Commit 3f3aaea2 authored by Konrad Rzeszutek Wilk's avatar Konrad Rzeszutek Wilk
Browse files

xen/p2m: Move code around to allow for better re-usage. 



We are going to be using the early_alloc_p2m (and
early_alloc_p2m_middle) code in follow up patches which
are not related to setting identity pages.

Hence lets move the code out in its own function and
rename them as appropiate.

Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent f09d8432

arch/x86/xen/p2m.c

+34 −28
Original line number Diff line number Diff line
@@ -499,7 +499,7 @@ static bool alloc_p2m(unsigned long pfn) 
	return true;

}



static bool __init __early_alloc_p2m(unsigned long pfn)

static bool __init early_alloc_p2m_middle(unsigned long pfn)

{

	unsigned topidx, mididx, idx;
@@ -541,23 +541,8 @@ static bool __init __early_alloc_p2m(unsigned long pfn) 
	}

	return idx != 0;

}

unsigned long __init set_phys_range_identity(unsigned long pfn_s,

				      unsigned long pfn_e)

{

	unsigned long pfn;



	if (unlikely(pfn_s >= MAX_P2M_PFN || pfn_e >= MAX_P2M_PFN))

		return 0;



	if (unlikely(xen_feature(XENFEAT_auto_translated_physmap)))

		return pfn_e - pfn_s;



	if (pfn_s > pfn_e)

		return 0;



	for (pfn = (pfn_s & ~(P2M_MID_PER_PAGE * P2M_PER_PAGE - 1));

		pfn < ALIGN(pfn_e, (P2M_MID_PER_PAGE * P2M_PER_PAGE));

		pfn += P2M_MID_PER_PAGE * P2M_PER_PAGE)

static bool __init early_alloc_p2m(unsigned long pfn)

{

	unsigned topidx = p2m_top_index(pfn);

	unsigned long *mid_mfn_p;
@@ -582,12 +567,33 @@ unsigned long __init set_phys_range_identity(unsigned long pfn_s, 
		p2m_top_mfn_p[topidx] = mid_mfn_p;

		p2m_top_mfn[topidx] = virt_to_mfn(mid_mfn_p);

		/* Note: we don't set mid_mfn_p[midix] here,

		 	 * look in __early_alloc_p2m */

		 * look in early_alloc_p2m_middle */

	}

	return true;

}

unsigned long __init set_phys_range_identity(unsigned long pfn_s,

				      unsigned long pfn_e)

{

	unsigned long pfn;



	if (unlikely(pfn_s >= MAX_P2M_PFN || pfn_e >= MAX_P2M_PFN))

		return 0;



	if (unlikely(xen_feature(XENFEAT_auto_translated_physmap)))

		return pfn_e - pfn_s;



	if (pfn_s > pfn_e)

		return 0;



	for (pfn = (pfn_s & ~(P2M_MID_PER_PAGE * P2M_PER_PAGE - 1));

		pfn < ALIGN(pfn_e, (P2M_MID_PER_PAGE * P2M_PER_PAGE));

		pfn += P2M_MID_PER_PAGE * P2M_PER_PAGE)

	{

		WARN_ON(!early_alloc_p2m(pfn));

	}



	__early_alloc_p2m(pfn_s);

	__early_alloc_p2m(pfn_e);

	early_alloc_p2m_middle(pfn_s);

	early_alloc_p2m_middle(pfn_e);



	for (pfn = pfn_s; pfn < pfn_e; pfn++)

		if (!__set_phys_to_machine(pfn, IDENTITY_FRAME(pfn)))

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