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Lines 1780-1785
static inline int update_intpte(intpte_t *p,
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| 1780 |
_t ## e_get_intpte(_o), _t ## e_get_intpte(_n), \ |
1780 |
_t ## e_get_intpte(_o), _t ## e_get_intpte(_n), \ |
| 1781 |
(_m), (_v), (_ad)) |
1781 |
(_m), (_v), (_ad)) |
| 1782 |
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1782 |
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1783 |
/* |
| 1784 |
* PTE flags that a guest may change without re-validating the PTE. |
| 1785 |
* All other bits affect translation, caching, or Xen's safety. |
| 1786 |
*/ |
| 1787 |
#define FASTPATH_FLAG_WHITELIST \ |
| 1788 |
(_PAGE_NX_BIT | _PAGE_AVAIL_HIGH | _PAGE_AVAIL | _PAGE_GLOBAL | \ |
| 1789 |
_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_USER) |
| 1790 |
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| 1783 |
/* Update the L1 entry at pl1e to new value nl1e. */ |
1791 |
/* Update the L1 entry at pl1e to new value nl1e. */ |
| 1784 |
static int mod_l1_entry(l1_pgentry_t *pl1e, l1_pgentry_t nl1e, |
1792 |
static int mod_l1_entry(l1_pgentry_t *pl1e, l1_pgentry_t nl1e, |
| 1785 |
unsigned long gl1mfn, int preserve_ad, |
1793 |
unsigned long gl1mfn, int preserve_ad, |
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Lines 1820-1828
static int mod_l1_entry(l1_pgentry_t *pl1e, l1_pgentry_t nl1e,
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| 1820 |
return -EINVAL; |
1828 |
return -EINVAL; |
| 1821 |
} |
1829 |
} |
| 1822 |
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1830 |
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| 1823 |
/* Fast path for identical mapping, r/w, presence, and cachability. */ |
1831 |
/* Fast path for sufficiently-similar mappings. */ |
| 1824 |
if ( !l1e_has_changed(ol1e, nl1e, |
1832 |
if ( !l1e_has_changed(ol1e, nl1e, ~FASTPATH_FLAG_WHITELIST) ) |
| 1825 |
PAGE_CACHE_ATTRS | _PAGE_RW | _PAGE_PRESENT) ) |
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| 1826 |
{ |
1833 |
{ |
| 1827 |
adjust_guest_l1e(nl1e, pt_dom); |
1834 |
adjust_guest_l1e(nl1e, pt_dom); |
| 1828 |
if ( UPDATE_ENTRY(l1, pl1e, ol1e, nl1e, gl1mfn, pt_vcpu, |
1835 |
if ( UPDATE_ENTRY(l1, pl1e, ol1e, nl1e, gl1mfn, pt_vcpu, |
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Lines 1904-1914
static int mod_l2_entry(l2_pgentry_t *pl2e,
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| 1904 |
return -EINVAL; |
1911 |
return -EINVAL; |
| 1905 |
} |
1912 |
} |
| 1906 |
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1913 |
|
| 1907 |
/* Fast path for identical mapping and presence. */ |
1914 |
/* Fast path for sufficiently-similar mappings. */ |
| 1908 |
if ( !l2e_has_changed(ol2e, nl2e, |
1915 |
if ( !l2e_has_changed(ol2e, nl2e, ~FASTPATH_FLAG_WHITELIST) ) |
| 1909 |
unlikely(opt_allow_superpage) |
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| 1910 |
? _PAGE_PSE | _PAGE_RW | _PAGE_PRESENT |
| 1911 |
: _PAGE_PRESENT) ) |
| 1912 |
{ |
1916 |
{ |
| 1913 |
adjust_guest_l2e(nl2e, d); |
1917 |
adjust_guest_l2e(nl2e, d); |
| 1914 |
if ( UPDATE_ENTRY(l2, pl2e, ol2e, nl2e, pfn, vcpu, preserve_ad) ) |
1918 |
if ( UPDATE_ENTRY(l2, pl2e, ol2e, nl2e, pfn, vcpu, preserve_ad) ) |
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Lines 1973-1980
static int mod_l3_entry(l3_pgentry_t *pl3e,
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| 1973 |
return -EINVAL; |
1977 |
return -EINVAL; |
| 1974 |
} |
1978 |
} |
| 1975 |
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1979 |
|
| 1976 |
/* Fast path for identical mapping and presence. */ |
1980 |
/* Fast path for sufficiently-similar mappings. */ |
| 1977 |
if ( !l3e_has_changed(ol3e, nl3e, _PAGE_PRESENT) ) |
1981 |
if ( !l3e_has_changed(ol3e, nl3e, ~FASTPATH_FLAG_WHITELIST) ) |
| 1978 |
{ |
1982 |
{ |
| 1979 |
adjust_guest_l3e(nl3e, d); |
1983 |
adjust_guest_l3e(nl3e, d); |
| 1980 |
rc = UPDATE_ENTRY(l3, pl3e, ol3e, nl3e, pfn, vcpu, preserve_ad); |
1984 |
rc = UPDATE_ENTRY(l3, pl3e, ol3e, nl3e, pfn, vcpu, preserve_ad); |
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Lines 2037-2044
static int mod_l4_entry(l4_pgentry_t *pl4e,
Link Here
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| 2037 |
return -EINVAL; |
2041 |
return -EINVAL; |
| 2038 |
} |
2042 |
} |
| 2039 |
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2043 |
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| 2040 |
/* Fast path for identical mapping and presence. */ |
2044 |
/* Fast path for sufficiently-similar mappings. */ |
| 2041 |
if ( !l4e_has_changed(ol4e, nl4e, _PAGE_PRESENT) ) |
2045 |
if ( !l4e_has_changed(ol4e, nl4e, ~FASTPATH_FLAG_WHITELIST) ) |
| 2042 |
{ |
2046 |
{ |
| 2043 |
adjust_guest_l4e(nl4e, d); |
2047 |
adjust_guest_l4e(nl4e, d); |
| 2044 |
rc = UPDATE_ENTRY(l4, pl4e, ol4e, nl4e, pfn, vcpu, preserve_ad); |
2048 |
rc = UPDATE_ENTRY(l4, pl4e, ol4e, nl4e, pfn, vcpu, preserve_ad); |
