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[v2,1/2] x86: Rename _rsvd field to pw and move it to the bit 58

Message ID bddb36cdf6a8d222fba7d5973512ebfdb86b0c0a.1734652343.git.w1benny@gmail.com (mailing list archive)
State New
Headers show
Series x86: Add Support for Paging-Write Feature | expand

Commit Message

Petr Beneš Dec. 19, 2024, 11:55 p.m. UTC 
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>
---
 xen/arch/x86/include/asm/hvm/vmx/vmx.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

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;