/*H:120 This is the core hypercall routine: where the Guest gets what it wants. * Or gets killed. Or, in the case of LHCALL_SHUTDOWN, both. */ static void do_hcall(struct lg_cpu *cpu, struct hcall_args *args) { switch (args->arg0) { case LHCALL_FLUSH_ASYNC: /* This call does nothing, except by breaking out of the Guest * it makes us process all the asynchronous hypercalls. */ break; case LHCALL_LGUEST_INIT: /* You can't get here unless you're already initialized. Don't * do that. */ kill_guest(cpu, "already have lguest_data"); break; case LHCALL_SHUTDOWN: { /* Shutdown is such a trivial hypercall that we do it in four * lines right here. */ char msg[128]; /* If the lgread fails, it will call kill_guest() itself; the * kill_guest() with the message will be ignored. */ __lgread(cpu, msg, args->arg1, sizeof(msg)); msg[sizeof(msg)-1] = '\0'; kill_guest(cpu, "CRASH: %s", msg); if (args->arg2 == LGUEST_SHUTDOWN_RESTART) cpu->lg->dead = ERR_PTR(-ERESTART); break; } case LHCALL_FLUSH_TLB: /* FLUSH_TLB comes in two flavors, depending on the * argument: */ if (args->arg1) guest_pagetable_clear_all(cpu); else guest_pagetable_flush_user(cpu); break; /* All these calls simply pass the arguments through to the right * routines. */ case LHCALL_NEW_PGTABLE: guest_new_pagetable(cpu, args->arg1); break; case LHCALL_SET_STACK: guest_set_stack(cpu, args->arg1, args->arg2, args->arg3); break; case LHCALL_SET_PTE: guest_set_pte(cpu, args->arg1, args->arg2, __pte(args->arg3)); break; case LHCALL_SET_PMD: guest_set_pmd(cpu->lg, args->arg1, args->arg2); break; case LHCALL_SET_CLOCKEVENT: guest_set_clockevent(cpu, args->arg1); break; case LHCALL_TS: /* This sets the TS flag, as we saw used in run_guest(). */ cpu->ts = args->arg1; break; case LHCALL_HALT: /* Similarly, this sets the halted flag for run_guest(). */ cpu->halted = 1; break; case LHCALL_NOTIFY: cpu->pending_notify = args->arg1; break; default: /* It should be an architecture-specific hypercall. */ if (lguest_arch_do_hcall(cpu, args)) kill_guest(cpu, "Bad hypercall %li\n", args->arg0); } }
static void do_hcall(struct lg_cpu *cpu, struct hcall_args *args) { switch (args->arg0) { case LHCALL_FLUSH_ASYNC: break; case LHCALL_SEND_INTERRUPTS: break; case LHCALL_LGUEST_INIT: kill_guest(cpu, "already have lguest_data"); break; case LHCALL_SHUTDOWN: { char msg[128]; __lgread(cpu, msg, args->arg1, sizeof(msg)); msg[sizeof(msg)-1] = '\0'; kill_guest(cpu, "CRASH: %s", msg); if (args->arg2 == LGUEST_SHUTDOWN_RESTART) cpu->lg->dead = ERR_PTR(-ERESTART); break; } case LHCALL_FLUSH_TLB: if (args->arg1) guest_pagetable_clear_all(cpu); else guest_pagetable_flush_user(cpu); break; case LHCALL_NEW_PGTABLE: guest_new_pagetable(cpu, args->arg1); break; case LHCALL_SET_STACK: guest_set_stack(cpu, args->arg1, args->arg2, args->arg3); break; case LHCALL_SET_PTE: #ifdef CONFIG_X86_PAE guest_set_pte(cpu, args->arg1, args->arg2, __pte(args->arg3 | (u64)args->arg4 << 32)); #else guest_set_pte(cpu, args->arg1, args->arg2, __pte(args->arg3)); #endif break; case LHCALL_SET_PGD: guest_set_pgd(cpu->lg, args->arg1, args->arg2); break; #ifdef CONFIG_X86_PAE case LHCALL_SET_PMD: guest_set_pmd(cpu->lg, args->arg1, args->arg2); break; #endif case LHCALL_SET_CLOCKEVENT: guest_set_clockevent(cpu, args->arg1); break; case LHCALL_TS: cpu->ts = args->arg1; break; case LHCALL_HALT: cpu->halted = 1; break; case LHCALL_NOTIFY: cpu->pending_notify = args->arg1; break; default: if (lguest_arch_do_hcall(cpu, args)) kill_guest(cpu, "Bad hypercall %li\n", args->arg0); } }