[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] x86/page: Introduce _PAGE_* constants for memory types
commit 1be8707c75bf4ba68447c74e1618b521dd432499 Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> AuthorDate: Thu Jun 9 14:21:38 2022 +0200 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Thu Jun 9 14:21:38 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> --- xen/arch/x86/include/asm/page.h | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/xen/arch/x86/include/asm/page.h b/xen/arch/x86/include/asm/page.h index 447491cd09..b585235d06 100644 --- a/xen/arch/x86/include/asm/page.h +++ b/xen/arch/x86/include/asm/page.h @@ -331,6 +331,14 @@ 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 @@ -349,10 +357,10 @@ 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_WT (__PAGE_HYPERVISOR | _PAGE_PWT) -#define __PAGE_HYPERVISOR_UCMINUS (__PAGE_HYPERVISOR | _PAGE_PCD) -#define __PAGE_HYPERVISOR_UC (__PAGE_HYPERVISOR | _PAGE_PCD | _PAGE_PWT) -#define __PAGE_HYPERVISOR_WC (__PAGE_HYPERVISOR | _PAGE_PAT) +#define __PAGE_HYPERVISOR_WT (__PAGE_HYPERVISOR | _PAGE_WT) +#define __PAGE_HYPERVISOR_UCMINUS (__PAGE_HYPERVISOR | _PAGE_UCM) +#define __PAGE_HYPERVISOR_UC (__PAGE_HYPERVISOR | _PAGE_UC) +#define __PAGE_HYPERVISOR_WC (__PAGE_HYPERVISOR | _PAGE_WC) #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#master
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