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Avoid creating linear mappings with the SHARED flag set

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This commit is contained in:
Ruihan Li
2024-05-28 12:51:34 +08:00
committed by Tate, Hongliang Tian
parent 5687f23b56
commit 28b66c1c8c
1 changed files with 1 additions and 5 deletions
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6
framework/aster-frame/src/trap/handler.rs
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@ -216,7 +216,7 @@ fn handle_kernel_page_fault(f: &TrapFrame) {
// Do the mapping // Do the mapping
let page_table = KERNEL_PAGE_TABLE let page_table = KERNEL_PAGE_TABLE
.get() .get()
.expect("The kernel page table is not initialized when kernel page fault happens"); .expect("kernel page fault: the kernel page table is not initialized");
let vaddr = (page_fault_vaddr as usize).align_down(PAGE_SIZE); let vaddr = (page_fault_vaddr as usize).align_down(PAGE_SIZE);
let paddr = vaddr - LINEAR_MAPPING_BASE_VADDR; let paddr = vaddr - LINEAR_MAPPING_BASE_VADDR;
@ -225,7 +225,6 @@ fn handle_kernel_page_fault(f: &TrapFrame) {
// mapping of physical memory. // mapping of physical memory.
// 2. We map the address to the correct physical page with the correct flags, where the // 2. We map the address to the correct physical page with the correct flags, where the
// correctness follows the semantics of the direct mapping of physical memory. // correctness follows the semantics of the direct mapping of physical memory.
// Do the mapping
unsafe { unsafe {
page_table page_table
.map( .map(
@ -234,10 +233,7 @@ fn handle_kernel_page_fault(f: &TrapFrame) {
PageProperty { PageProperty {
flags: PageFlags::RW, flags: PageFlags::RW,
cache: CachePolicy::Uncacheable, cache: CachePolicy::Uncacheable,
#[cfg(not(feature = "intel_tdx"))]
priv_flags: PrivFlags::GLOBAL, priv_flags: PrivFlags::GLOBAL,
#[cfg(feature = "intel_tdx")]
priv_flags: PrivFlags::SHARED | PrivFlags::GLOBAL,
}, },
) )
.unwrap(); .unwrap();