[RFC][PATCH 1/6] x86/power: De-paravirt restore_processor_state()

[Peter Zijlstra]

Since Xen PV doesn't use restore_processor_state(), and we're going to
have to avoid CALL/RET until at least GS is restored, de-paravirt the
easy bits.

Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
---
 arch/x86/power/cpu.c |   24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

--- a/arch/x86/power/cpu.c
+++ b/arch/x86/power/cpu.c
@@ -197,25 +197,25 @@ static void notrace __restore_processor_
        struct cpuinfo_x86 *c;
 
        if (ctxt->misc_enable_saved)
-               wrmsrl(MSR_IA32_MISC_ENABLE, ctxt->misc_enable);
+               native_wrmsrl(MSR_IA32_MISC_ENABLE, ctxt->misc_enable);
        /*
         * control registers
         */
        /* cr4 was introduced in the Pentium CPU */
 #ifdef CONFIG_X86_32
        if (ctxt->cr4)
-               __write_cr4(ctxt->cr4);
+               native_write_cr4(ctxt->cr4);
 #else
 /* CONFIG X86_64 */
-       wrmsrl(MSR_EFER, ctxt->efer);
-       __write_cr4(ctxt->cr4);
+       native_wrmsrl(MSR_EFER, ctxt->efer);
+       native_write_cr4(ctxt->cr4);
 #endif
-       write_cr3(ctxt->cr3);
-       write_cr2(ctxt->cr2);
-       write_cr0(ctxt->cr0);
+       native_write_cr3(ctxt->cr3);
+       native_write_cr2(ctxt->cr2);
+       native_write_cr0(ctxt->cr0);
 
        /* Restore the IDT. */
-       load_idt(&ctxt->idt);
+       native_load_idt(&ctxt->idt);
 
        /*
         * Just in case the asm code got us here with the SS, DS, or ES
@@ -230,7 +230,7 @@ static void notrace __restore_processor_
         * handlers or in complicated helpers like load_gs_index().
         */
 #ifdef CONFIG_X86_64
-       wrmsrl(MSR_GS_BASE, ctxt->kernelmode_gs_base);
+       native_wrmsrl(MSR_GS_BASE, ctxt->kernelmode_gs_base);
 #else
        loadsegment(fs, __KERNEL_PERCPU);
 #endif
@@ -246,15 +246,15 @@ static void notrace __restore_processor_
        loadsegment(ds, ctxt->es);
        loadsegment(es, ctxt->es);
        loadsegment(fs, ctxt->fs);
-       load_gs_index(ctxt->gs);
+       native_load_gs_index(ctxt->gs);
 
        /*
         * Restore FSBASE and GSBASE after restoring the selectors, since
         * restoring the selectors clobbers the bases.  Keep in mind
         * that MSR_KERNEL_GS_BASE is horribly misnamed.
         */
-       wrmsrl(MSR_FS_BASE, ctxt->fs_base);
-       wrmsrl(MSR_KERNEL_GS_BASE, ctxt->usermode_gs_base);
+       native_wrmsrl(MSR_FS_BASE, ctxt->fs_base);
+       native_wrmsrl(MSR_KERNEL_GS_BASE, ctxt->usermode_gs_base);
 #else
        loadsegment(gs, ctxt->gs);
 #endif