From: BALATON Zoltan <balaton@eik.bme.hu>
To: Greg Kurz <groug@kaod.org>
Cc: lvivier@redhat.com, qemu-devel@nongnu.org, qemu-ppc@nongnu.org,
clg@kaod.org, paulus@samba.org, philmd@redhat.com,
David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [PATCH v2 02/10] ppc: Remove stub of PPC970 HID4 implementation
Date: Tue, 7 Jan 2020 19:05:41 +0100 (CET) [thread overview]
Message-ID: <alpine.BSF.2.21.99999.352.2001071900510.93471@zero.eik.bme.hu> (raw)
In-Reply-To: <20200107183638.1c84f172@bahia.lan>
On Tue, 7 Jan 2020, Greg Kurz wrote:
> On Tue, 7 Jan 2020 18:32:15 +0100
> Greg Kurz <groug@kaod.org> wrote:
>
>> On Tue, 7 Jan 2020 15:48:19 +1100
>> David Gibson <david@gibson.dropbear.id.au> wrote:
>>
>>> The PowerPC 970 CPU was a cut-down POWER4, which had hypervisor capability.
>>> However, it can be (and often was) strapped into "Apple mode", where the
>>> hypervisor capabilities were disabled (essentially putting it always in
>>> hypervisor mode).
>
> Isn't it supervisor mode instead of hypervisor mode ?
By the way, do you know if this strapping is hardware or software based?
So is it the firmware that disables it on Apple hardware or is it some CPU
pin connected somewhere on the motherboard or it's within the CPU and
cannot be changed? I wonder if it's theoretically possible to re-enable it
on an Apple G5 or we would likely never see a PowerPC 970 with HV enabled?
Regards,
BALATON Zoltan
next prev parent reply other threads:[~2020-01-07 18:06 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-07 4:48 [PATCH v2 00/10] target/ppc: Correct some errors with real mode handling David Gibson
2020-01-07 4:48 ` [PATCH v2 01/10] ppc: Drop PPC_EMULATE_32BITS_HYPV stub David Gibson
2020-01-07 12:52 ` Cédric Le Goater
2020-01-07 17:05 ` Greg Kurz
2020-01-07 4:48 ` [PATCH v2 02/10] ppc: Remove stub of PPC970 HID4 implementation David Gibson
2020-01-07 12:51 ` Cédric Le Goater
2020-01-07 17:32 ` Greg Kurz
2020-01-07 17:36 ` Greg Kurz
2020-01-07 18:05 ` BALATON Zoltan [this message]
2020-01-08 1:09 ` David Gibson
2020-01-08 8:29 ` Thomas Huth
2020-01-08 1:08 ` David Gibson
2020-01-08 8:11 ` Greg Kurz
2020-01-08 2:17 ` Paul Mackerras
2020-01-08 13:35 ` Greg Kurz
2020-01-07 4:48 ` [PATCH v2 03/10] target/ppc: Correct handling of real mode accesses with vhyp on hash MMU David Gibson
2020-01-14 10:22 ` Cédric Le Goater
2020-01-07 4:48 ` [PATCH v2 04/10] target/ppc: Introduce ppc_hash64_use_vrma() helper David Gibson
2020-01-07 13:24 ` Cédric Le Goater
2020-01-07 4:48 ` [PATCH v2 05/10] spapr, ppc: Remove VPM0/RMLS hacks for POWER9 David Gibson
2020-01-07 14:35 ` Cédric Le Goater
2020-01-09 7:33 ` Alexey Kardashevskiy
2020-01-13 3:38 ` David Gibson
2020-01-07 4:48 ` [PATCH v2 06/10] target/ppc: Remove RMOR register from POWER9 & POWER10 David Gibson
2020-01-07 13:39 ` Cédric Le Goater
2020-01-07 4:48 ` [PATCH v2 07/10] target/ppc: Use class fields to simplify LPCR masking David Gibson
2020-01-07 13:41 ` Cédric Le Goater
2020-01-07 4:48 ` [PATCH v2 08/10] target/ppc: Streamline calculation of RMA limit from LPCR[RMLS] David Gibson
2020-01-07 13:43 ` Cédric Le Goater
2020-01-07 4:48 ` [PATCH v2 09/10] target/ppc: Correct RMLS table David Gibson
2020-01-07 14:21 ` Cédric Le Goater
2020-01-08 1:06 ` David Gibson
2020-01-08 8:29 ` Cédric Le Goater
2020-01-09 7:46 ` Alexey Kardashevskiy
2020-01-13 3:46 ` David Gibson
2020-01-08 8:28 ` Cédric Le Goater
2020-01-07 4:48 ` [PATCH v2 10/10] target/ppc: Only calculate RMLS derived RMA limit on demand David Gibson
2020-01-08 8:31 ` Cédric Le Goater
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