[linux-2.6-block.git] / arch / powerpc / include / asm / kvm_book3s_64.h

/*
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright SUSE Linux Products GmbH 2010
 *
 * Authors: Alexander Graf <agraf@suse.de>
 */

#ifndef __ASM_KVM_BOOK3S_64_H__
#define __ASM_KVM_BOOK3S_64_H__

#ifdef CONFIG_KVM_BOOK3S_PR
static inline struct kvmppc_book3s_shadow_vcpu *svcpu_get(struct kvm_vcpu *vcpu)
{
	preempt_disable();
	return &get_paca()->shadow_vcpu;
}

static inline void svcpu_put(struct kvmppc_book3s_shadow_vcpu *svcpu)
{
	preempt_enable();
}
#endif

#define SPAPR_TCE_SHIFT		12

#ifdef CONFIG_KVM_BOOK3S_64_HV
/* For now use fixed-size 16MB page table */
#define HPT_ORDER	24
#define HPT_NPTEG	(1ul << (HPT_ORDER - 7))	/* 128B per pteg */
#define HPT_NPTE	(HPT_NPTEG << 3)		/* 8 PTEs per PTEG */
#define HPT_HASH_MASK	(HPT_NPTEG - 1)
#endif

/*
 * We use a lock bit in HPTE dword 0 to synchronize updates and
 * accesses to each HPTE, and another bit to indicate non-present
 * HPTEs.
 */
#define HPTE_V_HVLOCK	0x40UL

static inline long try_lock_hpte(unsigned long *hpte, unsigned long bits)
{
	unsigned long tmp, old;

	asm volatile("	ldarx	%0,0,%2\n"
		     "	and.	%1,%0,%3\n"
		     "	bne	2f\n"
		     "	ori	%0,%0,%4\n"
		     "  stdcx.	%0,0,%2\n"
		     "	beq+	2f\n"
		     "	li	%1,%3\n"
		     "2:	isync"
		     : "=&r" (tmp), "=&r" (old)
		     : "r" (hpte), "r" (bits), "i" (HPTE_V_HVLOCK)
		     : "cc", "memory");
	return old == 0;
}

static inline unsigned long compute_tlbie_rb(unsigned long v, unsigned long r,
					     unsigned long pte_index)
{
	unsigned long rb, va_low;

	rb = (v & ~0x7fUL) << 16;		/* AVA field */
	va_low = pte_index >> 3;
	if (v & HPTE_V_SECONDARY)
		va_low = ~va_low;
	/* xor vsid from AVA */
	if (!(v & HPTE_V_1TB_SEG))
		va_low ^= v >> 12;
	else
		va_low ^= v >> 24;
	va_low &= 0x7ff;
	if (v & HPTE_V_LARGE) {
		rb |= 1;			/* L field */
		if (cpu_has_feature(CPU_FTR_ARCH_206) &&
		    (r & 0xff000)) {
			/* non-16MB large page, must be 64k */
			/* (masks depend on page size) */
			rb |= 0x1000;		/* page encoding in LP field */
			rb |= (va_low & 0x7f) << 16; /* 7b of VA in AVA/LP field */
			rb |= (va_low & 0xfe);	/* AVAL field (P7 doesn't seem to care) */
		}
	} else {
		/* 4kB page */
		rb |= (va_low & 0x7ff) << 12;	/* remaining 11b of VA */
	}
	rb |= (v >> 54) & 0x300;		/* B field */
	return rb;
}

static inline unsigned long hpte_page_size(unsigned long h, unsigned long l)
{
	/* only handle 4k, 64k and 16M pages for now */
	if (!(h & HPTE_V_LARGE))
		return 1ul << 12;		/* 4k page */
	if ((l & 0xf000) == 0x1000 && cpu_has_feature(CPU_FTR_ARCH_206))
		return 1ul << 16;		/* 64k page */
	if ((l & 0xff000) == 0)
		return 1ul << 24;		/* 16M page */
	return 0;				/* error */
}

#endif /* __ASM_KVM_BOOK3S_64_H__ */
Commit	Line	Data
3ae07890 AG	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License, version 2, as
	4	* published by the Free Software Foundation.
	5	*
	6	* This program is distributed in the hope that it will be useful,
	7	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	8	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	9	* GNU General Public License for more details.
	10	*
	11	* You should have received a copy of the GNU General Public License
	12	* along with this program; if not, write to the Free Software
	13	* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	14	*
	15	* Copyright SUSE Linux Products GmbH 2010
	16	*
	17	* Authors: Alexander Graf <agraf@suse.de>
	18	*/
	19
	20	#ifndef __ASM_KVM_BOOK3S_64_H__
	21	#define __ASM_KVM_BOOK3S_64_H__
	22
de56a948	23	#ifdef CONFIG_KVM_BOOK3S_PR
468a12c2	24	static inline struct kvmppc_book3s_shadow_vcpu svcpu_get(struct kvm_vcpu vcpu)
3ae07890	25	{
468a12c2	26	preempt_disable();
3ae07890 AG	27	return &get_paca()->shadow_vcpu;
3ae07890 AG	28	}
468a12c2 AG	29
	30	static inline void svcpu_put(struct kvmppc_book3s_shadow_vcpu *svcpu)
	31	{
	32	preempt_enable();
	33	}
de56a948	34	#endif
3ae07890	35
54738c09 DG	36	#define SPAPR_TCE_SHIFT 12
54738c09 DG	37
8936dda4 PM	38	#ifdef CONFIG_KVM_BOOK3S_64_HV
	39	/* For now use fixed-size 16MB page table */
	40	#define HPT_ORDER 24
	41	#define HPT_NPTEG (1ul << (HPT_ORDER - 7)) /* 128B per pteg */
	42	#define HPT_NPTE (HPT_NPTEG << 3) /* 8 PTEs per PTEG */
	43	#define HPT_HASH_MASK (HPT_NPTEG - 1)
	44	#endif
	45
075295dd PM	46	/*
	47	* We use a lock bit in HPTE dword 0 to synchronize updates and
	48	* accesses to each HPTE, and another bit to indicate non-present
	49	* HPTEs.
	50	*/
	51	#define HPTE_V_HVLOCK 0x40UL
	52
	53	static inline long try_lock_hpte(unsigned long *hpte, unsigned long bits)
	54	{
	55	unsigned long tmp, old;
	56
	57	asm volatile(" ldarx %0,0,%2\n"
	58	" and. %1,%0,%3\n"
	59	" bne 2f\n"
	60	" ori %0,%0,%4\n"
	61	" stdcx. %0,0,%2\n"
	62	" beq+ 2f\n"
	63	" li %1,%3\n"
	64	"2: isync"
	65	: "=&r" (tmp), "=&r" (old)
	66	: "r" (hpte), "r" (bits), "i" (HPTE_V_HVLOCK)
	67	: "cc", "memory");
	68	return old == 0;
	69	}
	70
36cc66d6 AS	71	static inline unsigned long compute_tlbie_rb(unsigned long v, unsigned long r,
	72	unsigned long pte_index)
	73	{
	74	unsigned long rb, va_low;
	75
	76	rb = (v & ~0x7fUL) << 16; /* AVA field */
	77	va_low = pte_index >> 3;
	78	if (v & HPTE_V_SECONDARY)
	79	va_low = ~va_low;
	80	/* xor vsid from AVA */
	81	if (!(v & HPTE_V_1TB_SEG))
	82	va_low ^= v >> 12;
	83	else
	84	va_low ^= v >> 24;
	85	va_low &= 0x7ff;
	86	if (v & HPTE_V_LARGE) {
	87	rb \|= 1; /* L field */
	88	if (cpu_has_feature(CPU_FTR_ARCH_206) &&
	89	(r & 0xff000)) {
	90	/* non-16MB large page, must be 64k */
	91	/* (masks depend on page size) */
	92	rb \|= 0x1000; /* page encoding in LP field */
	93	rb \|= (va_low & 0x7f) << 16; /* 7b of VA in AVA/LP field */
	94	rb \|= (va_low & 0xfe); /* AVAL field (P7 doesn't seem to care) */
	95	}
	96	} else {
	97	/* 4kB page */
	98	rb \|= (va_low & 0x7ff) << 12; /* remaining 11b of VA */
	99	}
	100	rb \|= (v >> 54) & 0x300; /* B field */
	101	return rb;
	102	}
	103
c77162de PM	104	static inline unsigned long hpte_page_size(unsigned long h, unsigned long l)
	105	{
	106	/* only handle 4k, 64k and 16M pages for now */
	107	if (!(h & HPTE_V_LARGE))
	108	return 1ul << 12; /* 4k page */
	109	if ((l & 0xf000) == 0x1000 && cpu_has_feature(CPU_FTR_ARCH_206))
	110	return 1ul << 16; /* 64k page */
	111	if ((l & 0xff000) == 0)
	112	return 1ul << 24; /* 16M page */
	113	return 0; /* error */
	114	}
	115
3ae07890	116	#endif /* __ASM_KVM_BOOK3S_64_H__ */