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Date: Thu, 26 Jun 2008 15:28:15 +0300
From: Avi Kivity <avi@...ranet.com>
To: kvm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Laurent Vivier <Laurent.Vivier@...l.net>
Subject: [PATCH 33/50] KVM: kvm_io_device: extend in_range() to manage len and write attribute
From: Laurent Vivier <Laurent.Vivier@...l.net>
Modify member in_range() of structure kvm_io_device to pass length and the type
of the I/O (write or read).
This modification allows to use kvm_io_device with coalesced MMIO.
Signed-off-by: Laurent Vivier <Laurent.Vivier@...l.net>
Signed-off-by: Avi Kivity <avi@...ranet.com>
---
arch/ia64/kvm/kvm-ia64.c | 6 +++---
arch/x86/kvm/i8254.c | 6 ++++--
arch/x86/kvm/i8259.c | 3 ++-
arch/x86/kvm/lapic.c | 3 ++-
arch/x86/kvm/x86.c | 28 +++++++++++++++++-----------
include/linux/kvm_host.h | 3 ++-
virt/kvm/ioapic.c | 3 ++-
virt/kvm/iodev.h | 8 +++++---
virt/kvm/kvm_main.c | 5 +++--
9 files changed, 40 insertions(+), 25 deletions(-)
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index adb74f7..b59231b 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -195,11 +195,11 @@ int kvm_dev_ioctl_check_extension(long ext)
}
static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
+ gpa_t addr, int len, int is_write)
{
struct kvm_io_device *dev;
- dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
+ dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, is_write);
return dev;
}
@@ -231,7 +231,7 @@ static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
kvm_run->exit_reason = KVM_EXIT_MMIO;
return 0;
mmio:
- mmio_dev = vcpu_find_mmio_dev(vcpu, p->addr);
+ mmio_dev = vcpu_find_mmio_dev(vcpu, p->addr, p->size, !p->dir);
if (mmio_dev) {
if (!p->dir)
kvm_iodevice_write(mmio_dev, p->addr, p->size,
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 60074dc..9e3391e 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -460,7 +460,8 @@ static void pit_ioport_read(struct kvm_io_device *this,
mutex_unlock(&pit_state->lock);
}
-static int pit_in_range(struct kvm_io_device *this, gpa_t addr)
+static int pit_in_range(struct kvm_io_device *this, gpa_t addr,
+ int len, int is_write)
{
return ((addr >= KVM_PIT_BASE_ADDRESS) &&
(addr < KVM_PIT_BASE_ADDRESS + KVM_PIT_MEM_LENGTH));
@@ -501,7 +502,8 @@ static void speaker_ioport_read(struct kvm_io_device *this,
mutex_unlock(&pit_state->lock);
}
-static int speaker_in_range(struct kvm_io_device *this, gpa_t addr)
+static int speaker_in_range(struct kvm_io_device *this, gpa_t addr,
+ int len, int is_write)
{
return (addr == KVM_SPEAKER_BASE_ADDRESS);
}
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index ab29cf2..5857f59 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -346,7 +346,8 @@ static u32 elcr_ioport_read(void *opaque, u32 addr1)
return s->elcr;
}
-static int picdev_in_range(struct kvm_io_device *this, gpa_t addr)
+static int picdev_in_range(struct kvm_io_device *this, gpa_t addr,
+ int len, int is_write)
{
switch (addr) {
case 0x20:
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index e48d193..180ba73 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -785,7 +785,8 @@ static void apic_mmio_write(struct kvm_io_device *this,
}
-static int apic_mmio_range(struct kvm_io_device *this, gpa_t addr)
+static int apic_mmio_range(struct kvm_io_device *this, gpa_t addr,
+ int len, int size)
{
struct kvm_lapic *apic = (struct kvm_lapic *)this->private;
int ret = 0;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 51810d8..00333b6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1797,13 +1797,14 @@ static void kvm_init_msr_list(void)
* Only apic need an MMIO device hook, so shortcut now..
*/
static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
+ gpa_t addr, int len,
+ int is_write)
{
struct kvm_io_device *dev;
if (vcpu->arch.apic) {
dev = &vcpu->arch.apic->dev;
- if (dev->in_range(dev, addr))
+ if (dev->in_range(dev, addr, len, is_write))
return dev;
}
return NULL;
@@ -1811,13 +1812,15 @@ static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
+ gpa_t addr, int len,
+ int is_write)
{
struct kvm_io_device *dev;
- dev = vcpu_find_pervcpu_dev(vcpu, addr);
+ dev = vcpu_find_pervcpu_dev(vcpu, addr, len, is_write);
if (dev == NULL)
- dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
+ dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len,
+ is_write);
return dev;
}
@@ -1885,7 +1888,7 @@ mmio:
* Is this MMIO handled locally?
*/
mutex_lock(&vcpu->kvm->lock);
- mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
+ mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 0);
if (mmio_dev) {
kvm_iodevice_read(mmio_dev, gpa, bytes, val);
mutex_unlock(&vcpu->kvm->lock);
@@ -1940,7 +1943,7 @@ mmio:
* Is this MMIO handled locally?
*/
mutex_lock(&vcpu->kvm->lock);
- mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
+ mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 1);
if (mmio_dev) {
kvm_iodevice_write(mmio_dev, gpa, bytes, val);
mutex_unlock(&vcpu->kvm->lock);
@@ -2317,9 +2320,10 @@ static void pio_string_write(struct kvm_io_device *pio_dev,
}
static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
+ gpa_t addr, int len,
+ int is_write)
{
- return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
+ return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr, len, is_write);
}
int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
@@ -2351,7 +2355,7 @@ int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
kvm_x86_ops->skip_emulated_instruction(vcpu);
- pio_dev = vcpu_find_pio_dev(vcpu, port);
+ pio_dev = vcpu_find_pio_dev(vcpu, port, size, !in);
if (pio_dev) {
kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data);
complete_pio(vcpu);
@@ -2433,7 +2437,9 @@ int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
}
}
- pio_dev = vcpu_find_pio_dev(vcpu, port);
+ pio_dev = vcpu_find_pio_dev(vcpu, port,
+ vcpu->arch.pio.cur_count,
+ !vcpu->arch.pio.in);
if (!vcpu->arch.pio.in) {
/* string PIO write */
ret = pio_copy_data(vcpu);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 865dcbc..499ff06 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -52,7 +52,8 @@ struct kvm_io_bus {
void kvm_io_bus_init(struct kvm_io_bus *bus);
void kvm_io_bus_destroy(struct kvm_io_bus *bus);
-struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
+struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
+ gpa_t addr, int len, int is_write);
void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
struct kvm_io_device *dev);
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index cb8a20b..9d02136 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -307,7 +307,8 @@ void kvm_ioapic_update_eoi(struct kvm *kvm, int vector)
__kvm_ioapic_update_eoi(ioapic, i);
}
-static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr)
+static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr,
+ int len, int is_write)
{
struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private;
diff --git a/virt/kvm/iodev.h b/virt/kvm/iodev.h
index c14e642..55e8846 100644
--- a/virt/kvm/iodev.h
+++ b/virt/kvm/iodev.h
@@ -27,7 +27,8 @@ struct kvm_io_device {
gpa_t addr,
int len,
const void *val);
- int (*in_range)(struct kvm_io_device *this, gpa_t addr);
+ int (*in_range)(struct kvm_io_device *this, gpa_t addr, int len,
+ int is_write);
void (*destructor)(struct kvm_io_device *this);
void *private;
@@ -49,9 +50,10 @@ static inline void kvm_iodevice_write(struct kvm_io_device *dev,
dev->write(dev, addr, len, val);
}
-static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
+static inline int kvm_iodevice_inrange(struct kvm_io_device *dev,
+ gpa_t addr, int len, int is_write)
{
- return dev->in_range(dev, addr);
+ return dev->in_range(dev, addr, len, is_write);
}
static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index e8f9fda..d602700 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1350,14 +1350,15 @@ void kvm_io_bus_destroy(struct kvm_io_bus *bus)
}
}
-struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
+struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
+ gpa_t addr, int len, int is_write)
{
int i;
for (i = 0; i < bus->dev_count; i++) {
struct kvm_io_device *pos = bus->devs[i];
- if (pos->in_range(pos, addr))
+ if (pos->in_range(pos, addr, len, is_write))
return pos;
}
--
1.5.6
--
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