On 2023/3/22 14:40, Wu, Fei wrote:
On 3/22/2023 11:36 AM, Wu, Fei wrote:
On 3/22/2023 11:31 AM, Richard Henderson wrote:
On 3/21/23 19:47, Wu, Fei wrote:
You should be making use of different softmmu indexes, similar to how
ARM uses a separate index for PAN (privileged access never) mode. I
On 3/22/2023 11:36 AM, Wu, Fei wrote:
> On 3/22/2023 11:31 AM, Richard Henderson wrote:
>> On 3/21/23 19:47, Wu, Fei wrote:
> You should be making use of different softmmu indexes, similar to how
> ARM uses a separate index for PAN (privileged access never) mode. If
> I read the manual
On 3/22/2023 11:31 AM, Richard Henderson wrote:
> On 3/21/23 19:47, Wu, Fei wrote:
You should be making use of different softmmu indexes, similar to how
ARM uses a separate index for PAN (privileged access never) mode. If
I read the manual properly, PAN == !SUM.
When you d
On 3/21/23 19:47, Wu, Fei wrote:
You should be making use of different softmmu indexes, similar to how
ARM uses a separate index for PAN (privileged access never) mode. If
I read the manual properly, PAN == !SUM.
When you do this, you need no additional flushing.
Hi Fei,
Let's follow Richard
On 2023/3/22 10:47, Wu, Fei wrote:
On 3/22/2023 9:58 AM, LIU Zhiwei wrote:
On 2023/3/22 0:10, Richard Henderson wrote:
On 3/20/23 23:37, fei2...@intel.com wrote:
From: Fei Wu
Kernel needs to access user mode memory e.g. during syscalls, the window
is usually opened up for a very limited ti
On 3/22/2023 9:58 AM, LIU Zhiwei wrote:
>
> On 2023/3/22 0:10, Richard Henderson wrote:
>> On 3/20/23 23:37, fei2...@intel.com wrote:
>>> From: Fei Wu
>>>
>>> Kernel needs to access user mode memory e.g. during syscalls, the window
>>> is usually opened up for a very limited time through MSTATUS.
On 2023/3/22 0:10, Richard Henderson wrote:
On 3/20/23 23:37, fei2...@intel.com wrote:
From: Fei Wu
Kernel needs to access user mode memory e.g. during syscalls, the window
is usually opened up for a very limited time through MSTATUS.SUM, the
overhead is too much if tlb_flush() gets called f
On 3/20/23 23:37, fei2...@intel.com wrote:
From: Fei Wu
Kernel needs to access user mode memory e.g. during syscalls, the window
is usually opened up for a very limited time through MSTATUS.SUM, the
overhead is too much if tlb_flush() gets called for every SUM change.
This patch saves addresses
On 2023/3/21 21:22, Wu, Fei wrote:
On 3/21/2023 8:58 PM, liweiwei wrote:
On 2023/3/21 14:37, fei2...@intel.com wrote:
From: Fei Wu
Kernel needs to access user mode memory e.g. during syscalls, the window
is usually opened up for a very limited time through MSTATUS.SUM, the
overhead is too m
On 3/21/2023 8:58 PM, liweiwei wrote:
>
> On 2023/3/21 14:37, fei2...@intel.com wrote:
>> From: Fei Wu
>>
>> Kernel needs to access user mode memory e.g. during syscalls, the window
>> is usually opened up for a very limited time through MSTATUS.SUM, the
>> overhead is too much if tlb_flush() get
On 2023/3/21 14:37, fei2...@intel.com wrote:
From: Fei Wu
Kernel needs to access user mode memory e.g. during syscalls, the window
is usually opened up for a very limited time through MSTATUS.SUM, the
overhead is too much if tlb_flush() gets called for every SUM change.
This patch saves addre
On 2023/3/21 20:00, Wu, Fei wrote:
On 3/21/2023 5:47 PM, liweiwei wrote:
On 2023/3/21 17:14, Wu, Fei wrote:
On 3/21/2023 4:50 PM, liweiwei wrote:
On 2023/3/21 16:40, Wu, Fei wrote:
On 3/21/2023 4:28 PM, liweiwei wrote:
On 2023/3/21 14:37,fei2...@intel.com wrote:
From: Fei Wu
Kernel needs
On 3/21/2023 5:47 PM, liweiwei wrote:
>
> On 2023/3/21 17:14, Wu, Fei wrote:
>> On 3/21/2023 4:50 PM, liweiwei wrote:
>>> On 2023/3/21 16:40, Wu, Fei wrote:
On 3/21/2023 4:28 PM, liweiwei wrote:
> On 2023/3/21 14:37, fei2...@intel.com wrote:
>> From: Fei Wu
>>
>> Kernel needs
On 2023/3/21 17:14, Wu, Fei wrote:
On 3/21/2023 4:50 PM, liweiwei wrote:
On 2023/3/21 16:40, Wu, Fei wrote:
On 3/21/2023 4:28 PM, liweiwei wrote:
On 2023/3/21 14:37, fei2...@intel.com wrote:
From: Fei Wu
Kernel needs to access user mode memory e.g. during syscalls, the
window
is usually o
On 3/21/2023 4:50 PM, liweiwei wrote:
>
> On 2023/3/21 16:40, Wu, Fei wrote:
>> On 3/21/2023 4:28 PM, liweiwei wrote:
>>> On 2023/3/21 14:37, fei2...@intel.com wrote:
From: Fei Wu
Kernel needs to access user mode memory e.g. during syscalls, the
window
is usually opened u
On 2023/3/21 16:40, Wu, Fei wrote:
On 3/21/2023 4:28 PM, liweiwei wrote:
On 2023/3/21 14:37, fei2...@intel.com wrote:
From: Fei Wu
Kernel needs to access user mode memory e.g. during syscalls, the window
is usually opened up for a very limited time through MSTATUS.SUM, the
overhead is too m
On 3/21/2023 4:28 PM, liweiwei wrote:
>
> On 2023/3/21 14:37, fei2...@intel.com wrote:
>> From: Fei Wu
>>
>> Kernel needs to access user mode memory e.g. during syscalls, the window
>> is usually opened up for a very limited time through MSTATUS.SUM, the
>> overhead is too much if tlb_flush() get
On 2023/3/21 14:37, fei2...@intel.com wrote:
From: Fei Wu
Kernel needs to access user mode memory e.g. during syscalls, the window
is usually opened up for a very limited time through MSTATUS.SUM, the
overhead is too much if tlb_flush() gets called for every SUM change.
This patch saves addre
From: Fei Wu
Kernel needs to access user mode memory e.g. during syscalls, the window
is usually opened up for a very limited time through MSTATUS.SUM, the
overhead is too much if tlb_flush() gets called for every SUM change.
This patch saves addresses accessed when SUM=1, and flushs only these
p
19 matches
Mail list logo
