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[Xen-devel] Re: [PATCH] calling zap_low_mappings breaks xen boot on the
| To: | "Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: [PATCH] calling zap_low_mappings breaks xen boot on the es7000 |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | Thu, 24 May 2007 10:04:53 +0100 |
| Delivery-date: | Thu, 24 May 2007 02:03:20 -0700 |
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| Thread-index: | AceWvpt92gNeWwKxEdy09AAWy6hiGQCvyjGgABwt3PsA5BuyYAAY6zVD |
| Thread-topic: | [PATCH] calling zap_low_mappings breaks xen boot on the es7000 |
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On 23/5/07 22:16, "Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx> wrote: >> Either we should just delay the zap_low_mappings() call, or >> fix your code to map_domain_page()/unmap_domain_page(). How >> late in boot do you need the low mappings? > > This patch delays the zap_low_mappings() call until after the > smp_prepare_cpus call. With this patch, I am able to run Xen on the > ES7000 and a Dell SC 1430. So where is the late low-memory access happening? There's not that much es7000-specific code. It can't be hard to fix properly. If the physical pointer is known to be below 1MB you can just __va() it. If not you may need to use a fixmap, or acpi_map_table, or just __va() only on x86_64. I'd like to keep the zap as early as possible to catch truly erroneous low pointers. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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