linux-kernel - [PATCH v6 1/2] perf,kvm/powerpc: Add kvm

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Date:	Mon, 31 Aug 2015 12:18:00 +0530
From:	Hemant Kumar <hemant@...ux.vnet.ibm.com>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	linux-kernel@...r.kernel.org, scottwood@...escale.com,
	acme@...nel.org, mingo@...nel.org, mpe@...erman.id.au,
	sukadev@...ux.vnet.ibm.com, maddy@...ux.vnet.ibm.com,
	warrier@...ux.vnet.ibm.com, srikar@...ux.vnet.ibm.com,
	paulus@...ba.org, Hemant Kumar <hemant@...ux.vnet.ibm.com>
Subject: [PATCH v6 1/2] perf,kvm/powerpc: Add kvm_perf.h for powerpc

To analyze the exit events with perf, we need to export the related
tracepoints through kvm_perf.h. kvm_perf.h is to be added in the
arch/powerpc directory, where the kvm tracepoints needed to trace the
KVM exit events are defined.

To indicate that the tracepoints are book3s_hv specific, suffix _HV has
been added to the tracepoint macros. Additionally, we also need to
define the generic macros (albeit, with null strings) suffix, because
the preprocessor looks for them in the generic code in builtin-kvm.c.

Signed-off-by: Hemant Kumar <hemant@...ux.vnet.ibm.com>
---
Changes since v5:
- Moved back the tracepoint definitions from kvm_perf_book3s.h to kvm_perf.h

 arch/powerpc/include/uapi/asm/kvm_perf.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 arch/powerpc/include/uapi/asm/kvm_perf.h

diff --git a/arch/powerpc/include/uapi/asm/kvm_perf.h b/arch/powerpc/include/uapi/asm/kvm_perf.h
new file mode 100644
index 0000000..68f105e
--- /dev/null
+++ b/arch/powerpc/include/uapi/asm/kvm_perf.h
@@ -0,0 +1,21 @@
+#ifndef _ASM_POWERPC_KVM_PERF_H
+#define _ASM_POWERPC_KVM_PERF_H
+
+#include <asm/kvm.h>
+
+#define DECODE_STR_LEN 40
+
+#define VCPU_ID "vcpu_id"
+
+/* For Book3S_HV machines */
+#define KVM_ENTRY_TRACE_HV "kvm_hv:kvm_guest_enter"
+#define KVM_EXIT_TRACE_HV "kvm_hv:kvm_guest_exit"
+#define KVM_EXIT_REASON_HV "trap"
+
+/* This is to shut the compiler up */
+#define KVM_ENTRY_TRACE ""
+#define KVM_EXIT_TRACE ""
+#define KVM_EXIT_REASON ""
+
+
+#endif /* _ASM_POWERPC_KVM_PERF_H */
-- 
1.9.3

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