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patch-0002-x86-mm-shadow-do-not-open-code-PAGE_CACHE_ATTRS.patch
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patch-0002-x86-mm-shadow-do-not-open-code-PAGE_CACHE_ATTRS.patch
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From 6362370d9c50633c16db8e1f50ed564000c4be80 Mon Sep 17 00:00:00 2001
Message-Id: <6362370d9c50633c16db8e1f50ed564000c4be80.1671771766.git.demi@invisiblethingslab.com>
In-Reply-To: <[email protected]>
References: <[email protected]>
From: Demi Marie Obenour <[email protected]>
Date: Tue, 6 Dec 2022 13:55:07 +0100
Subject: [PATCH 02/10] x86/mm/shadow: do not open-code PAGE_CACHE_ATTRS
Cc: Marek Marczykowski-Górecki <[email protected]>
This makes the code easier to understand.
Signed-off-by: Demi Marie Obenour <[email protected]>
Acked-by: Jan Beulich <[email protected]>
---
xen/arch/x86/mm/shadow/multi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/xen/arch/x86/mm/shadow/multi.c b/xen/arch/x86/mm/shadow/multi.c
index 95ff6df5d91e1bcfe6c88a565d61b5c69ff1538f..0792d3fbb4b4940587a68f645eb4177a8317fb41 100644
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -562,7 +562,7 @@ _sh_propagate(struct vcpu *v,
if ( guest_nx_enabled(v) )
pass_thru_flags |= _PAGE_NX_BIT;
if ( level == 1 && !shadow_mode_refcounts(d) && mmio_mfn )
- pass_thru_flags |= _PAGE_PAT | _PAGE_PCD | _PAGE_PWT;
+ pass_thru_flags |= PAGE_CACHE_ATTRS;
sflags = gflags & pass_thru_flags;
/*
@@ -575,7 +575,7 @@ _sh_propagate(struct vcpu *v,
{
int type;
- ASSERT(!(sflags & (_PAGE_PAT | _PAGE_PCD | _PAGE_PWT)));
+ ASSERT(!(sflags & PAGE_CACHE_ATTRS));
/* compute the PAT index for shadow page entry when VT-d is enabled
* and device assigned.
--
Sincerely,
Demi Marie Obenour (she/her/hers)
Invisible Things Lab