diff options
| -rw-r--r-- | arch/x86/lguest/boot.c | 10 | ||||
| -rw-r--r-- | drivers/lguest/core.c | 16 |
2 files changed, 18 insertions, 8 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 13ee258442ae..f63da5ef217c 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -70,6 +70,7 @@ #include <asm/i387.h> #include <asm/stackprotector.h> #include <asm/reboot.h> /* for struct machine_ops */ +#include <asm/kvm_para.h> /*G:010 * Welcome to the Guest! @@ -455,6 +456,15 @@ static void lguest_cpuid(unsigned int *ax, unsigned int *bx, *ax &= 0xFFFFF0FF; *ax |= 0x00000500; break; + + /* + * This is used to detect if we're running under KVM. We might be, + * but that's a Host matter, not us. So say we're not. + */ + case KVM_CPUID_SIGNATURE: + *bx = *cx = *dx = 0; + break; + /* * 0x80000000 returns the highest Extended Function, so we futureproof * like we do above by limiting it to known fields. diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c index 2535933c49f8..b5fdcb78a75b 100644 --- a/drivers/lguest/core.c +++ b/drivers/lguest/core.c @@ -232,6 +232,13 @@ int run_guest(struct lg_cpu *cpu, unsigned long __user *user) } } + /* + * All long-lived kernel loops need to check with this horrible + * thing called the freezer. If the Host is trying to suspend, + * it stops us. + */ + try_to_freeze(); + /* Check for signals */ if (signal_pending(current)) return -ERESTARTSYS; @@ -246,13 +253,6 @@ int run_guest(struct lg_cpu *cpu, unsigned long __user *user) try_deliver_interrupt(cpu, irq, more); /* - * All long-lived kernel loops need to check with this horrible - * thing called the freezer. If the Host is trying to suspend, - * it stops us. - */ - try_to_freeze(); - - /* * Just make absolutely sure the Guest is still alive. One of * those hypercalls could have been fatal, for example. */ @@ -313,7 +313,7 @@ static int __init init(void) int err; /* Lguest can't run under Xen, VMI or itself. It does Tricky Stuff. */ - if (paravirt_enabled()) { + if (get_kernel_rpl() != 0) { printk("lguest is afraid of being a guest\n"); return -EPERM; } |