From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wen Congyang Subject: [RFC Patch v2 01/16] xen: introduce new hypercall to reset vcpu Date: Thu, 11 Jul 2013 16:35:33 +0800 Message-ID: <1373531748-12547-2-git-send-email-wency@cn.fujitsu.com> References: <1373531748-12547-1-git-send-email-wency@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1373531748-12547-1-git-send-email-wency@cn.fujitsu.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Dong Eddie , Lai Jiangshan , xen-devl , Shriram Rajagopalan Cc: Jiang Yunhong , Wen Congyang , Ye Wei , Xu Yao , Hong Tao List-Id: xen-devel@lists.xenproject.org In colo mode, SVM is running, and it will create pagetable, use gdt... When we do a new checkpoint, we may need to rollback all this operations. This new hypercall will do this. Signed-off-by: Ye Wei Signed-off-by: Jiang Yunhong Signed-off-by: Wen Congyang --- xen/arch/x86/domain.c | 57 +++++++++++++++++++++++++++++++++++++++++++ xen/arch/x86/x86_64/entry.S | 4 +++ xen/include/public/xen.h | 1 + 3 files changed, 62 insertions(+), 0 deletions(-) diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c index 874742c..709f77f 100644 --- a/xen/arch/x86/domain.c +++ b/xen/arch/x86/domain.c @@ -1930,6 +1930,63 @@ int domain_relinquish_resources(struct domain *d) return 0; } +int do_reset_vcpu_op(unsigned long domid) +{ + struct vcpu *v; + struct domain *d; + int ret; + + if ( domid == DOMID_SELF ) + /* We can't destroy outself pagetables */ + return -EINVAL; + + if ( (d = rcu_lock_domain_by_id(domid)) == NULL ) + return -EINVAL; + + BUG_ON(!cpumask_empty(d->domain_dirty_cpumask)); + domain_pause(d); + + if ( d->arch.relmem == RELMEM_not_started ) + { + for_each_vcpu ( d, v ) + { + /* Drop the in-use references to page-table bases. */ + ret = vcpu_destroy_pagetables(v); + if ( ret ) + return ret; + + unmap_vcpu_info(v); + v->is_initialised = 0; + } + + if ( !is_hvm_domain(d) ) + { + for_each_vcpu ( d, v ) + { + /* + * Relinquish GDT mappings. No need for explicit unmapping of the + * LDT as it automatically gets squashed with the guest mappings. + */ + destroy_gdt(v); + } + + if ( d->arch.pv_domain.pirq_eoi_map != NULL ) + { + unmap_domain_page_global(d->arch.pv_domain.pirq_eoi_map); + put_page_and_type( + mfn_to_page(d->arch.pv_domain.pirq_eoi_map_mfn)); + d->arch.pv_domain.pirq_eoi_map = NULL; + d->arch.pv_domain.auto_unmask = 0; + } + } + } + + domain_unpause(d); + rcu_unlock_domain(d); + + return 0; +} + void arch_dump_domain_info(struct domain *d) { paging_dump_domain_info(d); diff --git a/xen/arch/x86/x86_64/entry.S b/xen/arch/x86/x86_64/entry.S index 5beeccb..0e4dde4 100644 --- a/xen/arch/x86/x86_64/entry.S +++ b/xen/arch/x86/x86_64/entry.S @@ -762,6 +762,8 @@ ENTRY(hypercall_table) .quad do_domctl .quad do_kexec_op .quad do_tmem_op + .quad do_ni_hypercall /* reserved for XenClient */ + .quad do_reset_vcpu_op /* 40 */ .rept __HYPERVISOR_arch_0-((.-hypercall_table)/8) .quad do_ni_hypercall .endr @@ -810,6 +812,8 @@ ENTRY(hypercall_args_table) .byte 1 /* do_domctl */ .byte 2 /* do_kexec */ .byte 1 /* do_tmem_op */ + .byte 0 /* do_ni_hypercall */ + .byte 1 /* do_reset_vcpu_op */ /* 40 */ .rept __HYPERVISOR_arch_0-(.-hypercall_args_table) .byte 0 /* do_ni_hypercall */ .endr diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h index 3cab74f..696f4a3 100644 --- a/xen/include/public/xen.h +++ b/xen/include/public/xen.h @@ -101,6 +101,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t); #define __HYPERVISOR_kexec_op 37 #define __HYPERVISOR_tmem_op 38 #define __HYPERVISOR_xc_reserved_op 39 /* reserved for XenClient */ +#define __HYPERVISOR_reset_vcpu_op 40 /* Architecture-specific hypercall definitions. */ #define __HYPERVISOR_arch_0 48 -- 1.7.4