[PATCH v2 07/11] x86/paravirt: move items in pv_info under PARAVIRT_XXL umbrella

Juergen Gross
2018-08-13T07:37:35Z

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@suse.com>
---
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 be5b610d255e..4f27e33245c9 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(cpu.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 b2b4bb4fff58..c7b73953cea5 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 ef8dcc8a8932..7604d223bd03 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