tco: do not generate an NMI

This behavior is not indicated in the datasheet and can confuse the OS. The TCO can trap NMIs from SERR# or IOCHK# and convert them to SMIs; but any other TCO event is either delivered as an SMI or completely disabled. Reviewed-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
qemu · Apr 5, 2017 · 8c9f42f · 8c9f42f
1 parent 87cc4c6
commit 8c9f42f
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diff --git a/hw/acpi/tco.c b/hw/acpi/tco.c
@@ -75,8 +75,6 @@ static void tco_timer_expired(void *opaque)
 
     if (pm->smi_en & ICH9_PMIO_SMI_EN_TCO_EN) {
         ich9_generate_smi();
-    } else {
-        ich9_generate_nmi();
     }
     tr->tco.rld = tr->tco.tmr;
     tco_timer_reload(tr);

diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
@@ -312,11 +312,6 @@ void ich9_generate_smi(void)
     cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI);
 }
 
-void ich9_generate_nmi(void)
-{
-    cpu_interrupt(first_cpu, CPU_INTERRUPT_NMI);
-}
-
 static int ich9_lpc_sci_irq(ICH9LPCState *lpc)
 {
     switch (lpc->d.config[ICH9_LPC_ACPI_CTRL] &

diff --git a/include/hw/i386/ich9.h b/include/hw/i386/ich9.h
@@ -21,7 +21,6 @@ void ich9_lpc_pm_init(PCIDevice *pci_lpc, bool smm_enabled);
 I2CBus *ich9_smb_init(PCIBus *bus, int devfn, uint32_t smb_io_base);
 
 void ich9_generate_smi(void);
-void ich9_generate_nmi(void);
 
 #define ICH9_CC_SIZE (16 * 1024) /* 16KB. Chipset configuration registers */