diff options
Diffstat (limited to 'hw/i386/x86.c')
| -rw-r--r-- | hw/i386/x86.c | 52 |
1 files changed, 28 insertions, 24 deletions
diff --git a/hw/i386/x86.c b/hw/i386/x86.c index 78cc131926..eaff4227bd 100644 --- a/hw/i386/x86.c +++ b/hw/i386/x86.c @@ -50,6 +50,7 @@ #include "hw/intc/i8259.h" #include "hw/rtc/mc146818rtc.h" #include "target/i386/sev.h" +#include "hw/i386/microvm.h" #include "hw/acpi/cpu_hotplug.h" #include "hw/irq.h" @@ -813,12 +814,18 @@ void x86_load_linux(X86MachineState *x86ms, const char *kernel_filename = machine->kernel_filename; const char *initrd_filename = machine->initrd_filename; const char *dtb_filename = machine->dtb; - const char *kernel_cmdline = machine->kernel_cmdline; + char *kernel_cmdline; SevKernelLoaderContext sev_load_ctx = {}; enum { RNG_SEED_LENGTH = 32 }; - /* Align to 16 bytes as a paranoia measure */ - cmdline_size = (strlen(kernel_cmdline) + 16) & ~15; + /* + * Add the NUL terminator, some padding for the microvm cmdline fiddling + * hack, and then align to 16 bytes as a paranoia measure + */ + cmdline_size = (strlen(machine->kernel_cmdline) + 1 + + VIRTIO_CMDLINE_TOTAL_MAX_LEN + 16) & ~15; + /* Make a copy, since we might append arbitrary bytes to it later. */ + kernel_cmdline = g_strndup(machine->kernel_cmdline, cmdline_size); /* load the kernel header */ f = fopen(kernel_filename, "rb"); @@ -959,12 +966,6 @@ void x86_load_linux(X86MachineState *x86ms, initrd_max = x86ms->below_4g_mem_size - acpi_data_size - 1; } - fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_ADDR, cmdline_addr); - fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE, strlen(kernel_cmdline) + 1); - fw_cfg_add_string(fw_cfg, FW_CFG_CMDLINE_DATA, kernel_cmdline); - sev_load_ctx.cmdline_data = (char *)kernel_cmdline; - sev_load_ctx.cmdline_size = strlen(kernel_cmdline) + 1; - if (protocol >= 0x202) { stl_p(header + 0x228, cmdline_addr); } else { @@ -1091,27 +1092,24 @@ void x86_load_linux(X86MachineState *x86ms, exit(1); } - setup_data_offset = QEMU_ALIGN_UP(kernel_size, 16); - kernel_size = setup_data_offset + sizeof(SetupData) + dtb_size; - kernel = g_realloc(kernel, kernel_size); - - - setup_data = (SetupData *)(kernel + setup_data_offset); + setup_data_offset = cmdline_size; + cmdline_size += sizeof(SetupData) + dtb_size; + kernel_cmdline = g_realloc(kernel_cmdline, cmdline_size); + setup_data = (void *)kernel_cmdline + setup_data_offset; setup_data->next = cpu_to_le64(first_setup_data); - first_setup_data = prot_addr + setup_data_offset; + first_setup_data = cmdline_addr + setup_data_offset; setup_data->type = cpu_to_le32(SETUP_DTB); setup_data->len = cpu_to_le32(dtb_size); - load_image_size(dtb_filename, setup_data->data, dtb_size); } - if (!legacy_no_rng_seed) { - setup_data_offset = QEMU_ALIGN_UP(kernel_size, 16); - kernel_size = setup_data_offset + sizeof(SetupData) + RNG_SEED_LENGTH; - kernel = g_realloc(kernel, kernel_size); - setup_data = (SetupData *)(kernel + setup_data_offset); + if (!legacy_no_rng_seed && protocol >= 0x209) { + setup_data_offset = cmdline_size; + cmdline_size += sizeof(SetupData) + RNG_SEED_LENGTH; + kernel_cmdline = g_realloc(kernel_cmdline, cmdline_size); + setup_data = (void *)kernel_cmdline + setup_data_offset; setup_data->next = cpu_to_le64(first_setup_data); - first_setup_data = prot_addr + setup_data_offset; + first_setup_data = cmdline_addr + setup_data_offset; setup_data->type = cpu_to_le32(SETUP_RNG_SEED); setup_data->len = cpu_to_le32(RNG_SEED_LENGTH); qemu_guest_getrandom_nofail(setup_data->data, RNG_SEED_LENGTH); @@ -1122,6 +1120,12 @@ void x86_load_linux(X86MachineState *x86ms, fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, kernel, kernel_size); } + fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_ADDR, cmdline_addr); + fw_cfg_add_i32(fw_cfg, FW_CFG_CMDLINE_SIZE, cmdline_size); + fw_cfg_add_bytes(fw_cfg, FW_CFG_CMDLINE_DATA, kernel_cmdline, cmdline_size); + sev_load_ctx.cmdline_data = (char *)kernel_cmdline; + sev_load_ctx.cmdline_size = cmdline_size; + fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, prot_addr); fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size); sev_load_ctx.kernel_data = (char *)kernel; @@ -1134,7 +1138,7 @@ void x86_load_linux(X86MachineState *x86ms, * kernel on the other side of the fw_cfg interface matches the hash of the * file the user passed in. */ - if (!sev_enabled()) { + if (!sev_enabled() && first_setup_data) { SetupDataFixup *fixup = g_malloc(sizeof(*fixup)); memcpy(setup, header, MIN(sizeof(header), setup_size)); |