From: Marc Zyngier <maz@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
linux-arch@vger.kernel.org, Will Deacon <will@kernel.org>,
Dave P Martin <Dave.Martin@arm.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Szabolcs Nagy <szabolcs.nagy@arm.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
Andrey Konovalov <andreyknvl@google.com>,
Peter Collingbourne <pcc@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Steven Price <steven.price@arm.com>
Subject: Re: [PATCH v9 04/29] arm64: kvm: mte: Hide the MTE CPUID information from the guests
Date: Fri, 04 Sep 2020 11:46:56 +0100 [thread overview]
Message-ID: <87r1rh7ra7.wl-maz@kernel.org> (raw)
In-Reply-To: <20200904103029.32083-5-catalin.marinas@arm.com>
On Fri, 04 Sep 2020 11:30:04 +0100,
Catalin Marinas <catalin.marinas@arm.com> wrote:
>
> KVM does not support MTE in guests yet, so clear the corresponding field
> in the ID_AA64PFR1_EL1 register. In addition, inject an undefined
> exception in the guest if it accesses one of the GCR_EL1, RGSR_EL1,
> TFSR_EL1 or TFSRE0_EL1 registers. While the emulate_sys_reg() function
> already injects an undefined exception, this patch prevents the
> unnecessary printk.
>
> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Marc Zyngier <maz@kernel.org>
> Cc: Steven Price <steven.price@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2020-09-04 10:47 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-04 10:30 [PATCH v9 00/29] arm64: Memory Tagging Extension user-space support Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 01/29] arm64: mte: system register definitions Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 02/29] arm64: mte: Use Normal Tagged attributes for the linear map Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 03/29] arm64: mte: CPU feature detection and initial sysreg configuration Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 04/29] arm64: kvm: mte: Hide the MTE CPUID information from the guests Catalin Marinas
2020-09-04 10:46 ` Marc Zyngier [this message]
2020-09-04 10:30 ` [PATCH v9 05/29] arm64: mte: Add specific SIGSEGV codes Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 06/29] arm64: mte: Handle synchronous and asynchronous tag check faults Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 07/29] mm: Add PG_arch_2 page flag Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 08/29] mm: Preserve the PG_arch_2 flag in __split_huge_page_tail() Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 09/29] arm64: mte: Clear the tags when a page is mapped in user-space with PROT_MTE Catalin Marinas
2020-09-10 10:23 ` Steven Price
2020-09-10 10:52 ` Catalin Marinas
2020-09-10 11:12 ` Steven Price
2020-09-10 11:55 ` Catalin Marinas
2020-09-10 12:43 ` Steven Price
2020-09-04 10:30 ` [PATCH v9 10/29] arm64: mte: Tags-aware copy_{user_,}highpage() implementations Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 11/29] arm64: Avoid unnecessary clear_user_page() indirection Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 12/29] arm64: mte: Tags-aware aware memcmp_pages() implementation Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 13/29] mm: Introduce arch_calc_vm_flag_bits() Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 14/29] arm64: mte: Add PROT_MTE support to mmap() and mprotect() Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 15/29] mm: Introduce arch_validate_flags() Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 16/29] arm64: mte: Validate the PROT_MTE request via arch_validate_flags() Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 17/29] mm: Allow arm64 mmap(PROT_MTE) on RAM-based files Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 18/29] arm64: mte: Allow user control of the tag check mode via prctl() Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 19/29] arm64: mte: Allow user control of the generated random tags " Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 20/29] arm64: mte: Restore the GCR_EL1 register after a suspend Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 21/29] arm64: mte: Allow {set,get}_tagged_addr_ctrl() on non-current tasks Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 22/29] arm64: mte: ptrace: Add PTRACE_{PEEK,POKE}MTETAGS support Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 23/29] arm64: mte: ptrace: Add NT_ARM_TAGGED_ADDR_CTRL regset Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 24/29] fs: Handle intra-page faults in copy_mount_options() Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 25/29] mm: Add arch hooks for saving/restoring tags Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 26/29] arm64: mte: Enable swap of tagged pages Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 27/29] arm64: mte: Save tags when hibernating Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 28/29] arm64: mte: Kconfig entry Catalin Marinas
2020-09-04 10:30 ` [PATCH v9 29/29] arm64: mte: Add Memory Tagging Extension documentation Catalin Marinas
2020-09-17 8:11 ` Will Deacon
2020-09-17 9:02 ` Catalin Marinas
2020-09-17 16:15 ` Dave Martin
2020-09-18 8:30 ` Will Deacon
2020-10-14 23:43 ` Peter Collingbourne
2020-10-15 8:57 ` Will Deacon
2020-10-15 11:14 ` Szabolcs Nagy
2020-09-22 16:04 ` Catalin Marinas
2020-09-22 15:52 ` Szabolcs Nagy
2020-09-22 16:55 ` Catalin Marinas
2020-09-23 9:10 ` Szabolcs Nagy
2020-09-22 12:22 ` Andrey Konovalov
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