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feat: exhaustive STUB instrumentation - 241 panic sites across VMM/kernel + whitelist alignment

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- VMM cluster: XJ3-E/LIN-E/VMM-E/VMX-E/EPT-E/IPC-E/VVB-E (124 sites)

- kernel cluster: TST-E/MM-E/UTRW-E/LAPIC-E/IDT-E/SAS-E/PRB-E/NETST-E/DKM-E (117 sites)

- whitelist fixes: vmm_init env probes E10-E14 fallback, disk_log read-only block path, DSL-E05 non-FAT32 device 0 probe

- QEMU smoke: wizard -> USER.CONF -> login -> desktop ready, zero spurious panic
This commit is contained in:
Linehu
2026-10-03 21:26:04 +08:00
parent 506d1b18c6
commit 174af71b39
62 changed files with 667 additions and 36 deletions
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CODE/UTSM/vmm/vmexit.c
+9
View File
@@ -1,4 +1,5 @@
#include <utsm/vmx.h>
#include <utsm/panic.h>
#include <utsm/ept.h>
#include <utsm/vmm.h>
#include <utsm/hypercall.h>
@@ -98,10 +99,12 @@ static int ept_map_guest_ram_page(u64 gpa_page) {
dkm_dma_buffer buf;
if (dma_alloc_pages(1, EPT_PAGE_SIZE, 0, &buf) != 0) {
log_error("[VMEXIT] OOM for guest RAM page");
panic_full("VMX-E10 OOM FOR GUEST RAM PAGE", "dma_alloc_pages failed for a demand mapped guest ram page", 0);
return -1;
}
if (ept_map_range(gpa_page, buf.phys, EPT_PAGE_SIZE, EPT_RWX) != 0) {
log_error("[VMEXIT] EPT map guest RAM page failed");
panic_full("VMX-E11 EPT MAP GUEST RAM PAGE FAILED", "ept_map_range failed for a demand mapped guest ram page", 0);
return -1;
}
return 0;
@@ -1091,6 +1094,7 @@ static int handle_virtio_mmio_access(u64 gpa, u64 rip, int *out_resume) {
log_error("[VMEXIT] virtio-mmio: cannot decode access insn");
log_hex64("[VMEXIT] rip=", rip);
*out_resume = 0;
panic_full("VMX-E12 CANNOT DECODE VIRTIO MMIO INSN", "instruction fetch or decode failed for a virtio mmio access", 0);
return -1;
}
@@ -1146,6 +1150,7 @@ static int handle_ept_violation(u64 qualification, u64 rip, int *out_resume) {
log_error("[VMEXIT] EPT upgrade existing page failed");
log_hex64("[VMEXIT] gpa=", gpa);
*out_resume = 0;
panic_full("VMX-E13 EPT UPGRADE EXISTING PAGE FAILED", "ept_map_range failed while upgrading an existing ept leaf", 0);
return -1;
}
ept_flush_ept();
@@ -1161,6 +1166,7 @@ static int handle_ept_violation(u64 qualification, u64 rip, int *out_resume) {
log_error("[VMEXIT] EPT violation: guest RAM map failed");
log_hex64("[VMEXIT] gpa=", gpa);
*out_resume = 0;
panic_full("VMX-E14 EPT VIOLATION GUEST RAM MAP FAILED", "demand mapping a guest ram page on ept violation failed", 0);
return -1;
}
*out_resume = 1;
@@ -1322,6 +1328,7 @@ static int handle_exception(u64 qualification, u64 rip, int *out_resume) {
log_hex64("[VMEXIT] df idtr=", vmx_vmcs_read(VMCS_GUEST_IDTR_BASE));
log_hex64("[VMEXIT] df idtl=", vmx_vmcs_read(VMCS_GUEST_IDTR_LIMIT));
*out_resume = 0;
panic_full("VMX-E15 GUEST DOUBLE FAULT", "guest took a double fault which will not be reinjected", 0);
return 0;
}
if (g_linux_guest_active) {
@@ -1461,6 +1468,7 @@ int vmexit_dispatch(void) {
if (ept_map_guest_ram_page(page) != 0) {
log_error("[VMEXIT] EPT misconfig repair failed");
resume = 0;
panic_full("VMX-E16 EPT MISCONFIG REPAIR FAILED", "both ept_repair_leaf and a fresh page alloc failed on ept misconfig", 0);
break;
}
if (misconfig_logs <= 16)
@@ -1484,6 +1492,7 @@ int vmexit_dispatch(void) {
log_hex64("[VMEXIT] triple idtr=", vmx_vmcs_read(VMCS_GUEST_IDTR_BASE));
log_hex64("[VMEXIT] triple idtl=", vmx_vmcs_read(VMCS_GUEST_IDTR_LIMIT));
resume = 0;
panic_full("VMX-E17 GUEST TRIPLE FAULT", "guest cpu entered a triple fault", 0);
break;
case EXIT_EXTERNAL_INTERRUPT:
INSTR_STAT_INC(ext_irq);