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From: Catalin Marinas <catalin.marinas@arm.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: james.morse@arm.com, will@kernel.org, hch@lst.de,
	linux-arm-kernel@lists.infradead.org, robin.murphy@arm.com
Subject: Re: [PATCHv4 14/17] arm64: uaccess: remove set_fs()
Date: Tue, 17 Nov 2020 11:10:44 +0000	[thread overview]
Message-ID: <X7OvtBhWGcmb+st3@trantor> (raw)
In-Reply-To: <20201117110758.GC73209@C02TD0UTHF1T.local>

On Tue, Nov 17, 2020 at 11:07:58AM +0000, Mark Rutland wrote:
> On Tue, Nov 17, 2020 at 11:02:20AM +0000, Catalin Marinas wrote:
> > Could we apply the same logic to SDEI+PAN?
> 
> I don't think we can; existing TF-A FW will clear PAN (since it
> generates the new PSTATE from scratch), so we need to set PAN explicitly
> to support that.

Ah, you are right, we need PAN set (and UAO clear).

-- 
Catalin

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  reply	other threads:[~2020-11-17 11:11 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-13 12:49 [PATCHv4 00/17] arm64: remove set_fs() and friends Mark Rutland
2020-11-13 12:49 ` [PATCHv4 01/17] arm64: ensure ERET from kthread is illegal Mark Rutland
2020-11-13 12:49 ` [PATCHv4 02/17] arm64: add C wrappers for SET_PSTATE_*() Mark Rutland
2020-11-13 12:49 ` [PATCHv4 03/17] arm64: head.S: rename el2_setup -> init_kernel_el Mark Rutland
2020-11-13 12:49 ` [PATCHv4 04/17] arm64: head.S: cleanup SCTLR_ELx initialization Mark Rutland
2020-11-13 12:49 ` [PATCHv4 05/17] arm64: head.S: always initialize PSTATE Mark Rutland
2020-11-13 12:49 ` [PATCHv4 06/17] arm64: sdei: move uaccess logic to arch/arm64/ Mark Rutland
2020-11-16 17:42   ` Catalin Marinas
2020-11-26 18:42   ` James Morse
2020-11-13 12:49 ` [PATCHv4 07/17] arm64: sdei: explicitly simulate PAN/UAO entry Mark Rutland
2020-11-26 18:42   ` James Morse
2020-12-01 12:14     ` Mark Rutland
2020-11-13 12:49 ` [PATCHv4 08/17] arm64: uaccess: move uao_* alternatives to asm-uaccess.h Mark Rutland
2020-11-14  9:22   ` Christoph Hellwig
2020-11-16 12:25     ` Mark Rutland
2020-11-13 12:49 ` [PATCHv4 09/17] arm64: uaccess: rename privileged uaccess routines Mark Rutland
2020-11-13 12:49 ` [PATCHv4 10/17] arm64: uaccess: simplify __copy_user_flushcache() Mark Rutland
2020-11-13 12:49 ` [PATCHv4 11/17] arm64: uaccess: refactor __{get,put}_user Mark Rutland
2020-11-13 12:49 ` [PATCHv4 12/17] arm64: uaccess: split user/kernel routines Mark Rutland
2020-11-26 18:42   ` James Morse
2020-12-01 11:03     ` Mark Rutland
2020-12-02 12:19       ` Mark Rutland
2020-11-13 12:49 ` [PATCHv4 13/17] arm64: uaccess cleanup macro naming Mark Rutland
2020-11-13 12:49 ` [PATCHv4 14/17] arm64: uaccess: remove set_fs() Mark Rutland
2020-11-16 17:40   ` Catalin Marinas
2020-11-17 10:44     ` Mark Rutland
2020-11-17 10:54       ` Catalin Marinas
2020-11-17 10:57         ` Mark Rutland
2020-11-17 11:02           ` Catalin Marinas
2020-11-17 11:07             ` Mark Rutland
2020-11-17 11:10               ` Catalin Marinas [this message]
2020-11-26 18:42               ` James Morse
2020-11-26 18:42   ` James Morse
2020-12-01 12:30     ` Mark Rutland
2020-11-13 12:49 ` [PATCHv4 15/17] arm64: uaccess: remove addr_limit_user_check() Mark Rutland
2020-11-13 12:49 ` [PATCHv4 16/17] arm64: uaccess: remove redundant PAN toggling Mark Rutland
2020-11-13 12:49 ` [PATCHv4 17/17] arm64: uaccess: remove vestigal UAO support Mark Rutland
2020-11-25 19:10 ` [PATCHv4 00/17] arm64: remove set_fs() and friends Catalin Marinas

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