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Diffstat (limited to 'arch/x86/xen/smp.c')
-rw-r--r--arch/x86/xen/smp.c49
1 files changed, 33 insertions, 16 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index c36b325abd8..a18eadd8bb4 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -73,9 +73,11 @@ static void cpu_bringup(void)
touch_softlockup_watchdog();
preempt_disable();
- xen_enable_sysenter();
- xen_enable_syscall();
-
+ /* PVH runs in ring 0 and allows us to do native syscalls. Yay! */
+ if (!xen_feature(XENFEAT_supervisor_mode_kernel)) {
+ xen_enable_sysenter();
+ xen_enable_syscall();
+ }
cpu = smp_processor_id();
smp_store_cpu_info(cpu);
cpu_data(cpu).x86_max_cores = 1;
@@ -97,8 +99,14 @@ static void cpu_bringup(void)
wmb(); /* make sure everything is out */
}
-static void cpu_bringup_and_idle(void)
+/* Note: cpu parameter is only relevant for PVH */
+static void cpu_bringup_and_idle(int cpu)
{
+#ifdef CONFIG_X86_64
+ if (xen_feature(XENFEAT_auto_translated_physmap) &&
+ xen_feature(XENFEAT_supervisor_mode_kernel))
+ xen_pvh_secondary_vcpu_init(cpu);
+#endif
cpu_bringup();
cpu_startup_entry(CPUHP_ONLINE);
}
@@ -274,9 +282,10 @@ static void __init xen_smp_prepare_boot_cpu(void)
native_smp_prepare_boot_cpu();
if (xen_pv_domain()) {
- /* We've switched to the "real" per-cpu gdt, so make sure the
- old memory can be recycled */
- make_lowmem_page_readwrite(xen_initial_gdt);
+ if (!xen_feature(XENFEAT_writable_page_tables))
+ /* We've switched to the "real" per-cpu gdt, so make
+ * sure the old memory can be recycled. */
+ make_lowmem_page_readwrite(xen_initial_gdt);
#ifdef CONFIG_X86_32
/*
@@ -360,22 +369,21 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
gdt = get_cpu_gdt_table(cpu);
- ctxt->flags = VGCF_IN_KERNEL;
- ctxt->user_regs.ss = __KERNEL_DS;
#ifdef CONFIG_X86_32
+ /* Note: PVH is not yet supported on x86_32. */
ctxt->user_regs.fs = __KERNEL_PERCPU;
ctxt->user_regs.gs = __KERNEL_STACK_CANARY;
-#else
- ctxt->gs_base_kernel = per_cpu_offset(cpu);
#endif
ctxt->user_regs.eip = (unsigned long)cpu_bringup_and_idle;
memset(&ctxt->fpu_ctxt, 0, sizeof(ctxt->fpu_ctxt));
- {
+ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+ ctxt->flags = VGCF_IN_KERNEL;
ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */
ctxt->user_regs.ds = __USER_DS;
ctxt->user_regs.es = __USER_DS;
+ ctxt->user_regs.ss = __KERNEL_DS;
xen_copy_trap_info(ctxt->trap_ctxt);
@@ -396,18 +404,27 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
#ifdef CONFIG_X86_32
ctxt->event_callback_cs = __KERNEL_CS;
ctxt->failsafe_callback_cs = __KERNEL_CS;
+#else
+ ctxt->gs_base_kernel = per_cpu_offset(cpu);
#endif
ctxt->event_callback_eip =
(unsigned long)xen_hypervisor_callback;
ctxt->failsafe_callback_eip =
(unsigned long)xen_failsafe_callback;
+ ctxt->user_regs.cs = __KERNEL_CS;
+ per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir);
+#ifdef CONFIG_X86_32
}
- ctxt->user_regs.cs = __KERNEL_CS;
+#else
+ } else
+ /* N.B. The user_regs.eip (cpu_bringup_and_idle) is called with
+ * %rdi having the cpu number - which means are passing in
+ * as the first parameter the cpu. Subtle!
+ */
+ ctxt->user_regs.rdi = cpu;
+#endif
ctxt->user_regs.esp = idle->thread.sp0 - sizeof(struct pt_regs);
-
- per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir);
ctxt->ctrlreg[3] = xen_pfn_to_cr3(virt_to_mfn(swapper_pg_dir));
-
if (HYPERVISOR_vcpu_op(VCPUOP_initialise, cpu, ctxt))
BUG();