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| author | Paulo Alcantara <pcacjr@gmail.com> | 2015-06-28 14:58:56 -0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2015-07-07 13:12:22 +0300 |
| commit | 920557971b60e53c2f3f22e5d6c620ab1ed411fd (patch) | |
| tree | 5630d4b1c74b28ba22273d5980ecedcbe367fa38 /hw/i386 | |
| parent | 71ba2f0af398f616e154137d9fdda25c2da01324 (diff) | |
| download | qemu-920557971b60e53c2f3f22e5d6c620ab1ed411fd.tar.gz qemu-920557971b60e53c2f3f22e5d6c620ab1ed411fd.tar.bz2 qemu-920557971b60e53c2f3f22e5d6c620ab1ed411fd.zip | |
ich9: add TCO interface emulation
This interface provides some registers within a 32-byte range and can be
acessed through PCI-to-LPC bridge interface (PMBASE + 0x60).
It's commonly used as a watchdog timer to detect system lockups through
SMIs that are generated -- if TCO_EN bit is set -- on every timeout. If
NO_REBOOT bit is not set in GCS (General Control and Status register),
the system will be resetted upon second timeout if TCO_RLD register
wasn't previously written to prevent timeout.
This patch adds support to TCO watchdog logic and few other features
like mapping NMIs to SMIs (NMI2SMI_EN bit), system intruder detection,
etc. are not implemented yet.
Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/i386')
| -rw-r--r-- | hw/i386/pc_q35.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c index 8aa3a67fdf..24ee08657d 100644 --- a/hw/i386/pc_q35.c +++ b/hw/i386/pc_q35.c @@ -253,7 +253,7 @@ static void pc_q35_init(MachineState *machine) (pc_machine->vmport != ON_OFF_AUTO_ON), 0xff0104); /* connect pm stuff to lpc */ - ich9_lpc_pm_init(lpc, pc_machine_is_smm_enabled(pc_machine)); + ich9_lpc_pm_init(lpc, pc_machine_is_smm_enabled(pc_machine), !mc->no_tco); /* ahci and SATA device, for q35 1 ahci controller is built-in */ ahci = pci_create_simple_multifunction(host_bus, @@ -397,6 +397,7 @@ static void pc_q35_2_4_machine_options(MachineClass *m) m->default_machine_opts = "firmware=bios-256k.bin"; m->default_display = "std"; m->no_floppy = 1; + m->no_tco = 0; m->alias = "q35"; } @@ -408,6 +409,7 @@ static void pc_q35_2_3_machine_options(MachineClass *m) { pc_q35_2_4_machine_options(m); m->no_floppy = 0; + m->no_tco = 1; m->alias = NULL; SET_MACHINE_COMPAT(m, PC_COMPAT_2_3); } |