Xen is requiring 64-bit machines today. There is no need to carry the
burden of 32-bit PV guest support in the kernel any longer, as new
guests can be either HVM or PVH, or they can use a 64 bit kernel.
Remove the 32-bit Xen PV support from the kernel.
Signed-off-by: Juergen Gross
---
arch/x86/entry/entry_32.S | 93
arch/x86/include/asm/proto.h | 2 +-
arch/x86/include/asm/segment.h | 2 +-
arch/x86/include/asm/traps.h | 2 +-
arch/x86/xen/Kconfig | 3 +-
arch/x86/xen/Makefile | 4 +-
arch/x86/xen/apic.c| 17 ---
arch/x86/xen/enlighten_pv.c| 45 +-
arch/x86/xen/mmu_pv.c | 326 -
arch/x86/xen/p2m.c | 4 -
arch/x86/xen/setup.c | 44 +-
arch/x86/xen/smp_pv.c | 19 +--
arch/x86/xen/xen-asm.S | 14 --
arch/x86/xen/xen-asm_32.S | 207 --
arch/x86/xen/xen-head.S| 6 -
arch/x86/xen/xen-ops.h | 5 -
drivers/xen/Kconfig| 4 +-
17 files changed, 42 insertions(+), 755 deletions(-)
delete mode 100644 arch/x86/xen/xen-asm_32.S
diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index 7b23431be5cb..d4464af28212 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -787,16 +787,6 @@ GLOBAL(__begin_SYSENTER_singlestep_region)
* will ignore all of the single-step traps generated in this range.
*/
-#ifdef CONFIG_XEN_PV
-/*
- * Xen doesn't set %esp to be precisely what the normal SYSENTER
- * entry point expects, so fix it up before using the normal path.
- */
-ENTRY(xen_sysenter_target)
- addl$5*4, %esp /* remove xen-provided frame */
- jmp .Lsysenter_past_esp
-#endif
-
/*
* 32-bit SYSENTER entry.
*
@@ -1249,89 +1239,6 @@ ENTRY(spurious_interrupt_bug)
jmp common_exception
END(spurious_interrupt_bug)
-#ifdef CONFIG_XEN_PV
-ENTRY(xen_hypervisor_callback)
- pushl $-1 /* orig_ax = -1 => not a system
call */
- SAVE_ALL
- ENCODE_FRAME_POINTER
- TRACE_IRQS_OFF
-
- /*
-* Check to see if we got the event in the critical
-* region in xen_iret_direct, after we've reenabled
-* events and checked for pending events. This simulates
-* iret instruction's behaviour where it delivers a
-* pending interrupt when enabling interrupts:
-*/
- movlPT_EIP(%esp), %eax
- cmpl$xen_iret_start_crit, %eax
- jb 1f
- cmpl$xen_iret_end_crit, %eax
- jae 1f
-
- jmp xen_iret_crit_fixup
-
-ENTRY(xen_do_upcall)
-1: mov %esp, %eax
- callxen_evtchn_do_upcall
-#ifndef CONFIG_PREEMPT
- callxen_maybe_preempt_hcall
-#endif
- jmp ret_from_intr
-ENDPROC(xen_hypervisor_callback)
-
-/*
- * Hypervisor uses this for application faults while it executes.
- * We get here for two reasons:
- * 1. Fault while reloading DS, ES, FS or GS
- * 2. Fault while executing IRET
- * Category 1 we fix up by reattempting the load, and zeroing the segment
- * register if the load fails.
- * Category 2 we fix up by jumping to do_iret_error. We cannot use the
- * normal Linux return path in this case because if we use the IRET hypercall
- * to pop the stack frame we end up in an infinite loop of failsafe callbacks.
- * We distinguish between categories by maintaining a status value in EAX.
- */
-ENTRY(xen_failsafe_callback)
- pushl %eax
- movl$1, %eax
-1: mov 4(%esp), %ds
-2: mov 8(%esp), %es
-3: mov 12(%esp), %fs
-4: mov 16(%esp), %gs
- /* EAX == 0 => Category 1 (Bad segment)
- EAX != 0 => Category 2 (Bad IRET) */
- testl %eax, %eax
- popl%eax
- lea 16(%esp), %esp
- jz 5f
- jmp iret_exc
-5: pushl $-1 /* orig_ax = -1 => not a system
call */
- SAVE_ALL
- ENCODE_FRAME_POINTER
- jmp ret_from_exception
-
-.section .fixup, "ax"
-6: xorl%eax, %eax
- movl%eax, 4(%esp)
- jmp 1b
-7: xorl%eax, %eax
- movl%eax, 8(%esp)
- jmp 2b
-8: xorl%eax, %eax
- movl%eax, 12(%esp)
- jmp 3b
-9: xorl%eax, %eax
- movl%eax, 16(%esp)
- jmp 4b
-.previous
- _ASM_EXTABLE(1b, 6b)
- _ASM_EXTABLE(2b, 7b)
- _ASM_EXTABLE(3b, 8b)
- _ASM_EXTABLE(4b, 9b)
-ENDPROC(xen_failsafe_callback)
-#endif /* CONFIG_XEN_PV */
-
#ifdef CONFIG_XEN_PVHVM
BUILD_INTERRUPT3(xen_hvm_callback_vector, HYPERVISOR_CALLBACK_VECTOR,
xen_evtchn_do_upcall)
diff --git a/arch/x86/include/asm/proto.h b/arch/x86/include/asm/proto.h
index 6e81788a30c1..e5a13a138b01 100644
--- a/arch/x86/include/asm/proto.h
+++ b/arch/x86/include/asm/proto.h
@@ -25,7 +25,7 @@ void entry_SYSENTER_compat(void);
void
