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authorPeter Maydell <peter.maydell@linaro.org>2013-11-22 12:00:21 +0000
committerPeter Maydell <peter.maydell@linaro.org>2013-11-22 12:00:21 +0000
commit8c5e3f562727189e4774d27397153a8ff723bfe2 (patch)
tree8293910e636c5e63cfce88639d118e0b53041578
parent607bb022f2a44797cbf40e85e84da4134e2f0e01 (diff)
downloadqemu-arm-8c5e3f562727189e4774d27397153a8ff723bfe2.tar.gz
target-arm: Provide mechanism for getting KVM constants even if not CONFIG_KVM
There are a number of places where it would be convenient for ARM code to have working definitions of KVM constants even in code which is compiled with CONFIG_KVM not set. In this situation we can't simply include the kernel KVM headers (which might conflict with host header definitions or not even compile on the compiler we're using) so we have to redefine equivalent constants. Provide a mechanism for doing this and checking that the values match, and use it for the constants we're currently exposing via an ad-hoc mechanism. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r--target-arm/cpu.h13
-rw-r--r--target-arm/kvm-consts.h41
-rw-r--r--target-arm/kvm.c9
3 files changed, 43 insertions, 20 deletions
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 9f110f15b6..c3f007fc53 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -21,6 +21,8 @@
#include "config.h"
+#include "kvm-consts.h"
+
#if defined(TARGET_AARCH64)
/* AArch64 definitions */
# define TARGET_LONG_BITS 64
@@ -497,17 +499,6 @@ void armv7m_nvic_complete_irq(void *opaque, int irq);
(((cp) << 16) | ((is64) << 15) | ((crn) << 11) | \
((crm) << 7) | ((opc1) << 3) | (opc2))
-/* Note that these must line up with the KVM/ARM register
- * ID field definitions (kvm.c will check this, but we
- * can't just use the KVM defines here as the kvm headers
- * are unavailable to non-KVM-specific files)
- */
-#define CP_REG_SIZE_SHIFT 52
-#define CP_REG_SIZE_MASK 0x00f0000000000000ULL
-#define CP_REG_SIZE_U32 0x0020000000000000ULL
-#define CP_REG_SIZE_U64 0x0030000000000000ULL
-#define CP_REG_ARM 0x4000000000000000ULL
-
/* Convert a full 64 bit KVM register ID to the truncated 32 bit
* version used as a key for the coprocessor register hashtable
*/
diff --git a/target-arm/kvm-consts.h b/target-arm/kvm-consts.h
new file mode 100644
index 0000000000..6f56f726d3
--- /dev/null
+++ b/target-arm/kvm-consts.h
@@ -0,0 +1,41 @@
+/*
+ * KVM ARM ABI constant definitions
+ *
+ * Copyright (c) 2013 Linaro Limited
+ *
+ * Provide versions of KVM constant defines that can be used even
+ * when CONFIG_KVM is not set and we don't have access to the
+ * KVM headers. If CONFIG_KVM is set, we do a compile-time check
+ * that we haven't got out of sync somehow.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#ifndef ARM_KVM_CONSTS_H
+#define ARM_KVM_CONSTS_H
+
+#ifdef CONFIG_KVM
+#include "qemu/compiler.h"
+#include <linux/kvm.h>
+
+#define MISMATCH_CHECK(X, Y) QEMU_BUILD_BUG_ON(X != Y)
+
+#else
+#define MISMATCH_CHECK(X, Y)
+#endif
+
+#define CP_REG_SIZE_SHIFT 52
+#define CP_REG_SIZE_MASK 0x00f0000000000000ULL
+#define CP_REG_SIZE_U32 0x0020000000000000ULL
+#define CP_REG_SIZE_U64 0x0030000000000000ULL
+#define CP_REG_ARM 0x4000000000000000ULL
+
+MISMATCH_CHECK(CP_REG_SIZE_SHIFT, KVM_REG_SIZE_SHIFT)
+MISMATCH_CHECK(CP_REG_SIZE_MASK, KVM_REG_SIZE_MASK)
+MISMATCH_CHECK(CP_REG_SIZE_U32, KVM_REG_SIZE_U32)
+MISMATCH_CHECK(CP_REG_SIZE_U64, KVM_REG_SIZE_U64)
+MISMATCH_CHECK(CP_REG_ARM, KVM_REG_ARM)
+
+#undef MISMATCH_CHECK
+
+#endif
diff --git a/target-arm/kvm.c b/target-arm/kvm.c
index 6e5cd36fae..309845630b 100644
--- a/target-arm/kvm.c
+++ b/target-arm/kvm.c
@@ -23,15 +23,6 @@
#include "cpu.h"
#include "hw/arm/arm.h"
-/* Check that cpu.h's idea of coprocessor fields matches KVM's */
-#if (CP_REG_SIZE_SHIFT != KVM_REG_SIZE_SHIFT) || \
- (CP_REG_SIZE_MASK != KVM_REG_SIZE_MASK) || \
- (CP_REG_SIZE_U32 != KVM_REG_SIZE_U32) || \
- (CP_REG_SIZE_U64 != KVM_REG_SIZE_U64) || \
- (CP_REG_ARM != KVM_REG_ARM)
-#error mismatch between cpu.h and KVM header definitions
-#endif
-
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_LAST_INFO
};