/*
* Allocate and fill in the hypcall page.
*/
static int
xen_hvm_init_hypercall_stubs(enum xen_hvm_init_type init_type)
{
uint32_t base, regs[4];
int i;
if (xen_pv_domain()) {
/* hypercall page is already set in the PV case */
return (0);
}
base = xen_hvm_cpuid_base();
if (base == 0)
return (ENXIO);
if (init_type == XEN_HVM_INIT_COLD) {
int major, minor;
do_cpuid(base + 1, regs);
major = regs[0] >> 16;
minor = regs[0] & 0xffff;
printf("XEN: Hypervisor version %d.%d detected.\n", major,
minor);
#ifdef SMP
if (((major < 4) || (major == 4 && minor <= 5)) &&
msix_disable_migration == -1) {
/*
* Xen hypervisors prior to 4.6.0 do not properly
* handle updates to enabled MSI-X table entries,
* so disable MSI-X interrupt migration in that
* case.
*/
if (bootverbose)
printf(
"Disabling MSI-X interrupt migration due to Xen hypervisor bug.\n"
"Set machdep.msix_disable_migration=0 to forcefully enable it.\n");
msix_disable_migration = 1;
}
#endif
}
/*
* Allocate and fill in the hypcall page.
*/
static int
xen_hvm_init_hypercall_stubs(enum xen_hvm_init_type init_type)
{
uint32_t base, regs[4];
int i;
if (xen_pv_domain()) {
/* hypercall page is already set in the PV case */
return (0);
}
base = xen_hvm_cpuid_base();
if (base == 0)
return (ENXIO);
if (init_type == XEN_HVM_INIT_COLD) {
do_cpuid(base + 1, regs);
printf("XEN: Hypervisor version %d.%d detected.\n",
regs[0] >> 16, regs[0] & 0xffff);
}
/*
* Allocate and fill in the hypcall page.
*/
int
xen_hvm_init_hypercall_stubs(enum xen_hvm_init_type init_type)
{
uint32_t regs[4];
/* Legacy PVH will get here without the cpuid leaf being set. */
if (cpuid_base == 0)
cpuid_base = xen_hvm_cpuid_base();
if (cpuid_base == 0)
return (ENXIO);
if (xen_domain() && init_type == XEN_HVM_INIT_LATE) {
/*
* If the domain type is already set we can assume that the
* hypercall page has been populated too, so just print the
* version (and apply any quirks) and exit.
*/
hypervisor_version();
return 0;
}
if (init_type == XEN_HVM_INIT_LATE)
hypervisor_version();
/*
* Find the hypercall pages.
*/
do_cpuid(cpuid_base + 2, regs);
if (regs[0] != 1)
return (EINVAL);
wrmsr(regs[1], (init_type == XEN_HVM_INIT_EARLY)
? ((vm_paddr_t)&hypercall_page - KERNBASE)
: vtophys(&hypercall_page));
return (0);
}
