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[152.2.133.133]) by smtp.gmail.com with ESMTPSA id af79cd13be357-795330b2305sm62935685a.88.2024.06.06.07.03.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Jun 2024 07:03:17 -0700 (PDT) From: Don Porter To: qemu-devel@nongnu.org Cc: dave@treblig.org, peter.maydell@linaro.org, nadav.amit@gmail.com, richard.henderson@linaro.org, philmd@linaro.org, Don Porter Subject: [PATCH v3 2/6] Convert 'info tlb' to use generic iterator Date: Thu, 6 Jun 2024 10:02:49 -0400 Message-Id: <20240606140253.2277760-3-porter@cs.unc.edu> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240606140253.2277760-1-porter@cs.unc.edu> References: <20240606140253.2277760-1-porter@cs.unc.edu> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::72d; envelope-from=porter@cs.unc.edu; helo=mail-qk1-x72d.google.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Signed-off-by: Don Porter --- include/hw/core/sysemu-cpu-ops.h | 7 + monitor/hmp-cmds-target.c | 1 + target/i386/cpu.h | 2 + target/i386/monitor.c | 217 ++++++------------------------- 4 files changed, 53 insertions(+), 174 deletions(-) diff --git a/include/hw/core/sysemu-cpu-ops.h b/include/hw/core/sysemu-cpu-ops.h index eb16a1c3e2..bf3de3e004 100644 --- a/include/hw/core/sysemu-cpu-ops.h +++ b/include/hw/core/sysemu-cpu-ops.h @@ -243,6 +243,13 @@ 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) (Monitor *mon, CPUArchState *env, hwaddr addr, + hwaddr pte); + } SysemuCPUOps; #endif /* SYSEMU_CPU_OPS_H */ diff --git a/monitor/hmp-cmds-target.c b/monitor/hmp-cmds-target.c index 60a8bd0c37..3393e5ad0b 100644 --- a/monitor/hmp-cmds-target.c +++ b/monitor/hmp-cmds-target.c @@ -318,6 +318,7 @@ void hmp_info_pg(Monitor *mon, const QDict *qdict) /* Print last entry, if one present */ cc->sysemu_ops->mon_flush_page_print_state(cs, &state); } + static void memory_dump(Monitor *mon, int count, int format, int wsize, hwaddr addr, int is_physical) { diff --git a/target/i386/cpu.h b/target/i386/cpu.h index cbb6f6fc4d..1346ec0033 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -2167,6 +2167,8 @@ bool x86_mon_init_page_table_iterator(Monitor *mon, struct mem_print_state *state); void x86_mon_info_pg_print_header(Monitor *mon, struct mem_print_state *state); bool x86_mon_flush_print_pg_state(CPUState *cs, struct mem_print_state *state); +void x86_mon_print_pte(Monitor *mon, CPUArchState *env, hwaddr addr, + hwaddr pte); void x86_cpu_dump_state(CPUState *cs, FILE *f, int flags); diff --git a/target/i386/monitor.c b/target/i386/monitor.c index 65e82e73e8..ecde164857 100644 --- a/target/i386/monitor.c +++ b/target/i386/monitor.c @@ -214,202 +214,71 @@ 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(Monitor *mon, CPUArchState *env, hwaddr addr, + hwaddr pte) { + char buf[128]; + char *pos = buf, *end = buf + sizeof(buf); + 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' : '-'); -} + pos += snprintf(pos, end - pos, HWADDR_FMT_plx ": " HWADDR_FMT_plx " ", + addr, (hwaddr) (pte & PG_ADDRESS_MASK)); -static void tlb_info_32(Monitor *mon, CPUArchState *env) -{ - unsigned int l1, l2; - uint32_t pgd, pde, pte; + pos += snprintf(pos, end - pos, " %s", pg_bits(pte)); - 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); - } - } - } - } + /* Trim line to fit screen */ + if (pos - buf > 79) { + strcpy(buf + 77, ".."); } -} -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; - - 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); - } - } - } - } - } - } - } + monitor_printf(mon, "%s\n", buf); } -#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, PTE_t *pte, + vaddr vaddr_in, int height, int offset) { - 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; - } + struct mem_print_state *state = (struct mem_print_state *) data; + CPUClass *cc = CPU_GET_CLASS(cs); - 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; - } - - 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; - } - - 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); - } - } - } - } - } + cc->sysemu_ops->mon_print_pte(state->mon, state->env, vaddr_in, + pte->pte64_t); + return 0; } -static void tlb_info_la57(Monitor *mon, CPUArchState *env) +void hmp_info_tlb(Monitor *mon, const QDict *qdict) { - uint64_t l0; - uint64_t pml5e; - uint64_t pml5_addr; + struct mem_print_state state; - 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); - } + CPUState *cs = mon_get_cpu(mon); + if (!cs) { + monitor_printf(mon, "Unable to get CPUState. Internal error\n"); + return; } -} -#endif /* TARGET_X86_64 */ -void hmp_info_tlb(Monitor *mon, const QDict *qdict) -{ - CPUArchState *env; + CPUClass *cc = CPU_GET_CLASS(cs); - env = mon_get_cpu_env(mon); - if (!env) { - monitor_printf(mon, "No CPU available\n"); - return; + if ((!cc->sysemu_ops->pte_child) + || (!cc->sysemu_ops->pte_leaf) + || (!cc->sysemu_ops->pte_leaf_page_size) + || (!cc->sysemu_ops->page_table_entries_per_node) + || (!cc->sysemu_ops->pte_flags) + || (!cc->sysemu_ops->mon_print_pte) + || (!cc->sysemu_ops->mon_init_page_table_iterator)) { + monitor_printf(mon, "Info tlb unsupported on this ISA\n"); } - if (!(env->cr[0] & CR0_PG_MASK)) { - monitor_printf(mon, "PG disabled\n"); + if (!cc->sysemu_ops->mon_init_page_table_iterator(mon, &state)) { + monitor_printf(mon, "Unable to initialize page table iterator\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); - } + + /** + * '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); } static void mem_print(Monitor *mon, CPUArchState *env,