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[PATCH 013/104] KVM: Trivial: Use standard BITMAP macros, open-code userspace-exposed header

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From: Avi Kivity
Subject: [PATCH 013/104] KVM: Trivial: Use standard BITMAP macros, open-code userspace-exposed header
Date: Monday, September 17, 2007 - 1:30 am

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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Messages in current thread:
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Nick Piggin, (Sun Sep 16, 2:29 pm)
[PATCH 000/104] KVM patch queue for the 2.6.24 merge window, Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 002/104] KVM: SMP: Add vcpu_id field in struct vcpu, Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 003/104] KVM: Future-proof the exit information uni ..., Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 004/104] KVM: In-kernel string pio write support, Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 005/104] KVM: Trivial: /dev/kvm interface is no lon ..., Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 006/104] KVM: Trivial: Remove unused struct cpu_use ..., Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 007/104] KVM: Trivial: Make decode_register() static, Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 008/104] KVM: Trivial: Comment spelling may escape grep, Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 009/104] KVM: Trivial: Avoid hardware_disable prede ..., Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 010/104] KVM: Trivial: Use standard CR0 flags macro ..., Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 011/104] KVM: Use standard CR3 flags, tighten checking, Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 012/104] KVM: Use standard CR4 flags, tighten checking, Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 013/104] KVM: Trivial: Use standard BITMAP macros, ..., Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 014/104] KVM: Set exit_reason to KVM_EXIT_MMIO wher ..., Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 015/104] KVM: Use standard CR8 flags, and fix TPR d ..., Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 016/104] KVM: x86 emulator: fix cmov for writeback ..., Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 017/104] KVM: x86 emulator: fix faulty check for tw ..., Avi Kivity, (Mon Sep 17, 1:30 am)
[PATCH 018/104] KVM: Return if the pdptrs are invalid when ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 019/104] KVM: Hoist kvm_mmu_reload() out of the cri ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 020/104] KVM: Move gfn_to_page out of kmap/unmap pairs, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 021/104] KVM: VMX: Import some constants of vmcs fr ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 022/104] KVM: Remove dead code in the cmpxchg instr ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 023/104] KVM: load_pdptrs() cleanups, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 024/104] KVM: Remove arch specific components from ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 025/104] KVM: Dynamically allocate vcpus, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 026/104] KVM: VMX: Improve the method of writing vm ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 027/104] KVM: add hypercall nr to kvm_run, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 028/104] KVM: Use the scheduler preemption notifier ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 029/104] KVM: Convert vm lock to a mutex, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 030/104] KVM: fx_init() needs preemption disabled w ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 031/104] KVM: VMX: pass vcpu_vmx internally, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 032/104] KVM: Remove three magic numbers, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 033/104] KVM: SVM: de-containization, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 034/104] KVM: SVM: internal function name cleanup, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 035/104] KVM: Change the emulator_{read,write,cmpxc ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 036/104] KVM: Remove kvm_{read,write}_guest(), Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 037/104] KVM: Use kmem cache for allocating vcpus, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 038/104] KVM: Use alignment properties of vcpu to s ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 039/104] KVM: kvm_vm_ioctl_get_dirty_log restore &quot;n ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 040/104] KVM: VMX: Add cpu consistency check, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 041/104] KVM: Don't assign vcpu-&gt;cr3 if it's invali ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 042/104] KVM: Cleanup mark_page_dirty, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 043/104] KVM: SVM: Make set_msr_interception more r ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 044/104] KVM: Remove redundant alloc_vmcs_cpu decla ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 045/104] KVM: Fix defined but not used warning in d ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 046/104] KVM: Remove stat_set from debugfs, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 047/104] KVM: Remove unneeded kvm_dev_open and kvm_ ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 048/104] KVM: Add and use pr_unimpl for standard fo ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 049/104] KVM: Use kmem_cache_free for kmem_cache_za ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 050/104] KVM: VMX: Remove a duplicated ia32e mode v ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 051/104] KVM: Remove useless assignment, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 052/104] KVM: Cleanup string I/O instruction emulation, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 053/104] KVM: Clean up kvm_setup_pio(), Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 055/104] KVM: Communicate cr8 changes to userspace, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 056/104] KVM: x86 emulator: implement 'and $imm, %{ ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 057/104] KVM: x86 emulator: implement 'jmp rel' ins ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 058/104] KVM: x86 emulator: Implement 'jmp rel shor ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 059/104] KVM: x86 emulator: implement 'push reg' (o ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 060/104] KVM: VMX: allow rmode_tss_base() to work w ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 061/104] KVM: Support more memory slots, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 062/104] KVM: X86 emulator: fix 'push reg' writeback, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 063/104] KVM: VMX: Split segments reload in vmx_loa ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 064/104] KVM: Add support for in-kernel PIC emulation, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 065/104] KVM: Define and use cr8 access functions, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 066/104] KVM: Emulate local APIC in kernel, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 067/104] KVM: In-kernel I/O APIC model, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 068/104] KVM: Emulate hlt in the kernel, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 069/104] KVM: Protect in-kernel pio using kvm-&gt;lock, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 070/104] KVM: Add get/set irqchip ioctls for in-ker ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 071/104] KVM: Bypass irq_pending get/set when using ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 072/104] KVM: in-kernel IOAPIC save and restore support, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 073/104] KVM: in-kernel LAPIC save and restore support, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 074/104] KVM: pending irq save/restore, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 075/104] KVM: VMX: Use shadow TPR/cr8 for 64-bits g ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 076/104] KVM: Keep track of missed timer irq injections, Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 077/104] KVM: Migrate lapic hrtimer when vcpu moves ..., Avi Kivity, (Mon Sep 17, 1:31 am)
[PATCH 078/104] KVM: disable tpr/cr8 sync when in-kernel A ..., Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 079/104] KVM: deliver PIC interrupt only to vcpu0, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 080/104] KVM: round robin for APIC lowest priority ..., Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 081/104] KVM: enable in-kernel APIC INIT/SIPI handling, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 082/104] KVM: Set the ET flag in CR0 after initiali ..., Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 083/104] KVM: Remove the unused invlpg member of st ..., Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 084/104] KVM: Clean up unloved invlpg emulation, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 085/104] KVM: Keep control regs in sync, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 086/104] KVM: Hoist SVM's get_cs_db_l_bits into cor ..., Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 087/104] KVM: Simplify memory allocation, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 088/104] KVM: Rename kvm_arch_ops to kvm_x86_ops, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 089/104] KVM: MMU: Don't do GFP_NOWAIT allocations, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 090/104] KVM: VMX: Move vm entry failure handling t ..., Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 091/104] KVM: Move main vcpu loop into subarch inde ..., Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 092/104] KVM: VMX: Fix exit qualification width on i386, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 093/104] KVM: x86 emulator: push imm8, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 094/104] KVM: x86 emulator: call near, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 095/104] KVM: x86 emulator: pushf, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 096/104] KVM: Improve emulation failure reporting, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 097/104] KVM: x86 emulator: sort opcodes into ascen ..., Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 098/104] KVM: x86 emulator: imlpement jump conditio ..., Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 099/104] KVM: X86 emulator: jump conditional short, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 100/104] KVM: x86 emulator: lea, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 101/104] KVM: x86 emulator: jmp abs, Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 102/104] KVM: x86 emulator: fix src, dst value init ..., Avi Kivity, (Mon Sep 17, 1:32 am)
[PATCH 103/104] KVM: x86 emulator: popf, Avi Kivity, (Mon Sep 17, 1:32 am)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Christoph Hellwig, (Mon Sep 17, 2:13 am)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Avi Kivity, (Mon Sep 17, 2:15 am)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Avi Kivity, (Mon Sep 17, 2:18 am)
git-send-email creates duplicate Message-Id's, Adrian Bunk, (Mon Sep 17, 8:59 am)
Re: [PATCH 048/104] KVM: Add and use pr_unimpl for standar ..., Joe Perches, (Mon Sep 17, 9:16 am)
Re: [PATCH 045/104] KVM: Fix defined but not used warning ..., David Miller, (Mon Sep 17, 9:27 am)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Nick Piggin, (Mon Sep 17, 10:17 am)
Re: [kvm-devel] [PATCH 045/104] KVM: Fix defined but not u ..., Avi Kivity, (Mon Sep 17, 10:35 am)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Avi Kivity, (Mon Sep 17, 11:19 am)
Re: git-send-email creates duplicate Message-Id's, Junio C Hamano, (Mon Sep 17, 1:22 pm)
Re: git-send-email creates duplicate Message-Id's, Matti Aarnio, (Mon Sep 17, 1:47 pm)
Re: [PATCH 048/104] KVM: Add and use pr_unimpl for standar ..., Rusty Russell, (Mon Sep 17, 4:08 pm)
Re: [PATCH 001/104] KVM: Fix *nopage() in kvm_main.c, Avi Kivity, (Tue Sep 18, 3:44 am)