Which kernel did you use? The gem5 official pre-compiled or your customized? I
have tried the official one, it just work fine.Perhaps some of network-related
components/driver were built as module in your kernel? Check your kernel config
file and make sure none of them are built as module.
Jiuyue Ma
Date: Fri, 13 Jun 2014 10:42:35 -0400
Subject: Re: [gem5-users] how to enable Ethernet device for x86 full system
From: veyda...@gmail.com
To: forever...@hotmail.com; gem5-users@gem5.org
Hi, Jiuyue,
Thanks again for the help. When I executed "ifconfig", it still has errors like
modprobe: FATAL: Could not load /lib/modules/2.6.28.4/modules.dep: No such file
or directory
I searched for a while, this error typically is because the kernel can't find
the ethernet device. But from the kernel boot log, It seems the kernel already
initialized the ethernet device correctly.
e1000 0000:00:02.0: enabling device (0000 -> 0002)
e1000: 0000:00:02.0: e1000_probe: (PCI:33MHz:32-bit) 00:90:00:00:00:01
e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
Have you encountered similar problem before? Thanks.
On Fri, Jun 13, 2014 at 4:41 AM, 马久跃 via gem5-users <gem5-users@gem5.org> wrote:
Sorry for the mistake in previous reply.
The reason of invalid address error in 2.6.28.4 kernel was CPUID
LongModeAddressSize(eax:0x80000008) not implement in gem5.
linux-2.8.28.4/arch/x86/mm/ioremap.c
27 static inline int phys_addr_valid(unsigned long addr)
28 { 29 return addr < (1UL << boot_cpu_data.x86_phys_bits); 30 }...191
static void __iomem *__ioremap_caller(resource_size_t phys_addr,192
unsigned long size, unsigned long prot_val, void *caller)
...209 if (!phys_addr_valid(phys_addr)) { <-
ioremap invalid address error here
210 printk(KERN_WARNING "ioremap: invalid physical address
%llx\n",211 (unsigned long long)phys_addr);212
WARN_ON_ONCE(1);
213 return NULL;214 }
linux-2.6.28.4/arch/x86/kernel/cpu/common.c
475 #ifdef CONFIG_X86_64476 if (c->extended_cpuid_level >= 0x80000008) {
477 u32 eax = cpuid_eax(0x80000008);478 479
c->x86_virt_bits = (eax >> 8) & 0xff;480 c->x86_phys_bits = eax
& 0xff; <- x86_phys_bits initialized here, using CPUID
LongModeAddressSize
481 }482 #endif
The attached two patch should fix this problem, one for LongModeAddressSize,
and the other for x86-ethernet config.cpuid patch return 0x0000ffff for
LongModeAddressSize, I'm not sure whether it was right, but it works for me.
Jiuyue Ma
To: gem5-users@gem5.org
Date: Fri, 13 Jun 2014 08:33:29 +0800
Subject: Re: [gem5-users] how to enable Ethernet device for x86 full system
From: gem5-users@gem5.org
Try to connect "x86_sys.membus.default" port to "x86_sys.bridge.slave" instead
of badaddr_responder (configs/common/FSConfig.py:53-55,334-340), this should
solve the invalid address error.
You may also need change ethernet device's default InterruptLine (0x1e) to a
smaller value (e.g. less than 0x10), otherwise X86 I/O APIC may not work
properly.
Jiuyue Ma
Date: Thu, 12 Jun 2014 08:00:34 -0700
To: veyda...@gmail.com; gem5-users@gem5.org
Subject: Re: [gem5-users] how to enable Ethernet device for x86 full system
From: gem5-users@gem5.org
I encountered the same issue. I think this should be a supported feature.
-Pete
On Thu, Jun 12, 2014 at 6:55 AM, Veydan Wu via gem5-users <gem5-users@gem5.org>
wrote:
HI, All,
I want to enable an Ethernet device to x86 full system simulation. After
searching the mail archive, I followed the ARM way, added the device in
dev/x86/Pc.py just like Arm Realview, and added code to attachIO(). The
config.ini file showed the device is there and connected on iobus.
But when booting the kernel (2.6.28.4) using atomic CPU, there was a ioremap
invalid address error. And after boot, the system can't see the device
(ifconfig eth0 shows nothing).
Has anyone successfully made this work? I am not familiar with the x86 IO
configuration. Any hints would be really helpful. Thanks a lot.
--
Regards,
Veydan
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--
Regards,
Veydan
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