xen/vm_event.h | 14 +++++++++++--- 6 files changed, 27 insertions(+), 9 deletions(-) diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile index 3bd5125e64..4837ad467a 100644 --- a/xen/arch/arm/Makefile +++ b/xen/arch/arm/Makefile @@ -40,7 +40,7 @@ obj-$(CONFIG_LIVEPATCH) +=3D livepatch.o obj-$(CONFIG_LLC_COLORING) +=3D llc-coloring.o obj-$(CONFIG_VM_EVENT) +=3D mem_access.o obj-y +=3D mm.o -obj-y +=3D monitor.o +obj-$(CONFIG_VM_EVENT) +=3D monitor.o obj-y +=3D p2m.o obj-y +=3D platform.o obj-y +=3D platform_hypercall.o @@ -66,7 +66,7 @@ obj-$(CONFIG_VGICV2) +=3D vgic-v2.o obj-$(CONFIG_GICV3) +=3D vgic-v3.o obj-$(CONFIG_HAS_ITS) +=3D vgic-v3-its.o endif -obj-y +=3D vm_event.o +obj-$(CONFIG_VM_EVENT) +=3D vm_event.o obj-y +=3D vtimer.o obj-$(CONFIG_SBSA_VUART_CONSOLE) +=3D vpl011.o obj-y +=3D vsmc.o diff --git a/xen/arch/arm/vsmc.c b/xen/arch/arm/vsmc.c index e253865b6c..6081f14ed0 100644 --- a/xen/arch/arm/vsmc.c +++ b/xen/arch/arm/vsmc.c @@ -330,7 +330,8 @@ void do_trap_smc(struct cpu_user_regs *regs, const unio= n hsr hsr) } =20 /* If monitor is enabled, let it handle the call. */ - if ( current->domain->arch.monitor.privileged_call_enabled ) + if ( IS_ENABLED(CONFIG_VM_EVENT) && + current->domain->arch.monitor.privileged_call_enabled ) rc =3D monitor_smc(); =20 if ( rc =3D=3D 1 ) diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig index 6e41bc0fb4..f086799594 100644 --- a/xen/arch/x86/Kconfig +++ b/xen/arch/x86/Kconfig @@ -350,7 +350,7 @@ endif =20 config MEM_PAGING bool "Xen memory paging support (UNSUPPORTED)" if UNSUPPORTED - depends on HVM + depends on HVM && VM_EVENT =20 config MEM_SHARING bool "Xen memory sharing support (UNSUPPORTED)" if UNSUPPORTED diff --git a/xen/common/Makefile b/xen/common/Makefile index b71d4b3efa..ac23120d7d 100644 --- a/xen/common/Makefile +++ b/xen/common/Makefile @@ -54,7 +54,7 @@ obj-y +=3D timer.o obj-$(CONFIG_TRACEBUFFER) +=3D trace.o obj-y +=3D version.o obj-y +=3D virtual_region.o -obj-y +=3D vm_event.o +obj-$(CONFIG_VM_EVENT) +=3D vm_event.o obj-$(CONFIG_HAS_VMAP) +=3D vmap.o obj-y +=3D vsprintf.o obj-y +=3D wait.o @@ -68,7 +68,7 @@ obj-$(CONFIG_COMPAT) +=3D $(addprefix compat/,domain.o me= mory.o multicall.o xlat.o =20 ifneq ($(CONFIG_PV_SHIM_EXCLUSIVE),y) obj-y +=3D domctl.o -obj-y +=3D monitor.o +obj-$(CONFIG_VM_EVENT) +=3D monitor.o obj-y +=3D sysctl.o endif =20 diff --git a/xen/include/xen/monitor.h b/xen/include/xen/monitor.h index 713d54f7c1..634b6cd2a1 100644 --- a/xen/include/xen/monitor.h +++ b/xen/include/xen/monitor.h @@ -27,8 +27,17 @@ struct domain; struct xen_domctl_monitor_op; =20 +#ifdef CONFIG_VM_EVENT int monitor_domctl(struct domain *d, struct xen_domctl_monitor_op *mop); void monitor_guest_request(void); +#else +static inline int monitor_domctl(struct domain *d, + struct xen_domctl_monitor_op *mop) +{ + return -EOPNOTSUPP; +} +static inline void monitor_guest_request(void) {} +#endif =20 int monitor_traps(struct vcpu *v, bool sync, vm_event_request_t *req); =20 diff --git a/xen/include/xen/vm_event.h b/xen/include/xen/vm_event.h index 9a86358b42..268c85fc4f 100644 --- a/xen/include/xen/vm_event.h +++ b/xen/include/xen/vm_event.h @@ -50,9 +50,6 @@ struct vm_event_domain unsigned int last_vcpu_wake_up; }; =20 -/* Clean up on domain destruction */ -void vm_event_cleanup(struct domain *d); - /* Returns whether a ring has been set up */ bool vm_event_check_ring(struct vm_event_domain *ved); =20 @@ -88,7 +85,18 @@ void vm_event_cancel_slot(struct domain *d, struct vm_ev= ent_domain *ved); void vm_event_put_request(struct domain *d, struct vm_event_domain *ved, vm_event_request_t *req); =20 +#ifdef CONFIG_VM_EVENT +/* Clean up on domain destruction */ +void vm_event_cleanup(struct domain *d); int vm_event_domctl(struct domain *d, struct xen_domctl_vm_event_op *vec); +#else +static inline void vm_event_cleanup(struct domain *d) {} +static inline int vm_event_domctl(struct domain *d, + struct xen_domctl_vm_event_op *vec) +{ + return -EINVAL; +} +#endif =20 void vm_event_vcpu_pause(struct vcpu *v); void vm_event_vcpu_unpause(struct vcpu *v); --=20 2.25.1