d5d14ed6f2
This change introduces new flags for the hv_install_context() API that passes a page table pointer to the hypervisor. Clients can explicitly request 4K, 16K, or 64K small pages when they install a new context. In practice, the page size is fixed at kernel compile time and the same size is always requested every time a new page table is installed. The <hv/hypervisor.h> header changes so that it provides more abstract macros for managing "page" things like PFNs and page tables. For example there is now a HV_DEFAULT_PAGE_SIZE_SMALL instead of the old HV_PAGE_SIZE_SMALL. The various PFN routines have been eliminated and only PA- or PTFN-based ones remain (since PTFNs are always expressed in fixed 2KB "page" size). The page-table management macros are renamed with a leading underscore and take page-size arguments with the presumption that clients will use those macros in some single place to provide the "real" macros they will use themselves. I happened to notice the old hv_set_caching() API was totally broken (it assumed 4KB pages) so I changed it so it would nominally work correctly with other page sizes. Tag modules with the page size so you can't load a module built with a conflicting page size. (And add a test for SMP while we're at it.) Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* Copyright 2011 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#ifndef _ASM_TILE_MODULE_H
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#define _ASM_TILE_MODULE_H
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#include <arch/chip.h>
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#include <asm-generic/module.h>
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/* We can't use modules built with different page sizes. */
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#if defined(CONFIG_PAGE_SIZE_16KB)
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# define MODULE_PGSZ " 16KB"
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#elif defined(CONFIG_PAGE_SIZE_64KB)
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# define MODULE_PGSZ " 64KB"
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#else
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# define MODULE_PGSZ ""
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#endif
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/* We don't really support no-SMP so tag if someone tries. */
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#ifdef CONFIG_SMP
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#define MODULE_NOSMP ""
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#else
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#define MODULE_NOSMP " nosmp"
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#endif
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#define MODULE_ARCH_VERMAGIC CHIP_ARCH_NAME MODULE_PGSZ MODULE_NOSMP
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#endif /* _ASM_TILE_MODULE_H */
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