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140 lines
3.6 KiB
140 lines
3.6 KiB
From: Alexander Graf <agraf@suse.de>
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Date: Wed, 18 Nov 2009 00:39:12 +0100
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Subject: Only export selected pv-ops feature structs
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References: bnc#556135, FATE#306453
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Patch-Mainline: Submitted to virtualization list
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To really check for sure that we're not using any pv-ops code by accident,
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we should make sure that we don't even export the structures used to access
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pv-ops exported functions.
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So let's surround the pv-ops structs by #ifdefs.
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Signed-off-by: Alexander Graf <agraf@suse.de>
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---
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arch/x86/kernel/paravirt.c | 35 +++++++++++++++++++++++++++++------
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1 file changed, 29 insertions(+), 6 deletions(-)
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--- a/arch/x86/kernel/paravirt.c
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+++ b/arch/x86/kernel/paravirt.c
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@@ -124,11 +124,21 @@ static void *get_call_destination(u8 typ
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{
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struct paravirt_patch_template tmpl = {
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.pv_init_ops = pv_init_ops,
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+#ifdef CONFIG_PARAVIRT_TIME
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.pv_time_ops = pv_time_ops,
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+#endif
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+#ifdef CONFIG_PARAVIRT_CPU
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.pv_cpu_ops = pv_cpu_ops,
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+#endif
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+#ifdef CONFIG_PARAVIRT_IRQ
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.pv_irq_ops = pv_irq_ops,
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+#endif
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+#ifdef CONFIG_PARAVIRT_APIC
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.pv_apic_ops = pv_apic_ops,
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+#endif
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+#ifdef CONFIG_PARAVIRT_MMU
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.pv_mmu_ops = pv_mmu_ops,
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+#endif
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#ifdef CONFIG_PARAVIRT_SPINLOCKS
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.pv_lock_ops = pv_lock_ops,
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#endif
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@@ -185,6 +195,7 @@ unsigned paravirt_patch_insns(void *insn
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return insn_len;
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}
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+#ifdef CONFIG_PARAVIRT_MMU
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static void native_flush_tlb(void)
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{
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__native_flush_tlb();
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@@ -203,6 +214,7 @@ static void native_flush_tlb_single(unsi
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{
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__native_flush_tlb_single(addr);
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}
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+#endif /* CONFIG_PARAVIRT_MMU */
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/* These are in entry.S */
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extern void native_iret(void);
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@@ -284,6 +296,7 @@ enum paravirt_lazy_mode paravirt_get_laz
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return percpu_read(paravirt_lazy_mode);
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}
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+#ifdef CONFIG_PARAVIRT_MMU
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void arch_flush_lazy_mmu_mode(void)
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{
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preempt_disable();
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@@ -295,6 +308,7 @@ void arch_flush_lazy_mmu_mode(void)
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preempt_enable();
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}
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+#endif /* CONFIG_PARAVIRT_MMU */
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struct pv_info pv_info = {
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.name = "bare hardware",
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@@ -306,11 +320,16 @@ struct pv_info pv_info = {
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struct pv_init_ops pv_init_ops = {
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.patch = native_patch,
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};
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+EXPORT_SYMBOL_GPL(pv_info);
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+#ifdef CONFIG_PARAVIRT_TIME
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struct pv_time_ops pv_time_ops = {
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.sched_clock = native_sched_clock,
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};
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+EXPORT_SYMBOL_GPL(pv_time_ops);
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+#endif
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+#ifdef CONFIG_PARAVIRT_IRQ
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struct pv_irq_ops pv_irq_ops = {
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.save_fl = __PV_IS_CALLEE_SAVE(native_save_fl),
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.restore_fl = __PV_IS_CALLEE_SAVE(native_restore_fl),
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@@ -322,7 +341,10 @@ struct pv_irq_ops pv_irq_ops = {
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.adjust_exception_frame = paravirt_nop,
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#endif
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};
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+EXPORT_SYMBOL (pv_irq_ops);
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+#endif
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+#ifdef CONFIG_PARAVIRT_CPU
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struct pv_cpu_ops pv_cpu_ops = {
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.cpuid = native_cpuid,
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.get_debugreg = native_get_debugreg,
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@@ -383,12 +405,17 @@ struct pv_cpu_ops pv_cpu_ops = {
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.start_context_switch = paravirt_nop,
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.end_context_switch = paravirt_nop,
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};
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+EXPORT_SYMBOL (pv_cpu_ops);
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+#endif
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+#ifdef CONFIG_PARAVIRT_APIC
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struct pv_apic_ops pv_apic_ops = {
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#ifdef CONFIG_X86_LOCAL_APIC
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.startup_ipi_hook = paravirt_nop,
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#endif
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};
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+EXPORT_SYMBOL_GPL(pv_apic_ops);
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+#endif
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#if defined(CONFIG_X86_32) && !defined(CONFIG_X86_PAE)
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/* 32-bit pagetable entries */
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@@ -398,6 +425,7 @@ struct pv_apic_ops pv_apic_ops = {
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#define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_64)
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#endif
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+#ifdef CONFIG_PARAVIRT_MMU
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struct pv_mmu_ops pv_mmu_ops = {
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.read_cr2 = native_read_cr2,
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@@ -466,10 +494,5 @@ struct pv_mmu_ops pv_mmu_ops = {
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.set_fixmap = native_set_fixmap,
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};
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-
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-EXPORT_SYMBOL_GPL(pv_time_ops);
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-EXPORT_SYMBOL (pv_cpu_ops);
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EXPORT_SYMBOL (pv_mmu_ops);
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-EXPORT_SYMBOL_GPL(pv_apic_ops);
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-EXPORT_SYMBOL_GPL(pv_info);
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-EXPORT_SYMBOL (pv_irq_ops);
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+#endif
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