xen: HVM X2APIC support

[pandora-kernel.git] / arch / x86 / xen / enlighten.c

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 235c0f4..5b8986f 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -75,6 +75,11 @@ DEFINE_PER_CPU(struct vcpu_info, xen_vcpu_info);
 enum xen_domain_type xen_domain_type = XEN_NATIVE;
 EXPORT_SYMBOL_GPL(xen_domain_type);
 
+unsigned long *machine_to_phys_mapping = (void *)MACH2PHYS_VIRT_START;
+EXPORT_SYMBOL(machine_to_phys_mapping);
+unsigned int   machine_to_phys_order;
+EXPORT_SYMBOL(machine_to_phys_order);
+
 struct start_info *xen_start_info;
 EXPORT_SYMBOL_GPL(xen_start_info);
 
@@ -1016,10 +1021,6 @@ static void xen_reboot(int reason)
 {
        struct sched_shutdown r = { .reason = reason };
 
-#ifdef CONFIG_SMP
-       stop_other_cpus();
-#endif
-
        if (HYPERVISOR_sched_op(SCHEDOP_shutdown, &r))
                BUG();
 }
@@ -1090,6 +1091,8 @@ static void __init xen_setup_stackprotector(void)
 /* First C function to be called on Xen boot */
 asmlinkage void __init xen_start_kernel(void)
 {
+       struct physdev_set_iopl set_iopl;
+       int rc;
        pgd_t *pgd;
 
        if (!xen_start_info)
@@ -1097,6 +1100,8 @@ asmlinkage void __init xen_start_kernel(void)
 
        xen_domain_type = XEN_PV_DOMAIN;
 
+       xen_setup_machphys_mapping();
+
        /* Install Xen paravirt ops */
        pv_info = xen_info;
        pv_init_ops = xen_init_ops;
@@ -1191,8 +1196,6 @@ asmlinkage void __init xen_start_kernel(void)
        /* Allocate and initialize top and mid mfn levels for p2m structure */
        xen_build_mfn_list_list();
 
-       init_mm.pgd = pgd;
-
        /* keep using Xen gdt for now; no urgent need to change it */
 
 #ifdef CONFIG_X86_32
@@ -1202,10 +1205,18 @@ asmlinkage void __init xen_start_kernel(void)
 #else
        pv_info.kernel_rpl = 0;
 #endif
-
        /* set the limit of our address space */
        xen_reserve_top();
 
+       /* We used to do this in xen_arch_setup, but that is too late on AMD
+        * were early_cpu_init (run before ->arch_setup()) calls early_amd_init
+        * which pokes 0xcf8 port.
+        */
+       set_iopl.iopl = 1;
+       rc = HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
+       if (rc != 0)
+               xen_raw_printk("physdev_op failed %d\n", rc);
+
 #ifdef CONFIG_X86_32
        /* set up basic CPUID stuff */
        cpu_detect(&new_cpu_data);
@@ -1245,25 +1256,6 @@ asmlinkage void __init xen_start_kernel(void)
 #endif
 }
 
-static uint32_t xen_cpuid_base(void)
-{
-       uint32_t base, eax, ebx, ecx, edx;
-       char signature[13];
-
-       for (base = 0x40000000; base < 0x40010000; base += 0x100) {
-               cpuid(base, &eax, &ebx, &ecx, &edx);
-               *(uint32_t *)(signature + 0) = ebx;
-               *(uint32_t *)(signature + 4) = ecx;
-               *(uint32_t *)(signature + 8) = edx;
-               signature[12] = 0;
-
-               if (!strcmp("XenVMMXenVMM", signature) && ((eax - base) >= 2))
-                       return base;
-       }
-
-       return 0;
-}
-
 static int init_hvm_pv_info(int *major, int *minor)
 {
        uint32_t eax, ebx, ecx, edx, pages, msr, base;
@@ -1373,6 +1365,18 @@ static bool __init xen_hvm_platform(void)
        return true;
 }
 
+bool xen_hvm_need_lapic(void)
+{
+       if (xen_pv_domain())
+               return false;
+       if (!xen_hvm_domain())
+               return false;
+       if (xen_feature(XENFEAT_hvm_pirqs) && xen_have_vector_callback)
+               return false;
+       return true;
+}
+EXPORT_SYMBOL_GPL(xen_hvm_need_lapic);
+
 const __refconst struct hypervisor_x86 x86_hyper_xen_hvm = {
        .name                   = "Xen HVM",
        .detect                 = xen_hvm_platform,