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Date: Fri, 17 Jul 2015 06:51:21 +0200 From: Juergen Gross <jgross@...e.com> To: linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com, konrad.wilk@...cle.com, david.vrabel@...rix.com, boris.ostrovsky@...cle.com Cc: Juergen Gross <jgross@...e.com> Subject: [Patch V6 00/16] xen: support pv-domains larger than 512GB Support 64 bit pv-domains with more than 512GB of memory. Following test have been done: - 64 bit dom0 on 8GB machine - 64 bit dom0 on 1TB machine (resolving p2m/E820-map conflict) - 32 bit dom0 on 8GB machine - 64 bit dom0 on 8GB machine with faked kernel/E820-map conflict - 64 bit dom0 on 8GB machine with faked pgtable/E820-map conflict - 64 bit dom0 on 8GB machine with faked initrd/E820-map conflict - 64 bit dom0 on 8GB machine with faked p2m/E820-map conflict - 64 bit domU (sizes up to 900GB) - 32 bit domU Changes in V6: - modify patch 13 as suggested by Konrad Wilk: reserve xenstore page if mfn is not 0, instead of relying on not being initial domain Changes in V5: - support architectures with undefined KERNEL_PAGE_RO in patch 12 - correct memblock_reserve() area of kernel page tables on 32 bit - add some more comments in patch 1 - some modifications in patch 13 (memblock_reserve for shared_info removed, for xenstore only necessary if not dom0) Changes in V4: - new patch 13 (add explicit memblock_reserve() calls for special pages) Changes in V3: - rename xen_chk_e820_reserved() to xen_is_e820_reserved() as requested by David Vrabel - add __initdata tag to global variables in patch 10 - move initrd conflict checking after reserving p2m memory (patch 11) Changes in V2: - some clarifications and better explanations in commit messages - add header changes of include/xen/interface/xen.h (patch 01) - add wmb() when incrementing p2m_generation (patch 02) - add new patch 03 (don't build mfn tree if tools don't need it) - add new patch 06 (split counting of extra memory pages from remapping) - add new patch 07 (check memory area against e820 map) - replace early_iounmap() with early_memunmap() (patch 07->patch 08) - rework patch 09 (check for kernel memory conflicting with memory layout) - rework patch 10 (check pre-allocated page tables for conflict with memory map) - combine old patches 08 and 11 into patch 11 - add new patch 12 (provide early_memremap_ro to establish read-only mapping) - rework old patch 12 (if p2m list located in to be remapped region delay remapping) to copy p2m list in case of a conflict (now patch 13) - correct Kconfig dependency (patch 13->14) - don't limit dom0 to 512GB (patch 13->14) - modify parameter parsing to work in very early boot (patch 13->14) - add new patch 15 to do some cleanup - remove old patch 05 (simplify xen_set_identity_and_remap() by using global variables) - remove old patch 08 (detect pre-allocated memory interfering with e820 map) Juergen Gross (16): xen: sync with xen headers xen: save linear p2m list address in shared info structure xen: don't build mfn tree if tools don't need it xen: eliminate scalability issues from initial mapping setup xen: move static e820 map to global scope xen: split counting of extra memory pages from remapping xen: check memory area against e820 map xen: find unused contiguous memory area xen: check for kernel memory conflicting with memory layout xen: check pre-allocated page tables for conflict with memory map xen: check for initrd conflicting with e820 map mm: provide early_memremap_ro to establish read-only mapping xen: add explicit memblock_reserve() calls for special pages xen: move p2m list if conflicting with e820 map xen: allow more than 512 GB of RAM for 64 bit pv-domains xen: remove no longer needed p2m.h Documentation/kernel-parameters.txt | 7 + arch/x86/include/asm/xen/interface.h | 96 +++++++- arch/x86/include/asm/xen/page.h | 8 +- arch/x86/xen/Kconfig | 20 +- arch/x86/xen/enlighten.c | 4 +- arch/x86/xen/mmu.c | 399 ++++++++++++++++++++++++++++++--- arch/x86/xen/p2m.c | 43 +++- arch/x86/xen/p2m.h | 15 -- arch/x86/xen/setup.c | 414 ++++++++++++++++++++++++++--------- arch/x86/xen/xen-head.S | 2 + arch/x86/xen/xen-ops.h | 7 + include/asm-generic/early_ioremap.h | 2 + include/asm-generic/fixmap.h | 3 + include/xen/interface/xen.h | 35 +-- mm/early_ioremap.c | 12 + 15 files changed, 869 insertions(+), 198 deletions(-) delete mode 100644 arch/x86/xen/p2m.h -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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