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kvm: make KVM_COALESCED_MMIO_PAGE_OFFSET public 

Its value has never changed; we might as well make it part of the ABI instead
of using the return value of KVM_CHECK_EXTENSION(KVM_CAP_COALESCED_MMIO).

Because PPC does not always make MMIO available, the code has to be made
dependent on CONFIG_KVM_MMIO rather than KVM_COALESCED_MMIO_PAGE_OFFSET.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-03-31 13:53:23 +02:00 committed by Radim Krčmář
parent 3042255899
commit 4b4357e025
12 changed files with 18 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/include/asm/kvm_host.h
View File

@ -30,7 +30,6 @@
#define __KVM_HAVE_ARCH_INTC_INITIALIZED
#define KVM_USER_MEM_SLOTS 32
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#define KVM_HAVE_ONE_REG
#define KVM_HALT_POLL_NS_DEFAULT 500000

2
arch/arm/include/uapi/asm/kvm.h
View File

@ -27,6 +27,8 @@
#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_READONLY_MEM
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#define KVM_REG_SIZE(id) \
(1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))

1
arch/arm64/include/asm/kvm_host.h
View File

@ -31,7 +31,6 @@
#define __KVM_HAVE_ARCH_INTC_INITIALIZED
#define KVM_USER_MEM_SLOTS 512
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#define KVM_HALT_POLL_NS_DEFAULT 500000
#include <kvm/arm_vgic.h>

2
arch/arm64/include/uapi/asm/kvm.h
View File

@ -39,6 +39,8 @@
#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_READONLY_MEM
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#define KVM_REG_SIZE(id) \
(1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))

1
arch/mips/include/asm/kvm_host.h
View File

@ -83,7 +83,6 @@
/* memory slots that does not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 0
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#define KVM_HALT_POLL_NS_DEFAULT 500000
#ifdef CONFIG_KVM_MIPS_VZ

2
arch/mips/include/uapi/asm/kvm.h
View File

@ -21,6 +21,8 @@
#define __KVM_HAVE_READONLY_MEM
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
/*
* for KVM_GET_REGS and KVM_SET_REGS
*

3
arch/powerpc/include/asm/kvm_host.h
View File

@ -45,9 +45,6 @@
#define __KVM_HAVE_ARCH_INTC_INITIALIZED
#ifdef CONFIG_KVM_MMIO
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#endif
#define KVM_HALT_POLL_NS_DEFAULT 10000 /* 10 us */
/* These values are internal and can be increased later */

3
arch/powerpc/include/uapi/asm/kvm.h
View File

@ -29,6 +29,9 @@
#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_GUEST_DEBUG
/* Not always available, but if it is, this is the correct offset. */
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
struct kvm_regs {
__u64 pc;
__u64 cr;

2
arch/x86/include/asm/kvm_host.h
View File

@ -43,8 +43,6 @@
#define KVM_PRIVATE_MEM_SLOTS 3
#define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
#define KVM_PIO_PAGE_OFFSET 1
#define KVM_COALESCED_MMIO_PAGE_OFFSET 2
#define KVM_HALT_POLL_NS_DEFAULT 400000
#define KVM_IRQCHIP_NUM_PINS KVM_IOAPIC_NUM_PINS

3
arch/x86/include/uapi/asm/kvm.h
View File

@ -9,6 +9,9 @@
#include <linux/types.h>
#include <linux/ioctl.h>
#define KVM_PIO_PAGE_OFFSET 1
#define KVM_COALESCED_MMIO_PAGE_OFFSET 2
#define DE_VECTOR 0
#define DB_VECTOR 1
#define BP_VECTOR 3

2
include/linux/kvm_host.h
View File

@ -403,7 +403,7 @@ struct kvm {
struct kvm_vm_stat stat;
struct kvm_arch arch;
refcount_t users_count;
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
#ifdef CONFIG_KVM_MMIO
struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
spinlock_t ring_lock;
struct list_head coalesced_zones;

10
virt/kvm/kvm_main.c
View File

@ -2349,7 +2349,7 @@ static int kvm_vcpu_fault(struct vm_fault *vmf)
else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET)
page = virt_to_page(vcpu->arch.pio_data);
#endif
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
#ifdef CONFIG_KVM_MMIO
else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET)
page = virt_to_page(vcpu->kvm->coalesced_mmio_ring);
#endif
@ -2918,7 +2918,7 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
case KVM_CAP_IOEVENTFD_ANY_LENGTH:
case KVM_CAP_CHECK_EXTENSION_VM:
return 1;
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
#ifdef CONFIG_KVM_MMIO
case KVM_CAP_COALESCED_MMIO:
return KVM_COALESCED_MMIO_PAGE_OFFSET;
#endif
@ -2971,7 +2971,7 @@ static long kvm_vm_ioctl(struct file *filp,
r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
break;
}
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
#ifdef CONFIG_KVM_MMIO
case KVM_REGISTER_COALESCED_MMIO: {
struct kvm_coalesced_mmio_zone zone;
@ -3163,7 +3163,7 @@ static int kvm_dev_ioctl_create_vm(unsigned long type)
kvm = kvm_create_vm(type);
if (IS_ERR(kvm))
return PTR_ERR(kvm);
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
#ifdef CONFIG_KVM_MMIO
r = kvm_coalesced_mmio_init(kvm);
if (r < 0) {
kvm_put_kvm(kvm);
@ -3216,7 +3216,7 @@ static long kvm_dev_ioctl(struct file *filp,
#ifdef CONFIG_X86
r += PAGE_SIZE; /* pio data page */
#endif
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
#ifdef CONFIG_KVM_MMIO
r += PAGE_SIZE; /* coalesced mmio ring page */
#endif
break;