From 441385ddb2d851ed30d0aa283e49d1de24147282 Mon Sep 17 00:00:00 2001
From: 4lDO2 <4lDO2@protonmail.com>
Date: Thu, 11 Jul 2024 16:31:03 +0200
Subject: [PATCH] Always map the kernel itself using global pages.

This avoids TLB stalls after context switching, that are very visible
from flamegraphs.
---
 src/arch/x86_64/rmm.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/arch/x86_64/rmm.rs b/src/arch/x86_64/rmm.rs
index 2b9132769d..503fc273ae 100644
--- a/src/arch/x86_64/rmm.rs
+++ b/src/arch/x86_64/rmm.rs
@@ -35,7 +35,7 @@ unsafe fn page_flags<A: Arch>(virt: VirtualAddress) -> PageFlags<A> {
     use crate::kernel_executable_offsets::*;
     let virt_addr = virt.data();
 
-    if virt_addr >= __text_start() && virt_addr < __text_end() {
+    (if virt_addr >= __text_start() && virt_addr < __text_end() {
         // Remap text read-only, execute
         PageFlags::new().execute(true)
     } else if virt_addr >= __rodata_start() && virt_addr < __rodata_end() {
@@ -44,7 +44,8 @@ unsafe fn page_flags<A: Arch>(virt: VirtualAddress) -> PageFlags<A> {
     } else {
         // Remap everything else read-write, no execute
         PageFlags::new().write(true)
-    }
+    })
+    .global(cfg!(not(feature = "pti")))
 }
 
 unsafe fn inner(