From: Ingo Molnar <mingo@elte.hu>
To: John Keller <jpk@sgi.com>
Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
takayoshi.kochi@gmail.com, Yinghai Lu <yhlu.kernel@gmail.com>,
Jesse Barnes <jbarnes@virtuousgeek.org>
Subject: Re: [PATCH] x86: Allow MMCONFIG above 4GB on x86_64
Date: Fri, 18 Jul 2008 14:38:58 +0200 [thread overview]
Message-ID: <20080718123858.GR6875@elte.hu> (raw)
In-Reply-To: <20080709204127.1458.5727.77728@attica.americas.sgi.com>
* John Keller <jpk@sgi.com> wrote:
> SGI UV will have MMCFG base addresses that are greater than 4GB (32
> bits).
> +++ linux-2.6/arch/x86/kernel/acpi/boot.c 2008-07-09 15:25:32.000000000 -0500
> @@ -200,6 +200,7 @@ int __init acpi_parse_mcfg(struct acpi_t
> }
>
> memcpy(pci_mmcfg_config, &mcfg[1], config_size);
> +#ifndef CONFIG_X86_64
> for (i = 0; i < pci_mmcfg_config_num; ++i) {
> if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
> printk(KERN_ERR PREFIX
> @@ -209,6 +210,7 @@ int __init acpi_parse_mcfg(struct acpi_t
> return -ENODEV;
> }
> }
> +#endif
hm. If then it should be enabled very carefully and initially probably
on a per system (i.e. DMI driven whitelist) basis.
Ingo
next prev parent reply other threads:[~2008-07-18 12:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-09 20:41 [PATCH] x86: Allow MMCONFIG above 4GB on x86_64 John Keller
2008-07-09 21:02 ` Yinghai Lu
2008-07-10 7:28 ` Kenji Kaneshige
2008-07-13 15:36 ` Andi Kleen
2008-07-18 12:38 ` Ingo Molnar [this message]
2008-07-18 13:02 ` John Keller
2008-07-18 13:02 ` John Keller
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