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From: Dominik Brodowski <linux@dominikbrodowski.net>
To: Brian Gerst <brgerst@gmail.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@kernel.org>, Borislav Petkov <bp@alien8.de>,
	"H . Peter Anvin" <hpa@zytor.com>,
	Andy Lutomirski <luto@kernel.org>
Subject: Re: [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native
Date: Fri, 21 Feb 2020 07:07:56 +0100	[thread overview]
Message-ID: <20200221060756.GA3368@light.dominikbrodowski.net> (raw)
In-Reply-To: <20200221050934.719152-1-brgerst@gmail.com>

Brian,

On Fri, Feb 21, 2020 at 12:09:29AM -0500, Brian Gerst wrote:
> This patch series cleans up the x86 syscall wrapper code and converts
> the 32-bit native kernel over to pt_regs based syscalls.

thanks for your patchset. Could you explain a bit more what the rationale
is. Due to asmlinkage, it doesn't leak "random user-provided register
content down the call chain" (as was the case for x86-64). But it may be
cleaner, and you mention in patch 5/5 that the new way is "a bit more
efficient" -- do you have numbers?

Thanks,
	Dominik

  parent reply	other threads:[~2020-02-21  7:07 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-21  5:09 [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Brian Gerst
2020-02-21  5:09 ` [PATCH 1/5] x86: Refactor syscall_wrapper.h Brian Gerst
2020-02-21  6:47   ` Dominik Brodowski
2020-02-21 14:05     ` Brian Gerst
2020-02-21  5:09 ` [PATCH 2/5] x86: Move 32-bit compat syscalls to common location Brian Gerst
2020-02-21  7:07   ` Dominik Brodowski
2020-02-21 13:41     ` Brian Gerst
2020-02-21 15:29       ` Dominik Brodowski
2020-02-21  5:09 ` [PATCH 3/5] x86-32: Enable syscall wrappers Brian Gerst
2020-02-21  7:05   ` Dominik Brodowski
2020-02-21  5:09 ` [PATCH 4/5] x86-64: Use syscall wrappers for x32_rt_sigreturn Brian Gerst
2020-02-21  6:56   ` Dominik Brodowski
2020-02-21  5:09 ` [PATCH 5/5] x86: Drop asmlinkage from syscalls Brian Gerst
2020-02-21  6:56   ` Dominik Brodowski
2020-02-21  6:07 ` Dominik Brodowski [this message]
2020-02-21 13:15   ` [PATCH 0/5] Enable pt_regs based syscalls for x86-32 native Brian Gerst
2020-02-21 15:28     ` Dominik Brodowski

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