Revision 133bb095 hw/block/pc_sysfw.c
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bios); |
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} |
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/* |
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* Bug-compatible flash vs. ROM selection enabled? |
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* A few older machines enable this. |
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*/ |
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bool pc_sysfw_flash_vs_rom_bug_compatible; |
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void pc_system_firmware_init(MemoryRegion *rom_memory) |
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{
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DriveInfo *pflash_drv; |
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pflash_drv = drive_get(IF_PFLASH, 0, 0); |
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if (pc_sysfw_flash_vs_rom_bug_compatible) {
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/* |
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* This is a Bad Idea, because it makes enabling/disabling KVM |
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* guest-visible. Do it only in bug-compatibility mode. |
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*/ |
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if (kvm_enabled()) {
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if (pflash_drv != NULL) {
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fprintf(stderr, "qemu: pflash cannot be used with kvm enabled\n"); |
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exit(1); |
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} else {
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/* In old pc_sysfw_flash_vs_rom_bug_compatible mode, we assume |
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* that KVM cannot execute from device memory. In this case, we |
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* use old rom based firmware initialization for KVM. But, since |
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* this is different from non-kvm mode, this behavior is |
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* undesirable */ |
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sysfw_dev->rom_only = 1; |
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} |
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} |
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} else if (pflash_drv == NULL) {
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if (pflash_drv == NULL) {
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/* When a pflash drive is not found, use rom-mode */ |
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sysfw_dev->rom_only = 1; |
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} else if (kvm_enabled() && !kvm_readonly_mem_enabled()) {
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