If the the guest is using nested page tables, change the output format
slightly, to first show guest virtual to guest physical, then guest
physical to host physical, as below:
(qemu) info tlb
Info guest TLB (guest virtual to guest physical):
0000008000800000: 000000000076a000 -------U-P
0000008000801000: 000000000076b000 -------U-P
0000008000802000: 000000000076c000 -------U-P
0000008000803000: 000000000076d000 -------U-P
[...]
0000008004ffd000: 0000000000ffd000 --------WP
0000008004ffe000: 0000000000ffe000 --------WP
0000008004fff000: 0000000000fff000 --------WP
Info host TLB, (guest physical to host physical):
0000000000001000: 0000000001b20000 ----XWR
0000000000002000: 0000000001b21000 ----XWR
0000000000003000: 0000000001b22000 ----XWR
0000000000004000: 0000000001b23000 ----XWR
0000000000005000: 0000000001b24000 ----XWR
[...]
Signed-off-by: Don Porter <por...@cs.unc.edu>
---
include/hw/core/sysemu-cpu-ops.h | 7 +
target/i386/cpu.c | 1 +
target/i386/cpu.h | 2 +
target/i386/monitor.c | 233 +++++++++----------------------
4 files changed, 75 insertions(+), 168 deletions(-)
diff --git a/include/hw/core/sysemu-cpu-ops.h b/include/hw/core/sysemu-cpu-ops.h
index d0e939def8..083df4717c 100644
--- a/include/hw/core/sysemu-cpu-ops.h
+++ b/include/hw/core/sysemu-cpu-ops.h
@@ -225,6 +225,13 @@ typedef struct SysemuCPUOps {
bool (*mon_flush_page_print_state)(CPUState *cs,
struct mem_print_state *state);
+ /**
+ * @mon_print_pte: Hook called by the monitor to print a page
+ * table entry at address addr, with contents pte.
+ */
+ void (*mon_print_pte) (CPUState *cs, GString *buf, hwaddr addr,
+ hwaddr pte, uint64_t prot, int mmu_idx);
+
} SysemuCPUOps;
int compressing_iterator(CPUState *cs, void *data, DecodedPTE *pte,
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index ec419e0ef0..030198497a 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -8388,6 +8388,7 @@ static const struct SysemuCPUOps i386_sysemu_ops = {
.mon_init_page_table_iterator = &x86_mon_init_page_table_iterator,
.mon_info_pg_print_header = &x86_mon_info_pg_print_header,
.mon_flush_page_print_state = &x86_mon_flush_print_pg_state,
+ .mon_print_pte = &x86_mon_print_pte,
};
#endif
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 4e5877f41d..413c743c1a 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -2264,6 +2264,8 @@ bool x86_mon_init_page_table_iterator(CPUState *cpu,
GString *buf, int mmu_idx,
struct mem_print_state *state);
void x86_mon_info_pg_print_header(struct mem_print_state *state);
bool x86_mon_flush_print_pg_state(CPUState *cs, struct mem_print_state *state);
+void x86_mon_print_pte(CPUState *cs, GString *out_buf, hwaddr addr,
+ hwaddr child, uint64_t prot, int mmu_idx);
bool x86_ptw_translate(CPUState *cs, vaddr vaddress, hwaddr *hpa,
bool debug, int mmu_idx, bool user_access,
const MMUAccessType access_type, uint64_t *page_size,
diff --git a/target/i386/monitor.c b/target/i386/monitor.c
index 8ef92e7c42..d88347684b 100644
--- a/target/i386/monitor.c
+++ b/target/i386/monitor.c
@@ -224,201 +224,98 @@ static hwaddr addr_canonical(CPUArchState *env, hwaddr
addr)
return addr;
}
-static void print_pte(Monitor *mon, CPUArchState *env, hwaddr addr,
- hwaddr pte, hwaddr mask)
+void x86_mon_print_pte(CPUState *cs, GString *out_buf, hwaddr addr,
+ hwaddr child, uint64_t prot, int mmu_idx)
{
+ CPUX86State *env = cpu_env(cs);
+ g_autoptr(GString) buf = g_string_new("");
+
addr = addr_canonical(env, addr);
- monitor_printf(mon, HWADDR_FMT_plx ": " HWADDR_FMT_plx
- " %c%c%c%c%c%c%c%c%c\n",
- addr,
- pte & mask,
- pte & PG_NX_MASK ? 'X' : '-',
- pte & PG_GLOBAL_MASK ? 'G' : '-',
- pte & PG_PSE_MASK ? 'P' : '-',
- pte & PG_DIRTY_MASK ? 'D' : '-',
- pte & PG_ACCESSED_MASK ? 'A' : '-',
- pte & PG_PCD_MASK ? 'C' : '-',
- pte & PG_PWT_MASK ? 'T' : '-',
- pte & PG_USER_MASK ? 'U' : '-',
- pte & PG_RW_MASK ? 'W' : '-');
-}
+ g_string_append_printf(buf, HWADDR_FMT_plx ": " HWADDR_FMT_plx " ",
+ addr, child);
-static void tlb_info_32(Monitor *mon, CPUArchState *env)
-{
- unsigned int l1, l2;
- uint32_t pgd, pde, pte;
+ g_string_append_printf(buf, " %s", pg_bits(cs, prot, mmu_idx));
- pgd = env->cr[3] & ~0xfff;
- for(l1 = 0; l1 < 1024; l1++) {
- cpu_physical_memory_read(pgd + l1 * 4, &pde, 4);
- pde = le32_to_cpu(pde);
- if (pde & PG_PRESENT_MASK) {
- if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
- /* 4M pages */
- print_pte(mon, env, (l1 << 22), pde, ~((1 << 21) - 1));
- } else {
- for(l2 = 0; l2 < 1024; l2++) {
- cpu_physical_memory_read((pde & ~0xfff) + l2 * 4, &pte, 4);
- pte = le32_to_cpu(pte);
- if (pte & PG_PRESENT_MASK) {
- print_pte(mon, env, (l1 << 22) + (l2 << 12),
- pte & ~PG_PSE_MASK,
- ~0xfff);
- }
- }
- }
- }
- }
-}
-
-static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
-{
- unsigned int l1, l2, l3;
- uint64_t pdpe, pde, pte;
- uint64_t pdp_addr, pd_addr, pt_addr;
+ /* Trim line to fit screen */
+ g_string_truncate(buf, 79);
- pdp_addr = env->cr[3] & ~0x1f;
- for (l1 = 0; l1 < 4; l1++) {
- cpu_physical_memory_read(pdp_addr + l1 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
- if (pdpe & PG_PRESENT_MASK) {
- pd_addr = pdpe & 0x3fffffffff000ULL;
- for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pd_addr + l2 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
- if (pde & PG_PRESENT_MASK) {
- if (pde & PG_PSE_MASK) {
- /* 2M pages with PAE, CR4.PSE is ignored */
- print_pte(mon, env, (l1 << 30) + (l2 << 21), pde,
- ~((hwaddr)(1 << 20) - 1));
- } else {
- pt_addr = pde & 0x3fffffffff000ULL;
- for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pt_addr + l3 * 8, &pte,
8);
- pte = le64_to_cpu(pte);
- if (pte & PG_PRESENT_MASK) {
- print_pte(mon, env, (l1 << 30) + (l2 << 21)
- + (l3 << 12),
- pte & ~PG_PSE_MASK,
- ~(hwaddr)0xfff);
- }
- }
- }
- }
- }
- }
- }
+ g_string_append_printf(out_buf, "%s\n", buf->str);
}
-#ifdef TARGET_X86_64
-static void tlb_info_la48(Monitor *mon, CPUArchState *env,
- uint64_t l0, uint64_t pml4_addr)
+static
+int mem_print_tlb(CPUState *cs, void *data, DecodedPTE *pte, int height,
+ int offset, int mmu_idx, const PageTableLayout *layout)
{
- uint64_t l1, l2, l3, l4;
- uint64_t pml4e, pdpe, pde, pte;
- uint64_t pdp_addr, pd_addr, pt_addr;
-
- for (l1 = 0; l1 < 512; l1++) {
- cpu_physical_memory_read(pml4_addr + l1 * 8, &pml4e, 8);
- pml4e = le64_to_cpu(pml4e);
- if (!(pml4e & PG_PRESENT_MASK)) {
- continue;
- }
-
- pdp_addr = pml4e & 0x3fffffffff000ULL;
- for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pdp_addr + l2 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
- if (!(pdpe & PG_PRESENT_MASK)) {
- continue;
- }
+ struct mem_print_state *state = (struct mem_print_state *) data;
+ CPUClass *cc = CPU_GET_CLASS(cs);
- if (pdpe & PG_PSE_MASK) {
- /* 1G pages, CR4.PSE is ignored */
- print_pte(mon, env, (l0 << 48) + (l1 << 39) + (l2 << 30),
- pdpe, 0x3ffffc0000000ULL);
- continue;
- }
-
- pd_addr = pdpe & 0x3fffffffff000ULL;
- for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pd_addr + l3 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
- if (!(pde & PG_PRESENT_MASK)) {
- continue;
- }
+ cc->sysemu_ops->mon_print_pte(cs, state->buf, pte->bits_translated,
+ pte->child, pte->prot, mmu_idx);
- if (pde & PG_PSE_MASK) {
- /* 2M pages, CR4.PSE is ignored */
- print_pte(mon, env, (l0 << 48) + (l1 << 39) + (l2 << 30) +
- (l3 << 21), pde, 0x3ffffffe00000ULL);
- continue;
- }
-
- pt_addr = pde & 0x3fffffffff000ULL;
- for (l4 = 0; l4 < 512; l4++) {
- cpu_physical_memory_read(pt_addr
- + l4 * 8,
- &pte, 8);
- pte = le64_to_cpu(pte);
- if (pte & PG_PRESENT_MASK) {
- print_pte(mon, env, (l0 << 48) + (l1 << 39) +
- (l2 << 30) + (l3 << 21) + (l4 << 12),
- pte & ~PG_PSE_MASK, 0x3fffffffff000ULL);
- }
- }
- }
- }
- }
+ return 0;
}
-static void tlb_info_la57(Monitor *mon, CPUArchState *env)
+static
+void helper_hmp_info_tlb(CPUState *cs, Monitor *mon, int mmu_idx)
{
- uint64_t l0;
- uint64_t pml5e;
- uint64_t pml5_addr;
+ struct mem_print_state state;
+ g_autoptr(GString) buf = g_string_new("");
+ CPUClass *cc = CPU_GET_CLASS(cs);
- pml5_addr = env->cr[3] & 0x3fffffffff000ULL;
- for (l0 = 0; l0 < 512; l0++) {
- cpu_physical_memory_read(pml5_addr + l0 * 8, &pml5e, 8);
- pml5e = le64_to_cpu(pml5e);
- if (pml5e & PG_PRESENT_MASK) {
- tlb_info_la48(mon, env, l0, pml5e & 0x3fffffffff000ULL);
- }
+ if (!cc->sysemu_ops->mon_init_page_table_iterator(cs, buf, mmu_idx,
+ &state)) {
+ monitor_printf(mon, "Unable to initialize page table iterator\n");
+ return;
}
+
+ /**
+ * 'info tlb' visits only leaf PTEs marked present.
+ * It does not check other protection bits.
+ */
+ for_each_pte(cs, &mem_print_tlb, &state, false, false, false, mmu_idx);
+
+ monitor_printf(mon, "%s", buf->str);
}
-#endif /* TARGET_X86_64 */
void hmp_info_tlb(Monitor *mon, const QDict *qdict)
{
- CPUArchState *env;
+ CPUState *cs = mon_get_cpu(mon);
+ bool nested;
- env = mon_get_cpu_env(mon);
- if (!env) {
- monitor_printf(mon, "No CPU available\n");
+ if (!cs) {
+ monitor_printf(mon, "Unable to get CPUState. Internal error\n");
return;
}
- if (!(env->cr[0] & CR0_PG_MASK)) {
+ if (!cpu_paging_enabled(cs, 0)) {
monitor_printf(mon, "PG disabled\n");
return;
}
- if (env->cr[4] & CR4_PAE_MASK) {
-#ifdef TARGET_X86_64
- if (env->hflags & HF_LMA_MASK) {
- if (env->cr[4] & CR4_LA57_MASK) {
- tlb_info_la57(mon, env);
- } else {
- tlb_info_la48(mon, env, 0, env->cr[3] & 0x3fffffffff000ULL);
- }
- } else
-#endif
- {
- tlb_info_pae32(mon, env);
- }
- } else {
- tlb_info_32(mon, env);
+
+ CPUClass *cc = CPU_GET_CLASS(cs);
+
+ if (!cc->sysemu_ops->mon_print_pte
+ || !cc->sysemu_ops->mon_init_page_table_iterator) {
+ monitor_printf(mon, "Info tlb unsupported on this ISA\n");
+ return;
+ }
+
+ nested = cpu_paging_enabled(cs, 1);
+
+ if (nested) {
+ monitor_printf(mon,
+ "Info guest TLB (guest virtual to guest physical):\n");
+ }
+
+ helper_hmp_info_tlb(cs, mon, 0);
+
+ if (nested) {
+ monitor_printf(mon,
+ "Info host TLB, (guest physical to host physical):\n");
+
+ helper_hmp_info_tlb(cs, mon, 1);
+
}
}
--
2.34.1
