On 6/29/07, Fabrice Bellard <[EMAIL PROTECTED]> wrote:
The kqemu part could be quite simple. A new execution mode could be
added so that:
- shadow page table faults generate a specific signal in the user guest
code.
- A kqemu "syscall" callable from the user guest code could be used to
do the eq
> > I'd expect the overhead of SIGSEGV+mmap to be prohibitive. I don't have
> > numbers to back this up, but experience with MIPS system emulation shows
> > that TLB miss cost can have significant effect on overall performance.
>
> I'd say this can't be worse than on MacOS X where Mach exception
>
Blue Swirl wrote:
On 6/29/07, Fabrice Bellard <[EMAIL PROTECTED]> wrote:
In fact, running in 64 bit is not necessary : It is simpler and more
efficient to use kqemu (or KVM) to handle the address space remapping.
The trick is to run the translator in the upper part or lower part of
the 32 bit ad
Hi,
2007/6/29, Paul Brook <[EMAIL PROTECTED]>:
I'd expect the overhead of SIGSEGV+mmap to be prohibitive. I don't have
numbers to back this up, but experience with MIPS system emulation shows that
TLB miss cost can have significant effect on overall performance.
I'd say this can't be worse tha
On 6/29/07, Fabrice Bellard <[EMAIL PROTECTED]> wrote:
In fact, running in 64 bit is not necessary : It is simpler and more
efficient to use kqemu (or KVM) to handle the address space remapping.
The trick is to run the translator in the upper part or lower part of
the 32 bit address space and to
> I had an idea of mapping the full 32-bit target virtual address space
> to a 4GB area on 64-bit hosts. Then the loads and stores to normal RAM
> (except page tables, code_mem_write etc) could be made much faster,
> falling back to softmmu for other pages. The idea has come up before,
> for exampl
Hi,
In fact, running in 64 bit is not necessary : It is simpler and more
efficient to use kqemu (or KVM) to handle the address space remapping.
The trick is to run the translator in the upper part or lower part of
the 32 bit address space and to protect it with segments.
Even in 64 bit mode,
Hi,
I had an idea of mapping the full 32-bit target virtual address space
to a 4GB area on 64-bit hosts. Then the loads and stores to normal RAM
(except page tables, code_mem_write etc) could be made much faster,
falling back to softmmu for other pages. The idea has come up before,
for example in
