From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:36878 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031202AbeGAQjO (ORCPT ); Sun, 1 Jul 2018 12:39:14 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vaibhav Jain , Andrew Donnellan , Alastair DSilva , Christophe Lombard , Michael Ellerman Subject: [PATCH 4.17 059/220] cxl: Configure PSL to not use APC virtual machines Date: Sun, 1 Jul 2018 18:21:23 +0200 Message-Id: <20180701160910.838449918@linuxfoundation.org> In-Reply-To: <20180701160908.272447118@linuxfoundation.org> References: <20180701160908.272447118@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vaibhav Jain commit 9a6d2022bacd8fca0be6297459a02dfd28dad6ba upstream. APC virtual machines arent used on POWER-9 chips and are already disabled in on-chip CAPP. They also need to be disabled on the PSL via 'PSL Data Send Control Register' by setting bit(47). This forces the PSL to send commands to CAPP with queue.id == 0. Fixes: 5632874311db ("cxl: Add support for POWER9 DD2") Cc: stable@vger.kernel.org # v4.15+ Signed-off-by: Vaibhav Jain Acked-by: Andrew Donnellan Reviewed-by: Alastair D'Silva Reviewed-by: Christophe Lombard Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman --- drivers/misc/cxl/pci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -514,9 +514,9 @@ static int init_implementation_adapter_r cxl_p1_write(adapter, CXL_PSL9_FIR_CNTL, psl_fircntl); /* Setup the PSL to transmit packets on the PCIe before the - * CAPP is enabled + * CAPP is enabled. Make sure that CAPP virtual machines are disabled */ - cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0001001000002A10ULL); + cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0001001000012A10ULL); /* * A response to an ASB_Notify request is returned by the