From: Richard Henderson <rth@twiddle.net>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: "Rob Herring" <rob.herring@linaro.org>,
"Peter Crosthwaite" <peter.crosthwaite@xilinx.com>,
"Patch Tracking" <patches@linaro.org>,
"Michael Matz" <matz@suse.de>,
"Claudio Fontana" <claudio.fontana@huawei.com>,
"Alexander Graf" <agraf@suse.de>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Will Newton" <will.newton@linaro.org>,
"Dirk Mueller" <dmueller@suse.de>,
"Laurent Desnogues" <laurent.desnogues@gmail.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
"Christoffer Dall" <christoffer.dall@linaro.org>
Subject: Re: [Qemu-devel] [PATCH v4 12/21] target-arm: A64: Implement DC ZVA
Date: Fri, 07 Mar 2014 07:40:27 -0800 [thread overview]
Message-ID: <5319E86B.9070001@twiddle.net> (raw)
In-Reply-To: <CAFEAcA-PyFUeH7Le6UFygL_Z4V3b4ybKKhk4eeiBfaaatiAz8g@mail.gmail.com>
On 03/07/2014 07:11 AM, Peter Maydell wrote:
>> > As a bonus, you'll have accurate exceptions should the access throw, so you
>> > don't need to force the save of PC before calling the helper. Which... I don't
>> > see you doing, so perhaps there's a bug here at the moment.
> Mmm. (In system mode we'll save PC as a side effect of having
> an accessfn defined for the DC_ZVA reginfo.)
Ah, I see it.
I'll note that the GETRA/PC thing can be made to work with any helper. It's
just a matter of passing down the outermost helper's retaddr to
cpu_restore_state. C.f. target-alpha's dynamic_excp/arith_excp functions.
So in theory there's no need for the accessfn to require storing the pc first.
r~
next prev parent reply other threads:[~2014-03-07 15:40 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-06 19:32 [Qemu-devel] [PATCH v4 00/21] AArch64 system emulation (boots a kernel!) Peter Maydell
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 01/21] target-arm: Split out private-to-target functions into internals.h Peter Maydell
2014-03-17 7:13 ` Peter Crosthwaite
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 02/21] target-arm: Implement AArch64 DAIF system register Peter Maydell
2014-03-17 2:30 ` Peter Crosthwaite
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 03/21] target-arm: Define exception record for AArch64 exceptions Peter Maydell
2014-03-17 2:53 ` Peter Crosthwaite
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 04/21] target-arm: Provide correct syndrome information for cpreg access traps Peter Maydell
2014-03-17 3:05 ` Peter Crosthwaite
2014-03-17 12:32 ` Peter Maydell
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 05/21] target-arm: Add support for generating exceptions with syndrome information Peter Maydell
2014-03-17 3:19 ` Peter Crosthwaite
2014-03-17 12:40 ` Peter Maydell
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 06/21] target-arm: Provide syndrome information for MMU faults Peter Maydell
2014-03-17 3:28 ` Peter Crosthwaite
2014-03-17 12:41 ` Peter Maydell
2014-03-17 12:50 ` Peter Maydell
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 07/21] target-arm: A64: Correctly fault FP/Neon if CPACR.FPEN set Peter Maydell
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 08/21] target-arm: A64: Add assertion that FP access was checked Peter Maydell
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 09/21] target-arm: Fix VFP enables for AArch32 EL0 under AArch64 EL1 Peter Maydell
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 10/21] target-arm: Add v8 mmu translation support Peter Maydell
2014-03-20 18:20 ` Peter Maydell
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 11/21] target-arm: Don't mention PMU in debug feature register Peter Maydell
2014-03-17 5:13 ` Peter Crosthwaite
2014-03-17 12:58 ` Peter Maydell
2014-03-17 13:11 ` Peter Crosthwaite
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 12/21] target-arm: A64: Implement DC ZVA Peter Maydell
2014-03-07 14:51 ` Richard Henderson
2014-03-07 15:11 ` Peter Maydell
2014-03-07 15:25 ` Richard Henderson
2014-03-07 15:40 ` Richard Henderson [this message]
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 13/21] target-arm: Use dedicated CPU state fields for ARM946 access bit registers Peter Maydell
2014-03-17 5:20 ` Peter Crosthwaite
2014-03-17 13:03 ` Peter Maydell
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 14/21] target-arm: Implement AArch64 views of fault status and data registers Peter Maydell
2014-03-17 5:30 ` Peter Crosthwaite
2014-03-17 13:06 ` Peter Maydell
2014-03-17 13:17 ` Peter Crosthwaite
2014-03-06 19:32 ` [Qemu-devel] [PATCH v4 15/21] target-arm: Add AArch64 ELR_EL1 register Peter Maydell
2014-03-17 5:33 ` Peter Crosthwaite
2014-03-06 19:33 ` [Qemu-devel] [PATCH v4 16/21] target-arm: Implement SP_EL0, SP_EL1 Peter Maydell
2014-03-17 7:02 ` Peter Crosthwaite
2014-03-17 7:31 ` Peter Crosthwaite
2014-03-20 17:12 ` Peter Maydell
2014-03-06 19:33 ` [Qemu-devel] [PATCH v4 17/21] target-arm: Implement AArch64 SPSR_EL1 Peter Maydell
2014-03-06 19:33 ` [Qemu-devel] [PATCH v4 18/21] target-arm: Move arm_log_exception() into internals.h Peter Maydell
2014-03-17 7:04 ` Peter Crosthwaite
2014-03-06 19:33 ` [Qemu-devel] [PATCH v4 19/21] target-arm: Implement AArch64 EL1 exception handling Peter Maydell
2014-03-06 19:33 ` [Qemu-devel] [PATCH v4 20/21] target-arm: Add Cortex-A57 processor Peter Maydell
2014-03-20 19:18 ` Peter Maydell
2014-03-26 2:34 ` Rob Herring
2014-03-06 19:33 ` [Qemu-devel] [PATCH v4 21/21] hw/arm/virt: Add support for Cortex-A57 Peter Maydell
2014-03-17 7:12 ` Peter Crosthwaite
2014-04-10 15:02 ` Peter Maydell
2014-04-10 19:41 ` Rob Herring
2014-04-10 21:16 ` Peter Maydell
2014-03-07 4:09 ` [Qemu-devel] [PATCH v4 00/21] AArch64 system emulation (boots a kernel!) Xuebing Wang
2014-03-07 8:47 ` Peter Maydell
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