From: Petr Beneš <w1benny@gmail.com>
The EPT Paging-write feature (when enabled by the TERTIARY_EXEC_EPT_PAGING_WRITE bit) uses bit 58 of the EPT entry to indicate that guest paging may update the page, even if the W access is not set.
This patch is a preparation for the EPT Paging-write feature.
Signed-off-by: Petr Beneš <w1benny@gmail.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
---
xen/arch/x86/include/asm/hvm/vmx/vmx.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/xen/arch/x86/include/asm/hvm/vmx/vmx.h b/xen/arch/x86/include/asm/hvm/vmx/vmx.h
index f0ec459622..d920de96b7 100644
--- a/xen/arch/x86/include/asm/hvm/vmx/vmx.h
+++ b/xen/arch/x86/include/asm/hvm/vmx/vmx.h
@@ -34,8 +34,8 @@ typedef union {
EPT/VT-d usage */
mfn : 40, /* bits 51:12 - Machine physical frame number */
sa_p2mt : 6, /* bits 57:52 - Software available 2 */
- access : 4, /* bits 61:58 - p2m_access_t */
- _rsvd : 1, /* bit 62 - reserved */
+ pw : 1, /* bit 58 - Paging-write access */
+ access : 4, /* bits 62:59 - p2m_access_t */
suppress_ve : 1; /* bit 63 - suppress #VE */
};
u64 epte;
--
2.34.1