> >> not too sure how much impact inlined lookup has on the performance.
> >> since i disabled it, next step i would just get rid of that piece of
> >> generated assembly, as it is no good for icache ( generated for every
> >> memory operation).
> >
> > You can run a benchmark inside your guest.
On Thu, Aug 23, 2012 at 9:06 PM, 陳韋任 (Wei-Ren Chen)
wrote:
>> That might be difficult. what i did was that i disabled inlined
>> translated and push the virt/phys address into 2 new fields in the cpu
>> structure in the call out lookup. because in the callout lookup we
>> have a handle to the cpu
> That might be difficult. what i did was that i disabled inlined
> translated and push the virt/phys address into 2 new fields in the cpu
> structure in the call out lookup. because in the callout lookup we
> have a handle to the cpu env.
What you mean by "disabled inlined translated"? You mean
On Thu, Aug 23, 2012 at 7:57 PM, 陳韋任 (Wei-Ren Chen)
wrote:
>> even that. is it possible to pass host virtual out. the fast path add
>> the addend to get host virtual ? so it must be in a register, most
>> likely eax in i386. what do you think would be the best way to get
>> that out ?
>
> Take a
> even that. is it possible to pass host virtual out. the fast path add
> the addend to get host virtual ? so it must be in a register, most
> likely eax in i386. what do you think would be the best way to get
> that out ?
Take a look on comment on tcg_out_tlb_load (tcg/i386/tcg-target.c).
F
Hi, Xin,
Try Max's patch
http://lists.gnu.org/archive/html/qemu-devel/2012-08/msg03226.html
I used it to get all the guest virtual address because this patch
disable the fast mmu path.
Steven
On Thu, Aug 23, 2012 at 12:18 PM, Xin Tong wrote:
> On Thu, Aug 23, 2012 at 8:52 AM, Peter Maydell
>
On Thu, Aug 23, 2012 at 8:52 AM, Peter Maydell wrote:
> On 23 August 2012 16:34, Xin Tong wrote:
>> I am emulating arm on x86. i want to track the virt and physical
>> address of last memory operation. so i put 2 fields in the CPUState
>> and make tcg_global_mem_new_i32 on them Therefore, before
On 23 August 2012 16:34, Xin Tong wrote:
> I am emulating arm on x86. i want to track the virt and physical
> address of last memory operation. so i put 2 fields in the CPUState
> and make tcg_global_mem_new_i32 on them Therefore, before every
> translation i generate code to save the virtual addr
I am emulating arm on x86. i want to track the virt and physical
address of last memory operation. so i put 2 fields in the CPUState
and make tcg_global_mem_new_i32 on them Therefore, before every
translation i generate code to save the virtual address as follow:
static inline void gen_st32(TCGv v
> subtracting host virtual with a fixed offset for ram. but the thing i
> do not know how to do is how to pass the guest physical back, can i
> store the guest physical in the TCGv from the guest virtual.
Maybe you can store it on a host unused register, perhaps xmm0? ;)
Regards,
chenwj
--
We
On Wed, Aug 22, 2012 at 09:38:17PM -0700, Xin Tong wrote:
> On Wed, Aug 22, 2012 at 8:14 PM, 陳韋任 (Wei-Ren Chen)
> wrote:
> >> In tcg_gen_qemu_ld8s(tmp, addr, index); a TCGv addr is passed to the
> >> INDEX_op_qemu_ld8s as param and the loaded value is passed back in
> >> tmp. i want to get the tra
On Wed, Aug 22, 2012 at 8:14 PM, 陳韋任 (Wei-Ren Chen)
wrote:
>> In tcg_gen_qemu_ld8s(tmp, addr, index); a TCGv addr is passed to the
>> INDEX_op_qemu_ld8s as param and the loaded value is passed back in
>> tmp. i want to get the translated value as well. how can i do that ?
>
> IIUC, qemu_ld take
> In tcg_gen_qemu_ld8s(tmp, addr, index); a TCGv addr is passed to the
> INDEX_op_qemu_ld8s as param and the loaded value is passed back in
> tmp. i want to get the translated value as well. how can i do that ?
IIUC, qemu_ld takes addr as guest virtual address, then loads the
value in that addr
Hello
In tcg_gen_qemu_ld8s(tmp, addr, index); a TCGv addr is passed to the
INDEX_op_qemu_ld8s as param and the loaded value is passed back in
tmp. i want to get the translated value as well. how can i do that ?
one way i can think of right now is to modify the INDEX_op_qemu_ld8s
and make it take
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