diff options
Diffstat (limited to 'arch/x86/xen/enlighten.c')
| -rw-r--r-- | arch/x86/xen/enlighten.c | 47 |
1 files changed, 26 insertions, 21 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 8b9ee27805fd..de4e6f05840b 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -95,7 +95,7 @@ struct shared_info *HYPERVISOR_shared_info = (void *)&dummy_shared_info; * * 0: not available, 1: available */ -static int have_vcpu_info_placement = 0; +static int have_vcpu_info_placement = 1; static void __init xen_vcpu_setup(int cpu) { @@ -103,6 +103,7 @@ static void __init xen_vcpu_setup(int cpu) int err; struct vcpu_info *vcpup; + BUG_ON(HYPERVISOR_shared_info == &dummy_shared_info); per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu]; if (!have_vcpu_info_placement) @@ -805,33 +806,43 @@ static __init void xen_pagetable_setup_start(pgd_t *base) PFN_DOWN(__pa(xen_start_info->pt_base))); } -static __init void xen_pagetable_setup_done(pgd_t *base) +static __init void setup_shared_info(void) { - /* This will work as long as patching hasn't happened yet - (which it hasn't) */ - pv_mmu_ops.alloc_pt = xen_alloc_pt; - pv_mmu_ops.alloc_pd = xen_alloc_pd; - pv_mmu_ops.release_pt = xen_release_pt; - pv_mmu_ops.release_pd = xen_release_pt; - pv_mmu_ops.set_pte = xen_set_pte; - if (!xen_feature(XENFEAT_auto_translated_physmap)) { + unsigned long addr = fix_to_virt(FIX_PARAVIRT_BOOTMAP); + /* * Create a mapping for the shared info page. * Should be set_fixmap(), but shared_info is a machine * address with no corresponding pseudo-phys address. */ - set_pte_mfn(fix_to_virt(FIX_PARAVIRT_BOOTMAP), + set_pte_mfn(addr, PFN_DOWN(xen_start_info->shared_info), PAGE_KERNEL); - HYPERVISOR_shared_info = - (struct shared_info *)fix_to_virt(FIX_PARAVIRT_BOOTMAP); - + HYPERVISOR_shared_info = (struct shared_info *)addr; } else HYPERVISOR_shared_info = (struct shared_info *)__va(xen_start_info->shared_info); +#ifndef CONFIG_SMP + /* In UP this is as good a place as any to set up shared info */ + xen_setup_vcpu_info_placement(); +#endif +} + +static __init void xen_pagetable_setup_done(pgd_t *base) +{ + /* This will work as long as patching hasn't happened yet + (which it hasn't) */ + pv_mmu_ops.alloc_pt = xen_alloc_pt; + pv_mmu_ops.alloc_pd = xen_alloc_pd; + pv_mmu_ops.release_pt = xen_release_pt; + pv_mmu_ops.release_pd = xen_release_pt; + pv_mmu_ops.set_pte = xen_set_pte; + + setup_shared_info(); + /* Actually pin the pagetable down, but we can't set PG_pinned yet because the page structures don't exist yet. */ { @@ -1182,15 +1193,9 @@ asmlinkage void __init xen_start_kernel(void) x86_write_percpu(xen_cr3, __pa(pgd)); x86_write_percpu(xen_current_cr3, __pa(pgd)); -#ifdef CONFIG_SMP /* Don't do the full vcpu_info placement stuff until we have a - possible map. */ + possible map and a non-dummy shared_info. */ per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0]; -#else - /* May as well do it now, since there's no good time to call - it later on UP. */ - xen_setup_vcpu_info_placement(); -#endif pv_info.kernel_rpl = 1; if (xen_feature(XENFEAT_supervisor_mode_kernel)) |