Cherry pick "Update LVBS remap_to_high_canonical layout docs"#996

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Sangho Lee (sangho2) merged 1 commit into from
Jul 2, 2026
Merged

Cherry pick "Update LVBS remap_to_high_canonical layout docs" #996

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8 changes: 4 additions & 4 deletions litebox_platform_lvbs/src/mshv/vtl1_mem_layout.rs
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Original file line numberDiff line numberDiff line change
Expand Up@@ -25,10 +25,10 @@ pub const VTL1_PTE_0_PAGE: usize = 5;
pub const VTL1_KERNEL_STACK_PAGE: usize = VTL1_PTE_0_PAGE + VSM_SK_PTE_PAGES_COUNT;

/// PDPT page for the Phase 1 high-canonical PML4 entry. Placed after the
/// VTL0-reserved special pages (GDT, TSS, PT pages, stack, boot params,
/// cmdline) so that all 8 VTL0 PTE pages remain available for the
/// high-canonical mapping. This page is within the VTL0 identity-mapped
/// 16 MiB region but is otherwise unused memory.
/// VTL0-reserved special pages (GDT, TSS, PT pages, and stack) so that all 8
/// VTL0 PTE pages remain available for the high-canonical mapping. This page
/// is within the VTL0 identity-mapped 16 MiB region but is otherwise unused
/// memory.
pub const VTL1_REMAP_PDPT_PAGE: usize = VTL1_KERNEL_STACK_PAGE + 1;

/// PDE page for the Phase 1 high-canonical mapping. PDE entries point to
Expand Down
28 changes: 14 additions & 14 deletions litebox_runner_lvbs/src/main.rs
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Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -176,16 +176,16 @@ unsafe fn apply_relocations() {
/// │ PML4 (page 2, from VTL0) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [0] → VTL0 PDPT (page 3) ← identity │ kept (harmless) │
/// │ │ [256] → new PDPT (page 16) ← high-canon │ Phase 1 adds │
/// │ │ [256] → new PDPT (page 14) ← high-canon │ Phase 1 adds │
/// │ │ ... │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDPT (page 16) │
/// │ New PDPT (page 14) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pdpt_idx] → new PDE (page 17) │ │
/// │ │ [pdpt_idx] → new PDE (page 15) │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDE (page 17) │
/// │ New PDE (page 15) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pde+0] → VTL0 PTE page 5 (2 MiB, 4KB pgs) │ reused as-is │
/// │ │ [pde+1] → VTL0 PTE page 6 │ │
Expand DownExpand Up@@ -213,7 +213,7 @@ unsafe fn apply_relocations() {
/// │ The entire low half [0, 0x7FFF_FFFF_F000) is now available │
/// │ for user-space (TAs / Linux apps). │
/// │ │
/// │ Reclaim all Phase 1 pages (2–12, 16–17) back to the allocator. │
/// │ Reclaim all Phase 1 pages (2–12, 14–15) back to the allocator. │
/// └─────────────────────────────────────────────────────────────────────┘
/// ```
///
Expand All@@ -229,22 +229,22 @@ unsafe fn apply_relocations() {
/// means the existing PTE pages can be **reused as-is** for the
/// high-canonical mapping; we only need a new PDPT page and a new PDE page.
///
/// The PDPT and PDE pages are allocated from unused memory after the
/// VTL0-reserved special pages (pages 16–17), preserving all 8 PTE pages
/// for the high-canonical mapping and covering the full 16 MiB.
/// The PDPT and PDE pages are allocated from unused memory after the boot
/// stack page (pages 14–15), preserving all 8 PTE pages for the high-canonical
/// mapping and covering the full 16 MiB.
///
/// ## Page table pages used
///
/// | page | constant | purpose |
/// |------|-----------------------|----------------------------------------|
/// | 16 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 17 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
/// | 14 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 15 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
///
/// ## Algorithm
///
/// 1. Compute PML4/PDPT/PDE indices from `memory_base + KERNEL_OFFSET`.
/// 2. Zero and populate a PDPT page (page 16).
/// 3. Zero and populate a PDE page (page 17) pointing to all 8 VTL0 PTE
/// 2. Zero and populate a PDPT page (page 14).
/// 3. Zero and populate a PDE page (page 15) pointing to all 8 VTL0 PTE
/// pages 5–12 (4KB page mappings, no huge pages).
/// 4. Wire PML4 → PDPT → PDE.
/// 5. Flush TLB and jump to `continue_boot` at the high-canonical address.
Expand DownExpand Up@@ -280,12 +280,12 @@ unsafe fn remap_to_high_canonical() -> ! {
let pml4_pa = cr3 & CR3_ADDR_MASK;
let pml4_ptr = pml4_pa as *mut u64;

// Set up the PDPT page (page 16)
// Set up the PDPT page.
let pdpt_page_pa = memory_base + (VTL1_REMAP_PDPT_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
let pdpt_ptr = pdpt_page_pa as *mut u64;
unsafe { core::ptr::write_bytes(pdpt_ptr, 0, ENTRIES_PER_PT_PAGE) };

// Set up the PDE page (page 17)
// Set up the PDE page.
let pde_page_pa = memory_base + (VTL1_REMAP_PDE_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
let pde_ptr = pde_page_pa as *mut u64;
unsafe { core::ptr::write_bytes(pde_ptr, 0, ENTRIES_PER_PT_PAGE) };
Expand Down
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Cherry pick "Update LVBS remap_to_high_canonical layout docs"#996

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 Merged

Sangho Lee (sangho2)
merged 1 commit into

from

Jul 2, 2026
 Merged


Cherry pick "Update LVBS remap_to_high_canonical layout docs"
#996
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8 changes: 4 additions & 4 deletions
litebox_platform_lvbs/src/mshv/vtl1_mem_layout.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,10 +25,10 @@ pub const VTL1_PTE_0_PAGE: usize = 5;
pub const VTL1_KERNEL_STACK_PAGE: usize = VTL1_PTE_0_PAGE + VSM_SK_PTE_PAGES_COUNT;

/// PDPT page for the Phase 1 high-canonical PML4 entry. Placed after the
/// VTL0-reserved special pages (GDT, TSS, PT pages, stack, boot params,
/// cmdline) so that all 8 VTL0 PTE pages remain available for the
/// high-canonical mapping. This page is within the VTL0 identity-mapped
/// 16 MiB region but is otherwise unused memory.
/// VTL0-reserved special pages (GDT, TSS, PT pages, and stack) so that all 8
/// VTL0 PTE pages remain available for the high-canonical mapping. This page
/// is within the VTL0 identity-mapped 16 MiB region but is otherwise unused
/// memory.
pub const VTL1_REMAP_PDPT_PAGE: usize = VTL1_KERNEL_STACK_PAGE + 1;

/// PDE page for the Phase 1 high-canonical mapping. PDE entries point to
Expand Down

28 changes: 14 additions & 14 deletions
litebox_runner_lvbs/src/main.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -176,16 +176,16 @@ unsafe fn apply_relocations() {
/// │ PML4 (page 2, from VTL0) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [0] → VTL0 PDPT (page 3) ← identity │ kept (harmless) │
/// │ │ [256] → new PDPT (page 16) ← high-canon │ Phase 1 adds │
/// │ │ [256] → new PDPT (page 14) ← high-canon │ Phase 1 adds │
/// │ │ ... │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDPT (page 16) │
/// │ New PDPT (page 14) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pdpt_idx] → new PDE (page 17) │ │
/// │ │ [pdpt_idx] → new PDE (page 15) │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDE (page 17) │
/// │ New PDE (page 15) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pde+0] → VTL0 PTE page 5 (2 MiB, 4KB pgs) │ reused as-is │
/// │ │ [pde+1] → VTL0 PTE page 6 │ │
Expand DownExpand Up@@ -213,7 +213,7 @@ unsafe fn apply_relocations() {
/// │ The entire low half [0, 0x7FFF_FFFF_F000) is now available │
/// │ for user-space (TAs / Linux apps). │
/// │ │
/// │ Reclaim all Phase 1 pages (2–12, 16–17) back to the allocator. │
/// │ Reclaim all Phase 1 pages (2–12, 14–15) back to the allocator. │
/// └─────────────────────────────────────────────────────────────────────┘
/// ```
///
Expand All@@ -229,22 +229,22 @@ unsafe fn apply_relocations() {
/// means the existing PTE pages can be **reused as-is** for the
/// high-canonical mapping; we only need a new PDPT page and a new PDE page.
///
/// The PDPT and PDE pages are allocated from unused memory after the
/// VTL0-reserved special pages (pages 16–17), preserving all 8 PTE pages
/// for the high-canonical mapping and covering the full 16 MiB.
/// The PDPT and PDE pages are allocated from unused memory after the boot
/// stack page (pages 14–15), preserving all 8 PTE pages for the high-canonical
/// mapping and covering the full 16 MiB.
///
/// ## Page table pages used
///
/// | page | constant | purpose |
/// |------|-----------------------|----------------------------------------|
/// | 16 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 17 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
/// | 14 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 15 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
///
/// ## Algorithm
///
/// 1. Compute PML4/PDPT/PDE indices from `memory_base + KERNEL_OFFSET`.
/// 2. Zero and populate a PDPT page (page 16).
/// 3. Zero and populate a PDE page (page 17) pointing to all 8 VTL0 PTE
/// 2. Zero and populate a PDPT page (page 14).
/// 3. Zero and populate a PDE page (page 15) pointing to all 8 VTL0 PTE
/// pages 5–12 (4KB page mappings, no huge pages).
/// 4. Wire PML4 → PDPT → PDE.
/// 5. Flush TLB and jump to `continue_boot` at the high-canonical address.
Expand DownExpand Up@@ -280,12 +280,12 @@ unsafe fn remap_to_high_canonical() -> ! {
 let pml4_pa = cr3 & CR3_ADDR_MASK;
 let pml4_ptr = pml4_pa as *mut u64;

 // Set up the PDPT page (page 16)
 // Set up the PDPT page.
 let pdpt_page_pa = memory_base + (VTL1_REMAP_PDPT_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pdpt_ptr = pdpt_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pdpt_ptr, 0, ENTRIES_PER_PT_PAGE) };

 // Set up the PDE page (page 17)
 // Set up the PDE page.
 let pde_page_pa = memory_base + (VTL1_REMAP_PDE_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pde_ptr = pde_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pde_ptr, 0, ENTRIES_PER_PT_PAGE) };
Expand Down

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if (__m === '*' || __re.test(location.href)) {
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(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
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.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Cherry pick "Update LVBS remap_to_high_canonical layout docs"#996

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 Merged

Sangho Lee (sangho2)
merged 1 commit into

from

Jul 2, 2026
 Merged


Cherry pick "Update LVBS remap_to_high_canonical layout docs"
#996
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8 changes: 4 additions & 4 deletions
litebox_platform_lvbs/src/mshv/vtl1_mem_layout.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,10 +25,10 @@ pub const VTL1_PTE_0_PAGE: usize = 5;
pub const VTL1_KERNEL_STACK_PAGE: usize = VTL1_PTE_0_PAGE + VSM_SK_PTE_PAGES_COUNT;

/// PDPT page for the Phase 1 high-canonical PML4 entry. Placed after the
/// VTL0-reserved special pages (GDT, TSS, PT pages, stack, boot params,
/// cmdline) so that all 8 VTL0 PTE pages remain available for the
/// high-canonical mapping. This page is within the VTL0 identity-mapped
/// 16 MiB region but is otherwise unused memory.
/// VTL0-reserved special pages (GDT, TSS, PT pages, and stack) so that all 8
/// VTL0 PTE pages remain available for the high-canonical mapping. This page
/// is within the VTL0 identity-mapped 16 MiB region but is otherwise unused
/// memory.
pub const VTL1_REMAP_PDPT_PAGE: usize = VTL1_KERNEL_STACK_PAGE + 1;

/// PDE page for the Phase 1 high-canonical mapping. PDE entries point to
Expand Down

28 changes: 14 additions & 14 deletions
litebox_runner_lvbs/src/main.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -176,16 +176,16 @@ unsafe fn apply_relocations() {
/// │ PML4 (page 2, from VTL0) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [0] → VTL0 PDPT (page 3) ← identity │ kept (harmless) │
/// │ │ [256] → new PDPT (page 16) ← high-canon │ Phase 1 adds │
/// │ │ [256] → new PDPT (page 14) ← high-canon │ Phase 1 adds │
/// │ │ ... │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDPT (page 16) │
/// │ New PDPT (page 14) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pdpt_idx] → new PDE (page 17) │ │
/// │ │ [pdpt_idx] → new PDE (page 15) │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDE (page 17) │
/// │ New PDE (page 15) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pde+0] → VTL0 PTE page 5 (2 MiB, 4KB pgs) │ reused as-is │
/// │ │ [pde+1] → VTL0 PTE page 6 │ │
Expand DownExpand Up@@ -213,7 +213,7 @@ unsafe fn apply_relocations() {
/// │ The entire low half [0, 0x7FFF_FFFF_F000) is now available │
/// │ for user-space (TAs / Linux apps). │
/// │ │
/// │ Reclaim all Phase 1 pages (2–12, 16–17) back to the allocator. │
/// │ Reclaim all Phase 1 pages (2–12, 14–15) back to the allocator. │
/// └─────────────────────────────────────────────────────────────────────┘
/// ```
///
Expand All@@ -229,22 +229,22 @@ unsafe fn apply_relocations() {
/// means the existing PTE pages can be **reused as-is** for the
/// high-canonical mapping; we only need a new PDPT page and a new PDE page.
///
/// The PDPT and PDE pages are allocated from unused memory after the
/// VTL0-reserved special pages (pages 16–17), preserving all 8 PTE pages
/// for the high-canonical mapping and covering the full 16 MiB.
/// The PDPT and PDE pages are allocated from unused memory after the boot
/// stack page (pages 14–15), preserving all 8 PTE pages for the high-canonical
/// mapping and covering the full 16 MiB.
///
/// ## Page table pages used
///
/// | page | constant | purpose |
/// |------|-----------------------|----------------------------------------|
/// | 16 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 17 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
/// | 14 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 15 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
///
/// ## Algorithm
///
/// 1. Compute PML4/PDPT/PDE indices from `memory_base + KERNEL_OFFSET`.
/// 2. Zero and populate a PDPT page (page 16).
/// 3. Zero and populate a PDE page (page 17) pointing to all 8 VTL0 PTE
/// 2. Zero and populate a PDPT page (page 14).
/// 3. Zero and populate a PDE page (page 15) pointing to all 8 VTL0 PTE
/// pages 5–12 (4KB page mappings, no huge pages).
/// 4. Wire PML4 → PDPT → PDE.
/// 5. Flush TLB and jump to `continue_boot` at the high-canonical address.
Expand DownExpand Up@@ -280,12 +280,12 @@ unsafe fn remap_to_high_canonical() -> ! {
 let pml4_pa = cr3 & CR3_ADDR_MASK;
 let pml4_ptr = pml4_pa as *mut u64;

 // Set up the PDPT page (page 16)
 // Set up the PDPT page.
 let pdpt_page_pa = memory_base + (VTL1_REMAP_PDPT_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pdpt_ptr = pdpt_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pdpt_ptr, 0, ENTRIES_PER_PT_PAGE) };

 // Set up the PDE page (page 17)
 // Set up the PDE page.
 let pde_page_pa = memory_base + (VTL1_REMAP_PDE_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pde_ptr = pde_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pde_ptr, 0, ENTRIES_PER_PT_PAGE) };
Expand Down

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var ref = document.referrer;
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Skip to content
Cherry pick "Update LVBS remap_to_high_canonical layout docs"#996

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 Merged

Sangho Lee (sangho2)
merged 1 commit into

from

Jul 2, 2026
 Merged


Cherry pick "Update LVBS remap_to_high_canonical layout docs"
#996
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8 changes: 4 additions & 4 deletions
litebox_platform_lvbs/src/mshv/vtl1_mem_layout.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,10 +25,10 @@ pub const VTL1_PTE_0_PAGE: usize = 5;
pub const VTL1_KERNEL_STACK_PAGE: usize = VTL1_PTE_0_PAGE + VSM_SK_PTE_PAGES_COUNT;

/// PDPT page for the Phase 1 high-canonical PML4 entry. Placed after the
/// VTL0-reserved special pages (GDT, TSS, PT pages, stack, boot params,
/// cmdline) so that all 8 VTL0 PTE pages remain available for the
/// high-canonical mapping. This page is within the VTL0 identity-mapped
/// 16 MiB region but is otherwise unused memory.
/// VTL0-reserved special pages (GDT, TSS, PT pages, and stack) so that all 8
/// VTL0 PTE pages remain available for the high-canonical mapping. This page
/// is within the VTL0 identity-mapped 16 MiB region but is otherwise unused
/// memory.
pub const VTL1_REMAP_PDPT_PAGE: usize = VTL1_KERNEL_STACK_PAGE + 1;

/// PDE page for the Phase 1 high-canonical mapping. PDE entries point to
Expand Down

28 changes: 14 additions & 14 deletions
litebox_runner_lvbs/src/main.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -176,16 +176,16 @@ unsafe fn apply_relocations() {
/// │ PML4 (page 2, from VTL0) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [0] → VTL0 PDPT (page 3) ← identity │ kept (harmless) │
/// │ │ [256] → new PDPT (page 16) ← high-canon │ Phase 1 adds │
/// │ │ [256] → new PDPT (page 14) ← high-canon │ Phase 1 adds │
/// │ │ ... │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDPT (page 16) │
/// │ New PDPT (page 14) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pdpt_idx] → new PDE (page 17) │ │
/// │ │ [pdpt_idx] → new PDE (page 15) │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDE (page 17) │
/// │ New PDE (page 15) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pde+0] → VTL0 PTE page 5 (2 MiB, 4KB pgs) │ reused as-is │
/// │ │ [pde+1] → VTL0 PTE page 6 │ │
Expand DownExpand Up@@ -213,7 +213,7 @@ unsafe fn apply_relocations() {
/// │ The entire low half [0, 0x7FFF_FFFF_F000) is now available │
/// │ for user-space (TAs / Linux apps). │
/// │ │
/// │ Reclaim all Phase 1 pages (2–12, 16–17) back to the allocator. │
/// │ Reclaim all Phase 1 pages (2–12, 14–15) back to the allocator. │
/// └─────────────────────────────────────────────────────────────────────┘
/// ```
///
Expand All@@ -229,22 +229,22 @@ unsafe fn apply_relocations() {
/// means the existing PTE pages can be **reused as-is** for the
/// high-canonical mapping; we only need a new PDPT page and a new PDE page.
///
/// The PDPT and PDE pages are allocated from unused memory after the
/// VTL0-reserved special pages (pages 16–17), preserving all 8 PTE pages
/// for the high-canonical mapping and covering the full 16 MiB.
/// The PDPT and PDE pages are allocated from unused memory after the boot
/// stack page (pages 14–15), preserving all 8 PTE pages for the high-canonical
/// mapping and covering the full 16 MiB.
///
/// ## Page table pages used
///
/// | page | constant | purpose |
/// |------|-----------------------|----------------------------------------|
/// | 16 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 17 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
/// | 14 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 15 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
///
/// ## Algorithm
///
/// 1. Compute PML4/PDPT/PDE indices from `memory_base + KERNEL_OFFSET`.
/// 2. Zero and populate a PDPT page (page 16).
/// 3. Zero and populate a PDE page (page 17) pointing to all 8 VTL0 PTE
/// 2. Zero and populate a PDPT page (page 14).
/// 3. Zero and populate a PDE page (page 15) pointing to all 8 VTL0 PTE
/// pages 5–12 (4KB page mappings, no huge pages).
/// 4. Wire PML4 → PDPT → PDE.
/// 5. Flush TLB and jump to `continue_boot` at the high-canonical address.
Expand DownExpand Up@@ -280,12 +280,12 @@ unsafe fn remap_to_high_canonical() -> ! {
 let pml4_pa = cr3 & CR3_ADDR_MASK;
 let pml4_ptr = pml4_pa as *mut u64;

 // Set up the PDPT page (page 16)
 // Set up the PDPT page.
 let pdpt_page_pa = memory_base + (VTL1_REMAP_PDPT_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pdpt_ptr = pdpt_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pdpt_ptr, 0, ENTRIES_PER_PT_PAGE) };

 // Set up the PDE page (page 17)
 // Set up the PDE page.
 let pde_page_pa = memory_base + (VTL1_REMAP_PDE_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pde_ptr = pde_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pde_ptr, 0, ENTRIES_PER_PT_PAGE) };
Expand Down

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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Cherry pick "Update LVBS remap_to_high_canonical layout docs"#996

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 Merged

Sangho Lee (sangho2)
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Jul 2, 2026
 Merged


Cherry pick "Update LVBS remap_to_high_canonical layout docs"
#996
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8 changes: 4 additions & 4 deletions
litebox_platform_lvbs/src/mshv/vtl1_mem_layout.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,10 +25,10 @@ pub const VTL1_PTE_0_PAGE: usize = 5;
pub const VTL1_KERNEL_STACK_PAGE: usize = VTL1_PTE_0_PAGE + VSM_SK_PTE_PAGES_COUNT;

/// PDPT page for the Phase 1 high-canonical PML4 entry. Placed after the
/// VTL0-reserved special pages (GDT, TSS, PT pages, stack, boot params,
/// cmdline) so that all 8 VTL0 PTE pages remain available for the
/// high-canonical mapping. This page is within the VTL0 identity-mapped
/// 16 MiB region but is otherwise unused memory.
/// VTL0-reserved special pages (GDT, TSS, PT pages, and stack) so that all 8
/// VTL0 PTE pages remain available for the high-canonical mapping. This page
/// is within the VTL0 identity-mapped 16 MiB region but is otherwise unused
/// memory.
pub const VTL1_REMAP_PDPT_PAGE: usize = VTL1_KERNEL_STACK_PAGE + 1;

/// PDE page for the Phase 1 high-canonical mapping. PDE entries point to
Expand Down

28 changes: 14 additions & 14 deletions
litebox_runner_lvbs/src/main.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -176,16 +176,16 @@ unsafe fn apply_relocations() {
/// │ PML4 (page 2, from VTL0) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [0] → VTL0 PDPT (page 3) ← identity │ kept (harmless) │
/// │ │ [256] → new PDPT (page 16) ← high-canon │ Phase 1 adds │
/// │ │ [256] → new PDPT (page 14) ← high-canon │ Phase 1 adds │
/// │ │ ... │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDPT (page 16) │
/// │ New PDPT (page 14) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pdpt_idx] → new PDE (page 17) │ │
/// │ │ [pdpt_idx] → new PDE (page 15) │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDE (page 17) │
/// │ New PDE (page 15) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pde+0] → VTL0 PTE page 5 (2 MiB, 4KB pgs) │ reused as-is │
/// │ │ [pde+1] → VTL0 PTE page 6 │ │
Expand DownExpand Up@@ -213,7 +213,7 @@ unsafe fn apply_relocations() {
/// │ The entire low half [0, 0x7FFF_FFFF_F000) is now available │
/// │ for user-space (TAs / Linux apps). │
/// │ │
/// │ Reclaim all Phase 1 pages (2–12, 16–17) back to the allocator. │
/// │ Reclaim all Phase 1 pages (2–12, 14–15) back to the allocator. │
/// └─────────────────────────────────────────────────────────────────────┘
/// ```
///
Expand All@@ -229,22 +229,22 @@ unsafe fn apply_relocations() {
/// means the existing PTE pages can be **reused as-is** for the
/// high-canonical mapping; we only need a new PDPT page and a new PDE page.
///
/// The PDPT and PDE pages are allocated from unused memory after the
/// VTL0-reserved special pages (pages 16–17), preserving all 8 PTE pages
/// for the high-canonical mapping and covering the full 16 MiB.
/// The PDPT and PDE pages are allocated from unused memory after the boot
/// stack page (pages 14–15), preserving all 8 PTE pages for the high-canonical
/// mapping and covering the full 16 MiB.
///
/// ## Page table pages used
///
/// | page | constant | purpose |
/// |------|-----------------------|----------------------------------------|
/// | 16 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 17 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
/// | 14 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 15 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
///
/// ## Algorithm
///
/// 1. Compute PML4/PDPT/PDE indices from `memory_base + KERNEL_OFFSET`.
/// 2. Zero and populate a PDPT page (page 16).
/// 3. Zero and populate a PDE page (page 17) pointing to all 8 VTL0 PTE
/// 2. Zero and populate a PDPT page (page 14).
/// 3. Zero and populate a PDE page (page 15) pointing to all 8 VTL0 PTE
/// pages 5–12 (4KB page mappings, no huge pages).
/// 4. Wire PML4 → PDPT → PDE.
/// 5. Flush TLB and jump to `continue_boot` at the high-canonical address.
Expand DownExpand Up@@ -280,12 +280,12 @@ unsafe fn remap_to_high_canonical() -> ! {
 let pml4_pa = cr3 & CR3_ADDR_MASK;
 let pml4_ptr = pml4_pa as *mut u64;

 // Set up the PDPT page (page 16)
 // Set up the PDPT page.
 let pdpt_page_pa = memory_base + (VTL1_REMAP_PDPT_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pdpt_ptr = pdpt_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pdpt_ptr, 0, ENTRIES_PER_PT_PAGE) };

 // Set up the PDE page (page 17)
 // Set up the PDE page.
 let pde_page_pa = memory_base + (VTL1_REMAP_PDE_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pde_ptr = pde_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pde_ptr, 0, ENTRIES_PER_PT_PAGE) };
Expand Down

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Cherry pick "Update LVBS remap_to_high_canonical layout docs"#996

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 Merged

Sangho Lee (sangho2)
merged 1 commit into

from

Jul 2, 2026
 Merged


Cherry pick "Update LVBS remap_to_high_canonical layout docs"
#996
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8 changes: 4 additions & 4 deletions
litebox_platform_lvbs/src/mshv/vtl1_mem_layout.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,10 +25,10 @@ pub const VTL1_PTE_0_PAGE: usize = 5;
pub const VTL1_KERNEL_STACK_PAGE: usize = VTL1_PTE_0_PAGE + VSM_SK_PTE_PAGES_COUNT;

/// PDPT page for the Phase 1 high-canonical PML4 entry. Placed after the
/// VTL0-reserved special pages (GDT, TSS, PT pages, stack, boot params,
/// cmdline) so that all 8 VTL0 PTE pages remain available for the
/// high-canonical mapping. This page is within the VTL0 identity-mapped
/// 16 MiB region but is otherwise unused memory.
/// VTL0-reserved special pages (GDT, TSS, PT pages, and stack) so that all 8
/// VTL0 PTE pages remain available for the high-canonical mapping. This page
/// is within the VTL0 identity-mapped 16 MiB region but is otherwise unused
/// memory.
pub const VTL1_REMAP_PDPT_PAGE: usize = VTL1_KERNEL_STACK_PAGE + 1;

/// PDE page for the Phase 1 high-canonical mapping. PDE entries point to
Expand Down

28 changes: 14 additions & 14 deletions
litebox_runner_lvbs/src/main.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -176,16 +176,16 @@ unsafe fn apply_relocations() {
/// │ PML4 (page 2, from VTL0) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [0] → VTL0 PDPT (page 3) ← identity │ kept (harmless) │
/// │ │ [256] → new PDPT (page 16) ← high-canon │ Phase 1 adds │
/// │ │ [256] → new PDPT (page 14) ← high-canon │ Phase 1 adds │
/// │ │ ... │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDPT (page 16) │
/// │ New PDPT (page 14) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pdpt_idx] → new PDE (page 17) │ │
/// │ │ [pdpt_idx] → new PDE (page 15) │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDE (page 17) │
/// │ New PDE (page 15) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pde+0] → VTL0 PTE page 5 (2 MiB, 4KB pgs) │ reused as-is │
/// │ │ [pde+1] → VTL0 PTE page 6 │ │
Expand DownExpand Up@@ -213,7 +213,7 @@ unsafe fn apply_relocations() {
/// │ The entire low half [0, 0x7FFF_FFFF_F000) is now available │
/// │ for user-space (TAs / Linux apps). │
/// │ │
/// │ Reclaim all Phase 1 pages (2–12, 16–17) back to the allocator. │
/// │ Reclaim all Phase 1 pages (2–12, 14–15) back to the allocator. │
/// └─────────────────────────────────────────────────────────────────────┘
/// ```
///
Expand All@@ -229,22 +229,22 @@ unsafe fn apply_relocations() {
/// means the existing PTE pages can be **reused as-is** for the
/// high-canonical mapping; we only need a new PDPT page and a new PDE page.
///
/// The PDPT and PDE pages are allocated from unused memory after the
/// VTL0-reserved special pages (pages 16–17), preserving all 8 PTE pages
/// for the high-canonical mapping and covering the full 16 MiB.
/// The PDPT and PDE pages are allocated from unused memory after the boot
/// stack page (pages 14–15), preserving all 8 PTE pages for the high-canonical
/// mapping and covering the full 16 MiB.
///
/// ## Page table pages used
///
/// | page | constant | purpose |
/// |------|-----------------------|----------------------------------------|
/// | 16 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 17 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
/// | 14 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 15 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
///
/// ## Algorithm
///
/// 1. Compute PML4/PDPT/PDE indices from `memory_base + KERNEL_OFFSET`.
/// 2. Zero and populate a PDPT page (page 16).
/// 3. Zero and populate a PDE page (page 17) pointing to all 8 VTL0 PTE
/// 2. Zero and populate a PDPT page (page 14).
/// 3. Zero and populate a PDE page (page 15) pointing to all 8 VTL0 PTE
/// pages 5–12 (4KB page mappings, no huge pages).
/// 4. Wire PML4 → PDPT → PDE.
/// 5. Flush TLB and jump to `continue_boot` at the high-canonical address.
Expand DownExpand Up@@ -280,12 +280,12 @@ unsafe fn remap_to_high_canonical() -> ! {
 let pml4_pa = cr3 & CR3_ADDR_MASK;
 let pml4_ptr = pml4_pa as *mut u64;

 // Set up the PDPT page (page 16)
 // Set up the PDPT page.
 let pdpt_page_pa = memory_base + (VTL1_REMAP_PDPT_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pdpt_ptr = pdpt_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pdpt_ptr, 0, ENTRIES_PER_PT_PAGE) };

 // Set up the PDE page (page 17)
 // Set up the PDE page.
 let pde_page_pa = memory_base + (VTL1_REMAP_PDE_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pde_ptr = pde_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pde_ptr, 0, ENTRIES_PER_PT_PAGE) };
Expand Down

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Cherry pick "Update LVBS remap_to_high_canonical layout docs"#996

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 Merged

Sangho Lee (sangho2)
merged 1 commit into

from

Jul 2, 2026
 Merged


Cherry pick "Update LVBS remap_to_high_canonical layout docs"
#996
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8 changes: 4 additions & 4 deletions
litebox_platform_lvbs/src/mshv/vtl1_mem_layout.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,10 +25,10 @@ pub const VTL1_PTE_0_PAGE: usize = 5;
pub const VTL1_KERNEL_STACK_PAGE: usize = VTL1_PTE_0_PAGE + VSM_SK_PTE_PAGES_COUNT;

/// PDPT page for the Phase 1 high-canonical PML4 entry. Placed after the
/// VTL0-reserved special pages (GDT, TSS, PT pages, stack, boot params,
/// cmdline) so that all 8 VTL0 PTE pages remain available for the
/// high-canonical mapping. This page is within the VTL0 identity-mapped
/// 16 MiB region but is otherwise unused memory.
/// VTL0-reserved special pages (GDT, TSS, PT pages, and stack) so that all 8
/// VTL0 PTE pages remain available for the high-canonical mapping. This page
/// is within the VTL0 identity-mapped 16 MiB region but is otherwise unused
/// memory.
pub const VTL1_REMAP_PDPT_PAGE: usize = VTL1_KERNEL_STACK_PAGE + 1;

/// PDE page for the Phase 1 high-canonical mapping. PDE entries point to
Expand Down

28 changes: 14 additions & 14 deletions
litebox_runner_lvbs/src/main.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -176,16 +176,16 @@ unsafe fn apply_relocations() {
/// │ PML4 (page 2, from VTL0) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [0] → VTL0 PDPT (page 3) ← identity │ kept (harmless) │
/// │ │ [256] → new PDPT (page 16) ← high-canon │ Phase 1 adds │
/// │ │ [256] → new PDPT (page 14) ← high-canon │ Phase 1 adds │
/// │ │ ... │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDPT (page 16) │
/// │ New PDPT (page 14) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pdpt_idx] → new PDE (page 17) │ │
/// │ │ [pdpt_idx] → new PDE (page 15) │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDE (page 17) │
/// │ New PDE (page 15) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pde+0] → VTL0 PTE page 5 (2 MiB, 4KB pgs) │ reused as-is │
/// │ │ [pde+1] → VTL0 PTE page 6 │ │
Expand DownExpand Up@@ -213,7 +213,7 @@ unsafe fn apply_relocations() {
/// │ The entire low half [0, 0x7FFF_FFFF_F000) is now available │
/// │ for user-space (TAs / Linux apps). │
/// │ │
/// │ Reclaim all Phase 1 pages (2–12, 16–17) back to the allocator. │
/// │ Reclaim all Phase 1 pages (2–12, 14–15) back to the allocator. │
/// └─────────────────────────────────────────────────────────────────────┘
/// ```
///
Expand All@@ -229,22 +229,22 @@ unsafe fn apply_relocations() {
/// means the existing PTE pages can be **reused as-is** for the
/// high-canonical mapping; we only need a new PDPT page and a new PDE page.
///
/// The PDPT and PDE pages are allocated from unused memory after the
/// VTL0-reserved special pages (pages 16–17), preserving all 8 PTE pages
/// for the high-canonical mapping and covering the full 16 MiB.
/// The PDPT and PDE pages are allocated from unused memory after the boot
/// stack page (pages 14–15), preserving all 8 PTE pages for the high-canonical
/// mapping and covering the full 16 MiB.
///
/// ## Page table pages used
///
/// | page | constant | purpose |
/// |------|-----------------------|----------------------------------------|
/// | 16 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 17 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
/// | 14 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 15 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
///
/// ## Algorithm
///
/// 1. Compute PML4/PDPT/PDE indices from `memory_base + KERNEL_OFFSET`.
/// 2. Zero and populate a PDPT page (page 16).
/// 3. Zero and populate a PDE page (page 17) pointing to all 8 VTL0 PTE
/// 2. Zero and populate a PDPT page (page 14).
/// 3. Zero and populate a PDE page (page 15) pointing to all 8 VTL0 PTE
/// pages 5–12 (4KB page mappings, no huge pages).
/// 4. Wire PML4 → PDPT → PDE.
/// 5. Flush TLB and jump to `continue_boot` at the high-canonical address.
Expand DownExpand Up@@ -280,12 +280,12 @@ unsafe fn remap_to_high_canonical() -> ! {
 let pml4_pa = cr3 & CR3_ADDR_MASK;
 let pml4_ptr = pml4_pa as *mut u64;

 // Set up the PDPT page (page 16)
 // Set up the PDPT page.
 let pdpt_page_pa = memory_base + (VTL1_REMAP_PDPT_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pdpt_ptr = pdpt_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pdpt_ptr, 0, ENTRIES_PER_PT_PAGE) };

 // Set up the PDE page (page 17)
 // Set up the PDE page.
 let pde_page_pa = memory_base + (VTL1_REMAP_PDE_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pde_ptr = pde_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pde_ptr, 0, ENTRIES_PER_PT_PAGE) };
Expand Down

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Cherry pick "Update LVBS remap_to_high_canonical layout docs"#996

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 Merged

Sangho Lee (sangho2)
merged 1 commit into

from

Jul 2, 2026
 Merged


Cherry pick "Update LVBS remap_to_high_canonical layout docs"
#996
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8 changes: 4 additions & 4 deletions
litebox_platform_lvbs/src/mshv/vtl1_mem_layout.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -25,10 +25,10 @@ pub const VTL1_PTE_0_PAGE: usize = 5;
pub const VTL1_KERNEL_STACK_PAGE: usize = VTL1_PTE_0_PAGE + VSM_SK_PTE_PAGES_COUNT;

/// PDPT page for the Phase 1 high-canonical PML4 entry. Placed after the
/// VTL0-reserved special pages (GDT, TSS, PT pages, stack, boot params,
/// cmdline) so that all 8 VTL0 PTE pages remain available for the
/// high-canonical mapping. This page is within the VTL0 identity-mapped
/// 16 MiB region but is otherwise unused memory.
/// VTL0-reserved special pages (GDT, TSS, PT pages, and stack) so that all 8
/// VTL0 PTE pages remain available for the high-canonical mapping. This page
/// is within the VTL0 identity-mapped 16 MiB region but is otherwise unused
/// memory.
pub const VTL1_REMAP_PDPT_PAGE: usize = VTL1_KERNEL_STACK_PAGE + 1;

/// PDE page for the Phase 1 high-canonical mapping. PDE entries point to
Expand Down

28 changes: 14 additions & 14 deletions
litebox_runner_lvbs/src/main.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -176,16 +176,16 @@ unsafe fn apply_relocations() {
/// │ PML4 (page 2, from VTL0) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [0] → VTL0 PDPT (page 3) ← identity │ kept (harmless) │
/// │ │ [256] → new PDPT (page 16) ← high-canon │ Phase 1 adds │
/// │ │ [256] → new PDPT (page 14) ← high-canon │ Phase 1 adds │
/// │ │ ... │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDPT (page 16) │
/// │ New PDPT (page 14) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pdpt_idx] → new PDE (page 17) │ │
/// │ │ [pdpt_idx] → new PDE (page 15) │ │
/// │ └──────────────────────────────────────────────┘ │
/// │ │
/// │ New PDE (page 17) │
/// │ New PDE (page 15) │
/// │ ┌──────────────────────────────────────────────┐ │
/// │ │ [pde+0] → VTL0 PTE page 5 (2 MiB, 4KB pgs) │ reused as-is │
/// │ │ [pde+1] → VTL0 PTE page 6 │ │
Expand DownExpand Up@@ -213,7 +213,7 @@ unsafe fn apply_relocations() {
/// │ The entire low half [0, 0x7FFF_FFFF_F000) is now available │
/// │ for user-space (TAs / Linux apps). │
/// │ │
/// │ Reclaim all Phase 1 pages (2–12, 16–17) back to the allocator. │
/// │ Reclaim all Phase 1 pages (2–12, 14–15) back to the allocator. │
/// └─────────────────────────────────────────────────────────────────────┘
/// ```
///
Expand All@@ -229,22 +229,22 @@ unsafe fn apply_relocations() {
/// means the existing PTE pages can be **reused as-is** for the
/// high-canonical mapping; we only need a new PDPT page and a new PDE page.
///
/// The PDPT and PDE pages are allocated from unused memory after the
/// VTL0-reserved special pages (pages 16–17), preserving all 8 PTE pages
/// for the high-canonical mapping and covering the full 16 MiB.
/// The PDPT and PDE pages are allocated from unused memory after the boot
/// stack page (pages 14–15), preserving all 8 PTE pages for the high-canonical
/// mapping and covering the full 16 MiB.
///
/// ## Page table pages used
///
/// | page | constant | purpose |
/// |------|-----------------------|----------------------------------------|
/// | 16 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 17 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
/// | 14 | `VTL1_REMAP_PDPT_PAGE`| PDPT for the high-canonical PML4 entry |
/// | 15 | `VTL1_REMAP_PDE_PAGE` | PDE pointing to PTE pages 5–12 |
///
/// ## Algorithm
///
/// 1. Compute PML4/PDPT/PDE indices from `memory_base + KERNEL_OFFSET`.
/// 2. Zero and populate a PDPT page (page 16).
/// 3. Zero and populate a PDE page (page 17) pointing to all 8 VTL0 PTE
/// 2. Zero and populate a PDPT page (page 14).
/// 3. Zero and populate a PDE page (page 15) pointing to all 8 VTL0 PTE
/// pages 5–12 (4KB page mappings, no huge pages).
/// 4. Wire PML4 → PDPT → PDE.
/// 5. Flush TLB and jump to `continue_boot` at the high-canonical address.
Expand DownExpand Up@@ -280,12 +280,12 @@ unsafe fn remap_to_high_canonical() -> ! {
 let pml4_pa = cr3 & CR3_ADDR_MASK;
 let pml4_ptr = pml4_pa as *mut u64;

 // Set up the PDPT page (page 16)
 // Set up the PDPT page.
 let pdpt_page_pa = memory_base + (VTL1_REMAP_PDPT_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pdpt_ptr = pdpt_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pdpt_ptr, 0, ENTRIES_PER_PT_PAGE) };

 // Set up the PDE page (page 17)
 // Set up the PDE page.
 let pde_page_pa = memory_base + (VTL1_REMAP_PDE_PAGE * vtl1_mem_layout::PAGE_SIZE) as u64;
 let pde_ptr = pde_page_pa as *mut u64;
 unsafe { core::ptr::write_bytes(pde_ptr, 0, ENTRIES_PER_PT_PAGE) };
Expand Down