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From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Andrew Murray <andrew.murray@arm.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Will Deacon <will.deacon@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Borislav Petkov <bp@alien8.de>, x86@kernel.org
Cc:     linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 10/10] perf/doc: update design.txt for exclude_{host|guest} flags
In-Reply-To: <1542363853-13849-11-git-send-email-andrew.murray@arm.com>
References: <1542363853-13849-1-git-send-email-andrew.murray@arm.com> <1542363853-13849-11-git-send-email-andrew.murray@arm.com>
Date:   Tue, 20 Nov 2018 22:31:36 +1100
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Andrew Murray <andrew.murray@arm.com> writes:

> Update design.txt to reflect the presence of the exclude_host
> and exclude_guest perf flags.
>
> Signed-off-by: Andrew Murray <andrew.murray@arm.com>
> ---
>  tools/perf/design.txt | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/tools/perf/design.txt b/tools/perf/design.txt
> index a28dca2..7de7d83 100644
> --- a/tools/perf/design.txt
> +++ b/tools/perf/design.txt
> @@ -222,6 +222,10 @@ The 'exclude_user', 'exclude_kernel' and 'exclude_hv' bits provide a
>  way to request that counting of events be restricted to times when the
>  CPU is in user, kernel and/or hypervisor mode.
>  
> +Furthermore the 'exclude_host' and 'exclude_guest' bits provide a way
> +to request counting of events restricted to guest and host contexts when
> +using virtualisation.

How does exclude_host differ from exclude_hv ?

cheers