target/openrisc: Implement full vmstate serialization
Previously serialization did not persist the tlb, timer, pic and other key state items. This meant snapshotting and restoring a running os would crash. After adding these I am able to take snapshots of a running linux os and restore at a later time. I am currently not trying to maintain capatibility with older versions as I do not believe this really worked before or anyone used it. Signed-off-by: Stafford Horne <shorne@gmail.com>
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@ -24,6 +24,63 @@
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#include "hw/boards.h"
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#include "migration/cpu.h"
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static int env_post_load(void *opaque, int version_id)
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{
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CPUOpenRISCState *env = opaque;
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/* Restore MMU handlers */
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if (env->sr & SR_DME) {
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env->tlb->cpu_openrisc_map_address_data =
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&cpu_openrisc_get_phys_data;
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} else {
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env->tlb->cpu_openrisc_map_address_data =
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&cpu_openrisc_get_phys_nommu;
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}
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if (env->sr & SR_IME) {
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env->tlb->cpu_openrisc_map_address_code =
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&cpu_openrisc_get_phys_code;
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} else {
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env->tlb->cpu_openrisc_map_address_code =
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&cpu_openrisc_get_phys_nommu;
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}
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return 0;
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}
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static const VMStateDescription vmstate_tlb_entry = {
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.name = "tlb_entry",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField[]) {
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VMSTATE_UINTTL(mr, OpenRISCTLBEntry),
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VMSTATE_UINTTL(tr, OpenRISCTLBEntry),
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VMSTATE_END_OF_LIST()
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}
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};
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static const VMStateDescription vmstate_cpu_tlb = {
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.name = "cpu_tlb",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField[]) {
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VMSTATE_STRUCT_2DARRAY(itlb, CPUOpenRISCTLBContext,
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ITLB_WAYS, ITLB_SIZE, 0,
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vmstate_tlb_entry, OpenRISCTLBEntry),
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VMSTATE_STRUCT_2DARRAY(dtlb, CPUOpenRISCTLBContext,
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DTLB_WAYS, DTLB_SIZE, 0,
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vmstate_tlb_entry, OpenRISCTLBEntry),
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VMSTATE_END_OF_LIST()
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}
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};
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#define VMSTATE_CPU_TLB(_f, _s) \
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VMSTATE_STRUCT_POINTER(_f, _s, vmstate_cpu_tlb, CPUOpenRISCTLBContext)
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static int get_sr(QEMUFile *f, void *opaque, size_t size, VMStateField *field)
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{
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CPUOpenRISCState *env = opaque;
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@ -47,8 +104,9 @@ static const VMStateInfo vmstate_sr = {
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static const VMStateDescription vmstate_env = {
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.name = "env",
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.version_id = 5,
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.minimum_version_id = 5,
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.version_id = 6,
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.minimum_version_id = 6,
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.post_load = env_post_load,
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.fields = (VMStateField[]) {
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VMSTATE_UINTTL_2DARRAY(shadow_gpr, CPUOpenRISCState, 16, 32),
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VMSTATE_UINTTL(pc, CPUOpenRISCState),
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@ -79,9 +137,20 @@ static const VMStateDescription vmstate_env = {
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VMSTATE_UINT32(cpucfgr, CPUOpenRISCState),
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VMSTATE_UINT32(dmmucfgr, CPUOpenRISCState),
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VMSTATE_UINT32(immucfgr, CPUOpenRISCState),
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VMSTATE_UINT32(evbar, CPUOpenRISCState),
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VMSTATE_UINT32(esr, CPUOpenRISCState),
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VMSTATE_UINT32(fpcsr, CPUOpenRISCState),
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VMSTATE_UINT64(mac, CPUOpenRISCState),
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VMSTATE_CPU_TLB(tlb, CPUOpenRISCState),
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VMSTATE_TIMER_PTR(timer, CPUOpenRISCState),
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VMSTATE_UINT32(ttmr, CPUOpenRISCState),
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VMSTATE_UINT32(ttcr, CPUOpenRISCState),
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VMSTATE_UINT32(picmr, CPUOpenRISCState),
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VMSTATE_UINT32(picsr, CPUOpenRISCState),
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VMSTATE_END_OF_LIST()
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}
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};
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