Commit 99320cc8 authored by Joerg Roedel's avatar Joerg Roedel Committed by Arnaldo Carvalho de Melo

perf tools: Add support for guest/host-only profiling

To restrict a counter to either host or guest mode this patch introduces
two new event modifiers: G and H.

With G the counter is configured in guest-only mode and with H in
host-only mode.

Cc: Gleb Natapov <gleb@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Link: http://lkml.kernel.org/n/tip-or5aj3rghy9ngyg882z6kln9@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 1aed2671
......@@ -21,6 +21,8 @@ EVENT MODIFIERS
Events can optionally have a modifer by appending a colon and one or
more modifiers. Modifiers allow the user to restrict when events are
counted with 'u' for user-space, 'k' for kernel, 'h' for hypervisor.
Additional modifiers are 'G' for guest counting (in KVM guests) and 'H'
for host counting (not in KVM guests).
The 'p' modifier can be used for specifying how precise the instruction
address should be. The 'p' modifier is currently only implemented for
......
......@@ -735,8 +735,8 @@ static int
parse_event_modifier(const char **strp, struct perf_event_attr *attr)
{
const char *str = *strp;
int exclude = 0;
int eu = 0, ek = 0, eh = 0, precise = 0;
int exclude = 0, exclude_GH = 0;
int eu = 0, ek = 0, eh = 0, eH = 0, eG = 0, precise = 0;
if (!*str)
return 0;
......@@ -760,6 +760,14 @@ parse_event_modifier(const char **strp, struct perf_event_attr *attr)
if (!exclude)
exclude = eu = ek = eh = 1;
eh = 0;
} else if (*str == 'G') {
if (!exclude_GH)
exclude_GH = eG = eH = 1;
eG = 0;
} else if (*str == 'H') {
if (!exclude_GH)
exclude_GH = eG = eH = 1;
eH = 0;
} else if (*str == 'p') {
precise++;
} else
......@@ -776,6 +784,8 @@ parse_event_modifier(const char **strp, struct perf_event_attr *attr)
attr->exclude_kernel = ek;
attr->exclude_hv = eh;
attr->precise_ip = precise;
attr->exclude_host = eH;
attr->exclude_guest = eG;
return 0;
}
......
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