[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen staging-4.15] x86/page: Introduce _PAGE_* constants for memory types
commit 887b5ff2938ae256aa14df751816d830b5152d49 Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> AuthorDate: Thu Jun 9 15:35:40 2022 +0200 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Thu Jun 9 15:35:40 2022 +0200 x86/page: Introduce _PAGE_* constants for memory types ... rather than opencoding the PAT/PCD/PWT attributes in __PAGE_HYPERVISOR_* constants. These are going to be needed by forthcoming logic. No functional change. This is part of XSA-402. Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx> master commit: 1be8707c75bf4ba68447c74e1618b521dd432499 master date: 2022-06-09 14:21:38 +0200 --- xen/include/asm-x86/page.h | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/xen/include/asm-x86/page.h b/xen/include/asm-x86/page.h index 4c7f2cb70c..534bc1f403 100644 --- a/xen/include/asm-x86/page.h +++ b/xen/include/asm-x86/page.h @@ -336,6 +336,14 @@ void efi_update_l4_pgtable(unsigned int l4idx, l4_pgentry_t); #define PAGE_CACHE_ATTRS (_PAGE_PAT | _PAGE_PCD | _PAGE_PWT) +/* Memory types, encoded under Xen's choice of MSR_PAT. */ +#define _PAGE_WB ( 0) +#define _PAGE_WT ( _PAGE_PWT) +#define _PAGE_UCM ( _PAGE_PCD ) +#define _PAGE_UC ( _PAGE_PCD | _PAGE_PWT) +#define _PAGE_WC (_PAGE_PAT ) +#define _PAGE_WP (_PAGE_PAT | _PAGE_PWT) + /* * Debug option: Ensure that granted mappings are not implicitly unmapped. * WARNING: This will need to be disabled to run OSes that use the spare PTE @@ -354,8 +362,8 @@ void efi_update_l4_pgtable(unsigned int l4idx, l4_pgentry_t); #define __PAGE_HYPERVISOR_RX (_PAGE_PRESENT | _PAGE_ACCESSED) #define __PAGE_HYPERVISOR (__PAGE_HYPERVISOR_RX | \ _PAGE_DIRTY | _PAGE_RW) -#define __PAGE_HYPERVISOR_UCMINUS (__PAGE_HYPERVISOR | _PAGE_PCD) -#define __PAGE_HYPERVISOR_UC (__PAGE_HYPERVISOR | _PAGE_PCD | _PAGE_PWT) +#define __PAGE_HYPERVISOR_UCMINUS (__PAGE_HYPERVISOR | _PAGE_UCM) +#define __PAGE_HYPERVISOR_UC (__PAGE_HYPERVISOR | _PAGE_UC) #define __PAGE_HYPERVISOR_SHSTK (__PAGE_HYPERVISOR_RO | _PAGE_DIRTY) #define MAP_SMALL_PAGES _PAGE_AVAIL0 /* don't use superpages mappings */ -- generated by git-patchbot for /home/xen/git/xen.git#staging-4.15
|
![]() |
Lists.xenproject.org is hosted with RackSpace, monitoring our |