| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20061127124138.BA36825015E@cleopatra.q>
Date: Mon, 27 Nov 2006 12:41:38 -0000
From: Avi Kivity <avi@...ranet.com>
To: kvm-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org, akpm@...l.org
Subject: [PATCH 31/38] KVM: Make vcpu creation and destruction arch operations
Signed-off-by: Avi Kivity <avi@...ranet.com>
Index: linux-2.6/drivers/kvm/kvm.h
===================================================================
--- linux-2.6.orig/drivers/kvm/kvm.h
+++ linux-2.6/drivers/kvm/kvm.h
@@ -260,6 +260,9 @@ struct kvm_arch_ops {
int (*hardware_setup)(void); /* __init */
void (*hardware_unsetup)(void); /* __exit */
+ int (*vcpu_create)(struct kvm_vcpu *vcpu);
+ void (*vcpu_free)(struct kvm_vcpu *vcpu);
+
struct kvm_vcpu *(*vcpu_load)(struct kvm_vcpu *vcpu);
void (*vcpu_put)(struct kvm_vcpu *vcpu);
@@ -299,8 +302,6 @@ struct kvm_arch_ops {
void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
};
-void __vcpu_clear(void *arg); /* temporary hack */
-
extern struct kvm_stat kvm_stat;
extern struct kvm_arch_ops *kvm_arch_ops;
Index: linux-2.6/drivers/kvm/kvm_main.c
===================================================================
--- linux-2.6.orig/drivers/kvm/kvm_main.c
+++ linux-2.6/drivers/kvm/kvm_main.c
@@ -219,31 +219,6 @@ int kvm_write_guest(struct kvm_vcpu *vcp
}
EXPORT_SYMBOL_GPL(kvm_write_guest);
-static void vmcs_clear(struct vmcs *vmcs)
-{
- u64 phys_addr = __pa(vmcs);
- u8 error;
-
- asm volatile (ASM_VMX_VMCLEAR_RAX "; setna %0"
- : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
- : "cc", "memory");
- if (error)
- printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
- vmcs, phys_addr);
-}
-
-void __vcpu_clear(void *arg)
-{
- struct kvm_vcpu *vcpu = arg;
- int cpu = smp_processor_id();
-
- if (vcpu->cpu == cpu)
- vmcs_clear(vcpu->vmcs);
- if (per_cpu(current_vmcs, cpu) == vcpu->vmcs)
- per_cpu(current_vmcs, cpu) = 0;
-}
-EXPORT_SYMBOL_GPL(__vcpu_clear);
-
static int vcpu_slot(struct kvm_vcpu *vcpu)
{
return vcpu - vcpu->kvm->vcpus;
@@ -271,33 +246,6 @@ static void vcpu_put(struct kvm_vcpu *vc
mutex_unlock(&vcpu->mutex);
}
-struct vmcs *alloc_vmcs_cpu(int cpu)
-{
- int node = cpu_to_node(cpu);
- struct page *pages;
- struct vmcs *vmcs;
-
- pages = alloc_pages_node(node, GFP_KERNEL, vmcs_descriptor.order);
- if (!pages)
- return 0;
- vmcs = page_address(pages);
- memset(vmcs, 0, vmcs_descriptor.size);
- vmcs->revision_id = vmcs_descriptor.revision_id; /* vmcs revision id */
- return vmcs;
-}
-EXPORT_SYMBOL_GPL(alloc_vmcs_cpu);
-
-static struct vmcs *alloc_vmcs(void)
-{
- return alloc_vmcs_cpu(smp_processor_id());
-}
-
-void free_vmcs(struct vmcs *vmcs)
-{
- free_pages((unsigned long)vmcs, vmcs_descriptor.order);
-}
-EXPORT_SYMBOL_GPL(free_vmcs);
-
static int kvm_dev_open(struct inode *inode, struct file *filp)
{
struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
@@ -350,18 +298,9 @@ static void kvm_free_physmem(struct kvm
kvm_free_physmem_slot(&kvm->memslots[i], 0);
}
-static void kvm_free_vmcs(struct kvm_vcpu *vcpu)
-{
- if (vcpu->vmcs) {
- on_each_cpu(__vcpu_clear, vcpu, 0, 1);
- free_vmcs(vcpu->vmcs);
- vcpu->vmcs = 0;
- }
-}
-
static void kvm_free_vcpu(struct kvm_vcpu *vcpu)
{
- kvm_free_vmcs(vcpu);
+ kvm_arch_ops->vcpu_free(vcpu);
kvm_mmu_destroy(vcpu);
}
@@ -613,7 +552,6 @@ static int kvm_dev_ioctl_create_vcpu(str
{
int r;
struct kvm_vcpu *vcpu;
- struct vmcs *vmcs;
r = -EINVAL;
if (n < 0 || n >= KVM_MAX_VCPUS)
@@ -634,14 +572,9 @@ static int kvm_dev_ioctl_create_vcpu(str
vcpu->cpu = -1; /* First load will set up TR */
vcpu->kvm = kvm;
- vmcs = alloc_vmcs();
- if (!vmcs) {
- mutex_unlock(&vcpu->mutex);
+ r = kvm_arch_ops->vcpu_create(vcpu);
+ if (r < 0)
goto out_free_vcpus;
- }
- vmcs_clear(vmcs);
- vcpu->vmcs = vmcs;
- vcpu->launched = 0;
kvm_arch_ops->vcpu_load(vcpu);
@@ -658,6 +591,7 @@ static int kvm_dev_ioctl_create_vcpu(str
out_free_vcpus:
kvm_free_vcpu(vcpu);
+ mutex_unlock(&vcpu->mutex);
out:
return r;
}
Index: linux-2.6/drivers/kvm/vmx.c
===================================================================
--- linux-2.6.orig/drivers/kvm/vmx.c
+++ linux-2.6/drivers/kvm/vmx.c
@@ -77,6 +77,30 @@ static const u32 vmx_msr_index[] = {
struct vmx_msr_entry *find_msr_entry(struct kvm_vcpu *vcpu, u32 msr);
+static void vmcs_clear(struct vmcs *vmcs)
+{
+ u64 phys_addr = __pa(vmcs);
+ u8 error;
+
+ asm volatile (ASM_VMX_VMCLEAR_RAX "; setna %0"
+ : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
+ : "cc", "memory");
+ if (error)
+ printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
+ vmcs, phys_addr);
+}
+
+static void __vcpu_clear(void *arg)
+{
+ struct kvm_vcpu *vcpu = arg;
+ int cpu = smp_processor_id();
+
+ if (vcpu->cpu == cpu)
+ vmcs_clear(vcpu->vmcs);
+ if (per_cpu(current_vmcs, cpu) == vcpu->vmcs)
+ per_cpu(current_vmcs, cpu) = 0;
+}
+
/*
* Switches to specified vcpu, until a matching vcpu_put(), but assumes
* vcpu mutex is already taken.
@@ -449,7 +473,30 @@ static __init void setup_vmcs_descriptor
vmcs_descriptor.revision_id = vmx_msr_low;
};
-void free_vmcs(struct vmcs *vmcs);
+static struct vmcs *alloc_vmcs_cpu(int cpu)
+{
+ int node = cpu_to_node(cpu);
+ struct page *pages;
+ struct vmcs *vmcs;
+
+ pages = alloc_pages_node(node, GFP_KERNEL, vmcs_descriptor.order);
+ if (!pages)
+ return 0;
+ vmcs = page_address(pages);
+ memset(vmcs, 0, vmcs_descriptor.size);
+ vmcs->revision_id = vmcs_descriptor.revision_id; /* vmcs revision id */
+ return vmcs;
+}
+
+static struct vmcs *alloc_vmcs(void)
+{
+ return alloc_vmcs_cpu(smp_processor_id());
+}
+
+static void free_vmcs(struct vmcs *vmcs)
+{
+ free_pages((unsigned long)vmcs, vmcs_descriptor.order);
+}
static __exit void free_kvm_area(void)
{
@@ -1790,6 +1837,33 @@ static void vmx_inject_page_fault(struct
}
+static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->vmcs) {
+ on_each_cpu(__vcpu_clear, vcpu, 0, 1);
+ free_vmcs(vcpu->vmcs);
+ vcpu->vmcs = 0;
+ }
+}
+
+static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
+{
+ vmx_free_vmcs(vcpu);
+}
+
+static int vmx_create_vcpu(struct kvm_vcpu *vcpu)
+{
+ struct vmcs *vmcs;
+
+ vmcs = alloc_vmcs();
+ if (!vmcs)
+ return -ENOMEM;
+ vmcs_clear(vmcs);
+ vcpu->vmcs = vmcs;
+ vcpu->launched = 0;
+ return 0;
+}
+
static struct kvm_arch_ops vmx_arch_ops = {
.cpu_has_kvm_support = cpu_has_kvm_support,
.disabled_by_bios = vmx_disabled_by_bios,
@@ -1798,6 +1872,9 @@ static struct kvm_arch_ops vmx_arch_ops
.hardware_enable = hardware_enable,
.hardware_disable = hardware_disable,
+ .vcpu_create = vmx_create_vcpu,
+ .vcpu_free = vmx_free_vcpu,
+
.vcpu_load = vmx_vcpu_load,
.vcpu_put = vmx_vcpu_put,
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists