Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm (3749c66c) · Commits · 戴 / test

drivers/kvm/Kconfig

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Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@ if VIRTUALIZATION
		config KVM
		tristate "Kernel-based Virtual Machine (KVM) support"
		depends on X86 && EXPERIMENTAL
		select PREEMPT_NOTIFIERS
		select ANON_INODES
		---help---
		Support hosting fully virtualized guest machines using hardware

drivers/kvm/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -2,7 +2,7 @@
		# Makefile for Kernel-based Virtual Machine module
		#

		kvm-objs := kvm_main.o mmu.o x86_emulate.o
		kvm-objs := kvm_main.o mmu.o x86_emulate.o i8259.o irq.o lapic.o ioapic.o
		obj-$(CONFIG_KVM) += kvm.o
		kvm-intel-objs = vmx.o
		obj-$(CONFIG_KVM_INTEL) += kvm-intel.o

drivers/kvm/i8259.c

0 → 100644

+450 −0

Original line number	Diff line number	Diff line
		/*
		* 8259 interrupt controller emulation
		*
		* Copyright (c) 2003-2004 Fabrice Bellard
		* Copyright (c) 2007 Intel Corporation
		*
		* Permission is hereby granted, free of charge, to any person obtaining a copy
		* of this software and associated documentation files (the "Software"), to deal
		* in the Software without restriction, including without limitation the rights
		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
		* copies of the Software, and to permit persons to whom the Software is
		* furnished to do so, subject to the following conditions:
		*
		* The above copyright notice and this permission notice shall be included in
		* all copies or substantial portions of the Software.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
		* THE SOFTWARE.
		* Authors:
		* Yaozu (Eddie) Dong <Eddie.dong@intel.com>
		* Port from Qemu.
		*/
		#include <linux/mm.h>
		#include "irq.h"

		/*
		* set irq level. If an edge is detected, then the IRR is set to 1
		*/
		static inline void pic_set_irq1(struct kvm_kpic_state *s, int irq, int level)
		{
		int mask;
		mask = 1 << irq;
		if (s->elcr & mask) /* level triggered */
		if (level) {
		s->irr \|= mask;
		s->last_irr \|= mask;
		} else {
		s->irr &= ~mask;
		s->last_irr &= ~mask;
		}
		else /* edge triggered */
		if (level) {
		if ((s->last_irr & mask) == 0)
		s->irr \|= mask;
		s->last_irr \|= mask;
		} else
		s->last_irr &= ~mask;
		}

		/*
		* return the highest priority found in mask (highest = smallest
		* number). Return 8 if no irq
		*/
		static inline int get_priority(struct kvm_kpic_state *s, int mask)
		{
		int priority;
		if (mask == 0)
		return 8;
		priority = 0;
		while ((mask & (1 << ((priority + s->priority_add) & 7))) == 0)
		priority++;
		return priority;
		}

		/*
		* return the pic wanted interrupt. return -1 if none
		*/
		static int pic_get_irq(struct kvm_kpic_state *s)
		{
		int mask, cur_priority, priority;

		mask = s->irr & ~s->imr;
		priority = get_priority(s, mask);
		if (priority == 8)
		return -1;
		/*
		* compute current priority. If special fully nested mode on the
		* master, the IRQ coming from the slave is not taken into account
		* for the priority computation.
		*/
		mask = s->isr;
		if (s->special_fully_nested_mode && s == &s->pics_state->pics[0])
		mask &= ~(1 << 2);
		cur_priority = get_priority(s, mask);
		if (priority < cur_priority)
		/*
		* higher priority found: an irq should be generated
		*/
		return (priority + s->priority_add) & 7;
		else
		return -1;
		}

		/*
		* raise irq to CPU if necessary. must be called every time the active
		* irq may change
		*/
		static void pic_update_irq(struct kvm_pic *s)
		{
		int irq2, irq;

		irq2 = pic_get_irq(&s->pics[1]);
		if (irq2 >= 0) {
		/*
		* if irq request by slave pic, signal master PIC
		*/
		pic_set_irq1(&s->pics[0], 2, 1);
		pic_set_irq1(&s->pics[0], 2, 0);
		}
		irq = pic_get_irq(&s->pics[0]);
		if (irq >= 0)
		s->irq_request(s->irq_request_opaque, 1);
		else
		s->irq_request(s->irq_request_opaque, 0);
		}

		void kvm_pic_update_irq(struct kvm_pic *s)
		{
		pic_update_irq(s);
		}

		void kvm_pic_set_irq(void *opaque, int irq, int level)
		{
		struct kvm_pic *s = opaque;

		pic_set_irq1(&s->pics[irq >> 3], irq & 7, level);
		pic_update_irq(s);
		}

		/*
		* acknowledge interrupt 'irq'
		*/
		static inline void pic_intack(struct kvm_kpic_state *s, int irq)
		{
		if (s->auto_eoi) {
		if (s->rotate_on_auto_eoi)
		s->priority_add = (irq + 1) & 7;
		} else
		s->isr \|= (1 << irq);
		/*
		* We don't clear a level sensitive interrupt here
		*/
		if (!(s->elcr & (1 << irq)))
		s->irr &= ~(1 << irq);
		}

		int kvm_pic_read_irq(struct kvm_pic *s)
		{
		int irq, irq2, intno;

		irq = pic_get_irq(&s->pics[0]);
		if (irq >= 0) {
		pic_intack(&s->pics[0], irq);
		if (irq == 2) {
		irq2 = pic_get_irq(&s->pics[1]);
		if (irq2 >= 0)
		pic_intack(&s->pics[1], irq2);
		else
		/*
		* spurious IRQ on slave controller
		*/
		irq2 = 7;
		intno = s->pics[1].irq_base + irq2;
		irq = irq2 + 8;
		} else
		intno = s->pics[0].irq_base + irq;
		} else {
		/*
		* spurious IRQ on host controller
		*/
		irq = 7;
		intno = s->pics[0].irq_base + irq;
		}
		pic_update_irq(s);

		return intno;
		}

		static void pic_reset(void *opaque)
		{
		struct kvm_kpic_state *s = opaque;

		s->last_irr = 0;
		s->irr = 0;
		s->imr = 0;
		s->isr = 0;
		s->priority_add = 0;
		s->irq_base = 0;
		s->read_reg_select = 0;
		s->poll = 0;
		s->special_mask = 0;
		s->init_state = 0;
		s->auto_eoi = 0;
		s->rotate_on_auto_eoi = 0;
		s->special_fully_nested_mode = 0;
		s->init4 = 0;
		}

		static void pic_ioport_write(void *opaque, u32 addr, u32 val)
		{
		struct kvm_kpic_state *s = opaque;
		int priority, cmd, irq;

		addr &= 1;
		if (addr == 0) {
		if (val & 0x10) {
		pic_reset(s); /* init */
		/*
		* deassert a pending interrupt
		*/
		s->pics_state->irq_request(s->pics_state->
		irq_request_opaque, 0);
		s->init_state = 1;
		s->init4 = val & 1;
		if (val & 0x02)
		printk(KERN_ERR "single mode not supported");
		if (val & 0x08)
		printk(KERN_ERR
		"level sensitive irq not supported");
		} else if (val & 0x08) {
		if (val & 0x04)
		s->poll = 1;
		if (val & 0x02)
		s->read_reg_select = val & 1;
		if (val & 0x40)
		s->special_mask = (val >> 5) & 1;
		} else {
		cmd = val >> 5;
		switch (cmd) {
		case 0:
		case 4:
		s->rotate_on_auto_eoi = cmd >> 2;
		break;
		case 1: /* end of interrupt */
		case 5:
		priority = get_priority(s, s->isr);
		if (priority != 8) {
		irq = (priority + s->priority_add) & 7;
		s->isr &= ~(1 << irq);
		if (cmd == 5)
		s->priority_add = (irq + 1) & 7;
		pic_update_irq(s->pics_state);
		}
		break;
		case 3:
		irq = val & 7;
		s->isr &= ~(1 << irq);
		pic_update_irq(s->pics_state);
		break;
		case 6:
		s->priority_add = (val + 1) & 7;
		pic_update_irq(s->pics_state);
		break;
		case 7:
		irq = val & 7;
		s->isr &= ~(1 << irq);
		s->priority_add = (irq + 1) & 7;
		pic_update_irq(s->pics_state);
		break;
		default:
		break; /* no operation */
		}
		}
		} else
		switch (s->init_state) {
		case 0: /* normal mode */
		s->imr = val;
		pic_update_irq(s->pics_state);
		break;
		case 1:
		s->irq_base = val & 0xf8;
		s->init_state = 2;
		break;
		case 2:
		if (s->init4)
		s->init_state = 3;
		else
		s->init_state = 0;
		break;
		case 3:
		s->special_fully_nested_mode = (val >> 4) & 1;
		s->auto_eoi = (val >> 1) & 1;
		s->init_state = 0;
		break;
		}
		}

		static u32 pic_poll_read(struct kvm_kpic_state *s, u32 addr1)
		{
		int ret;

		ret = pic_get_irq(s);
		if (ret >= 0) {
		if (addr1 >> 7) {
		s->pics_state->pics[0].isr &= ~(1 << 2);
		s->pics_state->pics[0].irr &= ~(1 << 2);
		}
		s->irr &= ~(1 << ret);
		s->isr &= ~(1 << ret);
		if (addr1 >> 7 \|\| ret != 2)
		pic_update_irq(s->pics_state);
		} else {
		ret = 0x07;
		pic_update_irq(s->pics_state);
		}

		return ret;
		}

		static u32 pic_ioport_read(void *opaque, u32 addr1)
		{
		struct kvm_kpic_state *s = opaque;
		unsigned int addr;
		int ret;

		addr = addr1;
		addr &= 1;
		if (s->poll) {
		ret = pic_poll_read(s, addr1);
		s->poll = 0;
		} else
		if (addr == 0)
		if (s->read_reg_select)
		ret = s->isr;
		else
		ret = s->irr;
		else
		ret = s->imr;
		return ret;
		}

		static void elcr_ioport_write(void *opaque, u32 addr, u32 val)
		{
		struct kvm_kpic_state *s = opaque;
		s->elcr = val & s->elcr_mask;
		}

		static u32 elcr_ioport_read(void *opaque, u32 addr1)
		{
		struct kvm_kpic_state *s = opaque;
		return s->elcr;
		}

		static int picdev_in_range(struct kvm_io_device *this, gpa_t addr)
		{
		switch (addr) {
		case 0x20:
		case 0x21:
		case 0xa0:
		case 0xa1:
		case 0x4d0:
		case 0x4d1:
		return 1;
		default:
		return 0;
		}
		}

		static void picdev_write(struct kvm_io_device *this,
		gpa_t addr, int len, const void *val)
		{
		struct kvm_pic *s = this->private;
		unsigned char data = (unsigned char )val;

		if (len != 1) {
		if (printk_ratelimit())
		printk(KERN_ERR "PIC: non byte write\n");
		return;
		}
		switch (addr) {
		case 0x20:
		case 0x21:
		case 0xa0:
		case 0xa1:
		pic_ioport_write(&s->pics[addr >> 7], addr, data);
		break;
		case 0x4d0:
		case 0x4d1:
		elcr_ioport_write(&s->pics[addr & 1], addr, data);
		break;
		}
		}

		static void picdev_read(struct kvm_io_device *this,
		gpa_t addr, int len, void *val)
		{
		struct kvm_pic *s = this->private;
		unsigned char data = 0;

		if (len != 1) {
		if (printk_ratelimit())
		printk(KERN_ERR "PIC: non byte read\n");
		return;
		}
		switch (addr) {
		case 0x20:
		case 0x21:
		case 0xa0:
		case 0xa1:
		data = pic_ioport_read(&s->pics[addr >> 7], addr);
		break;
		case 0x4d0:
		case 0x4d1:
		data = elcr_ioport_read(&s->pics[addr & 1], addr);
		break;
		}
		(unsigned char )val = data;
		}

		/*
		* callback when PIC0 irq status changed
		*/
		static void pic_irq_request(void *opaque, int level)
		{
		struct kvm *kvm = opaque;
		struct kvm_vcpu *vcpu = kvm->vcpus[0];

		pic_irqchip(kvm)->output = level;
		if (vcpu)
		kvm_vcpu_kick(vcpu);
		}

		struct kvm_pic kvm_create_pic(struct kvm kvm)
		{
		struct kvm_pic *s;
		s = kzalloc(sizeof(struct kvm_pic), GFP_KERNEL);
		if (!s)
		return NULL;
		s->pics[0].elcr_mask = 0xf8;
		s->pics[1].elcr_mask = 0xde;
		s->irq_request = pic_irq_request;
		s->irq_request_opaque = kvm;
		s->pics[0].pics_state = s;
		s->pics[1].pics_state = s;

		/*
		* Initialize PIO device
		*/
		s->dev.read = picdev_read;
		s->dev.write = picdev_write;
		s->dev.in_range = picdev_in_range;
		s->dev.private = s;
		kvm_io_bus_register_dev(&kvm->pio_bus, &s->dev);
		return s;
		}

drivers/kvm/ioapic.c

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Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2001 MandrakeSoft S.A.
		*
		* MandrakeSoft S.A.
		* 43, rue d'Aboukir
		* 75002 Paris - France
		* http://www.linux-mandrake.com/
		* http://www.mandrakesoft.com/
		*
		* This library is free software; you can redistribute it and/or
		* modify it under the terms of the GNU Lesser General Public
		* License as published by the Free Software Foundation; either
		* version 2 of the License, or (at your option) any later version.
		*
		* This library 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
		* Lesser General Public License for more details.
		*
		* You should have received a copy of the GNU Lesser General Public
		* License along with this library; if not, write to the Free Software
		* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		*
		* Yunhong Jiang <yunhong.jiang@intel.com>
		* Yaozu (Eddie) Dong <eddie.dong@intel.com>
		* Based on Xen 3.1 code.
		*/

		#include "kvm.h"
		#include <linux/kvm.h>
		#include <linux/mm.h>
		#include <linux/highmem.h>
		#include <linux/smp.h>
		#include <linux/hrtimer.h>
		#include <linux/io.h>
		#include <asm/processor.h>
		#include <asm/msr.h>
		#include <asm/page.h>
		#include <asm/current.h>
		#include <asm/apicdef.h>
		#include <asm/io_apic.h>
		#include "irq.h"
		/* #define ioapic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) */
		#define ioapic_debug(fmt, arg...)
		static void ioapic_deliver(struct kvm_ioapic *vioapic, int irq);

		static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic,
		unsigned long addr,
		unsigned long length)
		{
		unsigned long result = 0;

		switch (ioapic->ioregsel) {
		case IOAPIC_REG_VERSION:
		result = ((((IOAPIC_NUM_PINS - 1) & 0xff) << 16)
		\| (IOAPIC_VERSION_ID & 0xff));
		break;

		case IOAPIC_REG_APIC_ID:
		case IOAPIC_REG_ARB_ID:
		result = ((ioapic->id & 0xf) << 24);
		break;

		default:
		{
		u32 redir_index = (ioapic->ioregsel - 0x10) >> 1;
		u64 redir_content;

		ASSERT(redir_index < IOAPIC_NUM_PINS);

		redir_content = ioapic->redirtbl[redir_index].bits;
		result = (ioapic->ioregsel & 0x1) ?
		(redir_content >> 32) & 0xffffffff :
		redir_content & 0xffffffff;
		break;
		}
		}

		return result;
		}

		static void ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx)
		{
		union ioapic_redir_entry *pent;

		pent = &ioapic->redirtbl[idx];

		if (!pent->fields.mask) {
		ioapic_deliver(ioapic, idx);
		if (pent->fields.trig_mode == IOAPIC_LEVEL_TRIG)
		pent->fields.remote_irr = 1;
		}
		if (!pent->fields.trig_mode)
		ioapic->irr &= ~(1 << idx);
		}

		static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
		{
		unsigned index;

		switch (ioapic->ioregsel) {
		case IOAPIC_REG_VERSION:
		/* Writes are ignored. */
		break;

		case IOAPIC_REG_APIC_ID:
		ioapic->id = (val >> 24) & 0xf;
		break;

		case IOAPIC_REG_ARB_ID:
		break;

		default:
		index = (ioapic->ioregsel - 0x10) >> 1;

		ioapic_debug("change redir index %x val %x", index, val);
		if (index >= IOAPIC_NUM_PINS)
		return;
		if (ioapic->ioregsel & 1) {
		ioapic->redirtbl[index].bits &= 0xffffffff;
		ioapic->redirtbl[index].bits \|= (u64) val << 32;
		} else {
		ioapic->redirtbl[index].bits &= ~0xffffffffULL;
		ioapic->redirtbl[index].bits \|= (u32) val;
		ioapic->redirtbl[index].fields.remote_irr = 0;
		}
		if (ioapic->irr & (1 << index))
		ioapic_service(ioapic, index);
		break;
		}
		}

		static void ioapic_inj_irq(struct kvm_ioapic *ioapic,
		struct kvm_lapic *target,
		u8 vector, u8 trig_mode, u8 delivery_mode)
		{
		ioapic_debug("irq %d trig %d deliv %d", vector, trig_mode,
		delivery_mode);

		ASSERT((delivery_mode == dest_Fixed) \|\|
		(delivery_mode == dest_LowestPrio));

		kvm_apic_set_irq(target, vector, trig_mode);
		}

		static u32 ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest,
		u8 dest_mode)
		{
		u32 mask = 0;
		int i;
		struct kvm *kvm = ioapic->kvm;
		struct kvm_vcpu *vcpu;

		ioapic_debug("dest %d dest_mode %d", dest, dest_mode);

		if (dest_mode == 0) { /* Physical mode. */
		if (dest == 0xFF) { /* Broadcast. */
		for (i = 0; i < KVM_MAX_VCPUS; ++i)
		if (kvm->vcpus[i] && kvm->vcpus[i]->apic)
		mask \|= 1 << i;
		return mask;
		}
		for (i = 0; i < KVM_MAX_VCPUS; ++i) {
		vcpu = kvm->vcpus[i];
		if (!vcpu)
		continue;
		if (kvm_apic_match_physical_addr(vcpu->apic, dest)) {
		if (vcpu->apic)
		mask = 1 << i;
		break;
		}
		}
		} else if (dest != 0) /* Logical mode, MDA non-zero. */
		for (i = 0; i < KVM_MAX_VCPUS; ++i) {
		vcpu = kvm->vcpus[i];
		if (!vcpu)
		continue;
		if (vcpu->apic &&
		kvm_apic_match_logical_addr(vcpu->apic, dest))
		mask \|= 1 << vcpu->vcpu_id;
		}
		ioapic_debug("mask %x", mask);
		return mask;
		}

		static void ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
		{
		u8 dest = ioapic->redirtbl[irq].fields.dest_id;
		u8 dest_mode = ioapic->redirtbl[irq].fields.dest_mode;
		u8 delivery_mode = ioapic->redirtbl[irq].fields.delivery_mode;
		u8 vector = ioapic->redirtbl[irq].fields.vector;
		u8 trig_mode = ioapic->redirtbl[irq].fields.trig_mode;
		u32 deliver_bitmask;
		struct kvm_lapic *target;
		struct kvm_vcpu *vcpu;
		int vcpu_id;

		ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x "
		"vector=%x trig_mode=%x",
		dest, dest_mode, delivery_mode, vector, trig_mode);

		deliver_bitmask = ioapic_get_delivery_bitmask(ioapic, dest, dest_mode);
		if (!deliver_bitmask) {
		ioapic_debug("no target on destination");
		return;
		}

		switch (delivery_mode) {
		case dest_LowestPrio:
		target =
		kvm_apic_round_robin(ioapic->kvm, vector, deliver_bitmask);
		if (target != NULL)
		ioapic_inj_irq(ioapic, target, vector,
		trig_mode, delivery_mode);
		else
		ioapic_debug("null round robin: "
		"mask=%x vector=%x delivery_mode=%x",
		deliver_bitmask, vector, dest_LowestPrio);
		break;
		case dest_Fixed:
		for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
		if (!(deliver_bitmask & (1 << vcpu_id)))
		continue;
		deliver_bitmask &= ~(1 << vcpu_id);
		vcpu = ioapic->kvm->vcpus[vcpu_id];
		if (vcpu) {
		target = vcpu->apic;
		ioapic_inj_irq(ioapic, target, vector,
		trig_mode, delivery_mode);
		}
		}
		break;

		/* TODO: NMI */
		default:
		printk(KERN_WARNING "Unsupported delivery mode %d\n",
		delivery_mode);
		break;
		}
		}

		void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
		{
		u32 old_irr = ioapic->irr;
		u32 mask = 1 << irq;
		union ioapic_redir_entry entry;

		if (irq >= 0 && irq < IOAPIC_NUM_PINS) {
		entry = ioapic->redirtbl[irq];
		level ^= entry.fields.polarity;
		if (!level)
		ioapic->irr &= ~mask;
		else {
		ioapic->irr \|= mask;
		if ((!entry.fields.trig_mode && old_irr != ioapic->irr)
		\|\| !entry.fields.remote_irr)
		ioapic_service(ioapic, irq);
		}
		}
		}

		static int get_eoi_gsi(struct kvm_ioapic *ioapic, int vector)
		{
		int i;

		for (i = 0; i < IOAPIC_NUM_PINS; i++)
		if (ioapic->redirtbl[i].fields.vector == vector)
		return i;
		return -1;
		}

		void kvm_ioapic_update_eoi(struct kvm *kvm, int vector)
		{
		struct kvm_ioapic *ioapic = kvm->vioapic;
		union ioapic_redir_entry *ent;
		int gsi;

		gsi = get_eoi_gsi(ioapic, vector);
		if (gsi == -1) {
		printk(KERN_WARNING "Can't find redir item for %d EOI\n",
		vector);
		return;
		}

		ent = &ioapic->redirtbl[gsi];
		ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG);

		ent->fields.remote_irr = 0;
		if (!ent->fields.mask && (ioapic->irr & (1 << gsi)))
		ioapic_deliver(ioapic, gsi);
		}

		static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr)
		{
		struct kvm_ioapic ioapic = (struct kvm_ioapic )this->private;

		return ((addr >= ioapic->base_address &&
		(addr < ioapic->base_address + IOAPIC_MEM_LENGTH)));
		}

		static void ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len,
		void *val)
		{
		struct kvm_ioapic ioapic = (struct kvm_ioapic )this->private;
		u32 result;

		ioapic_debug("addr %lx", (unsigned long)addr);
		ASSERT(!(addr & 0xf)); /* check alignment */

		addr &= 0xff;
		switch (addr) {
		case IOAPIC_REG_SELECT:
		result = ioapic->ioregsel;
		break;

		case IOAPIC_REG_WINDOW:
		result = ioapic_read_indirect(ioapic, addr, len);
		break;

		default:
		result = 0;
		break;
		}
		switch (len) {
		case 8:
		(u64 ) val = result;
		break;
		case 1:
		case 2:
		case 4:
		memcpy(val, (char *)&result, len);
		break;
		default:
		printk(KERN_WARNING "ioapic: wrong length %d\n", len);
		}
		}

		static void ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len,
		const void *val)
		{
		struct kvm_ioapic ioapic = (struct kvm_ioapic )this->private;
		u32 data;

		ioapic_debug("ioapic_mmio_write addr=%lx len=%d val=%p\n",
		addr, len, val);
		ASSERT(!(addr & 0xf)); /* check alignment */
		if (len == 4 \|\| len == 8)
		data = (u32 ) val;
		else {
		printk(KERN_WARNING "ioapic: Unsupported size %d\n", len);
		return;
		}

		addr &= 0xff;
		switch (addr) {
		case IOAPIC_REG_SELECT:
		ioapic->ioregsel = data;
		break;

		case IOAPIC_REG_WINDOW:
		ioapic_write_indirect(ioapic, data);
		break;

		default:
		break;
		}
		}

		int kvm_ioapic_init(struct kvm *kvm)
		{
		struct kvm_ioapic *ioapic;
		int i;

		ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL);
		if (!ioapic)
		return -ENOMEM;
		kvm->vioapic = ioapic;
		for (i = 0; i < IOAPIC_NUM_PINS; i++)
		ioapic->redirtbl[i].fields.mask = 1;
		ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS;
		ioapic->dev.read = ioapic_mmio_read;
		ioapic->dev.write = ioapic_mmio_write;
		ioapic->dev.in_range = ioapic_in_range;
		ioapic->dev.private = ioapic;
		ioapic->kvm = kvm;
		kvm_io_bus_register_dev(&kvm->mmio_bus, &ioapic->dev);
		return 0;
		}

drivers/kvm/irq.c

0 → 100644

+98 −0

Original line number	Diff line number	Diff line
		/*
		* irq.c: API for in kernel interrupt controller
		* Copyright (c) 2007, Intel Corporation.
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms and conditions of the GNU General Public License,
		* version 2, as published by the Free Software Foundation.
		*
		* This program is distributed in the hope 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, Inc., 59 Temple
		* Place - Suite 330, Boston, MA 02111-1307 USA.
		* Authors:
		* Yaozu (Eddie) Dong <Eddie.dong@intel.com>
		*
		*/

		#include <linux/module.h>

		#include "kvm.h"
		#include "irq.h"

		/*
		* check if there is pending interrupt without
		* intack.
		*/
		int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
		{
		struct kvm_pic *s;

		if (kvm_apic_has_interrupt(v) == -1) { /* LAPIC */
		if (kvm_apic_accept_pic_intr(v)) {
		s = pic_irqchip(v->kvm); /* PIC */
		return s->output;
		} else
		return 0;
		}
		return 1;
		}
		EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt);

		/*
		* Read pending interrupt vector and intack.
		*/
		int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
		{
		struct kvm_pic *s;
		int vector;

		vector = kvm_get_apic_interrupt(v); /* APIC */
		if (vector == -1) {
		if (kvm_apic_accept_pic_intr(v)) {
		s = pic_irqchip(v->kvm);
		s->output = 0; /* PIC */
		vector = kvm_pic_read_irq(s);
		}
		}
		return vector;
		}
		EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);

		static void vcpu_kick_intr(void *info)
		{
		#ifdef DEBUG
		struct kvm_vcpu vcpu = (struct kvm_vcpu )info;
		printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu);
		#endif
		}

		void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
		{
		int ipi_pcpu = vcpu->cpu;

		if (waitqueue_active(&vcpu->wq)) {
		wake_up_interruptible(&vcpu->wq);
		++vcpu->stat.halt_wakeup;
		}
		if (vcpu->guest_mode)
		smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0);
		}

		void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
		{
		kvm_inject_apic_timer_irqs(vcpu);
		/* TODO: PIT, RTC etc. */
		}
		EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);

		void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec)
		{
		kvm_apic_timer_intr_post(vcpu, vec);
		/* TODO: PIT, RTC etc. */
		}
		EXPORT_SYMBOL_GPL(kvm_timer_intr_post);

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