Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757487AbYFZMdZ (ORCPT ); Thu, 26 Jun 2008 08:33:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753189AbYFZM2y (ORCPT ); Thu, 26 Jun 2008 08:28:54 -0400 Received: from il.qumranet.com ([212.179.150.194]:32377 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752359AbYFZM2m (ORCPT ); Thu, 26 Jun 2008 08:28:42 -0400 From: Avi Kivity To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Laurent Vivier Subject: [PATCH 33/50] KVM: kvm_io_device: extend in_range() to manage len and write attribute Date: Thu, 26 Jun 2008 15:28:15 +0300 Message-Id: <1214483312-9265-34-git-send-email-avi@qumranet.com> X-Mailer: git-send-email 1.5.6 In-Reply-To: <1214483312-9265-1-git-send-email-avi@qumranet.com> References: <1214483312-9265-1-git-send-email-avi@qumranet.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 9172 Lines: 276 From: Laurent Vivier 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 Signed-off-by: Avi Kivity --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/