From: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
To: Aurelien Jarno <aurelien@aurel32.net>,
Richard Henderson <rth@twiddle.net>
Cc: qemu-devel@nongnu.org, laurent@vivier.eu, bruno@clisp.org,
glaubitz@debian.org
Subject: Re: [Qemu-devel] [PATCH v2 06/27] target/sh4: Handle user-space atomics
Date: Sun, 16 Jul 2017 00:16:25 +0200 [thread overview]
Message-ID: <c45e78e8-007e-4f0d-508d-74c6987a93af@physik.fu-berlin.de> (raw)
In-Reply-To: <20170715221412.3yprwf5i3te4gdxa@aurel32.net>
On 07/16/2017 12:14 AM, Aurelien Jarno wrote:
> Do you have actually have a good documentation about gUSA? I have found
> a few documents (some of them in Japanese), the most complete one being
> the LinuxTag paper. The ABI is also described in the kernel and the
> glibc. That said I am missing the following informations:
> - What kind of instructions are allowed in the atomic sequence? Your
> patch takes into account branches, but are there allowed? used in
> practice? What about FP instructions?
> - Does the atomic sequence is actually allowed to cross pages?
> - Is there any alignement required? The paper mention adding a nop to
> gUSA_exchange_and_add to align the end point to 4 bytes.
The best person to answer this is Yutaka Niibe as he is actually the
person who came up with the design. I'll drop him a message and see
if he can join the discussion.
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@debian.org
`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
next prev parent reply other threads:[~2017-07-15 22:16 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-07 2:20 [Qemu-devel] [PATCH v2 00/27] target/sh4 improvements Richard Henderson
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 01/27] target/sh4: Use cmpxchg for movco Richard Henderson
2017-07-15 23:22 ` Aurelien Jarno
2017-07-16 21:55 ` Aurelien Jarno
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 02/27] target/sh4: Consolidate end-of-TB tests Richard Henderson
2017-07-07 21:42 ` Aurelien Jarno
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 03/27] target/sh4: Introduce TB_FLAG_ENVFLAGS_MASK Richard Henderson
2017-07-07 21:42 ` Aurelien Jarno
2017-07-08 16:29 ` Philippe Mathieu-Daudé
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 04/27] target/sh4: Keep env->flags clean Richard Henderson
2017-07-07 21:42 ` Aurelien Jarno
2017-07-08 16:31 ` Philippe Mathieu-Daudé
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 05/27] target/sh4: Adjust TB_FLAG_PENDING_MOVCA Richard Henderson
2017-07-07 21:42 ` Aurelien Jarno
2017-07-08 16:31 ` Philippe Mathieu-Daudé
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 06/27] target/sh4: Handle user-space atomics Richard Henderson
2017-07-15 22:14 ` Aurelien Jarno
2017-07-15 22:16 ` John Paul Adrian Glaubitz [this message]
2017-07-16 2:30 ` Richard Henderson
2017-07-16 15:18 ` Aurelien Jarno
2017-07-16 19:35 ` Richard Henderson
2017-07-16 21:43 ` Aurelien Jarno
2017-07-16 21:59 ` Richard Henderson
2017-07-16 22:16 ` Aurelien Jarno
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 07/27] target/sh4: Recognize common gUSA sequences Richard Henderson
2017-07-17 14:10 ` Aurelien Jarno
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 08/27] linux-user/sh4: Notice gUSA regions during signal delivery Richard Henderson
2017-07-07 7:25 ` John Paul Adrian Glaubitz
2017-07-07 8:20 ` Richard Henderson
2017-07-07 8:30 ` John Paul Adrian Glaubitz
2017-07-07 8:35 ` John Paul Adrian Glaubitz
2017-07-07 16:22 ` Richard Henderson
2017-07-13 9:09 ` John Paul Adrian Glaubitz
2017-07-13 10:56 ` John Paul Adrian Glaubitz
2017-07-13 21:37 ` Richard Henderson
2017-07-13 21:42 ` John Paul Adrian Glaubitz
[not found] ` <20170707163826.22631-1-rth@twiddle.net>
2017-07-07 17:57 ` [Qemu-devel] Fwd: [PATCH v2.5] fixup! " Richard Henderson
2017-07-07 19:00 ` Richard Henderson
2017-07-17 14:15 ` Aurelien Jarno
2017-07-07 9:05 ` [Qemu-devel] [PATCH v2 08/27] " Laurent Vivier
2017-07-07 9:09 ` Laurent Vivier
2017-07-07 9:13 ` John Paul Adrian Glaubitz
2017-07-15 22:52 ` Aurelien Jarno
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 09/27] linux-user/sh4: Clean env->flags on signal boundaries Richard Henderson
2017-07-15 22:59 ` Aurelien Jarno
2017-07-16 2:33 ` Richard Henderson
2017-07-16 15:18 ` Aurelien Jarno
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 10/27] target/sh4: Hoist register bank selection Richard Henderson
2017-07-07 21:48 ` Aurelien Jarno
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 11/27] target/sh4: Unify cpu_fregs into FREG Richard Henderson
2017-07-07 21:54 ` Aurelien Jarno
2017-07-08 16:54 ` Philippe Mathieu-Daudé
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 12/27] target/sh4: Pass DisasContext to fpr64 routines Richard Henderson
2017-07-07 21:55 ` Aurelien Jarno
2017-07-08 16:56 ` Philippe Mathieu-Daudé
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 13/27] target/sh4: Hoist fp register bank selection Richard Henderson
2017-07-07 21:57 ` Aurelien Jarno
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 14/27] target/sh4: Eliminate unused XREG macro Richard Henderson
2017-07-07 21:59 ` Aurelien Jarno
2017-07-07 2:20 ` [Qemu-devel] [PATCH v2 15/27] target/sh4: Merge DREG into fpr64 routines Richard Henderson
2017-07-07 22:06 ` Aurelien Jarno
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 16/27] target/sh4: Load/store Dr as 64-bit quantities Richard Henderson
2017-07-07 22:14 ` Aurelien Jarno
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 17/27] target/sh4: Simplify 64-bit fp reg-reg move Richard Henderson
2017-07-07 22:15 ` Aurelien Jarno
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 18/27] target/sh4: Unify code for CHECK_NOT_DELAY_SLOT Richard Henderson
2017-07-07 22:17 ` Aurelien Jarno
2017-07-08 16:59 ` Philippe Mathieu-Daudé
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 19/27] target/sh4: Unify code for CHECK_PRIVILEGED Richard Henderson
2017-07-07 22:17 ` Aurelien Jarno
2017-07-08 17:00 ` Philippe Mathieu-Daudé
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 20/27] target/sh4: Unify code for CHECK_FPU_ENABLED Richard Henderson
2017-07-07 22:18 ` Aurelien Jarno
2017-07-08 17:01 ` Philippe Mathieu-Daudé
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 21/27] target/sh4: Tidy misc illegal insn checks Richard Henderson
2017-07-07 22:18 ` Aurelien Jarno
2017-07-08 17:02 ` Philippe Mathieu-Daudé
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 22/27] target/sh4: Introduce CHECK_FPSCR_PR_* Richard Henderson
2017-07-07 22:20 ` Aurelien Jarno
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 23/27] target/sh4: Introduce CHECK_SH4A Richard Henderson
2017-07-07 22:21 ` Aurelien Jarno
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 24/27] target/sh4: Implement fpchg Richard Henderson
2017-07-07 22:23 ` Aurelien Jarno
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 25/27] target/sh4: Add missing FPSCR.PR == 0 checks Richard Henderson
2017-07-07 22:24 ` Aurelien Jarno
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 26/27] target/sh4: Implement fsrra Richard Henderson
2017-07-07 22:27 ` Aurelien Jarno
2017-07-07 2:21 ` [Qemu-devel] [PATCH v2 27/27] target/sh4: Use tcg_gen_lookup_and_goto_ptr Richard Henderson
2017-07-18 7:51 ` [Qemu-devel] [PATCH v2 00/27] target/sh4 improvements Aurelien Jarno
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