From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: Nicolas Pitre <nico@fluxnic.net>,
David Brown <davidb@codeaurora.org>,
Catalin Marinas <catalin.marinas@arm.com>,
"Russell King - ARM Linux" <linux@arm.linux.org.uk>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 00/18] ARM: Add support for the Large Physical Address Extensions
Date: Wed, 25 May 2011 13:10:39 +0200 [thread overview]
Message-ID: <201105251310.39609.arnd@arndb.de> (raw)
In-Reply-To: <alpine.LFD.2.00.1105242042340.3207@xanadu.home>
On Wednesday 25 May 2011, Nicolas Pitre wrote:
> > Do you expect non LPAE targets to be able to boot with these changes
> > applied (and LPAE enabled)? I am able to build this tree for the
> > MSM8660 (with a minor patch below), but it fails to boot with LPAE
> > enabled. It seems to work fine with LPAE not enabled.
>
> I wouldn't expect a LPAE kernel to boot on non LPAE capable hardware.
>
> And I don't think we'll ever try to support both LPAE and non-LPAE modes
> in the same kernel binary either since this has implications all over
> the place in core kernel mm code.
Just for information and to complete the picture, what other of these
combinations are possible?
* Non-LPAE kernel on LPAE-capable hardware
* LPAE kernel as KVM guest of LPAE kernel
* non-LPAE kernel as KVM guest of LPAE kernel
* LPAE kernel as KVM guest of non-LPAE kernel
* non-LPAE kernel as KVM guest of non-LPAE kernel on LPAE-enabled hardware
Arnd
next prev parent reply other threads:[~2011-05-25 11:10 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-24 21:39 Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 01/18] ARM: LPAE: Use long long printk format for displaying the pud Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 02/18] ARM: LPAE: add ISBs around MMU enabling code Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 03/18] ARM: LPAE: Use unsigned long for __phys_to_virt and __virt_to_phys Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 04/18] ARM: LPAE: Use PMD_(SHIFT|SIZE|MASK) instead of PGDIR_* Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 05/18] ARM: LPAE: Factor out 2-level page table definitions into separate files Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 06/18] ARM: LPAE: Add (pte|pmd|pgd|pgprot)val_t type definitions as u32 Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 07/18] ARM: LPAE: Use a mask for physical addresses in page table entries Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 08/18] ARM: LPAE: Introduce the 3-level page table format definitions Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 09/18] ARM: LPAE: Page table maintenance for the 3-level format Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 10/18] ARM: LPAE: MMU setup for the 3-level page table format Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 11/18] ARM: LPAE: Invalidate the TLB before freeing the PMD Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 12/18] ARM: LPAE: Add fault handling support Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 13/18] ARM: LPAE: Add context switching support Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 14/18] ARM: LPAE: Add identity mapping support for the 3-level page table format Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 15/18] ARM: LPAE: Use generic dma_addr_t type definition Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 16/18] ARM: LPAE: mark memory banks with start > ULONG_MAX as highmem Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 17/18] ARM: LPAE: add support for ATAG_MEM64 Catalin Marinas
2011-05-24 21:39 ` [PATCH v6 18/18] ARM: LPAE: Add the Kconfig entries Catalin Marinas
2011-05-24 23:56 ` [PATCH v6 00/18] ARM: Add support for the Large Physical Address Extensions David Brown
2011-05-25 0:44 ` Nicolas Pitre
2011-05-25 11:10 ` Arnd Bergmann [this message]
2011-05-25 11:22 ` Catalin Marinas
2011-05-25 12:43 ` Catalin Marinas
2011-05-25 8:33 ` Catalin Marinas
2011-07-01 16:24 ` Catalin Marinas
2011-07-02 12:19 ` Russell King - ARM Linux
2011-07-04 17:23 ` Catalin Marinas
2011-07-08 19:21 ` Russell King - ARM Linux
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