diff options
Diffstat (limited to 'util/x86/x86_page_tables.go')
| -rw-r--r-- | util/x86/x86_page_tables.go | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/util/x86/x86_page_tables.go b/util/x86/x86_page_tables.go index 25ad6a2543..e03edeab19 100644 --- a/util/x86/x86_page_tables.go +++ b/util/x86/x86_page_tables.go @@ -185,16 +185,25 @@ func (cw *cWriter) WritePageEntry(data interface{}) error { return nil } -// This map represents what the IA32_PAT MSR +// This map represents what the IA32_PAT MSR should be at runtime. The indicies +// are what the linux kernel uses. Reserved entries are not used. +// 0 WB : _PAGE_CACHE_MODE_WB +// 1 WC : _PAGE_CACHE_MODE_WC +// 2 UC-: _PAGE_CACHE_MODE_UC_MINUS +// 3 UC : _PAGE_CACHE_MODE_UC +// 4 WB : Reserved +// 5 WP : _PAGE_CACHE_MODE_WP +// 6 UC-: Reserved +// 7 WT : _PAGE_CACHE_MODE_WT +// In order to use WP and WC then the IA32_PAT MSR needs to be updated +// as these are not the power on reset values. var patMsrIndexByType = map[uint]uint{ PAT_WB: 0, - PAT_WT: 1, + PAT_WC: 1, PAT_UCMINUS: 2, PAT_UC: 3, - // In order to use WP and WC then the IA32_PAT MSR needs to be updated - // as these are not the power on reset values. - PAT_WP: 6, - PAT_WC: 7, + PAT_WP: 5, + PAT_WT: 7, } type addressRange struct { |