From: Ard Biesheuvel <ardb@kernel.org>
To: Linux ARM <linux-arm-kernel@lists.infradead.org>,
James Morse <james.morse@arm.com>
Cc: ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Sudeep Holla <sudeep.holla@arm.com>,
Kernel Hardening <kernel-hardening@lists.openwall.com>
Subject: Re: [PATCH v3 0/2] arm64/acpi: restrict AML opregion memory access
Date: Wed, 8 Jul 2020 19:17:08 +0300 [thread overview]
Message-ID: <CAMj1kXGMhmsJmwog6iC+r5Nhyx9QwQkbNdUPSD+UbgZyNvtyzQ@mail.gmail.com> (raw)
In-Reply-To: <20200626155832.2323789-1-ardb@kernel.org>
(+ James)
On Fri, 26 Jun 2020 at 18:58, Ard Biesheuvel <ardb@kernel.org> wrote:
>
> v2:
> - do a more elaborate check on the region, against the EFI memory map
>
> v3:
> - split into two patches
> - fallback to __ioremap() for ACPI reclaim memory, in case it is not covered
> by the linear mapping (e.g., when booting a kdump kernel)
>
> Ard Biesheuvel (2):
> arm64/acpi: disallow AML memory opregions to access kernel memory
> arm64/acpi: disallow writeable AML opregion mapping for EFI code
> regions
>
With some adult supervision from James (thanks!), I have given this a
spin myself with kexec under QEMU/kvm, to boot a crashkernel, and
everything works as expected.
> arch/arm64/include/asm/acpi.h | 15 +---
> arch/arm64/kernel/acpi.c | 75 ++++++++++++++++++++
> 2 files changed, 76 insertions(+), 14 deletions(-)
>
> --
> 2.27.0
>
next prev parent reply other threads:[~2020-07-08 16:17 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-26 15:58 [PATCH v3 0/2] arm64/acpi: restrict AML opregion memory access Ard Biesheuvel
2020-06-26 15:58 ` [PATCH v3 1/2] arm64/acpi: disallow AML memory opregions to access kernel memory Ard Biesheuvel
2020-09-28 16:02 ` Jonathan Cameron
2020-09-28 16:49 ` Ard Biesheuvel
2020-09-28 17:17 ` Jonathan Cameron
2020-09-29 9:29 ` Ard Biesheuvel
2020-09-30 9:27 ` Jonathan Cameron
2020-09-30 17:19 ` Catalin Marinas
2020-06-26 15:58 ` [PATCH v3 2/2] arm64/acpi: disallow writeable AML opregion mapping for EFI code regions Ard Biesheuvel
2021-02-06 3:11 ` Shawn Guo
2021-02-06 8:10 ` Ard Biesheuvel
2021-02-06 10:17 ` Ard Biesheuvel
2021-02-06 10:45 ` Shawn Guo
2020-07-08 16:17 ` Ard Biesheuvel [this message]
2020-07-09 8:42 ` [PATCH v3 0/2] arm64/acpi: restrict AML opregion memory access Lorenzo Pieralisi
2020-07-14 19:52 ` Catalin Marinas
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