@@ -4,6 +4,7 @@
*/
#include <xen/acpi.h>
#include <xen/errno.h>
+#include <xen/event.h>
#include <xen/lib.h>
#include <xen/sched.h>
@@ -85,6 +86,17 @@ int hvm_acpi_domctl_access(struct domain *d,
return -EFAULT;
}
+ /*
+ * For simplicity don't verify whether CPU map changed and
+ * always send an SCI on a write (provided it's enabled).
+ */
+ if ( is_write )
+ {
+ d->arch.hvm_domain.acpi.gpe0_sts |= 1U << XEN_ACPI_GPE0_CPUHP_BIT;
+ if ( d->arch.hvm_domain.acpi.gpe0_en & (1U << XEN_ACPI_GPE0_CPUHP_BIT) )
+ send_guest_global_virq(d, VIRQ_SCI);
+ }
+
return 0;
}
@@ -144,6 +156,7 @@ static int acpi_guest_access(int dir, unsigned int port,
else
{
uint32_t v = *val;
+ uint16_t en_orig = *en;
/* Status register is write-1-to-clear */
switch ( port & 3 )
@@ -170,6 +183,13 @@ static int acpi_guest_access(int dir, unsigned int port,
*en = (((v & 0xff) << 8) | (*en & 0xff)) & *mask_en;
break;
}
+
+ /*
+ * If an event became enabled and corresponding status bit is set
+ * then send an SCI to the guest.
+ */
+ if ( (*en & ~en_orig) & *sts )
+ send_guest_global_virq(d, VIRQ_SCI);
}
return X86EMUL_OKAY;
@@ -727,7 +727,7 @@ void send_guest_vcpu_virq(struct vcpu *v, uint32_t virq)
spin_unlock_irqrestore(&v->virq_lock, flags);
}
-static void send_guest_global_virq(struct domain *d, uint32_t virq)
+void send_guest_global_virq(struct domain *d, uint32_t virq)
{
unsigned long flags;
int port;
@@ -739,7 +739,10 @@ static void send_guest_global_virq(struct domain *d, uint32_t virq)
if ( unlikely(d == NULL) || unlikely(d->vcpu == NULL) )
return;
- v = d->vcpu[0];
+ /* Send to first available VCPU */
+ for_each_vcpu(d, v)
+ if ( is_vcpu_online(v) )
+ break;
if ( unlikely(v == NULL) )
return;
@@ -52,6 +52,7 @@ void vcpu_destroy(struct vcpu *v);
int map_vcpu_info(struct vcpu *v, unsigned long gfn, unsigned offset);
void unmap_vcpu_info(struct vcpu *v);
+int arch_update_avail_vcpus(struct domain *d);
int arch_domain_create(struct domain *d, unsigned int domcr_flags,
struct xen_arch_domainconfig *config);
@@ -23,6 +23,14 @@
void send_guest_vcpu_virq(struct vcpu *v, uint32_t virq);
/*
+ * send_guest_global_virq: Notify guest via a global VIRQ.
+ * @d: domain to which virtual IRQ should be sent. First
+ * online VCPU will be selected.
+ * @virq: Virtual IRQ number (VIRQ_*)
+ */
+void send_guest_global_virq(struct domain *d, uint32_t virq);
+
+/*
* send_global_virq: Notify the domain handling a global VIRQ.
* @virq: Virtual IRQ number (VIRQ_*)
*/
Send and SCI when VCPU map is updated by domctl or when guest sets GPE0 enable bit and status bit is already set. Also update send_guest_global_virq() to handle cases when VCPU0 is offlined. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> --- Changes in v6: * Change conditions causing the SCI to be generated: - domctl write to VCPU map - Enabling a pending GPE0 event xen/arch/x86/hvm/acpi.c | 20 ++++++++++++++++++++ xen/common/event_channel.c | 7 +++++-- xen/include/xen/domain.h | 1 + xen/include/xen/event.h | 8 ++++++++ 4 files changed, 34 insertions(+), 2 deletions(-)