[Xen-devel] [PATCH 07/10] x86/paravirt: move items in pv_info under PARAVIRT_XXL umbrella

[Juergen Gross <jgross@xxxxxxxx>]

All items but name in pv_info are needed by Xen PV only. Define them
with CONFIG_PARAVIRT_XXL set only.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
 arch/x86/include/asm/paravirt.h             | 2 ++
 arch/x86/include/asm/paravirt_types.h       | 2 ++
 arch/x86/include/asm/pgtable-3level_types.h | 2 +-
 arch/x86/include/asm/ptrace.h               | 3 ++-
 arch/x86/include/asm/segment.h              | 2 +-
 arch/x86/kernel/paravirt.c                  | 2 ++
 6 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 436d270e622b..afc0469979f7 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -104,7 +104,9 @@ static inline void wbinvd(void)
        PVOP_VCALL0(pv_cpu_ops.wbinvd);
 }
 
+#ifdef CONFIG_PARAVIRT_XXL
 #define get_kernel_rpl()  (pv_info.kernel_rpl)
+#endif
 
 static inline u64 paravirt_read_msr(unsigned msr)
 {
diff --git a/arch/x86/include/asm/paravirt_types.h 
b/arch/x86/include/asm/paravirt_types.h
index ed024e90b863..f1bdc4c9ff4c 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -65,12 +65,14 @@ struct paravirt_callee_save {
 
 /* general info */
 struct pv_info {
+#ifdef CONFIG_PARAVIRT_XXL
        unsigned int kernel_rpl;
        int shared_kernel_pmd;
 
 #ifdef CONFIG_X86_64
        u16 extra_user_64bit_cs;  /* __USER_CS if none */
 #endif
+#endif
 
        const char *name;
 };
diff --git a/arch/x86/include/asm/pgtable-3level_types.h 
b/arch/x86/include/asm/pgtable-3level_types.h
index 6a59a6d0cc50..1aa68ca1907c 100644
--- a/arch/x86/include/asm/pgtable-3level_types.h
+++ b/arch/x86/include/asm/pgtable-3level_types.h
@@ -20,7 +20,7 @@ typedef union {
 } pte_t;
 #endif /* !__ASSEMBLY__ */
 
-#ifdef CONFIG_PARAVIRT
+#ifdef CONFIG_PARAVIRT_XXL
 #define SHARED_KERNEL_PMD      (pv_info.shared_kernel_pmd)
 #else
 #define SHARED_KERNEL_PMD      1
diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h
index 6de1fd3d0097..c9ac6ff5f7d2 100644
--- a/arch/x86/include/asm/ptrace.h
+++ b/arch/x86/include/asm/ptrace.h
@@ -144,7 +144,8 @@ static inline int v8086_mode(struct pt_regs *regs)
 static inline bool user_64bit_mode(struct pt_regs *regs)
 {
 #ifdef CONFIG_X86_64
-#ifndef CONFIG_PARAVIRT
+/* Early boot code has CONFIG_PARAVIRT undefined! */
+#if !defined(CONFIG_PARAVIRT) || !defined(CONFIG_PARAVIRT_XXL)
        /*
         * On non-paravirt systems, this is the only long mode CPL 3
         * selector.  We do not allow long mode selectors in the LDT.
diff --git a/arch/x86/include/asm/segment.h b/arch/x86/include/asm/segment.h
index e293c122d0d5..0ffbe9519e68 100644
--- a/arch/x86/include/asm/segment.h
+++ b/arch/x86/include/asm/segment.h
@@ -211,7 +211,7 @@
 
 #endif
 
-#ifndef CONFIG_PARAVIRT
+#ifndef CONFIG_PARAVIRT_XXL
 # define get_kernel_rpl()              0
 #endif
 
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 40ec68135f7a..168901f4dc09 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -292,12 +292,14 @@ enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
 
 struct pv_info pv_info = {
        .name = "bare hardware",
+#ifdef CONFIG_PARAVIRT_XXL
        .kernel_rpl = 0,
        .shared_kernel_pmd = 1, /* Only used when CONFIG_X86_PAE is set */
 
 #ifdef CONFIG_X86_64
        .extra_user_64bit_cs = __USER_CS,
 #endif
+#endif
 };
 
 #if defined(CONFIG_X86_32) && !defined(CONFIG_X86_PAE)
-- 
2.13.7


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