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authorJuergen Gross <jgross@suse.com>2017-08-31 19:42:49 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-08-31 21:35:10 +0200
commit5878d5d6fdef6447d73b0acc121ba445bef37f53 (patch)
treeb4d36a16451274496a02a43adef75a68b84fdf6f /arch/x86/include/asm
parentef1d4deab953ecb1dfcf9f167043bda8b3f14a11 (diff)
x86/xen: Get rid of paravirt op adjust_exception_frame
When running as Xen pv-guest the exception frame on the stack contains %r11 and %rcx additional to the other data pushed by the processor. Instead of having a paravirt op being called for each exception type prepend the Xen specific code to each exception entry. When running as Xen pv-guest just use the exception entry with prepended instructions, otherwise use the entry without the Xen specific code. [ tglx: Merged through tip to avoid ugly merge conflict ] Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: xen-devel@lists.xenproject.org Cc: boris.ostrovsky@oracle.com Cc: luto@amacapital.net Link: http://lkml.kernel.org/r/20170831174249.26853-1-jg@pfupf.net
Diffstat (limited to 'arch/x86/include/asm')
-rw-r--r--arch/x86/include/asm/paravirt.h5
-rw-r--r--arch/x86/include/asm/paravirt_types.h3
-rw-r--r--arch/x86/include/asm/proto.h3
-rw-r--r--arch/x86/include/asm/traps.h28
4 files changed, 28 insertions, 11 deletions
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 9ccac1926587..c25dd22f7c70 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -960,11 +960,6 @@ extern void default_banner(void);
#define GET_CR2_INTO_RAX \
call PARA_INDIRECT(pv_mmu_ops+PV_MMU_read_cr2)
-#define PARAVIRT_ADJUST_EXCEPTION_FRAME \
- PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_adjust_exception_frame), \
- CLBR_NONE, \
- call PARA_INDIRECT(pv_irq_ops+PV_IRQ_adjust_exception_frame))
-
#define USERGS_SYSRET64 \
PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_usergs_sysret64), \
CLBR_NONE, \
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 9ffc36bfe4cd..6b64fc6367f2 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -196,9 +196,6 @@ struct pv_irq_ops {
void (*safe_halt)(void);
void (*halt)(void);
-#ifdef CONFIG_X86_64
- void (*adjust_exception_frame)(void);
-#endif
} __no_randomize_layout;
struct pv_mmu_ops {
diff --git a/arch/x86/include/asm/proto.h b/arch/x86/include/asm/proto.h
index 8d3964fc5f91..b408b1886195 100644
--- a/arch/x86/include/asm/proto.h
+++ b/arch/x86/include/asm/proto.h
@@ -24,6 +24,9 @@ void entry_SYSENTER_compat(void);
void __end_entry_SYSENTER_compat(void);
void entry_SYSCALL_compat(void);
void entry_INT80_compat(void);
+#if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
+void xen_entry_INT80_compat(void);
+#endif
#endif
void x86_configure_nx(void);
diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
index cd0365ed0f68..5545f6459bf5 100644
--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -13,9 +13,6 @@ asmlinkage void divide_error(void);
asmlinkage void debug(void);
asmlinkage void nmi(void);
asmlinkage void int3(void);
-asmlinkage void xen_debug(void);
-asmlinkage void xen_int3(void);
-asmlinkage void xen_stack_segment(void);
asmlinkage void overflow(void);
asmlinkage void bounds(void);
asmlinkage void invalid_op(void);
@@ -38,6 +35,31 @@ asmlinkage void machine_check(void);
#endif /* CONFIG_X86_MCE */
asmlinkage void simd_coprocessor_error(void);
+#if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
+asmlinkage void xen_divide_error(void);
+asmlinkage void xen_xendebug(void);
+asmlinkage void xen_xenint3(void);
+asmlinkage void xen_nmi(void);
+asmlinkage void xen_overflow(void);
+asmlinkage void xen_bounds(void);
+asmlinkage void xen_invalid_op(void);
+asmlinkage void xen_device_not_available(void);
+asmlinkage void xen_double_fault(void);
+asmlinkage void xen_coprocessor_segment_overrun(void);
+asmlinkage void xen_invalid_TSS(void);
+asmlinkage void xen_segment_not_present(void);
+asmlinkage void xen_stack_segment(void);
+asmlinkage void xen_general_protection(void);
+asmlinkage void xen_page_fault(void);
+asmlinkage void xen_spurious_interrupt_bug(void);
+asmlinkage void xen_coprocessor_error(void);
+asmlinkage void xen_alignment_check(void);
+#ifdef CONFIG_X86_MCE
+asmlinkage void xen_machine_check(void);
+#endif /* CONFIG_X86_MCE */
+asmlinkage void xen_simd_coprocessor_error(void);
+#endif
+
dotraplinkage void do_divide_error(struct pt_regs *, long);
dotraplinkage void do_debug(struct pt_regs *, long);
dotraplinkage void do_nmi(struct pt_regs *, long);

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