[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [kvm-unit-tests PATCH 3/8] lib/asm-generic: add atomic.h
From: |
Peter Xu |
Subject: |
[Qemu-devel] [kvm-unit-tests PATCH 3/8] lib/asm-generic: add atomic.h |
Date: |
Fri, 30 Dec 2016 16:55:55 +0800 |
Provide some gcc-builtin atomic ops.
Signed-off-by: Peter Xu <address@hidden>
---
lib/asm-generic/atomic.h | 21 +++++++++++++++++++++
lib/x86/atomic.h | 2 ++
2 files changed, 23 insertions(+)
create mode 100644 lib/asm-generic/atomic.h
diff --git a/lib/asm-generic/atomic.h b/lib/asm-generic/atomic.h
new file mode 100644
index 0000000..26b645a
--- /dev/null
+++ b/lib/asm-generic/atomic.h
@@ -0,0 +1,21 @@
+#ifndef __ASM_GENERIC_ATOMIC_H__
+#define __ASM_GENERIC_ATOMIC_H__
+
+/* From QEMU include/qemu/atomic.h */
+#define atomic_fetch_inc(ptr) __sync_fetch_and_add(ptr, 1)
+#define atomic_fetch_dec(ptr) __sync_fetch_and_add(ptr, -1)
+#define atomic_fetch_add(ptr, n) __sync_fetch_and_add(ptr, n)
+#define atomic_fetch_sub(ptr, n) __sync_fetch_and_sub(ptr, n)
+#define atomic_fetch_and(ptr, n) __sync_fetch_and_and(ptr, n)
+#define atomic_fetch_or(ptr, n) __sync_fetch_and_or(ptr, n)
+#define atomic_fetch_xor(ptr, n) __sync_fetch_and_xor(ptr, n)
+
+#define atomic_inc_fetch(ptr) __sync_add_and_fetch(ptr, 1)
+#define atomic_dec_fetch(ptr) __sync_add_and_fetch(ptr, -1)
+#define atomic_add_fetch(ptr, n) __sync_add_and_fetch(ptr, n)
+#define atomic_sub_fetch(ptr, n) __sync_sub_and_fetch(ptr, n)
+#define atomic_and_fetch(ptr, n) __sync_and_and_fetch(ptr, n)
+#define atomic_or_fetch(ptr, n) __sync_or_and_fetch(ptr, n)
+#define atomic_xor_fetch(ptr, n) __sync_xor_and_fetch(ptr, n)
+
+#endif
diff --git a/lib/x86/atomic.h b/lib/x86/atomic.h
index de2f033..c9ce489 100644
--- a/lib/x86/atomic.h
+++ b/lib/x86/atomic.h
@@ -1,6 +1,8 @@
#ifndef __ATOMIC_H
#define __ATOMIC_H
+#include "asm-generic/atomic.h"
+
typedef struct {
volatile int counter;
} atomic_t;
--
2.7.4
- [Qemu-devel] [kvm-unit-tests PATCH 0/8] VT-d ioapic irq test, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 1/8] pci: introduce pci_intx_line(), Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 2/8] pci: introduce pci_msi_set_enable(), Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 3/8] lib/asm-generic: add atomic.h,
Peter Xu <=
- [Qemu-devel] [kvm-unit-tests PATCH 4/8] x86: ioapic: generalize trigger mode, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 5/8] intel-iommu: add report prefixes, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 6/8] intel-iommu: use atomic ops for irte index alloc, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 7/8] intel-iommu: allow setup trigger mode for irte, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 8/8] intel-iommu: add ioapic irq test, Peter Xu, 2016/12/30