From: Wei Huang <w...@redhat.com>
This patch defines the list of kvm_exit reasons for aarch64. This list is
based on the Exception Class (EC) field of HSR register. With this patch
users can trace the execution of guest VMs better. A sample output from
command "kvm_stat -1 -t" is shown as the following:
<...>
kvm_exit(WATCHPT_HYP) 0 0
kvm_exit(WFI) 9422 9361
NOTE: This patch requires TRACE_EVENT(kvm_exit) to include exit_reason
field in TP_ARGS. A patch to upstream kernel has been submitted.
Signed-off-by: Wei Huang <w...@redhat.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
scripts/kvm/kvm_stat | 42 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 41 insertions(+), 1 deletion(-)
diff --git a/scripts/kvm/kvm_stat b/scripts/kvm/kvm_stat
index c0c4ff0..c65cabd 100755
--- a/scripts/kvm/kvm_stat
+++ b/scripts/kvm/kvm_stat
@@ -145,6 +145,45 @@ svm_exit_reasons = {
0x400: 'NPF',
}
+# EC definition of HSR (from arch/arm64/include/asm/kvm_arm.h)
+aarch64_exit_reasons = {
+ 0x00: 'UNKNOWN',
+ 0x01: 'WFI',
+ 0x03: 'CP15_32',
+ 0x04: 'CP15_64',
+ 0x05: 'CP14_MR',
+ 0x06: 'CP14_LS',
+ 0x07: 'FP_ASIMD',
+ 0x08: 'CP10_ID',
+ 0x0C: 'CP14_64',
+ 0x0E: 'ILL_ISS',
+ 0x11: 'SVC32',
+ 0x12: 'HVC32',
+ 0x13: 'SMC32',
+ 0x15: 'SVC64',
+ 0x16: 'HVC64',
+ 0x17: 'SMC64',
+ 0x18: 'SYS64',
+ 0x20: 'IABT',
+ 0x21: 'IABT_HYP',
+ 0x22: 'PC_ALIGN',
+ 0x24: 'DABT',
+ 0x25: 'DABT_HYP',
+ 0x26: 'SP_ALIGN',
+ 0x28: 'FP_EXC32',
+ 0x2C: 'FP_EXC64',
+ 0x2F: 'SERROR',
+ 0x30: 'BREAKPT',
+ 0x31: 'BREAKPT_HYP',
+ 0x32: 'SOFTSTP',
+ 0x33: 'SOFTSTP_HYP',
+ 0x34: 'WATCHPT',
+ 0x35: 'WATCHPT_HYP',
+ 0x38: 'BKPT32',
+ 0x3A: 'VECTOR32',
+ 0x3C: 'BRK64',
+}
+
# From include/uapi/linux/kvm.h, KVM_EXIT_xxx
userspace_exit_reasons = {
0: 'UNKNOWN',
@@ -212,7 +251,8 @@ def ppc_init():
def aarch64_init():
globals().update({
- 'sc_perf_evt_open' : 241
+ 'sc_perf_evt_open' : 241,
+ 'exit_reasons' : aarch64_exit_reasons,
})
def detect_platform():
--
2.3.0
