Disable (<i486)-only WP workaround on Xen & PAE

i386 didn't support PAE anyway.

* i386/i386/locore.S (copyout_retry) [MACH_HYP || PAE]: Remove.
* xen/xen.c (hyp_invalidate_pte): Remove function.
* xen/xen.h (hyp_invalidate_pte): Remove prototype.

3 files changed, 2 insertions, 44 deletions

diff --git a/i386/i386/locore.S b/i386/i386/locore.S
index 379b219..77ca05b 100644
--- a/i386/i386/locore.S
+++ b/i386/i386/locore.S
@@ -1294,42 +1294,15 @@ Entry(copyoutmsg)
  * XXX only have to do this on 386's.
  */
 copyout_retry:
-#ifdef	MACH_HYP
-	movl	cr3,%ecx		/* point to page directory */
-#else	/* MACH_HYP */
+#if !defined(MACH_HYP) && !PAE
 	movl	%cr3,%ecx		/* point to page directory */
-#endif	/* MACH_HYP */
-#if PAE
-	movl	%edi,%eax		/* get page directory pointer bits */
-	shrl	$(PDPSHIFT),%eax	/* from user address */
-	movl	KERNELBASE(%ecx,%eax,PTE_SIZE),%ecx
-					/* get page directory pointer */
-#ifdef	MACH_PSEUDO_PHYS
-	shrl	$(PTESHIFT),%ecx
-	movl	pfn_list,%eax
-	movl	(%eax,%ecx,4),%ecx	/* mfn_to_pfn */
-	shll	$(PTESHIFT),%ecx
-#else	/* MACH_PSEUDO_PHYS */
-	andl	$(PTE_PFN),%ecx		/* isolate page frame address */
-#endif	/* MACH_PSEUDO_PHYS */
-#endif	/* PAE */
 	movl	%edi,%eax		/* get page directory bits */
 	shrl	$(PDESHIFT),%eax	/* from user address */
-#if PAE
-	andl	$(PDEMASK),%eax
-#endif	/* PAE */
 	movl	KERNELBASE(%ecx,%eax,PTE_SIZE),%ecx
 					/* get page directory pointer */
 	testl	$(PTE_V),%ecx		/* present? */
 	jz	0f			/* if not, fault is OK */
-#ifdef	MACH_PSEUDO_PHYS
-	shrl	$(PTESHIFT),%ecx
-	movl	pfn_list,%eax
-	movl	(%eax,%ecx,4),%ecx	/* mfn_to_pfn */
-	shll	$(PTESHIFT),%ecx
-#else	/* MACH_PSEUDO_PHYS */
 	andl	$(PTE_PFN),%ecx		/* isolate page frame address */
-#endif	/* MACH_PSEUDO_PHYS */
 	movl	%edi,%eax		/* get page table bits */
 	shrl	$(PTESHIFT),%eax
 	andl	$(PTEMASK),%eax		/* from user address */
@@ -1343,18 +1316,11 @@ copyout_retry:
 /*
  * Not writable - must fake a fault.  Turn off access to the page.
  */
-#ifdef	MACH_HYP
-	pushl	%edx
-	pushl	%ecx
-	call	hyp_invalidate_pte
-	popl	%ecx
-	popl	%edx
-#else	/* MACH_HYP */
 	andl	$(PTE_INVALID),(%ecx)	/* turn off valid bit */
 	movl	%cr3,%eax		/* invalidate TLB */
 	movl	%eax,%cr3
-#endif	/* MACH_HYP */
 0:
+#endif /* !defined(MACH_HYP) && !PAE */
 
 /*
  * Copy only what fits on the current destination page.
diff --git a/xen/xen.c b/xen/xen.c
index f8f964e..c3c533c 100644
--- a/xen/xen.c
+++ b/xen/xen.c
@@ -30,13 +30,6 @@
 #include "xen.h"
 #include "evt.h"
 
-void hyp_invalidate_pte(pt_entry_t *pte)
-{
-	if (!hyp_mmu_update_pte(kv_to_ma(pte), (*pte) & ~INTEL_PTE_VALID))
-		panic("%s:%d could not set pte %p(%p) to %p(%p)\n",__FILE__,__LINE__,pte,(vm_offset_t) kv_to_ma(pte),*pte,ma_to_pa(*pte));
-	hyp_mmuext_op_void(MMUEXT_TLB_FLUSH_LOCAL);
-}
-
 void hyp_debug()
 {
 	panic("debug");
diff --git a/xen/xen.h b/xen/xen.h
index 6eeb350..2f4d6bd 100644
--- a/xen/xen.h
+++ b/xen/xen.h
@@ -21,7 +21,6 @@
 
 void hyp_init(void);
 void hyp_dev_init(void);
-void hyp_invalidate_pte(pt_entry_t *pte);
 void hyp_idle(void);
 void hyp_p2m_init(void);