Commit b71c9e2f authored by Alexander Graf's avatar Alexander Graf
Browse files

KVM: PPC: E500: Split host and guest MMU parts 



This patch splits the file e500_tlb.c into e500_mmu.c (guest TLB handling)
and e500_mmu_host.c (host TLB handling).

The main benefit of this split is readability and maintainability. It's
just a lot harder to write dirty code :).

Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 9d98b3ff

arch/powerpc/kvm/Makefile

+6 −3
Original line number Diff line number Diff line
@@ -10,7 +10,8 @@ common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o \ 
						eventfd.o)



CFLAGS_44x_tlb.o  := -I.

CFLAGS_e500_tlb.o := -I.

CFLAGS_e500_mmu.o := -I.

CFLAGS_e500_mmu_host.o := -I.

CFLAGS_emulate.o  := -I.



common-objs-y += powerpc.o emulate.o
@@ -35,7 +36,8 @@ kvm-e500-objs := \ 
	booke_emulate.o \

	booke_interrupts.o \

	e500.o \

	e500_tlb.o \

	e500_mmu.o \

	e500_mmu_host.o \

	e500_emulate.o

kvm-objs-$(CONFIG_KVM_E500V2) := $(kvm-e500-objs)
@@ -45,7 +47,8 @@ kvm-e500mc-objs := \ 
	booke_emulate.o \

	bookehv_interrupts.o \

	e500mc.o \

	e500_tlb.o \

	e500_mmu.o \

	e500_mmu_host.o \

	e500_emulate.o

kvm-objs-$(CONFIG_KVM_E500MC) := $(kvm-e500mc-objs)

arch/powerpc/kvm/e500_tlb.c→arch/powerpc/kvm/e500_mmu.c

+6 −621
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.

 * Copyright (C) 2008-2013 Freescale Semiconductor, Inc. All rights reserved.

 *

 * Author: Yu Liu, yu.liu@freescale.com

 *         Scott Wood, scottwood@freescale.com

 *         Ashish Kalra, ashish.kalra@freescale.com

 *         Varun Sethi, varun.sethi@freescale.com

 *         Alexander Graf, agraf@suse.de

 *

 * Description:

 * This file is based on arch/powerpc/kvm/44x_tlb.c,
@@ -33,10 +34,7 @@ 
#include "e500.h"

#include "trace.h"

#include "timing.h"



#define to_htlb1_esel(esel) (host_tlb_params[1].entries - (esel) - 1)



static struct kvmppc_e500_tlb_params host_tlb_params[E500_TLB_NUM];

#include "e500_mmu_host.h"



static inline unsigned int gtlb0_get_next_victim(

		struct kvmppc_vcpu_e500 *vcpu_e500)
@@ -50,197 +48,6 @@ static inline unsigned int gtlb0_get_next_victim( 
	return victim;

}



static inline unsigned int tlb1_max_shadow_size(void)

{

	/* reserve one entry for magic page */

	return host_tlb_params[1].entries - tlbcam_index - 1;

}



static inline int tlbe_is_writable(struct kvm_book3e_206_tlb_entry *tlbe)

{

	return tlbe->mas7_3 & (MAS3_SW|MAS3_UW);

}



static inline u32 e500_shadow_mas3_attrib(u32 mas3, int usermode)

{

	/* Mask off reserved bits. */

	mas3 &= MAS3_ATTRIB_MASK;



#ifndef CONFIG_KVM_BOOKE_HV

	if (!usermode) {

		/* Guest is in supervisor mode,

		 * so we need to translate guest

		 * supervisor permissions into user permissions. */

		mas3 &= ~E500_TLB_USER_PERM_MASK;

		mas3 |= (mas3 & E500_TLB_SUPER_PERM_MASK) << 1;

	}

	mas3 |= E500_TLB_SUPER_PERM_MASK;

#endif

	return mas3;

}



static inline u32 e500_shadow_mas2_attrib(u32 mas2, int usermode)

{

#ifdef CONFIG_SMP

	return (mas2 & MAS2_ATTRIB_MASK) | MAS2_M;

#else

	return mas2 & MAS2_ATTRIB_MASK;

#endif

}



/*

 * writing shadow tlb entry to host TLB

 */

static inline void __write_host_tlbe(struct kvm_book3e_206_tlb_entry *stlbe,

				     uint32_t mas0)

{

	unsigned long flags;



	local_irq_save(flags);

	mtspr(SPRN_MAS0, mas0);

	mtspr(SPRN_MAS1, stlbe->mas1);

	mtspr(SPRN_MAS2, (unsigned long)stlbe->mas2);

	mtspr(SPRN_MAS3, (u32)stlbe->mas7_3);

	mtspr(SPRN_MAS7, (u32)(stlbe->mas7_3 >> 32));

#ifdef CONFIG_KVM_BOOKE_HV

	mtspr(SPRN_MAS8, stlbe->mas8);

#endif

	asm volatile("isync; tlbwe" : : : "memory");



#ifdef CONFIG_KVM_BOOKE_HV

	/* Must clear mas8 for other host tlbwe's */

	mtspr(SPRN_MAS8, 0);

	isync();

#endif

	local_irq_restore(flags);



	trace_kvm_booke206_stlb_write(mas0, stlbe->mas8, stlbe->mas1,

	                              stlbe->mas2, stlbe->mas7_3);

}



/*

 * Acquire a mas0 with victim hint, as if we just took a TLB miss.

 *

 * We don't care about the address we're searching for, other than that it's

 * in the right set and is not present in the TLB.  Using a zero PID and a

 * userspace address means we don't have to set and then restore MAS5, or

 * calculate a proper MAS6 value.

 */

static u32 get_host_mas0(unsigned long eaddr)

{

	unsigned long flags;

	u32 mas0;



	local_irq_save(flags);

	mtspr(SPRN_MAS6, 0);

	asm volatile("tlbsx 0, %0" : : "b" (eaddr & ~CONFIG_PAGE_OFFSET));

	mas0 = mfspr(SPRN_MAS0);

	local_irq_restore(flags);



	return mas0;

}



/* sesel is for tlb1 only */

static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500,

		int tlbsel, int sesel, struct kvm_book3e_206_tlb_entry *stlbe)

{

	u32 mas0;



	if (tlbsel == 0) {

		mas0 = get_host_mas0(stlbe->mas2);

		__write_host_tlbe(stlbe, mas0);

	} else {

		__write_host_tlbe(stlbe,

				  MAS0_TLBSEL(1) |

				  MAS0_ESEL(to_htlb1_esel(sesel)));

	}

}



/* sesel is for tlb1 only */

static void write_stlbe(struct kvmppc_vcpu_e500 *vcpu_e500,

			struct kvm_book3e_206_tlb_entry *gtlbe,

			struct kvm_book3e_206_tlb_entry *stlbe,

			int stlbsel, int sesel)

{

	int stid;



	preempt_disable();

	stid = kvmppc_e500_get_tlb_stid(&vcpu_e500->vcpu, gtlbe);



	stlbe->mas1 |= MAS1_TID(stid);

	write_host_tlbe(vcpu_e500, stlbsel, sesel, stlbe);

	preempt_enable();

}



#ifdef CONFIG_KVM_E500V2

void kvmppc_map_magic(struct kvm_vcpu *vcpu)

{

	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);

	struct kvm_book3e_206_tlb_entry magic;

	ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;

	unsigned int stid;

	pfn_t pfn;



	pfn = (pfn_t)virt_to_phys((void *)shared_page) >> PAGE_SHIFT;

	get_page(pfn_to_page(pfn));



	preempt_disable();

	stid = kvmppc_e500_get_sid(vcpu_e500, 0, 0, 0, 0);



	magic.mas1 = MAS1_VALID | MAS1_TS | MAS1_TID(stid) |

		     MAS1_TSIZE(BOOK3E_PAGESZ_4K);

	magic.mas2 = vcpu->arch.magic_page_ea | MAS2_M;

	magic.mas7_3 = ((u64)pfn << PAGE_SHIFT) |

		       MAS3_SW | MAS3_SR | MAS3_UW | MAS3_UR;

	magic.mas8 = 0;



	__write_host_tlbe(&magic, MAS0_TLBSEL(1) | MAS0_ESEL(tlbcam_index));

	preempt_enable();

}

#endif



static void inval_gtlbe_on_host(struct kvmppc_vcpu_e500 *vcpu_e500,

				int tlbsel, int esel)

{

	struct kvm_book3e_206_tlb_entry *gtlbe =

		get_entry(vcpu_e500, tlbsel, esel);

	struct tlbe_ref *ref = &vcpu_e500->gtlb_priv[tlbsel][esel].ref;



	/* Don't bother with unmapped entries */

	if (!(ref->flags & E500_TLB_VALID))

		return;



	if (tlbsel == 1 && ref->flags & E500_TLB_BITMAP) {

		u64 tmp = vcpu_e500->g2h_tlb1_map[esel];

		int hw_tlb_indx;

		unsigned long flags;



		local_irq_save(flags);

		while (tmp) {

			hw_tlb_indx = __ilog2_u64(tmp & -tmp);

			mtspr(SPRN_MAS0,

			      MAS0_TLBSEL(1) |

			      MAS0_ESEL(to_htlb1_esel(hw_tlb_indx)));

			mtspr(SPRN_MAS1, 0);

			asm volatile("tlbwe");

			vcpu_e500->h2g_tlb1_rmap[hw_tlb_indx] = 0;

			tmp &= tmp - 1;

		}

		mb();

		vcpu_e500->g2h_tlb1_map[esel] = 0;

		ref->flags &= ~(E500_TLB_BITMAP | E500_TLB_VALID);

		local_irq_restore(flags);



		return;

	}



	/* Guest tlbe is backed by at most one host tlbe per shadow pid. */

	kvmppc_e500_tlbil_one(vcpu_e500, gtlbe);



	/* Mark the TLB as not backed by the host anymore */

	ref->flags &= ~E500_TLB_VALID;

}



static int tlb0_set_base(gva_t addr, int sets, int ways)

{

	int set_base;
@@ -319,70 +126,6 @@ static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500, 
	return -1;

}



static inline void kvmppc_e500_ref_setup(struct tlbe_ref *ref,

					 struct kvm_book3e_206_tlb_entry *gtlbe,

					 pfn_t pfn)

{

	ref->pfn = pfn;

	ref->flags = E500_TLB_VALID;



	if (tlbe_is_writable(gtlbe))

		kvm_set_pfn_dirty(pfn);

}



static inline void kvmppc_e500_ref_release(struct tlbe_ref *ref)

{

	if (ref->flags & E500_TLB_VALID) {

		trace_kvm_booke206_ref_release(ref->pfn, ref->flags);

		ref->flags = 0;

	}

}



static void clear_tlb1_bitmap(struct kvmppc_vcpu_e500 *vcpu_e500)

{

	if (vcpu_e500->g2h_tlb1_map)

		memset(vcpu_e500->g2h_tlb1_map, 0,

		       sizeof(u64) * vcpu_e500->gtlb_params[1].entries);

	if (vcpu_e500->h2g_tlb1_rmap)

		memset(vcpu_e500->h2g_tlb1_rmap, 0,

		       sizeof(unsigned int) * host_tlb_params[1].entries);

}



static void clear_tlb_privs(struct kvmppc_vcpu_e500 *vcpu_e500)

{

	int tlbsel = 0;

	int i;



	for (i = 0; i < vcpu_e500->gtlb_params[tlbsel].entries; i++) {

		struct tlbe_ref *ref =

			&vcpu_e500->gtlb_priv[tlbsel][i].ref;

		kvmppc_e500_ref_release(ref);

	}

}



static void clear_tlb_refs(struct kvmppc_vcpu_e500 *vcpu_e500)

{

	int stlbsel = 1;

	int i;



	kvmppc_e500_tlbil_all(vcpu_e500);



	for (i = 0; i < host_tlb_params[stlbsel].entries; i++) {

		struct tlbe_ref *ref =

			&vcpu_e500->tlb_refs[stlbsel][i];

		kvmppc_e500_ref_release(ref);

	}



	clear_tlb_privs(vcpu_e500);

}



void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu)

{

	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);

	clear_tlb_refs(vcpu_e500);

	clear_tlb1_bitmap(vcpu_e500);

}



static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu,

		unsigned int eaddr, int as)

{
@@ -408,234 +151,6 @@ static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu, 
		| (as ? MAS6_SAS : 0);

}



/* TID must be supplied by the caller */

static inline void kvmppc_e500_setup_stlbe(

	struct kvm_vcpu *vcpu,

	struct kvm_book3e_206_tlb_entry *gtlbe,

	int tsize, struct tlbe_ref *ref, u64 gvaddr,

	struct kvm_book3e_206_tlb_entry *stlbe)

{

	pfn_t pfn = ref->pfn;

	u32 pr = vcpu->arch.shared->msr & MSR_PR;



	BUG_ON(!(ref->flags & E500_TLB_VALID));



	/* Force IPROT=0 for all guest mappings. */

	stlbe->mas1 = MAS1_TSIZE(tsize) | get_tlb_sts(gtlbe) | MAS1_VALID;

	stlbe->mas2 = (gvaddr & MAS2_EPN) |

		      e500_shadow_mas2_attrib(gtlbe->mas2, pr);

	stlbe->mas7_3 = ((u64)pfn << PAGE_SHIFT) |

			e500_shadow_mas3_attrib(gtlbe->mas7_3, pr);



#ifdef CONFIG_KVM_BOOKE_HV

	stlbe->mas8 = MAS8_TGS | vcpu->kvm->arch.lpid;

#endif

}



static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,

	u64 gvaddr, gfn_t gfn, struct kvm_book3e_206_tlb_entry *gtlbe,

	int tlbsel, struct kvm_book3e_206_tlb_entry *stlbe,

	struct tlbe_ref *ref)

{

	struct kvm_memory_slot *slot;

	unsigned long pfn = 0; /* silence GCC warning */

	unsigned long hva;

	int pfnmap = 0;

	int tsize = BOOK3E_PAGESZ_4K;



	/*

	 * Translate guest physical to true physical, acquiring

	 * a page reference if it is normal, non-reserved memory.

	 *

	 * gfn_to_memslot() must succeed because otherwise we wouldn't

	 * have gotten this far.  Eventually we should just pass the slot

	 * pointer through from the first lookup.

	 */

	slot = gfn_to_memslot(vcpu_e500->vcpu.kvm, gfn);

	hva = gfn_to_hva_memslot(slot, gfn);



	if (tlbsel == 1) {

		struct vm_area_struct *vma;

		down_read(&current->mm->mmap_sem);



		vma = find_vma(current->mm, hva);

		if (vma && hva >= vma->vm_start &&

		    (vma->vm_flags & VM_PFNMAP)) {

			/*

			 * This VMA is a physically contiguous region (e.g.

			 * /dev/mem) that bypasses normal Linux page

			 * management.  Find the overlap between the

			 * vma and the memslot.

			 */



			unsigned long start, end;

			unsigned long slot_start, slot_end;



			pfnmap = 1;



			start = vma->vm_pgoff;

			end = start +

			      ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT);



			pfn = start + ((hva - vma->vm_start) >> PAGE_SHIFT);



			slot_start = pfn - (gfn - slot->base_gfn);

			slot_end = slot_start + slot->npages;



			if (start < slot_start)

				start = slot_start;

			if (end > slot_end)

				end = slot_end;



			tsize = (gtlbe->mas1 & MAS1_TSIZE_MASK) >>

				MAS1_TSIZE_SHIFT;



			/*

			 * e500 doesn't implement the lowest tsize bit,

			 * or 1K pages.

			 */

			tsize = max(BOOK3E_PAGESZ_4K, tsize & ~1);



			/*

			 * Now find the largest tsize (up to what the guest

			 * requested) that will cover gfn, stay within the

			 * range, and for which gfn and pfn are mutually

			 * aligned.

			 */



			for (; tsize > BOOK3E_PAGESZ_4K; tsize -= 2) {

				unsigned long gfn_start, gfn_end, tsize_pages;

				tsize_pages = 1 << (tsize - 2);



				gfn_start = gfn & ~(tsize_pages - 1);

				gfn_end = gfn_start + tsize_pages;



				if (gfn_start + pfn - gfn < start)

					continue;

				if (gfn_end + pfn - gfn > end)

					continue;

				if ((gfn & (tsize_pages - 1)) !=

				    (pfn & (tsize_pages - 1)))

					continue;



				gvaddr &= ~((tsize_pages << PAGE_SHIFT) - 1);

				pfn &= ~(tsize_pages - 1);

				break;

			}

		} else if (vma && hva >= vma->vm_start &&

			   (vma->vm_flags & VM_HUGETLB)) {

			unsigned long psize = vma_kernel_pagesize(vma);



			tsize = (gtlbe->mas1 & MAS1_TSIZE_MASK) >>

				MAS1_TSIZE_SHIFT;



			/*

			 * Take the largest page size that satisfies both host

			 * and guest mapping

			 */

			tsize = min(__ilog2(psize) - 10, tsize);



			/*

			 * e500 doesn't implement the lowest tsize bit,

			 * or 1K pages.

			 */

			tsize = max(BOOK3E_PAGESZ_4K, tsize & ~1);

		}



		up_read(&current->mm->mmap_sem);

	}



	if (likely(!pfnmap)) {

		unsigned long tsize_pages = 1 << (tsize + 10 - PAGE_SHIFT);

		pfn = gfn_to_pfn_memslot(slot, gfn);

		if (is_error_noslot_pfn(pfn)) {

			printk(KERN_ERR "Couldn't get real page for gfn %lx!\n",

					(long)gfn);

			return -EINVAL;

		}



		/* Align guest and physical address to page map boundaries */

		pfn &= ~(tsize_pages - 1);

		gvaddr &= ~((tsize_pages << PAGE_SHIFT) - 1);

	}



	/* Drop old ref and setup new one. */

	kvmppc_e500_ref_release(ref);

	kvmppc_e500_ref_setup(ref, gtlbe, pfn);



	kvmppc_e500_setup_stlbe(&vcpu_e500->vcpu, gtlbe, tsize,

				ref, gvaddr, stlbe);



	/* Clear i-cache for new pages */

	kvmppc_mmu_flush_icache(pfn);



	/* Drop refcount on page, so that mmu notifiers can clear it */

	kvm_release_pfn_clean(pfn);



	return 0;

}



/* XXX only map the one-one case, for now use TLB0 */

static int kvmppc_e500_tlb0_map(struct kvmppc_vcpu_e500 *vcpu_e500,

				int esel,

				struct kvm_book3e_206_tlb_entry *stlbe)

{

	struct kvm_book3e_206_tlb_entry *gtlbe;

	struct tlbe_ref *ref;

	int stlbsel = 0;

	int sesel = 0;

	int r;



	gtlbe = get_entry(vcpu_e500, 0, esel);

	ref = &vcpu_e500->gtlb_priv[0][esel].ref;



	r = kvmppc_e500_shadow_map(vcpu_e500, get_tlb_eaddr(gtlbe),

			get_tlb_raddr(gtlbe) >> PAGE_SHIFT,

			gtlbe, 0, stlbe, ref);

	if (r)

		return r;



	write_stlbe(vcpu_e500, gtlbe, stlbe, stlbsel, sesel);



	return 0;

}



/* Caller must ensure that the specified guest TLB entry is safe to insert into

 * the shadow TLB. */

/* XXX for both one-one and one-to-many , for now use TLB1 */

static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500,

		u64 gvaddr, gfn_t gfn, struct kvm_book3e_206_tlb_entry *gtlbe,

		struct kvm_book3e_206_tlb_entry *stlbe, int esel)

{

	struct tlbe_ref *ref;

	unsigned int sesel;

	int r;

	int stlbsel = 1;



	sesel = vcpu_e500->host_tlb1_nv++;



	if (unlikely(vcpu_e500->host_tlb1_nv >= tlb1_max_shadow_size()))

		vcpu_e500->host_tlb1_nv = 0;



	ref = &vcpu_e500->tlb_refs[1][sesel];

	r = kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, stlbe,

				   ref);

	if (r)

		return r;



	vcpu_e500->g2h_tlb1_map[esel] |= (u64)1 << sesel;

	vcpu_e500->gtlb_priv[1][esel].ref.flags |= E500_TLB_BITMAP;

	if (vcpu_e500->h2g_tlb1_rmap[sesel]) {

		unsigned int idx = vcpu_e500->h2g_tlb1_rmap[sesel];

		vcpu_e500->g2h_tlb1_map[idx] &= ~(1ULL << sesel);

	}

	vcpu_e500->h2g_tlb1_rmap[sesel] = esel;



	write_stlbe(vcpu_e500, gtlbe, stlbe, stlbsel, sesel);



	return 0;

}



static void kvmppc_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500)

{

	int size = vcpu_e500->gtlb_params[1].entries;
@@ -1020,85 +535,6 @@ void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu) 
{

}



void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,

			unsigned int index)

{

	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);

	struct tlbe_priv *priv;

	struct kvm_book3e_206_tlb_entry *gtlbe, stlbe;

	int tlbsel = tlbsel_of(index);

	int esel = esel_of(index);



	gtlbe = get_entry(vcpu_e500, tlbsel, esel);



	switch (tlbsel) {

	case 0:

		priv = &vcpu_e500->gtlb_priv[tlbsel][esel];



		/* Triggers after clear_tlb_refs or on initial mapping */

		if (!(priv->ref.flags & E500_TLB_VALID)) {

			kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe);

		} else {

			kvmppc_e500_setup_stlbe(vcpu, gtlbe, BOOK3E_PAGESZ_4K,

						&priv->ref, eaddr, &stlbe);

			write_stlbe(vcpu_e500, gtlbe, &stlbe, 0, 0);

		}

		break;



	case 1: {

		gfn_t gfn = gpaddr >> PAGE_SHIFT;

		kvmppc_e500_tlb1_map(vcpu_e500, eaddr, gfn, gtlbe, &stlbe,

				     esel);

		break;

	}



	default:

		BUG();

		break;

	}

}



/************* MMU Notifiers *************/



int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)

{

	trace_kvm_unmap_hva(hva);



	/*

	 * Flush all shadow tlb entries everywhere. This is slow, but

	 * we are 100% sure that we catch the to be unmapped page

	 */

	kvm_flush_remote_tlbs(kvm);



	return 0;

}



int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)

{

	/* kvm_unmap_hva flushes everything anyways */

	kvm_unmap_hva(kvm, start);



	return 0;

}



int kvm_age_hva(struct kvm *kvm, unsigned long hva)

{

	/* XXX could be more clever ;) */

	return 0;

}



int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)

{

	/* XXX could be more clever ;) */

	return 0;

}



void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)

{

	/* The page will get remapped properly on its next fault */

	kvm_unmap_hva(kvm, hva);

}



/*****************************************/



static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500)
@@ -1309,37 +745,8 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500) 
	int entry_size = sizeof(struct kvm_book3e_206_tlb_entry);

	int entries = KVM_E500_TLB0_SIZE + KVM_E500_TLB1_SIZE;



	host_tlb_params[0].entries = mfspr(SPRN_TLB0CFG) & TLBnCFG_N_ENTRY;

	host_tlb_params[1].entries = mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY;



	/*

	 * This should never happen on real e500 hardware, but is

	 * architecturally possible -- e.g. in some weird nested

	 * virtualization case.

	 */

	if (host_tlb_params[0].entries == 0 ||

	    host_tlb_params[1].entries == 0) {

		pr_err("%s: need to know host tlb size\n", __func__);

		return -ENODEV;

	}



	host_tlb_params[0].ways = (mfspr(SPRN_TLB0CFG) & TLBnCFG_ASSOC) >>

				  TLBnCFG_ASSOC_SHIFT;

	host_tlb_params[1].ways = host_tlb_params[1].entries;



	if (!is_power_of_2(host_tlb_params[0].entries) ||

	    !is_power_of_2(host_tlb_params[0].ways) ||

	    host_tlb_params[0].entries < host_tlb_params[0].ways ||

	    host_tlb_params[0].ways == 0) {

		pr_err("%s: bad tlb0 host config: %u entries %u ways\n",

		       __func__, host_tlb_params[0].entries,

		       host_tlb_params[0].ways);

		return -ENODEV;

	}



	host_tlb_params[0].sets =

		host_tlb_params[0].entries / host_tlb_params[0].ways;

	host_tlb_params[1].sets = 1;

	if (e500_mmu_host_init(vcpu_e500))

		goto err;



	vcpu_e500->gtlb_params[0].entries = KVM_E500_TLB0_SIZE;

	vcpu_e500->gtlb_params[1].entries = KVM_E500_TLB1_SIZE;
@@ -1358,18 +765,6 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500) 
	vcpu_e500->gtlb_offset[0] = 0;

	vcpu_e500->gtlb_offset[1] = KVM_E500_TLB0_SIZE;



	vcpu_e500->tlb_refs[0] =

		kzalloc(sizeof(struct tlbe_ref) * host_tlb_params[0].entries,

			GFP_KERNEL);

	if (!vcpu_e500->tlb_refs[0])

		goto err;



	vcpu_e500->tlb_refs[1] =

		kzalloc(sizeof(struct tlbe_ref) * host_tlb_params[1].entries,

			GFP_KERNEL);

	if (!vcpu_e500->tlb_refs[1])

		goto err;



	vcpu_e500->gtlb_priv[0] = kzalloc(sizeof(struct tlbe_ref) *

					  vcpu_e500->gtlb_params[0].entries,

					  GFP_KERNEL);
@@ -1388,12 +783,6 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500) 
	if (!vcpu_e500->g2h_tlb1_map)

		goto err;



	vcpu_e500->h2g_tlb1_rmap = kzalloc(sizeof(unsigned int) *

					   host_tlb_params[1].entries,

					   GFP_KERNEL);

	if (!vcpu_e500->h2g_tlb1_rmap)

		goto err;



	/* Init TLB configuration register */

	vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) &

			     ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
@@ -1412,15 +801,11 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500) 


err:

	free_gtlb(vcpu_e500);

	kfree(vcpu_e500->tlb_refs[0]);

	kfree(vcpu_e500->tlb_refs[1]);

	return -1;

}



void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500)

{

	free_gtlb(vcpu_e500);

	kfree(vcpu_e500->h2g_tlb1_rmap);

	kfree(vcpu_e500->tlb_refs[0]);

	kfree(vcpu_e500->tlb_refs[1]);

	e500_mmu_host_uninit(vcpu_e500);

}

arch/powerpc/kvm/e500_mmu_host.c

0 → 100644
+672 −0

File added.

Preview size limit exceeded, changes collapsed.

arch/powerpc/kvm/e500_mmu_host.h

0 → 100644
+20 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2008-2013 Freescale Semiconductor, Inc. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License, version 2, as

 * published by the Free Software Foundation.

 */



#ifndef KVM_E500_MMU_HOST_H

#define KVM_E500_MMU_HOST_H



void inval_gtlbe_on_host(struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel,

			 int esel);



void clear_tlb1_bitmap(struct kvmppc_vcpu_e500 *vcpu_e500);

void clear_tlb_refs(struct kvmppc_vcpu_e500 *vcpu_e500);

int e500_mmu_host_init(struct kvmppc_vcpu_e500 *vcpu_e500);

void e500_mmu_host_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);



#endif /* KVM_E500_MMU_HOST_H */

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