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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/x86/include/asm/xen/page.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/include/asm/xen/page.h')
-rw-r--r-- | ANDROID_3.4.5/arch/x86/include/asm/xen/page.h | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/ANDROID_3.4.5/arch/x86/include/asm/xen/page.h b/ANDROID_3.4.5/arch/x86/include/asm/xen/page.h deleted file mode 100644 index c34f96c2..00000000 --- a/ANDROID_3.4.5/arch/x86/include/asm/xen/page.h +++ /dev/null @@ -1,213 +0,0 @@ -#ifndef _ASM_X86_XEN_PAGE_H -#define _ASM_X86_XEN_PAGE_H - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/spinlock.h> -#include <linux/pfn.h> -#include <linux/mm.h> - -#include <asm/uaccess.h> -#include <asm/page.h> -#include <asm/pgtable.h> - -#include <xen/interface/xen.h> -#include <xen/grant_table.h> -#include <xen/features.h> - -/* Xen machine address */ -typedef struct xmaddr { - phys_addr_t maddr; -} xmaddr_t; - -/* Xen pseudo-physical address */ -typedef struct xpaddr { - phys_addr_t paddr; -} xpaddr_t; - -#define XMADDR(x) ((xmaddr_t) { .maddr = (x) }) -#define XPADDR(x) ((xpaddr_t) { .paddr = (x) }) - -/**** MACHINE <-> PHYSICAL CONVERSION MACROS ****/ -#define INVALID_P2M_ENTRY (~0UL) -#define FOREIGN_FRAME_BIT (1UL<<(BITS_PER_LONG-1)) -#define IDENTITY_FRAME_BIT (1UL<<(BITS_PER_LONG-2)) -#define FOREIGN_FRAME(m) ((m) | FOREIGN_FRAME_BIT) -#define IDENTITY_FRAME(m) ((m) | IDENTITY_FRAME_BIT) - -/* Maximum amount of memory we can handle in a domain in pages */ -#define MAX_DOMAIN_PAGES \ - ((unsigned long)((u64)CONFIG_XEN_MAX_DOMAIN_MEMORY * 1024 * 1024 * 1024 / PAGE_SIZE)) - -extern unsigned long *machine_to_phys_mapping; -extern unsigned long machine_to_phys_nr; - -extern unsigned long get_phys_to_machine(unsigned long pfn); -extern bool set_phys_to_machine(unsigned long pfn, unsigned long mfn); -extern bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn); -extern unsigned long set_phys_range_identity(unsigned long pfn_s, - unsigned long pfn_e); - -extern int m2p_add_override(unsigned long mfn, struct page *page, - struct gnttab_map_grant_ref *kmap_op); -extern int m2p_remove_override(struct page *page, bool clear_pte); -extern struct page *m2p_find_override(unsigned long mfn); -extern unsigned long m2p_find_override_pfn(unsigned long mfn, unsigned long pfn); - -static inline unsigned long pfn_to_mfn(unsigned long pfn) -{ - unsigned long mfn; - - if (xen_feature(XENFEAT_auto_translated_physmap)) - return pfn; - - mfn = get_phys_to_machine(pfn); - - if (mfn != INVALID_P2M_ENTRY) - mfn &= ~(FOREIGN_FRAME_BIT | IDENTITY_FRAME_BIT); - - return mfn; -} - -static inline int phys_to_machine_mapping_valid(unsigned long pfn) -{ - if (xen_feature(XENFEAT_auto_translated_physmap)) - return 1; - - return get_phys_to_machine(pfn) != INVALID_P2M_ENTRY; -} - -static inline unsigned long mfn_to_pfn(unsigned long mfn) -{ - unsigned long pfn; - int ret = 0; - - if (xen_feature(XENFEAT_auto_translated_physmap)) - return mfn; - - if (unlikely(mfn >= machine_to_phys_nr)) { - pfn = ~0; - goto try_override; - } - pfn = 0; - /* - * The array access can fail (e.g., device space beyond end of RAM). - * In such cases it doesn't matter what we return (we return garbage), - * but we must handle the fault without crashing! - */ - ret = __get_user(pfn, &machine_to_phys_mapping[mfn]); -try_override: - /* ret might be < 0 if there are no entries in the m2p for mfn */ - if (ret < 0) - pfn = ~0; - else if (get_phys_to_machine(pfn) != mfn) - /* - * If this appears to be a foreign mfn (because the pfn - * doesn't map back to the mfn), then check the local override - * table to see if there's a better pfn to use. - * - * m2p_find_override_pfn returns ~0 if it doesn't find anything. - */ - pfn = m2p_find_override_pfn(mfn, ~0); - - /* - * pfn is ~0 if there are no entries in the m2p for mfn or if the - * entry doesn't map back to the mfn and m2p_override doesn't have a - * valid entry for it. - */ - if (pfn == ~0 && - get_phys_to_machine(mfn) == IDENTITY_FRAME(mfn)) - pfn = mfn; - - return pfn; -} - -static inline xmaddr_t phys_to_machine(xpaddr_t phys) -{ - unsigned offset = phys.paddr & ~PAGE_MASK; - return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset); -} - -static inline xpaddr_t machine_to_phys(xmaddr_t machine) -{ - unsigned offset = machine.maddr & ~PAGE_MASK; - return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset); -} - -/* - * We detect special mappings in one of two ways: - * 1. If the MFN is an I/O page then Xen will set the m2p entry - * to be outside our maximum possible pseudophys range. - * 2. If the MFN belongs to a different domain then we will certainly - * not have MFN in our p2m table. Conversely, if the page is ours, - * then we'll have p2m(m2p(MFN))==MFN. - * If we detect a special mapping then it doesn't have a 'struct page'. - * We force !pfn_valid() by returning an out-of-range pointer. - * - * NB. These checks require that, for any MFN that is not in our reservation, - * there is no PFN such that p2m(PFN) == MFN. Otherwise we can get confused if - * we are foreign-mapping the MFN, and the other domain as m2p(MFN) == PFN. - * Yikes! Various places must poke in INVALID_P2M_ENTRY for safety. - * - * NB2. When deliberately mapping foreign pages into the p2m table, you *must* - * use FOREIGN_FRAME(). This will cause pte_pfn() to choke on it, as we - * require. In all the cases we care about, the FOREIGN_FRAME bit is - * masked (e.g., pfn_to_mfn()) so behaviour there is correct. - */ -static inline unsigned long mfn_to_local_pfn(unsigned long mfn) -{ - unsigned long pfn = mfn_to_pfn(mfn); - if (get_phys_to_machine(pfn) != mfn) - return -1; /* force !pfn_valid() */ - return pfn; -} - -/* VIRT <-> MACHINE conversion */ -#define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v)))) -#define virt_to_pfn(v) (PFN_DOWN(__pa(v))) -#define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v))) -#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) - -static inline unsigned long pte_mfn(pte_t pte) -{ - return (pte.pte & PTE_PFN_MASK) >> PAGE_SHIFT; -} - -static inline pte_t mfn_pte(unsigned long page_nr, pgprot_t pgprot) -{ - pte_t pte; - - pte.pte = ((phys_addr_t)page_nr << PAGE_SHIFT) | - massage_pgprot(pgprot); - - return pte; -} - -static inline pteval_t pte_val_ma(pte_t pte) -{ - return pte.pte; -} - -static inline pte_t __pte_ma(pteval_t x) -{ - return (pte_t) { .pte = x }; -} - -#define pmd_val_ma(v) ((v).pmd) -#ifdef __PAGETABLE_PUD_FOLDED -#define pud_val_ma(v) ((v).pgd.pgd) -#else -#define pud_val_ma(v) ((v).pud) -#endif -#define __pmd_ma(x) ((pmd_t) { (x) } ) - -#define pgd_val_ma(x) ((x).pgd) - -void xen_set_domain_pte(pte_t *ptep, pte_t pteval, unsigned domid); - -xmaddr_t arbitrary_virt_to_machine(void *address); -unsigned long arbitrary_virt_to_mfn(void *vaddr); -void make_lowmem_page_readonly(void *vaddr); -void make_lowmem_page_readwrite(void *vaddr); - -#endif /* _ASM_X86_XEN_PAGE_H */ |