From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x2267lm1dGpVktJr4EHF1RCasPd2gVVOXdlym0ZZ6oMC4mbdxQ9hPVJjBTovM4KCriqnKm+ry ARC-Seal: i=1; a=rsa-sha256; t=1519218402; cv=none; d=google.com; s=arc-20160816; b=v3Y3+Dxl9bHNLcjJxLFOE5SDmPGhYDEmPzzN2OpBLr82f1F8W2NsZTzSJMJAH7zvX5 L/E2h1wfHDIsxSx2QjXoWmTf+T/keRSy62T24UjpPLOXMwfWz2S/D6eJD2hMGeDz0wzp H+vFD/4UHO+y5zf+G9AWCKmw3n/QNCWzOArys2LfKNHwpxgYCWnUfROwkxgOgj4K9oj5 s6x/M8URRXjyVLxTeVSxjM5Y8d7HHVoxx734+egtF9ejPAllUDPXVlX/ulkNnzMSoCg/ 73biRUQZOs1Le6V+txsX2yl33R/LOEGmHnt76z3qcQUm3WXJK1FMZC7mrtjoD5nis3kB 0vRw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=cxoNes1bUGZMCmnx0Zk0c54cZRyYsz4en8OWWSGXvB0=; b=V1NKhDSUOi26+9BYX4Ia+507hW/F0cLmFAKJSxZZcWISGJ/ieoZafaX/TcK/PC8k9L IeAlimDDwp9PveHbgjVabtus9I1/O+hklGzXRkdNsH3nNXJJqZB5lW/GLAPK+LapGVvI r34TY2IUqVPxai8oJjay1YkPi/xy3A78LmzTN2E13x5Dr01Hs0AZR5XBKRpGGHJlfo9A KIuvne+YzOmEmffLDZyNXevbafSxPZrgBrgtKF3PziojGSowLbfb4BsdaV3TP4YtAdgH 2aADj3UGpNU7vdHD2k60yaIzos9EP6A2QEB6xPb7hU4aMR1qKuFDnBmlIB3gzvrUaCXl 9BFw== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.71.90 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.71.90 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mahesh Salgaonkar , Balbir Singh , Michael Ellerman Subject: [PATCH 4.15 019/163] powerpc/radix: Remove trace_tlbie call from radix__flush_tlb_all Date: Wed, 21 Feb 2018 13:47:28 +0100 Message-Id: <20180221124531.198406709@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180221124529.931834518@linuxfoundation.org> References: <20180221124529.931834518@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1593015431627887973?= X-GMAIL-MSGID: =?utf-8?q?1593015955262231195?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mahesh Salgaonkar commit 8d81296cfcce89013a714feb8d25004a156f8181 upstream. radix__flush_tlb_all() is called only in kexec path in real mode and any tracepoints at this stage will make kexec to fail if enabled. To verify enable tlbie trace before kexec. $ echo 1 > /sys/kernel/debug/tracing/events/powerpc/tlbie/enable == kexec into new kernel and kexec fails. Fix this by not calling trace_tlbie from radix__flush_tlb_all(). Fixes: 0428491cba92 ("powerpc/mm: Trace tlbie(l) instructions") Cc: stable@vger.kernel.org # v4.13+ Signed-off-by: Mahesh Salgaonkar Acked-by: Balbir Singh Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/mm/tlb-radix.c | 2 -- 1 file changed, 2 deletions(-) --- a/arch/powerpc/mm/tlb-radix.c +++ b/arch/powerpc/mm/tlb-radix.c @@ -600,14 +600,12 @@ void radix__flush_tlb_all(void) */ asm volatile(PPC_TLBIE_5(%0, %4, %3, %2, %1) : : "r"(rb), "i"(r), "i"(1), "i"(ric), "r"(rs) : "memory"); - trace_tlbie(0, 0, rb, rs, ric, prs, r); /* * now flush host entires by passing PRS = 0 and LPID == 0 */ asm volatile(PPC_TLBIE_5(%0, %4, %3, %2, %1) : : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(0) : "memory"); asm volatile("eieio; tlbsync; ptesync": : :"memory"); - trace_tlbie(0, 0, rb, 0, ric, prs, r); } void radix__flush_tlb_pte_p9_dd1(unsigned long old_pte, struct mm_struct *mm,