Add a parameter to allow the toolstack to set the x87 FIP width in case the hypervisor's heuristics do the wrong thing.
Signed-off-by: David Vrabel <david.vra...@citrix.com> --- xen/arch/x86/domctl.c | 10 ++++++++++ xen/include/public/domctl.h | 1 + 2 files changed, 11 insertions(+) diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c index 3a3ebbf..f75cd69 100644 --- a/xen/arch/x86/domctl.c +++ b/xen/arch/x86/domctl.c @@ -1415,6 +1415,16 @@ int arch_domctl_param(struct domain *d, uint32_t param, bool_t set, switch ( param ) { + case XEN_DOMCTL_PARAM_ARCH_X86_FIP_WIDTH: + *value = d->arch.x87_fip_width; + if ( set ) + { + if ( new_value != 0 && new_value != 4 && new_value != 8 ) + return -EINVAL; + d->arch.x87_fip_width = new_value; + } + break; + default: return -EINVAL; } diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h index 330b3e7..26d4096 100644 --- a/xen/include/public/domctl.h +++ b/xen/include/public/domctl.h @@ -1100,6 +1100,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_domctl_psr_cat_op_t); * * Not all parameters are valid for all architectures or domain types. */ +#define XEN_DOMCTL_PARAM_ARCH_X86_FIP_WIDTH 0 #define XEN_DOMCTL_PARAM_SET (1u << 31) struct xen_domctl_param { -- 2.1.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel