linux-kernel - [PATCH v5 2/2] perf,kvm/ppc: Add hcall related info to kvm

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Date:	Thu, 16 Jul 2015 21:18:42 +0530
From:	Hemant Kumar <hemant@...ux.vnet.ibm.com>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	linux-kernel@...r.kernel.org, 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,
	scottwood@...escale.com, Hemant Kumar <hemant@...ux.vnet.ibm.com>
Subject: [PATCH v5 2/2] perf,kvm/ppc: Add hcall related info to kvm_perf.h

To analyze the hcalls with perf, we need the hcall related tracepoints
information to be exported.

This patch adds hcall tracepoints "kvm_hv:kvm_hcall_enter" and
"kvm_hv:kvm_hcall_exit" to kvm_perf.h. So, perf will now know as to what
tracepoints to look for if we are using "perf kvm stat record" to
collect guest hcall statistics.

Signed-off-by: Hemant Kumar <hemant@...ux.vnet.ibm.com>
---
Changes:
- Not exporting the hcall related codes and names through uapi compared to
  previous patch.

 arch/powerpc/include/uapi/asm/kvm_perf_book3s.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/include/uapi/asm/kvm_perf_book3s.h b/arch/powerpc/include/uapi/asm/kvm_perf_book3s.h
index 8c8d8c2..1378a8d 100644
--- a/arch/powerpc/include/uapi/asm/kvm_perf_book3s.h
+++ b/arch/powerpc/include/uapi/asm/kvm_perf_book3s.h
@@ -11,4 +11,8 @@
 #define KVM_EXIT_TRACE "kvm_hv:kvm_guest_exit"
 #define KVM_EXIT_REASON "trap"
 
+#define KVM_HCALL_ENTRY_TRACE "kvm_hv:kvm_hcall_enter"
+#define KVM_HCALL_EXIT_TRACE "kvm_hv:kvm_hcall_exit"
+#define KVM_HCALL_REASON "req"
+
 #endif /* _ASM_POWERPC_KVM_PERF_BOOK3S_H */
-- 
1.9.3

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