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From: Michael Ellerman <mpe@ellerman.id.au>
To: Suraj Jitindar Singh <sjitindarsingh@gmail.com>,
	linuxppc-dev@lists.ozlabs.org
Cc: kvm-ppc@vger.kernel.org, benh@kernel.crashing.org,
	paulus@samba.org, agraf@suse.com,
	Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Subject: Re: [PATCH V3 1/2] powerpc: Define new ISA v3.00 logical PVR value and PCR register value
Date: Tue, 08 Nov 2016 19:21:21 +1100	[thread overview]
Message-ID: <87y40ujsam.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <1477975263-29045-2-git-send-email-sjitindarsingh@gmail.com>

Suraj Jitindar Singh <sjitindarsingh@gmail.com> writes:

> ISA 3.00 adds the logical PVR value 0x0f000005, so add a definition for
> this.
>
> Define PCR_ARCH_207 to reflect ISA 2.07 compatibility mode in the processor
> compatibility register (PCR). Also define a dummy ISA 3.00 compatibility
> mode PCR_ARCH_300 to be used in the next patch to help with determining the
> PCR value.

What's "dummy" about the PCR value?

AFAICS that value is reserved in the ISA.

Are we assuming/hoping that ISA 4.0 will use 0x10 to mean ISA 3.0 ?

cheers

WARNING: multiple messages have this Message-ID (diff)
From: Michael Ellerman <mpe@ellerman.id.au>
To: Suraj Jitindar Singh <sjitindarsingh@gmail.com>,
	linuxppc-dev@lists.ozlabs.org
Cc: kvm-ppc@vger.kernel.org, benh@kernel.crashing.org,
	paulus@samba.org, agraf@suse.com,
	Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Subject: Re: [PATCH V3 1/2] powerpc: Define new ISA v3.00 logical PVR value and PCR register value
Date: Tue, 08 Nov 2016 08:21:21 +0000	[thread overview]
Message-ID: <87y40ujsam.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <1477975263-29045-2-git-send-email-sjitindarsingh@gmail.com>

Suraj Jitindar Singh <sjitindarsingh@gmail.com> writes:

> ISA 3.00 adds the logical PVR value 0x0f000005, so add a definition for
> this.
>
> Define PCR_ARCH_207 to reflect ISA 2.07 compatibility mode in the processor
> compatibility register (PCR). Also define a dummy ISA 3.00 compatibility
> mode PCR_ARCH_300 to be used in the next patch to help with determining the
> PCR value.

What's "dummy" about the PCR value?

AFAICS that value is reserved in the ISA.

Are we assuming/hoping that ISA 4.0 will use 0x10 to mean ISA 3.0 ?

cheers

  reply	other threads:[~2016-11-08  8:21 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-01  4:41 [PATCH V3 0/2] powerpc: add support for ISA v2.07 compat level Suraj Jitindar Singh
2016-11-01  4:41 ` Suraj Jitindar Singh
2016-11-01  4:41 ` [PATCH V3 1/2] powerpc: Define new ISA v3.00 logical PVR value and PCR register value Suraj Jitindar Singh
2016-11-01  4:41   ` Suraj Jitindar Singh
2016-11-08  8:21   ` Michael Ellerman [this message]
2016-11-08  8:21     ` Michael Ellerman
2016-11-08 23:18     ` Suraj Jitindar Singh
2016-11-08 23:18       ` Suraj Jitindar Singh
2016-11-10 10:36       ` Michael Ellerman
2016-11-10 10:36         ` Michael Ellerman
2016-11-11  6:11         ` Suraj Jitindar Singh
2016-11-11  6:11           ` Suraj Jitindar Singh
2016-11-01  4:41 ` [PATCH V3 2/2] powerpc/kvm: Update kvmppc_set_arch_compat() for ISA v3.00 Suraj Jitindar Singh
2016-11-01  4:41   ` Suraj Jitindar Singh

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