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Subject[PATCH 013/104] KVM: Trivial: Use standard BITMAP macros, open-code userspace-exposed header
Date
From: Rusty Russell <rusty@rustcorp.com.au>

Creating one's own BITMAP macro seems suboptimal: if we use manual
arithmetic in the one place exposed to userspace, we can use standard
macros elsewhere.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Avi Kivity <avi@qumranet.com>
---
drivers/kvm/kvm.h | 3 +--
drivers/kvm/kvm_main.c | 2 +-
include/linux/kvm.h | 10 ++--------
3 files changed, 4 insertions(+), 11 deletions(-)
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index 25439a5..cec5f05 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -324,8 +324,7 @@ struct kvm_vcpu {
int guest_mode;
unsigned long requests;
unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
-#define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
- unsigned long irq_pending[NR_IRQ_WORDS];
+ DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
unsigned long rip; /* needs vcpu_load_rsp_rip() */

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index af02320..fc63de2 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -2130,7 +2130,7 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
sizeof vcpu->irq_pending);
vcpu->irq_summary = 0;
- for (i = 0; i < NR_IRQ_WORDS; ++i)
+ for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
if (vcpu->irq_pending[i])
__set_bit(i, &vcpu->irq_summary);

diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 68ecced..8db01a9 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -12,14 +12,8 @@

#define KVM_API_VERSION 12

-/*
- * Architectural interrupt line count, and the size of the bitmap needed
- * to hold them.
- */
+/* Architectural interrupt line count. */
#define KVM_NR_INTERRUPTS 256
-#define KVM_IRQ_BITMAP_SIZE_BYTES ((KVM_NR_INTERRUPTS + 7) / 8)
-#define KVM_IRQ_BITMAP_SIZE(type) (KVM_IRQ_BITMAP_SIZE_BYTES / sizeof(type))
-

/* for KVM_CREATE_MEMORY_REGION */
struct kvm_memory_region {
@@ -165,7 +159,7 @@ struct kvm_sregs {
__u64 cr0, cr2, cr3, cr4, cr8;
__u64 efer;
__u64 apic_base;
- __u64 interrupt_bitmap[KVM_IRQ_BITMAP_SIZE(__u64)];
+ __u64 interrupt_bitmap[(KVM_NR_INTERRUPTS + 63) / 64];
};

struct kvm_msr_entry {
--
1.5.3
-
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