Deaicup/Deshab-OS
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This commit is contained in:
Linehu
2026-08-09 22:20:01 +08:00
parent 8717ea8f20
commit 2a50fa58c7
185 changed files with 19890 additions and 710 deletions
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CODE/UTSM/vmm/linux_loader.c
+171 -13
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@@ -49,6 +49,11 @@ static u64 str_len(const char *s) {
static struct linux_guest_info g_guest;
static const char *g_default_cmdline = LINUX_DEFAULT_CMDLINE;
/* VSCode Phase 3: host virtual address of the graphics surface pool.
* The virtio-gpu 2D backend composites the scanout into this buffer; the
* desktop reads it to blit guest graphics onto the IDE host area. 0 = unused. */
static void *g_surface_vaddr = 0;
/* ===== Guest page table helpers =====
*
* Build identity-mapped 4-level page tables for the guest.
@@ -220,9 +225,19 @@ static int setup_e820(void *bootparams_virt) {
table[n].type = E820_TYPE_RESERVED;
n++;
/* Entry 5: 0x04100000-0x0FFFFFFF: usable RAM (general RAM, ~188MB) */
table[n].addr = 0x04100000;
table[n].size = 0x0BF00000; /* 191MB */
/* Entry 5: 0x04100000-0x04FFFFFF: reserved (Graphics surface pool, 16MB)
* VSCode integration Phase 1: separate DMA region EPT-mapped into the
* guest; Linux user-space mmaps it via /dev/utsm as the scanout buffer. */
table[n].addr = LINUX_GUEST_SURFACE_GPA;
table[n].size = LINUX_GUEST_SURFACE_SIZE; /* 16MB */
table[n].type = E820_TYPE_RESERVED;
n++;
/* Entry 6: 0x05000000-0x5FFFFFFF: usable RAM (general RAM, ~1.4GB)
* VSCode integration Phase 1: expanded from 191MB to 1.4GB to fit
* VSCode + Electron + GUI stack (Xorg/modesetting + GTK + mesa). */
table[n].addr = LINUX_GUEST_RAM_GPA;
table[n].size = LINUX_GUEST_RAM_SIZE; /* 1.4GB */
table[n].type = E820_TYPE_RAM;
n++;
@@ -349,6 +364,86 @@ void *linux_find_rootfs_module(u64 *size_out) {
return (void *)0;
}
/* ===== extra rootfs module finder =====
*
* VSCode Phase 4：在 Limine boot module 中查找持久 rw 卷镜像
* （路径含 "extra"，如 linux-extra-rootfs.img）。
* 通过 virtio-blk slot6（可写）暴露给 Linux guest 作为 /dev/vdc。 */
void *linux_find_extra_rootfs_module(u64 *size_out) {
if (!g_module_request.response) return (void *)0;
struct limine_module_response *resp = g_module_request.response;
for (u64 i = 0; i < resp->module_count; i++) {
struct limine_file *file = resp->modules[i];
if (!file || !file->path) continue;
const char *p = file->path;
int match = 0;
for (const char *s = p; *s; s++) {
/* 匹配 "extra"（如 linux-extra-rootfs.img） */
if ((s[0] == 'e' || s[0] == 'E') &&
(s[1] == 'x' || s[1] == 'X') &&
(s[2] == 't' || s[2] == 'T') &&
(s[3] == 'r' || s[3] == 'R') &&
(s[4] == 'a' || s[4] == 'A')) {
match = 1;
break;
}
}
if (!match) continue;
if (size_out) *size_out = file->size;
log_info("[LINUX] found extra-rootfs module:");
log_info(file->path);
log_hex64("[LINUX] extra-rootfs size=", file->size);
return file->address;
}
log_warn("[LINUX] no extra-rootfs module found");
return (void *)0;
}
/* ===== VSCode tarball module finder =====
*
* VSCode Phase 5：在 Limine boot module 中查找 VSCode tarball
* （路径含 "vscode"，如 linux-vscode.tar.gz）。
* 由 lxc_vscode_install() 流式推入 guest 并解压到 /opt/vscode。
* 模块缺失属正常情况（未投放 tarball），返回 NULL 由调用方跳过。 */
void *linux_find_vscode_module(u64 *size_out) {
if (!g_module_request.response) return (void *)0;
struct limine_module_response *resp = g_module_request.response;
for (u64 i = 0; i < resp->module_count; i++) {
struct limine_file *file = resp->modules[i];
if (!file || !file->path) continue;
const char *p = file->path;
int match = 0;
for (const char *s = p; *s; s++) {
/* 匹配 "vscode"（如 linux-vscode.tar.gz） */
if ((s[0] == 'v' || s[0] == 'V') &&
(s[1] == 's' || s[1] == 'S') &&
(s[2] == 'c' || s[2] == 'C') &&
(s[3] == 'o' || s[3] == 'O') &&
(s[4] == 'd' || s[4] == 'D') &&
(s[5] == 'e' || s[5] == 'E')) {
match = 1;
break;
}
}
if (!match) continue;
if (size_out) *size_out = file->size;
log_info("[LINUX] found vscode tarball module:");
log_info(file->path);
log_hex64("[LINUX] vscode tarball size=", file->size);
return file->address;
}
log_info("[LINUX] no vscode tarball module (install skipped)");
return (void *)0;
}
/* ===== bzImage parser ===== */
int linux_parse_bzimage(const void *bzimage, u64 size,
@@ -552,16 +647,23 @@ int linux_loader_init(void) {
return -8;
}
/* General RAM: 64MB for Linux, mapped at GPA 0x05000000 (after IPC region) */
u64 ram_size = 64 * 1024 * 1024;
/* General RAM: VSCode integration Phase 1 expansion.
* 1.4GB (LINUX_GUEST_RAM_SIZE) accommodates VSCode + Electron + GUI stack
* (Xorg/modesetting + GTK + mesa softpipe). Falls back to 1GB / 512MB if
* the host cannot allocate the full amount; 512MB is the floor for the
* Xfbdev + xterm MVP (Phase 3). Original allocation was 64MB. */
u64 ram_size = LINUX_GUEST_RAM_SIZE; /* 1.4GB */
dkm_dma_buffer ram_buf;
if (dma_alloc_pages(ram_size / 4096, 2 * 1024 * 1024, 0, &ram_buf) != 0) {
log_error("[LINUX] failed to alloc guest RAM (64MB)");
/* Try smaller: 32MB */
ram_size = 32 * 1024 * 1024;
log_warn("[LINUX] failed to alloc guest RAM (1.4GB), trying 1GB");
ram_size = 1ULL * 1024 * 1024 * 1024; /* 1GB */
if (dma_alloc_pages(ram_size / 4096, 2 * 1024 * 1024, 0, &ram_buf) != 0) {
log_error("[LINUX] failed to alloc guest RAM (32MB)");
return -9;
log_warn("[LINUX] failed to alloc guest RAM (1GB), trying 512MB");
ram_size = 512 * 1024 * 1024; /* 512MB floor for Phase 3 MVP */
if (dma_alloc_pages(ram_size / 4096, 2 * 1024 * 1024, 0, &ram_buf) != 0) {
log_error("[LINUX] failed to alloc guest RAM (512MB minimum)");
return -9;
}
}
}
log_hex64("[LINUX] guest RAM HPA=", ram_buf.phys);
@@ -680,13 +782,14 @@ int linux_loader_init(void) {
return -15;
}
/* General RAM: map the allocated RAM at GPA 0x05000000 (after IPC region).
* GPA layout (matches e820):
/* General RAM: map the allocated RAM at GPA 0x05000000 (after surface pool).
* GPA layout (matches e820, VSCode integration Phase 1):
* 0x00400000-0x009FFFFF: fixed regions (boot_params, GDT, pgt, stack, cmdline)
* 0x01000000-0x02FFFFFF: kernel
* 0x03000000-0x03FFFFFF: initrd (if any)
* 0x04000000-0x040FFFFF: IPC shared memory (mapped by ipc_shm_init)
* 0x05000000-0x08FFFFFF: general RAM (64MB)
* 0x04100000-0x04FFFFFF: Graphics surface pool (mapped below)
* 0x05000000-0x5FFFFFFF: general RAM (~1.4GB, expanded Phase 1)
* Linux sees this as usable RAM in e820. */
u64 ram_gpa = LINUX_GUEST_RAM_GPA;
if (ept_map_range(ram_gpa, ram_buf.phys, ram_size, EPT_RWX) != 0) {
@@ -695,6 +798,41 @@ int linux_loader_init(void) {
}
log_hex64("[LINUX] guest RAM mapped GPA=", ram_gpa);
/* VSCode integration Phase 1: allocate graphics surface pool and EPT-map
* it into the Linux guest at LINUX_GUEST_SURFACE_GPA. Linux user-space
* obtains a writable pointer to this region via UTSM_HCALL_SURFACE_INFO +
* /dev/utsm mmap; UTSM reads it to blit guest graphics to the Deshab
* framebuffer (Phase 3 virtio-gpu shadow scanout). Non-fatal on failure:
* Linux guest still runs, VSCode integration phases 2+ will degrade. */
{
dkm_dma_buffer surface_buf;
u64 surface_size = LINUX_GUEST_SURFACE_SIZE; /* 16MB */
if (dma_alloc_pages(surface_size / 4096, 2 * 1024 * 1024, 0, &surface_buf) != 0) {
log_warn("[LINUX] failed to alloc surface pool (16MB) — VSCode integration degraded");
g_guest.surface_hpa = 0;
g_guest.surface_gpa = 0;
g_guest.surface_size = 0;
} else if (ept_map_range(LINUX_GUEST_SURFACE_GPA, surface_buf.phys,
surface_size, EPT_READ | EPT_WRITE) != 0) {
log_warn("[LINUX] EPT map surface pool failed — VSCode integration degraded");
g_guest.surface_hpa = 0;
g_guest.surface_gpa = 0;
g_guest.surface_size = 0;
} else {
/* Zero the surface pool so guest reads deterministic data before
* the X server writes a real scanout. */
u8 *surface_virt = (u8 *)surface_buf.virt;
for (u64 i = 0; i < surface_size; i++) surface_virt[i] = 0;
g_guest.surface_hpa = surface_buf.phys;
g_guest.surface_gpa = LINUX_GUEST_SURFACE_GPA;
g_guest.surface_size = surface_size;
g_surface_vaddr = surface_buf.virt; /* VSCode Phase 3: for virtio-gpu + desktop blit */
log_hex64("[LINUX] surface pool HPA=", surface_buf.phys);
log_hex64("[LINUX] surface pool GPA=", g_guest.surface_gpa);
log_hex64("[LINUX] surface pool size=", surface_size);
}
}
/* Identity-map the first 1MB (BIOS area, needed by some Linux code paths) */
if (ept_identity_map(0, 0x100000, EPT_RWX) != 0) {
log_warn("[LINUX] EPT identity map first 1MB failed (non-critical)");
@@ -715,3 +853,23 @@ int linux_loader_init(void) {
const struct linux_guest_info *linux_get_guest_info(void) {
return g_guest.loaded ? &g_guest : (struct linux_guest_info *)0;
}
/* VSCode integration Phase 1: query graphics surface pool.
* Returns 0 on success (surface pool allocated and mapped), -1 if not
* initialized. Caller may pass NULL for any output it doesn't need. */
int linux_get_surface_info(u64 *hpa_out, u64 *gpa_out, u64 *size_out) {
if (!g_guest.loaded || g_guest.surface_hpa == 0) {
return -1;
}
if (hpa_out) *hpa_out = g_guest.surface_hpa;
if (gpa_out) *gpa_out = g_guest.surface_gpa;
if (size_out) *size_out = g_guest.surface_size;
return 0;
}
/* VSCode Phase 3: return host virtual address of the surface pool.
* The virtio-gpu 2D backend composites the scanout here; the desktop reads it
* for blitting to the framebuffer. Returns NULL if the pool is not allocated. */
void *linux_get_surface_vaddr(void) {
return g_surface_vaddr;
}