X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fsvm_io.c;h=4ad954dae71d4195ea31f2be5e05822cab32fcda;hb=e43bd94d31ec809a8a4e80561bdb41d684f86288;hp=1ec4a60a7b37d1c326fddd76e29f4dcd1e517e9e;hpb=4290e5f20a4ea5e5f32cb8228ac4d7446dc1021b;p=palacios.git diff --git a/palacios/src/palacios/svm_io.c b/palacios/src/palacios/svm_io.c index 1ec4a60..4ad954d 100644 --- a/palacios/src/palacios/svm_io.c +++ b/palacios/src/palacios/svm_io.c @@ -17,20 +17,21 @@ * redistribute, and modify it as specified in the file "V3VEE_LICENSE". */ + #include #include #include #include #include -#ifndef CONFIG_DEBUG_IO +#ifndef V3_CONFIG_DEBUG_IO #undef PrintDebug #define PrintDebug(fmt, args...) #endif -static int update_map(struct guest_info * info, uint16_t port, int hook_read, int hook_write) { - uchar_t * bitmap = (uint8_t *)(info->io_map.arch_data);; +static int update_map(struct v3_vm_info * vm, uint16_t port, int hook_read, int hook_write) { + uchar_t * bitmap = (uint8_t *)(vm->io_map.arch_data);; int major = port / 8; int minor = port % 8; @@ -44,32 +45,30 @@ static int update_map(struct guest_info * info, uint16_t port, int hook_read, in } -int v3_init_svm_io_map(struct guest_info * info) { - info->io_map.update_map = update_map; +int v3_init_svm_io_map(struct v3_vm_info * vm) { + vm->io_map.update_map = update_map; + + vm->io_map.arch_data = V3_VAddr(V3_AllocPages(3)); + memset(vm->io_map.arch_data, 0xff, PAGE_SIZE_4KB * 3); - info->io_map.arch_data = V3_VAddr(V3_AllocPages(3)); - memset(info->io_map.arch_data, 0, PAGE_SIZE_4KB * 3); + v3_refresh_io_map(vm); - v3_refresh_io_map(info); + return 0; +} +int v3_deinit_svm_io_map(struct v3_vm_info * vm) { + V3_FreePages(V3_PAddr(vm->io_map.arch_data), 3); return 0; } // This should package up an IO request and call vmm_handle_io -int v3_handle_svm_io_in(struct guest_info * info, struct svm_io_info * io_info) { - struct v3_io_hook * hook = v3_get_io_hook(info, io_info->port); +int v3_handle_svm_io_in(struct guest_info * core, struct svm_io_info * io_info) { + struct v3_io_hook * hook = v3_get_io_hook(core->vm_info, io_info->port); int read_size = 0; - if (hook == NULL) { - PrintError("Hook Not present for in on port 0x%x\n", io_info->port); - // error, we should not have exited on this port - return -1; - } - - if (io_info->sz8) { read_size = 1; } else if (io_info->sz16) { @@ -80,11 +79,19 @@ int v3_handle_svm_io_in(struct guest_info * info, struct svm_io_info * io_info) PrintDebug("IN of %d bytes on port %d (0x%x)\n", read_size, io_info->port, io_info->port); - if (hook->read(io_info->port, &(info->vm_regs.rax), read_size, hook->priv_data) != read_size) { - // not sure how we handle errors..... - PrintError("Read Failure for in on port 0x%x\n", io_info->port); - return -1; + if (hook == NULL) { + PrintDebug("IN operation on unhooked IO port 0x%x - returning zero\n", io_info->port); + core->vm_regs.rax >>= 8*read_size; + core->vm_regs.rax <<= 8*read_size; + + } else { + if (hook->read(core, io_info->port, &(core->vm_regs.rax), read_size, hook->priv_data) != read_size) { + // not sure how we handle errors..... + PrintError("Read Failure for in on port 0x%x\n", io_info->port); + return -1; + } } + return 0; } @@ -96,13 +103,13 @@ int v3_handle_svm_io_in(struct guest_info * info, struct svm_io_info * io_info) /* We might not handle wrap around of the RDI register correctly... * In that if we do wrap around the effect will manifest in the higher bits of the register */ -int v3_handle_svm_io_ins(struct guest_info * info, struct svm_io_info * io_info) { - struct v3_io_hook * hook = v3_get_io_hook(info, io_info->port); +int v3_handle_svm_io_ins(struct guest_info * core, struct svm_io_info * io_info) { + struct v3_io_hook * hook = v3_get_io_hook(core->vm_info, io_info->port); int read_size = 0; addr_t dst_addr = 0; uint_t rep_num = 1; ullong_t mask = 0; - struct v3_segment * theseg = &(info->segments.es); // default is ES + struct v3_segment * theseg = &(core->segments.es); // default is ES addr_t inst_ptr; @@ -110,22 +117,14 @@ int v3_handle_svm_io_ins(struct guest_info * info, struct svm_io_info * io_info) // direction can equal either 1 or -1 // We will multiply the final added offset by this value to go the correct direction int direction = 1; - struct rflags * flags = (struct rflags *)&(info->ctrl_regs.rflags); + struct rflags * flags = (struct rflags *)&(core->ctrl_regs.rflags); if (flags->df) { direction = -1; } + - - if (hook == NULL) { - PrintError("Hook Not present for ins on port 0x%x\n", io_info->port); - // error, we should not have exited on this port - return -1; - } - - - - if (guest_va_to_host_va(info, get_addr_linear(info, info->rip, &(info->segments.cs)), &inst_ptr) == -1) { + if (v3_gva_to_hva(core, get_addr_linear(core, core->rip, &(core->segments.cs)), &inst_ptr) == -1) { PrintError("Can't access instruction\n"); return -1; } @@ -133,22 +132,22 @@ int v3_handle_svm_io_ins(struct guest_info * info, struct svm_io_info * io_info) while (is_prefix_byte(*((char *)inst_ptr))) { switch (*((char *)inst_ptr)) { case PREFIX_CS_OVERRIDE: - theseg = &(info->segments.cs); + theseg = &(core->segments.cs); break; case PREFIX_SS_OVERRIDE: - theseg = &(info->segments.ss); + theseg = &(core->segments.ss); break; case PREFIX_DS_OVERRIDE: - theseg = &(info->segments.ds); + theseg = &(core->segments.ds); break; case PREFIX_ES_OVERRIDE: - theseg = &(info->segments.es); + theseg = &(core->segments.es); break; case PREFIX_FS_OVERRIDE: - theseg = &(info->segments.fs); + theseg = &(core->segments.fs); break; case PREFIX_GS_OVERRIDE: - theseg = &(info->segments.gs); + theseg = &(core->segments.gs); break; default: break; @@ -179,7 +178,7 @@ int v3_handle_svm_io_ins(struct guest_info * info, struct svm_io_info * io_info) mask = 0xffffffffffffffffLL; } else { // This value should be set depending on the host register size... - mask = get_gpr_mask(info); + mask = get_gpr_mask(core); PrintDebug("INS io_info invalid address size, mask=0x%p, io_info=0x%p\n", (void *)(addr_t)mask, (void *)(addr_t)(io_info)); @@ -188,35 +187,40 @@ int v3_handle_svm_io_ins(struct guest_info * info, struct svm_io_info * io_info) } if (io_info->rep) { - rep_num = info->vm_regs.rcx & mask; + rep_num = core->vm_regs.rcx & mask; //rep_num = info->vm_regs.rcx; } - PrintDebug("INS size=%d for %d steps\n", read_size, rep_num); while (rep_num > 0) { addr_t host_addr; - dst_addr = get_addr_linear(info, (info->vm_regs.rdi & mask), theseg); + dst_addr = get_addr_linear(core, (core->vm_regs.rdi & mask), theseg); // PrintDebug("Writing 0x%p\n", (void *)dst_addr); - if (guest_va_to_host_va(info, dst_addr, &host_addr) == -1) { + if (v3_gva_to_hva(core, dst_addr, &host_addr) == -1) { // either page fault or gpf... PrintError("Could not convert Guest VA to host VA\n"); return -1; } - if (hook->read(io_info->port, (char *)host_addr, read_size, hook->priv_data) != read_size) { - // not sure how we handle errors..... - PrintError("Read Failure for ins on port 0x%x\n", io_info->port); - return -1; + if (hook == NULL) { + PrintDebug("INS operation on unhooked IO port 0x%x - returning zeros\n", io_info->port); + memset((char*)host_addr,0,read_size); + + } else { + if (hook->read(core, io_info->port, (char *)host_addr, read_size, hook->priv_data) != read_size) { + // not sure how we handle errors..... + PrintError("Read Failure for ins on port 0x%x\n", io_info->port); + return -1; + } } - - info->vm_regs.rdi += (read_size * direction); + + core->vm_regs.rdi += (read_size * direction); if (io_info->rep) { - info->vm_regs.rcx--; + core->vm_regs.rcx--; } rep_num--; @@ -225,17 +229,10 @@ int v3_handle_svm_io_ins(struct guest_info * info, struct svm_io_info * io_info) return 0; } -int v3_handle_svm_io_out(struct guest_info * info, struct svm_io_info * io_info) { - struct v3_io_hook * hook = v3_get_io_hook(info, io_info->port); +int v3_handle_svm_io_out(struct guest_info * core, struct svm_io_info * io_info) { + struct v3_io_hook * hook = v3_get_io_hook(core->vm_info, io_info->port); int write_size = 0; - if (hook == NULL) { - PrintError("Hook Not present for out on port 0x%x\n", io_info->port); - // error, we should not have exited on this port - return -1; - } - - if (io_info->sz8) { write_size = 1; } else if (io_info->sz16) { @@ -246,11 +243,16 @@ int v3_handle_svm_io_out(struct guest_info * info, struct svm_io_info * io_info) PrintDebug("OUT of %d bytes on port %d (0x%x)\n", write_size, io_info->port, io_info->port); - if (hook->write(io_info->port, &(info->vm_regs.rax), write_size, hook->priv_data) != write_size) { - // not sure how we handle errors..... - PrintError("Write Failure for out on port 0x%x\n", io_info->port); - return -1; + if (hook == NULL) { + PrintDebug("OUT operation on unhooked IO port 0x%x - ignored\n", io_info->port); + } else { + if (hook->write(core, io_info->port, &(core->vm_regs.rax), write_size, hook->priv_data) != write_size) { + // not sure how we handle errors..... + PrintError("Write Failure for out on port 0x%x\n", io_info->port); + return -1; + } } + return 0; } @@ -260,33 +262,26 @@ int v3_handle_svm_io_out(struct guest_info * info, struct svm_io_info * io_info) * In that if we do wrap around the effect will manifest in the higher bits of the register */ -int v3_handle_svm_io_outs(struct guest_info * info, struct svm_io_info * io_info) { +int v3_handle_svm_io_outs(struct guest_info * core, struct svm_io_info * io_info) { - struct v3_io_hook * hook = v3_get_io_hook(info, io_info->port); + struct v3_io_hook * hook = v3_get_io_hook(core->vm_info, io_info->port); int write_size = 0; addr_t dst_addr = 0; uint_t rep_num = 1; ullong_t mask = 0; addr_t inst_ptr; - struct v3_segment * theseg = &(info->segments.es); // default is ES + struct v3_segment * theseg = &(core->segments.ds); // default is DS // This is kind of hacky... // direction can equal either 1 or -1 // We will multiply the final added offset by this value to go the correct direction int direction = 1; - struct rflags * flags = (struct rflags *)&(info->ctrl_regs.rflags); + struct rflags * flags = (struct rflags *)&(core->ctrl_regs.rflags); if (flags->df) { direction = -1; } - - if (hook == NULL) { - PrintError("Hook Not present for outs on port 0x%x\n", io_info->port); - // error, we should not have exited on this port - return -1; - } - PrintDebug("OUTS on port %d (0x%x)\n", io_info->port, io_info->port); if (io_info->sz8) { @@ -306,7 +301,7 @@ int v3_handle_svm_io_outs(struct guest_info * info, struct svm_io_info * io_inf mask = 0xffffffffffffffffLL; } else { // This value should be set depending on the host register size... - mask = get_gpr_mask(info); + mask = get_gpr_mask(core); PrintDebug("OUTS io_info invalid address size, mask=0%p, io_info=0x%p\n", (void *)(addr_t)mask, (void *)(addr_t)io_info); @@ -318,13 +313,13 @@ int v3_handle_svm_io_outs(struct guest_info * info, struct svm_io_info * io_inf } if (io_info->rep) { - rep_num = info->vm_regs.rcx & mask; + rep_num = core->vm_regs.rcx & mask; } - if (guest_va_to_host_va(info, get_addr_linear(info, info->rip, &(info->segments.cs)), &inst_ptr) == -1) { + if (v3_gva_to_hva(core, get_addr_linear(core, core->rip, &(core->segments.cs)), &inst_ptr) == -1) { PrintError("Can't access instruction\n"); return -1; } @@ -332,22 +327,22 @@ int v3_handle_svm_io_outs(struct guest_info * info, struct svm_io_info * io_inf while (is_prefix_byte(*((char *)inst_ptr))) { switch (*((char *)inst_ptr)) { case PREFIX_CS_OVERRIDE: - theseg = &(info->segments.cs); + theseg = &(core->segments.cs); break; case PREFIX_SS_OVERRIDE: - theseg = &(info->segments.ss); + theseg = &(core->segments.ss); break; case PREFIX_DS_OVERRIDE: - theseg = &(info->segments.ds); + theseg = &(core->segments.ds); break; case PREFIX_ES_OVERRIDE: - theseg = &(info->segments.es); + theseg = &(core->segments.es); break; case PREFIX_FS_OVERRIDE: - theseg = &(info->segments.fs); + theseg = &(core->segments.fs); break; case PREFIX_GS_OVERRIDE: - theseg = &(info->segments.gs); + theseg = &(core->segments.gs); break; default: break; @@ -358,24 +353,30 @@ int v3_handle_svm_io_outs(struct guest_info * info, struct svm_io_info * io_inf PrintDebug("OUTS size=%d for %d steps\n", write_size, rep_num); while (rep_num > 0) { - addr_t host_addr; + addr_t host_addr = 0; - dst_addr = get_addr_linear(info, (info->vm_regs.rsi & mask), theseg); + dst_addr = get_addr_linear(core, (core->vm_regs.rsi & mask), theseg); - if (guest_va_to_host_va(info, dst_addr, &host_addr) == -1) { - // either page fault or gpf... + if (v3_gva_to_hva(core, dst_addr, &host_addr) == -1) { + PrintError("Could not translate outs dest addr, either page fault or gpf...\n"); + return -1; } - if (hook->write(io_info->port, (char*)host_addr, write_size, hook->priv_data) != write_size) { - // not sure how we handle errors..... - PrintError("Write Failure for outs on port 0x%x\n", io_info->port); - return -1; + if (hook == NULL) { + PrintDebug("OUTS operation on unhooked IO port 0x%x - ignored\n", io_info->port); + } else { + if (hook->write(core, io_info->port, (char*)host_addr, write_size, hook->priv_data) != write_size) { + // not sure how we handle errors..... + PrintError("Write Failure for outs on port 0x%x\n", io_info->port); + return -1; + } } + - info->vm_regs.rsi += write_size * direction; + core->vm_regs.rsi += write_size * direction; if (io_info->rep) { - info->vm_regs.rcx--; + core->vm_regs.rcx--; } rep_num--;