From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752433AbdLHAkJ (ORCPT ); Thu, 7 Dec 2017 19:40:09 -0500 Received: from mail-oi0-f66.google.com ([209.85.218.66]:40538 "EHLO mail-oi0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751020AbdLHAkI (ORCPT ); Thu, 7 Dec 2017 19:40:08 -0500 X-Google-Smtp-Source: AGs4zMaqHOma/uNLVVdigZACdowcoUQwPdWhKDMX7EoRO/H/G3Vz77nn1tqnHD9sN1vHtwfCzbi5FQ== Subject: Re: [PATCH v3 00/20] arm64: Unmap the kernel whilst running in userspace (KPTI) To: Will Deacon , linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, ard.biesheuvel@linaro.org, sboyd@codeaurora.org, dave.hansen@linux.intel.com, keescook@chromium.org, msalter@redhat.com, tglx@linutronix.de References: <1512563739-25239-1-git-send-email-will.deacon@arm.com> From: Laura Abbott Message-ID: <2eda3880-4542-1572-f680-9aeb820abcef@redhat.com> Date: Thu, 7 Dec 2017 16:40:05 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <1512563739-25239-1-git-send-email-will.deacon@arm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/06/2017 04:35 AM, Will Deacon wrote: > Hi everybody, > > This is version three of the patches formerly known as KAISER (♔). > > v1: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-November/542751.html > v2: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-November/544817.html > > Changes since v2 include: > > * Rename command-line option from "kaiser=" to "kpti=" for parity with x86 > * Fixed Falkor erratum workaround (missing '~') > * Moved vectors base from literal pool into separate data page > * Added TTBR_ASID_MASK instead of open-coded constants > * Added missing newline to error message > * Fail to probe SPE if KPTI is enabled > * Addressed minor review comments > * Added tags > * Based on -rc2 > > Patches are also pushed here: > > git://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git kpti > > Feedback and testing welcome. At this point, I'd like to start thinking > about getting this merged for 4.16. > You can add Tested-by: Laura Abbott > Cheers, > > Will > > --->8 > > Will Deacon (20): > arm64: mm: Use non-global mappings for kernel space > arm64: mm: Temporarily disable ARM64_SW_TTBR0_PAN > arm64: mm: Move ASID from TTBR0 to TTBR1 > arm64: mm: Remove pre_ttbr0_update_workaround for Falkor erratum > #E1003 > arm64: mm: Rename post_ttbr0_update_workaround > arm64: mm: Fix and re-enable ARM64_SW_TTBR0_PAN > arm64: mm: Allocate ASIDs in pairs > arm64: mm: Add arm64_kernel_unmapped_at_el0 helper > arm64: mm: Invalidate both kernel and user ASIDs when performing TLBI > arm64: entry: Add exception trampoline page for exceptions from EL0 > arm64: mm: Map entry trampoline into trampoline and kernel page tables > arm64: entry: Explicitly pass exception level to kernel_ventry macro > arm64: entry: Hook up entry trampoline to exception vectors > arm64: erratum: Work around Falkor erratum #E1003 in trampoline code > arm64: tls: Avoid unconditional zeroing of tpidrro_el0 for native > tasks > arm64: entry: Add fake CPU feature for unmapping the kernel at EL0 > arm64: Kconfig: Add CONFIG_UNMAP_KERNEL_AT_EL0 > perf: arm_spe: Fail device probe when arm64_kernel_unmapped_at_el0() > arm64: mm: Introduce TTBR_ASID_MASK for getting at the ASID in the > TTBR > arm64: kaslr: Put kernel vectors address in separate data page > > arch/arm64/Kconfig | 30 +++-- > arch/arm64/include/asm/asm-uaccess.h | 26 ++-- > arch/arm64/include/asm/assembler.h | 27 +---- > arch/arm64/include/asm/cpucaps.h | 3 +- > arch/arm64/include/asm/fixmap.h | 5 + > arch/arm64/include/asm/kernel-pgtable.h | 12 +- > arch/arm64/include/asm/mmu.h | 11 ++ > arch/arm64/include/asm/mmu_context.h | 9 +- > arch/arm64/include/asm/pgtable-hwdef.h | 1 + > arch/arm64/include/asm/pgtable-prot.h | 21 +++- > arch/arm64/include/asm/pgtable.h | 1 + > arch/arm64/include/asm/proc-fns.h | 6 - > arch/arm64/include/asm/tlbflush.h | 16 ++- > arch/arm64/include/asm/uaccess.h | 21 +++- > arch/arm64/kernel/asm-offsets.c | 6 +- > arch/arm64/kernel/cpufeature.c | 41 +++++++ > arch/arm64/kernel/entry.S | 203 +++++++++++++++++++++++++++----- > arch/arm64/kernel/process.c | 12 +- > arch/arm64/kernel/vmlinux.lds.S | 40 ++++++- > arch/arm64/lib/clear_user.S | 2 +- > arch/arm64/lib/copy_from_user.S | 2 +- > arch/arm64/lib/copy_in_user.S | 2 +- > arch/arm64/lib/copy_to_user.S | 2 +- > arch/arm64/mm/cache.S | 2 +- > arch/arm64/mm/context.c | 36 +++--- > arch/arm64/mm/mmu.c | 31 +++++ > arch/arm64/mm/proc.S | 12 +- > arch/arm64/xen/hypercall.S | 2 +- > drivers/perf/arm_spe_pmu.c | 9 ++ > 29 files changed, 454 insertions(+), 137 deletions(-) > From mboxrd@z Thu Jan 1 00:00:00 1970 From: labbott@redhat.com (Laura Abbott) Date: Thu, 7 Dec 2017 16:40:05 -0800 Subject: [PATCH v3 00/20] arm64: Unmap the kernel whilst running in userspace (KPTI) In-Reply-To: <1512563739-25239-1-git-send-email-will.deacon@arm.com> References: <1512563739-25239-1-git-send-email-will.deacon@arm.com> Message-ID: <2eda3880-4542-1572-f680-9aeb820abcef@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 12/06/2017 04:35 AM, Will Deacon wrote: > Hi everybody, > > This is version three of the patches formerly known as KAISER (?). > > v1: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-November/542751.html > v2: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-November/544817.html > > Changes since v2 include: > > * Rename command-line option from "kaiser=" to "kpti=" for parity with x86 > * Fixed Falkor erratum workaround (missing '~') > * Moved vectors base from literal pool into separate data page > * Added TTBR_ASID_MASK instead of open-coded constants > * Added missing newline to error message > * Fail to probe SPE if KPTI is enabled > * Addressed minor review comments > * Added tags > * Based on -rc2 > > Patches are also pushed here: > > git://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git kpti > > Feedback and testing welcome. At this point, I'd like to start thinking > about getting this merged for 4.16. > You can add Tested-by: Laura Abbott > Cheers, > > Will > > --->8 > > Will Deacon (20): > arm64: mm: Use non-global mappings for kernel space > arm64: mm: Temporarily disable ARM64_SW_TTBR0_PAN > arm64: mm: Move ASID from TTBR0 to TTBR1 > arm64: mm: Remove pre_ttbr0_update_workaround for Falkor erratum > #E1003 > arm64: mm: Rename post_ttbr0_update_workaround > arm64: mm: Fix and re-enable ARM64_SW_TTBR0_PAN > arm64: mm: Allocate ASIDs in pairs > arm64: mm: Add arm64_kernel_unmapped_at_el0 helper > arm64: mm: Invalidate both kernel and user ASIDs when performing TLBI > arm64: entry: Add exception trampoline page for exceptions from EL0 > arm64: mm: Map entry trampoline into trampoline and kernel page tables > arm64: entry: Explicitly pass exception level to kernel_ventry macro > arm64: entry: Hook up entry trampoline to exception vectors > arm64: erratum: Work around Falkor erratum #E1003 in trampoline code > arm64: tls: Avoid unconditional zeroing of tpidrro_el0 for native > tasks > arm64: entry: Add fake CPU feature for unmapping the kernel at EL0 > arm64: Kconfig: Add CONFIG_UNMAP_KERNEL_AT_EL0 > perf: arm_spe: Fail device probe when arm64_kernel_unmapped_at_el0() > arm64: mm: Introduce TTBR_ASID_MASK for getting at the ASID in the > TTBR > arm64: kaslr: Put kernel vectors address in separate data page > > arch/arm64/Kconfig | 30 +++-- > arch/arm64/include/asm/asm-uaccess.h | 26 ++-- > arch/arm64/include/asm/assembler.h | 27 +---- > arch/arm64/include/asm/cpucaps.h | 3 +- > arch/arm64/include/asm/fixmap.h | 5 + > arch/arm64/include/asm/kernel-pgtable.h | 12 +- > arch/arm64/include/asm/mmu.h | 11 ++ > arch/arm64/include/asm/mmu_context.h | 9 +- > arch/arm64/include/asm/pgtable-hwdef.h | 1 + > arch/arm64/include/asm/pgtable-prot.h | 21 +++- > arch/arm64/include/asm/pgtable.h | 1 + > arch/arm64/include/asm/proc-fns.h | 6 - > arch/arm64/include/asm/tlbflush.h | 16 ++- > arch/arm64/include/asm/uaccess.h | 21 +++- > arch/arm64/kernel/asm-offsets.c | 6 +- > arch/arm64/kernel/cpufeature.c | 41 +++++++ > arch/arm64/kernel/entry.S | 203 +++++++++++++++++++++++++++----- > arch/arm64/kernel/process.c | 12 +- > arch/arm64/kernel/vmlinux.lds.S | 40 ++++++- > arch/arm64/lib/clear_user.S | 2 +- > arch/arm64/lib/copy_from_user.S | 2 +- > arch/arm64/lib/copy_in_user.S | 2 +- > arch/arm64/lib/copy_to_user.S | 2 +- > arch/arm64/mm/cache.S | 2 +- > arch/arm64/mm/context.c | 36 +++--- > arch/arm64/mm/mmu.c | 31 +++++ > arch/arm64/mm/proc.S | 12 +- > arch/arm64/xen/hypercall.S | 2 +- > drivers/perf/arm_spe_pmu.c | 9 ++ > 29 files changed, 454 insertions(+), 137 deletions(-) >