FYI these patches are merged in the develop branch atm:
https://gem5-review.googlesource.com/c/public/gem5/+/36795
https://gem5-review.googlesource.com/c/public/gem5/+/31218/6/tests/gem5/configs/arm_generic.py
And they should fix your problem (will be part of gem5 21.0)
The second one is just an example; you should add those lines to your config
script:
if issubclass(self.cpu_class, ArmV8KvmCPU):
GenericTimer.generateDeviceTree = SimObject.generateDeviceTree
system.realview.gic.simulate_gic = True
Would you let me know if these patches alone are enough to solve your problem?
(Commenting Liyichao's changes below)
> -----Original Message-----
> From: Tracy Mac via gem5-users <gem5-users@gem5.org>
> Sent: 26 January 2021 11:50
> To: Liyichao <liyic...@huawei.com>
> Cc: gem5 users mailing list <gem5-users@gem5.org>; Tracy Mac
> <fgzs...@gmail.com>
> Subject: [gem5-users] Re: KVM Doesn't Work
>
> Hi Liyichao！
> Thanks, I'll check it out.
>
> On Tue, Jan 26, 2021 at 7:44 PM Liyichao <liyic...@huawei.com> wrote:
> >
> > You have to modify TIMER and GIC.
> >
> >
> > diff --git a/src/dev/arm/GenericTimer.py b/src/dev/arm/GenericTimer.py
> > index ed81b2471..aee15b738 100644
> > --- a/src/dev/arm/GenericTimer.py
> > +++ b/src/dev/arm/GenericTimer.py
> > @@ -98,6 +98,7 @@ Reference:
> > # value, so this initial value will be discarded
> > cntfrq = Param.UInt64(0x1800000, "Value for the CNTFRQ timer
> > register")
> >
> > + '''
> > def generateDeviceTree(self, state):
> > node = FdtNode("timer")
> >
> > @@ -115,7 +116,8 @@ Reference:
> > node.append(self.counter.unproxy(self).generateDtb())
> >
> > yield node
> > -
> > + '''
> > +
> > class GenericTimerFrame(PioDevice):
> > """
> > Memory-mapped timer frame implementation. Controlled from
> > GenericTimerMem, diff --git a/src/dev/arm/RealView.py
> > b/src/dev/arm/RealView.py index 9ab04725d..3fd0e9168 100644
> > --- a/src/dev/arm/RealView.py
> > +++ b/src/dev/arm/RealView.py
> > @@ -67,8 +67,10 @@ from m5.objects.SMMUv3 import SMMUv3 #
> emulation.
> > Use a GIC model that automatically switches between # gem5's GIC
> > model and KVM's GIC model if KVM is available.
> > try:
> > - from m5.objects.KvmGic import MuxingKvmGic
> > - kvm_gicv2_class = MuxingKvmGic
> > + # from m5.objects.KvmGic import MuxingKvmGic
> > + # kvm_gicv2_class = MuxingKvmGic
> > + from m5.objects.KvmGic import Gic400
> > + kvm_gicv2_class = Gic400
> > except ImportError:
> > # KVM support wasn't compiled into gem5. Fallback to a
> > # software-only GIC.
> > diff --git a/src/dev/arm/generic_timer.cc
> > b/src/dev/arm/generic_timer.cc index 458a2eb7a..509153cab 100644
> > --- a/src/dev/arm/generic_timer.cc
> > +++ b/src/dev/arm/generic_timer.cc
> > @@ -289,8 +289,12 @@ ArchTimer::updateCounter()
> > _interrupt->clear();
> > }
> >
> > - _control.istatus = 0;
> > -
> > + // _control.istatus = 0;
> > + if (_control.istatus) {
> > + DPRINTF(Timer, "Clearing interrupt\n");
> > + _interrupt->clear();
> > + _control.istatus = 0;
> > + }
> > if (scheduleEvents()) {
> > _parent.schedule(_counterLimitReachedEvent,
> > whenValue(_counterLimit)); diff --git
I am not sure this is needed.
First portion of the snippet is already checking if there is a pending
interrupt and it is clearing it if that's the case
(clearing irq and setting istatus to zero)
// Clear the interurpt when timers conditions are not met
if (_interrupt->active()) {
DPRINTF(Timer, "Clearing interrupt\n");
_interrupt->clear();
}
_control.istatus = 0;
> > a/util/m5/src/abi/aarch64/SConsopts
> > b/util/m5/src/abi/aarch64/SConsopts
> > index 47ada0209..683c4f2eb 100644
> > --- a/util/m5/src/abi/aarch64/SConsopts
> > +++ b/util/m5/src/abi/aarch64/SConsopts
> > @@ -27,6 +27,7 @@ Import('*')
> >
> > env['ABI'] = 'aarch64'
> > get_abi_opt('CROSS_COMPILE', 'aarch64-linux-gnu-')
> > +env.Append(CFLAGS='-DM5OP_ADDR=0x10010000')
> >
> > env['CALL_TYPE']['inst'].impl('m5op.S', 'verify_inst.cc',
> > default=True)
> > env['CALL_TYPE']['addr'].impl('m5op_addr.S')
> >
> >
This one is needed to issue memory mapped m5 ops. Gabe refactored the m5
utility so that you can specify this at
Runtime rather than compile time:
$m5 --addr 0x10010000 <op>
I though it was already in 20.1 but I am probably wrong. Again, this will be
part of gem5-21.0 for sure
Kind Regards
Giacomo
> >
> > -----邮件原件-----
> > 发件人: Tracy Mac via gem5-users [mailto:gem5-users@gem5.org]
> > 发送时间: 2021年1月26日 19:09
> > 收件人: gem5 users mailing list <gem5-users@gem5.org>
> > 抄送: Tracy Mac <fgzs...@gmail.com>
> > 主题: [gem5-users] KVM Doesn't Work
> >
> > Hi All
> > I run the fs.py script in gem5(20.1.0.0), but there is no information in the
> m5term console. I don't know what went wrong.
> > In gem5(20.0.0.3 develop),kvm can work very well,I have no idea how to
> change the new version.
> >
> > INFO:
> > gem5 Simulator System. http://gem5.org
> > gem5 is copyrighted software; use the --copyright option for details.
> >
> > gem5 version 20.1.0.2
> > gem5 compiled Jan 26 2021 17:54:32
> > gem5 started Jan 26 2021 18:36:35
> > gem5 executing on ubuntu, pid 28630
> > command line: ./build/ARM/gem5.opt configs/example/fs.py
> > --cpu-type=ArmV8KvmCPU
> > --disk-image=/home/tracy/Desktop/image/aarch-system-20170616/disks/lin
> > aro-minimal-aarch64.img --kernel=/home/tracy/Desktop/vmlinux.euler
> >
> > warn: iobus.slave is deprecated. `slave` is now called
> > `cpu_side_ports`
> > warn: bridge.master is deprecated. `master` is now called
> > `mem_side_port`
> > warn: membus.master is deprecated. `master` is now called
> > `mem_side_ports`
> > warn: bridge.slave is deprecated. `slave` is now called
> > `cpu_side_port`
> > warn: membus.slave is deprecated. `slave` is now called
> > `cpu_side_ports`
> > warn: iobus.master is deprecated. `master` is now called
> > `mem_side_ports`
> > warn: iobridge.slave is deprecated. `slave` is now called
> > `cpu_side_port`
> > warn: membus.slave is deprecated. `slave` is now called
> > `cpu_side_ports`
> > warn: iobridge.master is deprecated. `master` is now called
> > `mem_side_port`
> > warn: membus.slave is deprecated. `slave` is now called
> > `cpu_side_ports`
> > warn: membus.slave is deprecated. `slave` is now called
> > `cpu_side_ports`
> > warn: membus.slave is deprecated. `slave` is now called
> > `cpu_side_ports`
> > warn: membus.slave is deprecated. `slave` is now called
> > `cpu_side_ports`
> > warn: membus.master is deprecated. `master` is now called
> > `mem_side_ports` Global frequency set at 1000000000000 ticks per
> > second
> > warn: No dot file generated. Please install pydot to generate the dot file
> > and
> pdf.
> > warn: DRAM device capacity (8192 Mbytes) does not match the address
> > range assigned (512 Mbytes)
> > info: kernel located at: /home/tracy/Desktop/vmlinux.euler
> > warn: Highest ARM exception-level set to AArch32 but the workload is for
> AArch64. Assuming you wanted these to match.
> > system.vncserver: Listening for connections on port 5900
> > system.terminal: Listening for connections on port 3456
> > system.realview.uart1.device: Listening for connections on port 3457
> > system.realview.uart2.device: Listening for connections on port 3458
> > system.realview.uart3.device: Listening for connections on port 3459
> > 0: system.remote_gdb: listening for remote gdb on port 7000
> > warn: CoherentXBar system.membus has no snooping ports attached!
> > info: Using bootloader at address 0x10
> > info: Using kernel entry physical address at 0x80080000
> > info: Loading DTB file: m5out/system.dtb at address 0x88000000
> > **** REAL SIMULATION ****
> > info: KVM: Coalesced MMIO disabled by config.
> > warn: Existing EnergyCtrl, but no enabled DVFSHandler found.
> > info: Entering event queue @ 0. Starting simulation...
> > warn: Returning zero for read from miscreg pmintenset_el1
> > warn: Returning zero for read from miscreg pmintenclr_el1
> > warn: Returning zero for read from miscreg pmcr_el0
> > warn: Returning zero for read from miscreg pmcntenset_el0
> > warn: Returning zero for read from miscreg pmcntenclr_el0
> > warn: Returning zero for read from miscreg pmovsclr_el0
> > warn: Returning zero for read from miscreg pmswinc_el0
> > warn: Returning zero for read from miscreg pmselr_el0
> > warn: Returning zero for read from miscreg pmccntr_el0
> > warn: Returning zero for read from miscreg pmuserenr_el0
> > warn: Returning zero for read from miscreg pmovsset_el0
> > warn: Returning zero for read from miscreg pmevcntr0_el0
> > warn: Returning zero for read from miscreg pmevcntr1_el0
> > warn: Returning zero for read from miscreg pmevcntr2_el0
> > warn: Returning zero for read from miscreg pmevcntr3_el0
> > warn: Returning zero for read from miscreg pmevcntr4_el0
> > warn: Returning zero for read from miscreg pmevcntr5_el0
> > warn: Returning zero for read from miscreg pmevtyper0_el0
> > warn: Returning zero for read from miscreg pmevtyper1_el0
> > warn: Returning zero for read from miscreg pmevtyper2_el0
> > warn: Returning zero for read from miscreg pmevtyper3_el0
> > warn: Returning zero for read from miscreg pmevtyper4_el0
> > warn: Returning zero for read from miscreg pmevtyper5_el0
> > warn: Returning zero for read from miscreg pmccfiltr_el0
> > warn: SCReg: Access to unknown device dcc0:site0:pos0:fn7:dev0
> > 1152383696405000: system.terminal: attach terminal 0
> >
> >
> > command line: ./build/ARM/gem5.opt configs/example.fs.py
> > --cpu-type=ArmV8KvmCPU--
> kernel=/home/tracy/gem5/fs_image_arm/binaries/
> > vmlinux.vexpress_gem5_v1_64.20170616
> > --disk=/home/tracy/gem5/fs_image_arm/disks/linaro-minimal-aarch64.img
> >
> >
> > Host CPU Architecture: ARMV8
> >
> > Host OS: ubuntu 18.04.4
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