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Message-Id: <1543405379-21910-2-git-send-email-pbonzini@redhat.com>
Date: Wed, 28 Nov 2018 12:42:57 +0100
From: Paolo Bonzini <pbonzini@...hat.com>
To: linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: [PATCH 1/3] kvm: make KVM_CAP_ENABLE_CAP_VM architecture agnostic
The first such capability to be handled in virt/kvm/ will be manual
dirty page reprotection.
Reviewed-by: Cornelia Huck <cohuck@...hat.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
Documentation/virtual/kvm/api.txt | 13 +++++++++----
arch/powerpc/kvm/powerpc.c | 14 ++------------
arch/s390/kvm/kvm-s390.c | 11 +----------
arch/x86/kvm/x86.c | 14 ++------------
include/linux/kvm_host.h | 2 ++
virt/kvm/kvm_main.c | 25 +++++++++++++++++++++++++
6 files changed, 41 insertions(+), 38 deletions(-)
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index cd209f7730af..1071c10cf1c7 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -1129,10 +1129,15 @@ documentation when it pops into existence).
4.37 KVM_ENABLE_CAP
-Capability: KVM_CAP_ENABLE_CAP, KVM_CAP_ENABLE_CAP_VM
-Architectures: x86 (only KVM_CAP_ENABLE_CAP_VM),
- mips (only KVM_CAP_ENABLE_CAP), ppc, s390
-Type: vcpu ioctl, vm ioctl (with KVM_CAP_ENABLE_CAP_VM)
+Capability: KVM_CAP_ENABLE_CAP
+Architectures: mips, ppc, s390
+Type: vcpu ioctl
+Parameters: struct kvm_enable_cap (in)
+Returns: 0 on success; -1 on error
+
+Capability: KVM_CAP_ENABLE_CAP_VM
+Architectures: all
+Type: vcpu ioctl
Parameters: struct kvm_enable_cap (in)
Returns: 0 on success; -1 on error
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 2869a299c4ed..b1ed31a17a8c 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -518,7 +518,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_PPC_UNSET_IRQ:
case KVM_CAP_PPC_IRQ_LEVEL:
case KVM_CAP_ENABLE_CAP:
- case KVM_CAP_ENABLE_CAP_VM:
case KVM_CAP_ONE_REG:
case KVM_CAP_IOEVENTFD:
case KVM_CAP_DEVICE_CTRL:
@@ -2084,8 +2083,8 @@ int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
}
-static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
- struct kvm_enable_cap *cap)
+int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
+ struct kvm_enable_cap *cap)
{
int r;
@@ -2273,15 +2272,6 @@ long kvm_arch_vm_ioctl(struct file *filp,
break;
}
- case KVM_ENABLE_CAP:
- {
- struct kvm_enable_cap cap;
- r = -EFAULT;
- if (copy_from_user(&cap, argp, sizeof(cap)))
- goto out;
- r = kvm_vm_ioctl_enable_cap(kvm, &cap);
- break;
- }
#ifdef CONFIG_SPAPR_TCE_IOMMU
case KVM_CREATE_SPAPR_TCE_64: {
struct kvm_create_spapr_tce_64 create_tce_64;
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index fe24150ff666..16c300bdf2c8 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -464,7 +464,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_S390_CSS_SUPPORT:
case KVM_CAP_IOEVENTFD:
case KVM_CAP_DEVICE_CTRL:
- case KVM_CAP_ENABLE_CAP_VM:
case KVM_CAP_S390_IRQCHIP:
case KVM_CAP_VM_ATTRIBUTES:
case KVM_CAP_MP_STATE:
@@ -607,7 +606,7 @@ static void icpt_operexc_on_all_vcpus(struct kvm *kvm)
}
}
-static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
+int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
{
int r;
@@ -1933,14 +1932,6 @@ long kvm_arch_vm_ioctl(struct file *filp,
r = kvm_s390_inject_vm(kvm, &s390int);
break;
}
- case KVM_ENABLE_CAP: {
- struct kvm_enable_cap cap;
- r = -EFAULT;
- if (copy_from_user(&cap, argp, sizeof(cap)))
- break;
- r = kvm_vm_ioctl_enable_cap(kvm, &cap);
- break;
- }
case KVM_CREATE_IRQCHIP: {
struct kvm_irq_routing_entry routing;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index d02937760c3b..714c5eb0c3bd 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3008,7 +3008,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_HYPERV_TIME:
case KVM_CAP_IOAPIC_POLARITY_IGNORED:
case KVM_CAP_TSC_DEADLINE_TIMER:
- case KVM_CAP_ENABLE_CAP_VM:
case KVM_CAP_DISABLE_QUIRKS:
case KVM_CAP_SET_BOOT_CPU_ID:
case KVM_CAP_SPLIT_IRQCHIP:
@@ -4431,8 +4430,8 @@ int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
return 0;
}
-static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
- struct kvm_enable_cap *cap)
+int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
+ struct kvm_enable_cap *cap)
{
int r;
@@ -4765,15 +4764,6 @@ long kvm_arch_vm_ioctl(struct file *filp,
r = 0;
break;
}
- case KVM_ENABLE_CAP: {
- struct kvm_enable_cap cap;
-
- r = -EFAULT;
- if (copy_from_user(&cap, argp, sizeof(cap)))
- goto out;
- r = kvm_vm_ioctl_enable_cap(kvm, &cap);
- break;
- }
case KVM_MEMORY_ENCRYPT_OP: {
r = -ENOTTY;
if (kvm_x86_ops->mem_enc_op)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index c926698040e0..54cc06dd7e6c 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -765,6 +765,8 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
bool line_status);
+int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
+ struct kvm_enable_cap *cap);
long kvm_arch_vm_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2679e476b6c3..1d6b77162d7c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2948,6 +2948,7 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
#endif
case KVM_CAP_IOEVENTFD_ANY_LENGTH:
case KVM_CAP_CHECK_EXTENSION_VM:
+ case KVM_CAP_ENABLE_CAP_VM:
return 1;
#ifdef CONFIG_KVM_MMIO
case KVM_CAP_COALESCED_MMIO:
@@ -2971,6 +2972,21 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
return kvm_vm_ioctl_check_extension(kvm, arg);
}
+int __attribute__((weak)) kvm_vm_ioctl_enable_cap(struct kvm *kvm,
+ struct kvm_enable_cap *cap)
+{
+ return -EINVAL;
+}
+
+static int kvm_vm_ioctl_enable_cap_generic(struct kvm *kvm,
+ struct kvm_enable_cap *cap)
+{
+ switch (cap->cap) {
+ default:
+ return kvm_vm_ioctl_enable_cap(kvm, cap);
+ }
+}
+
static long kvm_vm_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
@@ -2984,6 +3000,15 @@ static long kvm_vm_ioctl(struct file *filp,
case KVM_CREATE_VCPU:
r = kvm_vm_ioctl_create_vcpu(kvm, arg);
break;
+ case KVM_ENABLE_CAP: {
+ struct kvm_enable_cap cap;
+
+ r = -EFAULT;
+ if (copy_from_user(&cap, argp, sizeof(cap)))
+ goto out;
+ r = kvm_vm_ioctl_enable_cap_generic(kvm, &cap);
+ break;
+ }
case KVM_SET_USER_MEMORY_REGION: {
struct kvm_userspace_memory_region kvm_userspace_mem;
--
1.8.3.1
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