From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763992AbYDCToM (ORCPT ); Thu, 3 Apr 2008 15:44:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760270AbYDCTdb (ORCPT ); Thu, 3 Apr 2008 15:33:31 -0400 Received: from bzq-179-150-194.static.bezeqint.net ([212.179.150.194]:53036 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757514AbYDCTc7 (ORCPT ); Thu, 3 Apr 2008 15:32:59 -0400 From: Avi Kivity To: kvm-devel@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org, Sheng Yang Subject: [PATCH 16/35] KVM: Add save/restore supporting of in kernel PIT Date: Thu, 3 Apr 2008 22:32:31 +0300 Message-Id: <1207251170-5013-17-git-send-email-avi@qumranet.com> X-Mailer: git-send-email 1.5.4.5 In-Reply-To: <1207251170-5013-1-git-send-email-avi@qumranet.com> References: <1207251170-5013-1-git-send-email-avi@qumranet.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sheng Yang Signed-off-by: Sheng Yang Signed-off-by: Avi Kivity --- arch/x86/kvm/i8254.c | 7 +++++++ arch/x86/kvm/i8254.h | 1 + arch/x86/kvm/x86.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ include/asm-x86/kvm.h | 21 +++++++++++++++++++++ include/linux/kvm.h | 2 ++ 5 files changed, 79 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c index 1031901..7776f50 100644 --- a/arch/x86/kvm/i8254.c +++ b/arch/x86/kvm/i8254.c @@ -286,6 +286,13 @@ static void pit_load_count(struct kvm *kvm, int channel, u32 val) } } +void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val) +{ + mutex_lock(&kvm->arch.vpit->pit_state.lock); + pit_load_count(kvm, channel, val); + mutex_unlock(&kvm->arch.vpit->pit_state.lock); +} + static void pit_ioport_write(struct kvm_io_device *this, gpa_t addr, int len, const void *data) { diff --git a/arch/x86/kvm/i8254.h b/arch/x86/kvm/i8254.h index 38184d5..586bbf0 100644 --- a/arch/x86/kvm/i8254.h +++ b/arch/x86/kvm/i8254.h @@ -54,6 +54,7 @@ struct kvm_pit { void kvm_inject_pit_timer_irqs(struct kvm_vcpu *vcpu); void kvm_pit_timer_intr_post(struct kvm_vcpu *vcpu, int vec); +void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val); struct kvm_pit *kvm_create_pit(struct kvm *kvm); void kvm_free_pit(struct kvm *kvm); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index c33a457..621a8e3 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1504,6 +1504,23 @@ static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) return r; } +static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) +{ + int r = 0; + + memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); + return r; +} + +static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) +{ + int r = 0; + + memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); + kvm_pit_load_count(kvm, 0, ps->channels[0].count); + return r; +} + /* * Get (and clear) the dirty memory log for a memory slot. */ @@ -1657,6 +1674,37 @@ long kvm_arch_vm_ioctl(struct file *filp, r = 0; break; } + case KVM_GET_PIT: { + struct kvm_pit_state ps; + r = -EFAULT; + if (copy_from_user(&ps, argp, sizeof ps)) + goto out; + r = -ENXIO; + if (!kvm->arch.vpit) + goto out; + r = kvm_vm_ioctl_get_pit(kvm, &ps); + if (r) + goto out; + r = -EFAULT; + if (copy_to_user(argp, &ps, sizeof ps)) + goto out; + r = 0; + break; + } + case KVM_SET_PIT: { + struct kvm_pit_state ps; + r = -EFAULT; + if (copy_from_user(&ps, argp, sizeof ps)) + goto out; + r = -ENXIO; + if (!kvm->arch.vpit) + goto out; + r = kvm_vm_ioctl_set_pit(kvm, &ps); + if (r) + goto out; + r = 0; + break; + } default: ; } diff --git a/include/asm-x86/kvm.h b/include/asm-x86/kvm.h index 7a71120..12b4b25 100644 --- a/include/asm-x86/kvm.h +++ b/include/asm-x86/kvm.h @@ -188,4 +188,25 @@ struct kvm_cpuid2 { struct kvm_cpuid_entry2 entries[0]; }; +/* for KVM_GET_PIT and KVM_SET_PIT */ +struct kvm_pit_channel_state { + __u32 count; /* can be 65536 */ + __u16 latched_count; + __u8 count_latched; + __u8 status_latched; + __u8 status; + __u8 read_state; + __u8 write_state; + __u8 write_latch; + __u8 rw_mode; + __u8 mode; + __u8 bcd; + __u8 gate; + __s64 count_load_time; +}; + +struct kvm_pit_state { + struct kvm_pit_channel_state channels[3]; +}; + #endif diff --git a/include/linux/kvm.h b/include/linux/kvm.h index cefa9a2..a2f3274 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -260,6 +260,8 @@ struct kvm_vapic_addr { #define KVM_GET_IRQCHIP _IOWR(KVMIO, 0x62, struct kvm_irqchip) #define KVM_SET_IRQCHIP _IOR(KVMIO, 0x63, struct kvm_irqchip) #define KVM_CREATE_PIT _IO(KVMIO, 0x64) +#define KVM_GET_PIT _IOWR(KVMIO, 0x65, struct kvm_pit_state) +#define KVM_SET_PIT _IOR(KVMIO, 0x66, struct kvm_pit_state) /* * ioctls for vcpu fds -- 1.5.4.5