kvm: Allow arch to set sigmask length
MIPS/Linux is unusual in having 128 signals rather than just 64 like
most other architectures. This means its sigmask is 16 bytes instead of
8, so allow arches to override the sigmask->len value passed to the
KVM_SET_SIGNAL_MASK ioctl in kvm_set_signal_mask() by calling
kvm_set_sigmask_len() from kvm_arch_init(). Otherwise default to 8
bytes.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Sanjay Lal <sanjayl@kymasys.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/kvm-all.c b/kvm-all.c
index 56a251b..3142335 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -99,6 +99,7 @@
* they're not. Linux, glibc and *BSD all treat ioctl numbers as
* unsigned, and treating them as signed here can break things */
unsigned irq_set_ioctl;
+ unsigned int sigmask_len;
#ifdef KVM_CAP_IRQ_ROUTING
struct kvm_irq_routing *irq_routes;
int nr_allocated_irq_routes;
@@ -1397,6 +1398,8 @@
assert(TARGET_PAGE_SIZE <= getpagesize());
page_size_init();
+ s->sigmask_len = 8;
+
#ifdef KVM_CAP_SET_GUEST_DEBUG
QTAILQ_INIT(&s->kvm_sw_breakpoints);
#endif
@@ -1575,6 +1578,11 @@
return ret;
}
+void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len)
+{
+ s->sigmask_len = sigmask_len;
+}
+
static void kvm_handle_io(uint16_t port, void *data, int direction, int size,
uint32_t count)
{
@@ -2095,6 +2103,7 @@
int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset)
{
+ KVMState *s = kvm_state;
struct kvm_signal_mask *sigmask;
int r;
@@ -2104,7 +2113,7 @@
sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset));
- sigmask->len = 8;
+ sigmask->len = s->sigmask_len;
memcpy(sigmask->sigset, sigset, sizeof(*sigset));
r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask);
g_free(sigmask);
