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Date: Tue, 23 May 2017 09:42:47 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Alexei Starovoitov <ast@fb.com>
Cc: "David S . Miller" <davem@davemloft.net>,
        Brendan Gregg <bgregg@netflix.com>,
        Daniel Borkmann <daniel@iogearbox.net>, Teng Qin <qinteng@fb.com>,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        kernel-team@fb.com
Subject: Re: [PATCH net-next 1/2] perf, bpf: add support for HW_CACHE and RAW
 events
Message-ID: <20170523074247.esnr4fj2squn4w2d@hirez.programming.kicks-ass.net>
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 <20170522224840.810121-2-ast@fb.com>
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On Mon, May 22, 2017 at 03:48:39PM -0700, Alexei Starovoitov wrote:
> From: Teng Qin <qinteng@fb.com>
> 
> This commit adds support for attach BPF program to RAW and HW_CACHE type
> events, and support for read HW_CACHE type event counters in BPF
> program. Existing code logic already supports them, so this commit is
> just update Enum value checks.

So what I'm missing is why they were not supported previously, and what
changed to allow it now.