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lguest: write more information to userspace about pending traps.

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This is preparation for userspace handling MMIO and ioport accesses.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2015-02-11 15:15:09 +10:30
parent 18c137371b
commit 69a09dc174
6 changed files with 42 additions and 18 deletions
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7
drivers/lguest/hypercalls.c
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@@ -118,7 +118,8 @@ static void do_hcall(struct lg_cpu *cpu, struct hcall_args *args)
cpu->halted = 1;
break;
case LHCALL_NOTIFY:
cpu->pending_notify = args->arg1;
cpu->pending.trap = LGUEST_TRAP_ENTRY;
cpu->pending.addr = args->arg1;
break;
default:
/* It should be an architecture-specific hypercall. */
@@ -189,7 +190,7 @@ static void do_async_hcalls(struct lg_cpu *cpu)
* Stop doing hypercalls if they want to notify the Launcher:
* it needs to service this first.
*/
if (cpu->pending_notify)
if (cpu->pending.trap)
break;
}
}
@@ -280,7 +281,7 @@ void do_hypercalls(struct lg_cpu *cpu)
* NOTIFY to the Launcher, we want to return now. Otherwise we do
* the hypercall.
*/
if (!cpu->pending_notify) {
if (!cpu->pending.trap) {
do_hcall(cpu, cpu->hcall);
/*
* Tricky point: we reset the hcall pointer to mark the