x86/entry/64: Make cpu_entry_area.tss read-only

[thirdparty/kernel/stable.git] / arch / x86 / xen / enlighten_pv.c

diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 69b9deff7e5c84c4133064ada0606eb872908152..ae3a071e1d0f4e5576b1f2184e0255a375676528 100644 (file)
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Core of Xen paravirt_ops implementation.
  *
@@ -600,7 +601,7 @@ static struct trap_array_entry trap_array[] = {
 #ifdef CONFIG_X86_MCE
        { machine_check,               xen_machine_check,               true },
 #endif
-       { nmi,                         xen_nmi,                         true },
+       { nmi,                         xen_xennmi,                      true },
        { overflow,                    xen_overflow,                    false },
 #ifdef CONFIG_IA32_EMULATION
        { entry_INT80_compat,          xen_entry_INT80_compat,          false },
@@ -810,15 +811,14 @@ static void __init xen_write_gdt_entry_boot(struct desc_struct *dt, int entry,
        }
 }
 
-static void xen_load_sp0(struct tss_struct *tss,
-                        struct thread_struct *thread)
+static void xen_load_sp0(unsigned long sp0)
 {
        struct multicall_space mcs;
 
        mcs = xen_mc_entry(0);
-       MULTI_stack_switch(mcs.mc, __KERNEL_DS, thread->sp0);
+       MULTI_stack_switch(mcs.mc, __KERNEL_DS, sp0);
        xen_mc_issue(PARAVIRT_LAZY_CPU);
-       tss->x86_tss.sp0 = thread->sp0;
+       this_cpu_write(cpu_tss_rw.x86_tss.sp0, sp0);
 }
 
 void xen_set_iopl_mask(unsigned mask)
@@ -1459,9 +1459,9 @@ static uint32_t __init xen_platform_pv(void)
        return 0;
 }
 
-const struct hypervisor_x86 x86_hyper_xen_pv = {
+const __initconst struct hypervisor_x86 x86_hyper_xen_pv = {
        .name                   = "Xen PV",
        .detect                 = xen_platform_pv,
-       .pin_vcpu               = xen_pin_vcpu,
+       .type                   = X86_HYPER_XEN_PV,
+       .runtime.pin_vcpu       = xen_pin_vcpu,
 };
-EXPORT_SYMBOL(x86_hyper_xen_pv);