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RE: [Xen-devel] Vt-d not working with 3.4.1

To: <enming.teo@xxxxxxxxxxxxxxx>, <mad@xxxxxx>
Subject: RE: [Xen-devel] Vt-d not working with 3.4.1
From: "Teo En Ming (Zhang Enming)" <enming.teo@xxxxxxxxxxxxxxx>
Date: Thu, 20 Aug 2009 21:09:32 +0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, weidong.han@xxxxxxxxx, "'Bonenkamp, Ralf'" <ralf.bonenkamp@xxxxxxxx>
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<QUOTE drivesoslow>

I was able to get it to compile and install no problem finally, but it locks
up when I startx. I can compile it for non-XEN 64bit no problem. The non-XEN
kernel is significantly newer (2.6.23 vs 2.6.21)

</QUOTE>

Link: http://www.nvnews.net/vbulletin/showthread.php?t=106395

Same problem as what I am getting.

I am using the NVidia Geforce 8 series drivers for 64-bit.

Regards,
 
Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics Engineering)
BEng(Hons)(Mechanical Engineering) 
Technical Support Engineer 
Information Technology Department
Asiasoft Online Pte Ltd
Tampines Central 1 #04-01 Tampines Plaza 
Singapore 529541
Republic of Singapore
Mobile: +65-9648-9798
MSN: teoenming@xxxxxxxxxxx

-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Teo En Ming
(Zhang Enming)
Sent: Thursday, August 20, 2009 8:52 PM
To: enming.teo@xxxxxxxxxxxxxxx; mad@xxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; weidong.han@xxxxxxxxx; 'Bonenkamp,Ralf'
Subject: RE: [Xen-devel] Vt-d not working with 3.4.1

<QUOTE monz at nV News Forums>

The problem with video on Xen is that the driver needs to be Xen-aware.

</QUOTE>

Link: http://www.nvnews.net/vbulletin/showthread.php?t=60125

Regards,
 
Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics Engineering)
BEng(Hons)(Mechanical Engineering) 
Technical Support Engineer 
Information Technology Department
Asiasoft Online Pte Ltd
Tampines Central 1 #04-01 Tampines Plaza 
Singapore 529541
Republic of Singapore
Mobile: +65-9648-9798
MSN: teoenming@xxxxxxxxxxx
-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Teo En Ming
(Zhang Enming)
Sent: Thursday, August 20, 2009 8:49 PM
To: enming.teo@xxxxxxxxxxxxxxx; mad@xxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; weidong.han@xxxxxxxxx; 'Bonenkamp,Ralf'
Subject: RE: [Xen-devel] Vt-d not working with 3.4.1

Will the Xen patch for NVIDIA graphics drivers mentioned in the below
opensuse.org link work with Xen 3.4.1 rc and Jeremy's pv-ops dom 0 kernel
2.6.30-rc3 or 2.6.31-rc6 under Fedora 11 64-bit? Please see the patch code
below.

<CODE>

diff -urN nv-1.0-9625/nv.c nv-1.0-9625-xenrt/nv.c
--- nv-1.0-9625/nv.c    2006-09-26 21:33:35.000000000 +0200
+++ nv-1.0-9625-xenrt/nv.c      2006-10-03 01:15:42.000000000 +0200
@@ -42,8 +42,26 @@
 
 int nv_pat_enabled = 0;
 
+/*
+ * disable PAT support if XEN or PREEMPT_RT is configured in kernel
+ */
+
+#if defined(CONFIG_XEN) || defined(CONFIG_PREEMPT_RT)
+static int nv_disable_pat = 1;
+#else
 static int nv_disable_pat = 0;
+#endif
+
+/*
+ * you can re-enable PAT support for PREEMPT_RT when applying
+ * "nv_disable_pat=0" as kernel parameter for the sake of slightly
+ * better 3D performance but at the expense of higher latencies.
+ * if XEN is configured, then PAT support can't be enabled!
+ */
+
+#if !defined(CONFIG_XEN)
 NV_MODULE_PARAMETER(nv_disable_pat);
+#endif
 
 #if defined(NVCPU_X86) || defined(NVCPU_X86_64)
 NvU64 __nv_supported_pte_mask = ~_PAGE_NX;
diff -urN nv-1.0-9625/nv-linux.h nv-1.0-9625-xenrt/nv-linux.h
--- nv-1.0-9625/nv-linux.h      2006-09-26 21:33:37.000000000 +0200
+++ nv-1.0-9625-xenrt/nv-linux.h        2006-10-03 01:15:42.000000000 +0200
@@ -226,7 +226,7 @@
  * tiny, and the kernel panics when it is exhausted. try to warn the user
that
  * they need to boost the size of their pool.
  */
-#if defined(CONFIG_SWIOTLB) && !defined(GFP_DMA32)
+#if defined(CONFIG_SWIOTLB) && !defined(GFP_DMA32) && !defined(CONFIG_XEN)
 #define NV_SWIOTLB 1
 #endif
 
@@ -734,7 +734,10 @@
 #define NV_VM_INSERT_PAGE(vma, addr, page) \
     vm_insert_page(vma, addr, page)
 #endif
-#if defined(NV_REMAP_PFN_RANGE_PRESENT)
+#if defined(CONFIG_XEN)
+#define NV_REMAP_PAGE_RANGE(from, offset, x...) \
+    io_remap_pfn_range(vma, from, ((offset) >> PAGE_SHIFT), x)
+#elif defined(NV_REMAP_PFN_RANGE_PRESENT)
 #define NV_REMAP_PAGE_RANGE(from, offset, x...) \
     remap_pfn_range(vma, from, ((offset) >> PAGE_SHIFT), x)
 #elif defined(NV_REMAP_PAGE_RANGE_5_PRESENT)
@@ -746,6 +749,9 @@
 #define NV_REMAP_PAGE_RANGE(x...) remap_page_range(x)
 #endif
 
+#if !defined(CONFIG_XEN)
+#define phys_to_machine(x) x
+#endif
 
 #define NV_PGD_OFFSET(address, kernel, mm)              \
    ({                                                   \
diff -urN nv-1.0-9625/nv-vm.c nv-1.0-9625-xenrt/nv-vm.c
--- nv-1.0-9625/nv-vm.c 2006-09-26 21:33:37.000000000 +0200
+++ nv-1.0-9625-xenrt/nv-vm.c   2006-10-03 01:24:31.000000000 +0200
@@ -352,6 +352,9 @@
 
 static void nv_flush_caches(void)
 {
+#if defined(CONFIG_PREEMPT_RT)
+    if(!nv_pat_enabled) return;
+#endif
 #if defined(KERNEL_2_4)
     // for 2.4 kernels, just automatically flush the caches and invalidate
tlbs
 #ifdef CONFIG_SMP
@@ -508,7 +511,7 @@
         page_ptr->phys_addr = phys_addr;
         page_ptr->page_count = NV_GET_PAGE_COUNT(page_ptr);
         page_ptr->virt_addr = virt_addr;
-        page_ptr->dma_addr = page_ptr->phys_addr;
+        page_ptr->dma_addr = phys_to_machine(page_ptr->phys_addr);
 
         /* lock the page for dma purposes */
         nv_lock_page(page_ptr);
diff -urN nv-1.0-9625/os-agp.c nv-1.0-9625-xenrt/os-agp.c
--- nv-1.0-9625/os-agp.c        2006-09-26 21:33:37.000000000 +0200
+++ nv-1.0-9625-xenrt/os-agp.c  2006-10-03 01:15:42.000000000 +0200
@@ -286,7 +286,7 @@
 
          page_ptr->phys_addr = (ptr->memory[i] & PAGE_MASK);
          page_ptr->virt_addr = (unsigned long) __va(page_ptr->phys_addr);
-         page_ptr->dma_addr  = page_ptr->phys_addr;
+         page_ptr->dma_addr  = phys_to_machine(page_ptr->phys_addr);
     }
 
     return RM_OK;
diff -urN nv-1.0-9625/os-interface.c nv-1.0-9625-xenrt/os-interface.c
--- nv-1.0-9625/os-interface.c  2006-09-26 21:33:37.000000000 +0200
+++ nv-1.0-9625-xenrt/os-interface.c    2006-10-03 01:15:42.000000000 +0200
@@ -527,6 +527,7 @@
     MicroSeconds = MilliSeconds * 1000;
     tm_end.tv_usec = MicroSeconds;
     tm_end.tv_sec = 0;
+#if !defined(CONFIG_XEN)
     NV_TIMERADD(&tm_aux, &tm_end, &tm_end);
 
     /* do we have a full jiffie to wait? */
@@ -564,6 +565,7 @@
                 MicroSeconds = 0;
         } while ((jiffies = NV_USECS_TO_JIFFIES(MicroSeconds)) != 0);
     }
+#endif
 
     if (MicroSeconds > 1000)
     {

</CODE>

Regards,
 
Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics Engineering)
BEng(Hons)(Mechanical Engineering) 
Technical Support Engineer 
Information Technology Department
Asiasoft Online Pte Ltd
Tampines Central 1 #04-01 Tampines Plaza 
Singapore 529541
Republic of Singapore
Mobile: +65-9648-9798
MSN: teoenming@xxxxxxxxxxx

-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Teo En Ming
(Zhang Enming)
Sent: Thursday, August 20, 2009 8:37 PM
To: enming.teo@xxxxxxxxxxxxxxx; mad@xxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; weidong.han@xxxxxxxxx; 'Bonenkamp,Ralf'
Subject: RE: [Xen-devel] Vt-d not working with 3.4.1

No wonder compiling official NVidia drivers against the Xen domain 0
paravirt operations kernel doesn't work. It causes my X server to show a
blank screen and freeze. NVidia drivers need to be patched for it to work
with Xen kernels.

http://en.opensuse.org/Use_Nvidia_driver_with_Xen

May I know where I can get the patch?

Regards,
 
Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics Engineering)
BEng(Hons)(Mechanical Engineering) 
Technical Support Engineer 
Information Technology Department
Asiasoft Online Pte Ltd
Tampines Central 1 #04-01 Tampines Plaza 
Singapore 529541
Republic of Singapore
Mobile: +65-9648-9798
MSN: teoenming@xxxxxxxxxxx
-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Mr. Teo En Ming
(Zhang Enming)
Sent: Thursday, August 20, 2009 1:06 AM
To: mad@xxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; weidong.han@xxxxxxxxx; 'Bonenkamp,Ralf'
Subject: Re: [Xen-devel] Vt-d not working with 3.4.1

Dear All,

I can confirm that recompiling the Xen dom 0 paravirt-ops kernel using 
gzip compression works. I can use the generated bzImage to boot up Domain 0.

If you attempt to compile the Xen Dom 0 pv-ops kernel using bzip2 
compression, you won't be able to boot up Domain 0 using the generated 
bzImage. You will get an ELF error and kernel panic on CPU 0.

As for X server, I haven't got much luck yet.

I was able to download and compile NVIDIA's kernel module directly from 
official NVIDIA website for Fedora 11 Default shipping kernel. I was 
able to start X server successfully and launch a desktop environment 
using nvidia.ko.

However, if I want to compile the nvidia kernel module against Xen dom 0 
pv_ops kernel sources, the kernel module compiles successfully, but when 
I start X, the screen becomes blank and the whole system freezes there.

-- 
Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics Engineering)
BEng(Hons)(Mechanical Engineering)
Technical Support Engineer
Information Technology Department
Asiasoft Online Pte Ltd
Tampines Central 1 #04-01 Tampines Plaza
Singapore 529541
Republic of Singapore
Mobile: +65-9648-9798
MSN: teoenming@xxxxxxxxxxx
Alma Maters: Singapore Polytechnic, National University of Singapore



On 08/19/2009 09:06 PM, Marc - A. Dahlhaus wrote:
> Mr. Teo En Ming (Zhang Enming) schrieb:
>> Dear Marc,
>>
>> I am aware that bzImage is not related to bzip2 compression at all. 
>> In fact bzImage stands for big zImage.
>>
>> http://en.wikipedia.org/wiki/Vmlinux
>>
>> In the past, I was able to use bzip2 for Xen kernel in OpenSUSE 11.1 
>> successfully. Why is it I am only able to use gzip now?
>>
> The dom0 builder only supports that as far as i know.
>
> Marc




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