From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-380590-1524842056-2-12737370036800113055 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, MAILING_LIST_MULTI -1, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, LANGUAGES unknown, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=fm2; t= 1524842055; b=hSF4/ie4KougdvV4KGbUlhQKKtvL/G8rZCalHk2hvY8rFL7dwd DHmZSSPwPqMiPad9GQf0bh7gr/Zg35Xpzo5+6y5gzPiEWC6SerfRgVVekv03A8ry TP452/DPoggNYm//7LZyhLWlONg71ueFqGg4wbClLlzJx4Vt3kw3g95oD48OJHyH M5Ih2yW3zQhXPD3y943tz5kMxHC6LhvewiwvmKRgoQ+c/u0upsEHW34hd+9E3vwd oK1REN1tRvgzYbiXwfd0HdqiFm7BPuyWkXfJjbw+dK1fpfsKrEozp438TJT6mQHu cdIzX73t69FGgZZrQYtOTAVCq1VYtnTwqzJg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=fm2; t=1524842055; bh=lOBIklq/6IvNcvOuOGn7kFryBT0eKE YoVTTZAzOfJeM=; b=D7x8LFE61+XYGDT2ZxFCCZWHNRODNViljNjuH3F2ju9yeK ZNYg4EhI2SRSPFB+0IoEQNy4LiAjhsydGhRgvziIuNxNhIEFNHNcoOmZGxF292jZ KL3ctk6dJVuYZsHmmdM1wHTV5SjmOIedOom/GxvOIMsGPGt3J3YC9PtWhMWBbXQ4 7qpp5KNDZsAuvdq2prDYnG7PoVnpW/oQOwZ9FJmOmhdFFa9DzUKrag8t7Lduq3gH J+IqmdgxzsXGFyiPfcOHRNPI1hrIpQnNbbHv62qTCCn+/MBoHjLW9o4aWybblBfG zbpmHKsScNupsfSa6N7PvNXvP9GCmD5Aby+QQawQ== ARC-Authentication-Results: i=1; mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 Authentication-Results: mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfB2dKkDQzylo50DrE4qn7ErOlLTRbmEjlVYgHTTOk9jxLNR5azld/NpBwO4Zgzw1NaqwIQyZ92Ypfs+pDIx1NGUI68W8pXN9r8CNj4ZQIZe3rV5hT7F4 +v0SwQJFYePEXMXgZUhC/RX6K6HlhldsZhXg9kwhJK99s+3AiVPdMmwk5rRICvATi9wyvKvweDrRjqi1XcbqQp9DQeEs2H+oDcEoOdW0wGK7ZMkYLPkKG2CG X-CM-Analysis: v=2.3 cv=Tq3Iegfh c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=IkcTkHD0fZMA:10 a=Kd1tUaAdevIA:10 a=VnNF1IyMAAAA:8 a=20KFwNOVAAAA:8 a=ag1SF4gXAAAA:8 a=UCc2L4ef9RhdiquWdVcA:9 a=QEXdDO2ut3YA:10 a=Yupwre4RP9_Eg_Bd0iYG:22 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933601AbeD0OD4 (ORCPT ); Fri, 27 Apr 2018 10:03:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:50320 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933596AbeD0ODx (ORCPT ); Fri, 27 Apr 2018 10:03:53 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D0B9F2189D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=fail smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Martin Schwidefsky , David Hildenbrand , Cornelia Huck Subject: [PATCH 4.9 33/74] s390/alternative: use a copy of the facility bit mask Date: Fri, 27 Apr 2018 15:58:23 +0200 Message-Id: <20180427135711.305124292@linuxfoundation.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180427135709.899303463@linuxfoundation.org> References: <20180427135709.899303463@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Martin Schwidefsky [ Upstream commit cf1489984641369611556bf00c48f945c77bcf02 ] To be able to switch off specific CPU alternatives with kernel parameters make a copy of the facility bit mask provided by STFLE and use the copy for the decision to apply an alternative. Reviewed-by: David Hildenbrand Reviewed-by: Cornelia Huck Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman --- arch/s390/include/asm/facility.h | 18 ++++++++++++++++++ arch/s390/include/asm/lowcore.h | 3 ++- arch/s390/kernel/alternative.c | 3 ++- arch/s390/kernel/early.c | 3 +++ arch/s390/kernel/setup.c | 4 +++- arch/s390/kernel/smp.c | 4 +++- 6 files changed, 31 insertions(+), 4 deletions(-) --- a/arch/s390/include/asm/facility.h +++ b/arch/s390/include/asm/facility.h @@ -17,6 +17,24 @@ #define MAX_FACILITY_BIT (256*8) /* stfle_fac_list has 256 bytes */ +static inline void __set_facility(unsigned long nr, void *facilities) +{ + unsigned char *ptr = (unsigned char *) facilities; + + if (nr >= MAX_FACILITY_BIT) + return; + ptr[nr >> 3] |= 0x80 >> (nr & 7); +} + +static inline void __clear_facility(unsigned long nr, void *facilities) +{ + unsigned char *ptr = (unsigned char *) facilities; + + if (nr >= MAX_FACILITY_BIT) + return; + ptr[nr >> 3] &= ~(0x80 >> (nr & 7)); +} + static inline int __test_facility(unsigned long nr, void *facilities) { unsigned char *ptr; --- a/arch/s390/include/asm/lowcore.h +++ b/arch/s390/include/asm/lowcore.h @@ -150,7 +150,8 @@ struct lowcore { __u8 pad_0x0e20[0x0f00-0x0e20]; /* 0x0e20 */ /* Extended facility list */ - __u64 stfle_fac_list[32]; /* 0x0f00 */ + __u64 stfle_fac_list[16]; /* 0x0f00 */ + __u64 alt_stfle_fac_list[16]; /* 0x0f80 */ __u8 pad_0x1000[0x11b0-0x1000]; /* 0x1000 */ /* Pointer to vector register save area */ --- a/arch/s390/kernel/alternative.c +++ b/arch/s390/kernel/alternative.c @@ -74,7 +74,8 @@ static void __init_or_module __apply_alt instr = (u8 *)&a->instr_offset + a->instr_offset; replacement = (u8 *)&a->repl_offset + a->repl_offset; - if (!test_facility(a->facility)) + if (!__test_facility(a->facility, + S390_lowcore.alt_stfle_fac_list)) continue; if (unlikely(a->instrlen % 2 || a->replacementlen % 2)) { --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -299,6 +299,9 @@ static noinline __init void setup_facili { stfle(S390_lowcore.stfle_fac_list, ARRAY_SIZE(S390_lowcore.stfle_fac_list)); + memcpy(S390_lowcore.alt_stfle_fac_list, + S390_lowcore.stfle_fac_list, + sizeof(S390_lowcore.alt_stfle_fac_list)); } static __init void detect_diag9c(void) --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -336,7 +336,9 @@ static void __init setup_lowcore(void) lc->machine_flags = S390_lowcore.machine_flags; lc->stfl_fac_list = S390_lowcore.stfl_fac_list; memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, - MAX_FACILITY_BIT/8); + sizeof(lc->stfle_fac_list)); + memcpy(lc->alt_stfle_fac_list, S390_lowcore.alt_stfle_fac_list, + sizeof(lc->alt_stfle_fac_list)); if (MACHINE_HAS_VX) lc->vector_save_area_addr = (unsigned long) &lc->vector_save_area; --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -253,7 +253,9 @@ static void pcpu_prepare_secondary(struc __ctl_store(lc->cregs_save_area, 0, 15); save_access_regs((unsigned int *) lc->access_regs_save_area); memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, - MAX_FACILITY_BIT/8); + sizeof(lc->stfle_fac_list)); + memcpy(lc->alt_stfle_fac_list, S390_lowcore.alt_stfle_fac_list, + sizeof(lc->alt_stfle_fac_list)); } static void pcpu_attach_task(struct pcpu *pcpu, struct task_struct *tsk)