From patchwork Fri Dec 9 08:08:04 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Congyang X-Patchwork-Id: 130316 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [140.186.70.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 067FE1007D7 for ; Fri, 9 Dec 2011 19:06:20 +1100 (EST) Received: from localhost ([::1]:52323 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RYvTF-0000MQ-67 for incoming@patchwork.ozlabs.org; Fri, 09 Dec 2011 03:06:17 -0500 Received: from eggs.gnu.org ([140.186.70.92]:46736) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RYvT4-0008Rv-Dv for qemu-devel@nongnu.org; Fri, 09 Dec 2011 03:06:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RYvT2-0007s8-Df for qemu-devel@nongnu.org; Fri, 09 Dec 2011 03:06:06 -0500 Received: from [222.73.24.84] (port=60412 helo=song.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RYvT1-0007rY-4W for qemu-devel@nongnu.org; Fri, 09 Dec 2011 03:06:04 -0500 Received: from tang.cn.fujitsu.com (tang.cn.fujitsu.com [10.167.250.3]) by song.cn.fujitsu.com (Postfix) with ESMTP id 1B5D917008D; Fri, 9 Dec 2011 16:05:55 +0800 (CST) Received: from mailserver.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id pB985qBi021986; Fri, 9 Dec 2011 16:05:53 +0800 Received: from [10.167.225.226] ([10.167.225.226]) by mailserver.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.1FP4) with ESMTP id 2011120916052323-373776 ; Fri, 9 Dec 2011 16:05:23 +0800 Message-ID: <4EE1C1E4.4020801@cn.fujitsu.com> Date: Fri, 09 Dec 2011 16:08:04 +0800 From: Wen Congyang User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100413 Fedora/3.0.4-2.fc13 Thunderbird/3.0.4 MIME-Version: 1.0 To: qemu-devel , Jan Kiszka , Dave Anderson , HATAYAMA Daisuke References: <4EE1BF66.7030602@cn.fujitsu.com> In-Reply-To: <4EE1BF66.7030602@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2011-12-09 16:05:23, Serialize by Router on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2011-12-09 16:05:25, Serialize complete at 2011-12-09 16:05:25 X-detected-operating-system: by eggs.gnu.org: FreeBSD 6.x (1) X-Received-From: 222.73.24.84 Subject: [Qemu-devel] [RFC][PATCH 3/5 v2] target-i386: implement cpu_get_memory_mapping() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Walk cpu's page table and collect all virtual address and physical address mapping. Then, add these mapping into memory mapping list. Signed-off-by: Wen Congyang --- cpu-all.h | 10 ++ target-i386/helper.c | 239 ++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 249 insertions(+), 0 deletions(-) diff --git a/cpu-all.h b/cpu-all.h index 7246a67..2f1013f 100644 --- a/cpu-all.h +++ b/cpu-all.h @@ -22,6 +22,7 @@ #include "qemu-common.h" #include "qemu-tls.h" #include "cpu-common.h" +#include "memory_mapping.h" /* some important defines: * @@ -584,4 +585,13 @@ void dump_exec_info(FILE *f, fprintf_function cpu_fprintf); int cpu_memory_rw_debug(CPUState *env, target_ulong addr, uint8_t *buf, int len, int is_write); +#if defined(TARGET_I386) +void cpu_get_memory_mapping(MemoryMappingList *list, CPUState *env); +#else +static inline void cpu_get_memory_mapping(MemoryMappingList *list, + CPUState *env) +{ +} +#endif + #endif /* CPU_ALL_H */ diff --git a/target-i386/helper.c b/target-i386/helper.c index 2586aff..c33747b 100644 --- a/target-i386/helper.c +++ b/target-i386/helper.c @@ -1290,3 +1290,242 @@ void do_cpu_sipi(CPUState *env) { } #endif + +/* PAE Paging or IA-32e Paging */ +static void walk_pte(MemoryMappingList *list, target_phys_addr_t pte_start_addr, + int32_t a20_mask, target_ulong start_line_addr) +{ + target_phys_addr_t pte_addr, start_paddr; + uint64_t pte; + target_ulong start_vaddr; + int i; + + for (i = 0; i < 512; i++) { + pte_addr = (pte_start_addr + i * 8) & a20_mask; + pte = ldq_phys(pte_addr); + if (!(pte & PG_PRESENT_MASK)) { + /* not present */ + continue; + } + + start_paddr = (pte & ~0xfff) & ~(0x1ULL << 63); + if (is_io_addr(start_paddr)) { + /* I/O region */ + continue; + } + + start_vaddr = start_line_addr | ((i & 0x1fff) << 12); + add_to_memory_mapping(list, start_paddr, start_vaddr, 1 << 12); + } +} + +/* 32-bit Paging */ +static void walk_pte2(MemoryMappingList *list, + target_phys_addr_t pte_start_addr, int32_t a20_mask, + target_ulong start_line_addr) +{ + target_phys_addr_t pte_addr, start_paddr; + uint32_t pte; + target_ulong start_vaddr; + int i; + + for (i = 0; i < 1024; i++) { + pte_addr = (pte_start_addr + i * 4) & a20_mask; + pte = ldl_phys(pte_addr); + if (!(pte & PG_PRESENT_MASK)) { + /* not present */ + continue; + } + + start_paddr = pte & ~0xfff; + if (is_io_addr(start_paddr)) { + /* I/O region */ + continue; + } + + start_vaddr = start_line_addr | ((i & 0x3ff) << 12); + add_to_memory_mapping(list, start_paddr, start_vaddr, 1 << 12); + } +} + +/* PAE Paging or IA-32e Paging */ +static void walk_pde(MemoryMappingList *list, target_phys_addr_t pde_start_addr, + int32_t a20_mask, target_ulong start_line_addr) +{ + target_phys_addr_t pde_addr, pte_start_addr, start_paddr; + uint64_t pde; + target_ulong line_addr, start_vaddr; + int i; + + for (i = 0; i < 512; i++) { + pde_addr = (pde_start_addr + i * 8) & a20_mask; + pde = ldq_phys(pde_addr); + if (!(pde & PG_PRESENT_MASK)) { + /* not present */ + continue; + } + + line_addr = start_line_addr | ((i & 0x1ff) << 21); + if (pde & PG_PSE_MASK) { + /* 2 MB page */ + start_paddr = (pde & ~0x1fffff) & ~(0x1ULL << 63); + if (is_io_addr(start_paddr)) { + /* I/O region */ + continue; + } + start_vaddr = line_addr; + add_to_memory_mapping(list, start_paddr, start_vaddr, 1 << 21); + continue; + } + + pte_start_addr = (pde & ~0xfff) & a20_mask; + walk_pte(list, pte_start_addr, a20_mask, line_addr); + } +} + +/* 32-bit Paging */ +static void walk_pde2(MemoryMappingList *list, + target_phys_addr_t pde_start_addr, int32_t a20_mask, + bool pse) +{ + target_phys_addr_t pde_addr, pte_start_addr, start_paddr; + uint32_t pde; + target_ulong line_addr, start_vaddr; + int i; + + for (i = 0; i < 1024; i++) { + pde_addr = (pde_start_addr + i * 4) & a20_mask; + pde = ldl_phys(pde_addr); + if (!(pde & PG_PRESENT_MASK)) { + /* not present */ + continue; + } + + line_addr = (((unsigned int)i & 0x3ff) << 22); + if ((pde & PG_PSE_MASK) && pse) { + /* 4 MB page */ + start_paddr = (pde & ~0x3fffff) | ((pde & 0x1fe000) << 19); + if (is_io_addr(start_paddr)) { + /* I/O region */ + continue; + } + start_vaddr = line_addr; + add_to_memory_mapping(list, start_paddr, start_vaddr, 1 << 22); + continue; + } + + pte_start_addr = (pde & ~0xfff) & a20_mask; + walk_pte2(list, pte_start_addr, a20_mask, line_addr); + } +} + +/* PAE Paging */ +static void walk_pdpe2(MemoryMappingList *list, + target_phys_addr_t pdpe_start_addr, int32_t a20_mask) +{ + target_phys_addr_t pdpe_addr, pde_start_addr; + uint64_t pdpe; + target_ulong line_addr; + int i; + + for (i = 0; i < 4; i++) { + pdpe_addr = (pdpe_start_addr + i * 8) & a20_mask; + pdpe = ldq_phys(pdpe_addr); + if (!(pdpe & PG_PRESENT_MASK)) { + /* not present */ + continue; + } + + line_addr = (((unsigned int)i & 0x3) << 30); + pde_start_addr = (pdpe & ~0xfff) & a20_mask; + walk_pde(list, pde_start_addr, a20_mask, line_addr); + } +} + +#ifdef TARGET_X86_64 +/* IA-32e Paging */ +static void walk_pdpe(MemoryMappingList *list, + target_phys_addr_t pdpe_start_addr, int32_t a20_mask, + target_ulong start_line_addr) +{ + target_phys_addr_t pdpe_addr, pde_start_addr, start_paddr; + uint64_t pdpe; + target_ulong line_addr, start_vaddr; + int i; + + for (i = 0; i < 512; i++) { + pdpe_addr = (pdpe_start_addr + i * 8) & a20_mask; + pdpe = ldq_phys(pdpe_addr); + if (!(pdpe & PG_PRESENT_MASK)) { + /* not present */ + continue; + } + + line_addr = start_line_addr | ((i & 0x1ffULL) << 30); + if (pdpe & PG_PSE_MASK) { + /* 1 GB page */ + start_paddr = (pdpe & ~0x3fffffff) & ~(0x1ULL << 63); + if (is_io_addr(start_paddr)) { + /* I/O region */ + continue; + } + start_vaddr = line_addr; + add_to_memory_mapping(list, start_paddr, start_vaddr, 1 << 30); + continue; + } + + pde_start_addr = (pdpe & ~0xfff) & a20_mask; + walk_pde(list, pde_start_addr, a20_mask, line_addr); + } +} + +/* IA-32e Paging */ +static void walk_pml4e(MemoryMappingList *list, + target_phys_addr_t pml4e_start_addr, int32_t a20_mask) +{ + target_phys_addr_t pml4e_addr, pdpe_start_addr; + uint64_t pml4e; + target_ulong line_addr; + int i; + + for (i = 0; i < 512; i++) { + pml4e_addr = (pml4e_start_addr + i * 8) & a20_mask; + pml4e = ldq_phys(pml4e_addr); + if (!(pml4e & PG_PRESENT_MASK)) { + /* not present */ + continue; + } + + line_addr = ((i & 0x1ffULL) << 39) | (0xffffULL << 48); + pdpe_start_addr = (pml4e & ~0xfff) & a20_mask; + walk_pdpe(list, pdpe_start_addr, a20_mask, line_addr); + } +} +#endif + +void cpu_get_memory_mapping(MemoryMappingList *list, CPUState *env) +{ + if (env->cr[4] & CR4_PAE_MASK) { +#ifdef TARGET_X86_64 + if (env->hflags & HF_LMA_MASK) { + target_phys_addr_t pml4e_addr; + + pml4e_addr = (env->cr[3] & ~0xfff) & env->a20_mask; + walk_pml4e(list, pml4e_addr, env->a20_mask); + } else +#endif + { + target_phys_addr_t pdpe_addr; + + pdpe_addr = (env->cr[3] & ~0x1f) & env->a20_mask; + walk_pdpe2(list, pdpe_addr, env->a20_mask); + } + } else { + target_phys_addr_t pde_addr; + bool pse; + + pde_addr = (env->cr[3] & ~0xfff) & env->a20_mask; + pse = !!(env->cr[4] & CR4_PSE_MASK); + walk_pde2(list, pde_addr, env->a20_mask, pse); + } +}