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lguest: remove NOTIFY facility from demonstration launcher.

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This was only used for early console, now we can get rid of it altogether.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2015-02-11 15:27:01 +10:30
parent a561adfaec
commit 00f8d54651
1 changed files with 1 additions and 24 deletions
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25
tools/lguest/lguest.c
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@ -1079,23 +1079,6 @@ static void cleanup_devices(void)
tcsetattr(STDIN_FILENO, TCSANOW, &orig_term);
}
/*L:215
* This is the generic routine we call when the Guest uses LHCALL_NOTIFY.
*/
static void handle_output(unsigned long addr)
{
/*
* Early console write is done using notify on a nul-terminated string
* in Guest memory. It's also great for hacking debugging messages
* into a Guest.
*/
if (addr >= guest_limit)
errx(1, "Bad NOTIFY %#lx", addr);
write(STDOUT_FILENO, from_guest_phys(addr),
strnlen(from_guest_phys(addr), guest_limit - addr));
}
/*L:217
* We do PCI. This is mainly done to let us test the kernel virtio PCI
* code.
@ -2662,14 +2645,8 @@ static void __attribute__((noreturn)) run_guest(void)
/* We read from the /dev/lguest device to run the Guest. */
readval = pread(lguest_fd, &notify, sizeof(notify), cpu_id);
/* One unsigned long means the Guest did HCALL_NOTIFY */
if (readval == sizeof(notify)) {
if (notify.trap == 0x1F) {
verbose("Notify on address %#08x\n",
notify.addr);
handle_output(notify.addr);
} else if (notify.trap == 13) {
if (notify.trap == 13) {
verbose("Emulating instruction at %#x\n",
getreg(eip));
emulate_insn(notify.insn);