[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH RFC 4/4] Implement XEN_DOMCTL_gethvmcontext part of arch_do_domctl
Signed-off-by: Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx> --- xen/arch/arm/domctl.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 57 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/domctl.c b/xen/arch/arm/domctl.c index 851ee40..a1ff570 100644 --- a/xen/arch/arm/domctl.c +++ b/xen/arch/arm/domctl.c @@ -9,12 +9,68 @@ #include <xen/lib.h> #include <xen/errno.h> #include <xen/sched.h> +#include <xen/hvm/save.h> +#include <xen/guest_access.h> #include <public/domctl.h> long arch_do_domctl(struct xen_domctl *domctl, struct domain *d, XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl) { - return -ENOSYS; + long ret = 0; + bool_t copyback = 0; + switch ( domctl->cmd ) + { + case XEN_DOMCTL_gethvmcontext: + { + struct hvm_domain_context c = { 0 }; + + ret = -EINVAL; + if ( !is_hvm_domain(d) ) { + printk("Domain is not hvm... Just go on...\n"); + } + + c.size = hvm_save_size(d); + + if ( guest_handle_is_null(domctl->u.hvmcontext.buffer) ) + { + /* Client is querying for the correct buffer size */ + domctl->u.hvmcontext.size = c.size; + ret = 0; + goto gethvmcontext_out; + } + + /* Check that the client has a big enough buffer */ + ret = -ENOSPC; + if ( domctl->u.hvmcontext.size < c.size ) + goto gethvmcontext_out; + + /* Allocate our own marshalling buffer */ + ret = -ENOMEM; + if ( (c.data = xmalloc_bytes(c.size)) == NULL ) + goto gethvmcontext_out; + + domain_pause(d); + ret = hvm_save(d, &c); + domain_unpause(d); + + domctl->u.hvmcontext.size = c.cur; + if ( copy_to_guest(domctl->u.hvmcontext.buffer, c.data, c.size) != 0 ) + ret = -EFAULT; + + gethvmcontext_out: + copyback = 1; + + if ( c.data != NULL ) + xfree(c.data); + } + break; + default: + return -EINVAL; + } + if ( copyback && __copy_to_guest(u_domctl, domctl, 1) ) + ret = -EFAULT; + + return ret; } void arch_get_info_guest(struct vcpu *v, vcpu_guest_context_u c) -- 1.7.9.5 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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