Nitin A Kamble wrote:
> Hi Avi,
> I have been collected quiet a few patches in my tree now. They are
> all in dirty(style, debug) state. Now I started cleaning some of the
> code in my tree, and cutting patches again. I plan to send you steady
> stream of patches now. so you can expect lots of patches coming from
> me in coming days now.
>
> About the status of the big real mode; In my private tree I have
> evolved the segment registers support for the emulator to next level
> now. I think I can also cut that patch also and send it to you. now it
> is much more complete than earlier. As of today the SuSe Linux 10.1 is
> proceeding in the big-real mode into the int 10 call. that is with the
> help emulation of about 20 new instructions, and also the
> infrastructure support for those instructions. Probably I should keep
> a count of instructions emulated in the big real mode to gauge my
> progress.
>
> I am cutting my tree into simple patches, so it will be easy for you
> to understand and apply/comment.
>
> diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
> index f7ff231..4a213e2 100644
> --- a/drivers/kvm/kvm_main.c
> +++ b/drivers/kvm/kvm_main.c
> @@ -962,8 +962,35 @@ static int emulator_write_std(unsigned long addr,
> unsigned int bytes,
> struct kvm_vcpu *vcpu)
> {
> - pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
> - return X86EMUL_UNHANDLEABLE;
> + void *data = (void *) val;
> +
> + while (bytes) {
> + gpa_t gpa;
> + unsigned offset = addr & (PAGE_SIZE-1);
> + unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
> + unsigned long pfn;
> + struct page *page;
> + void *page_virt;
> +
> + gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
> + if (gpa == UNMAPPED_GVA)
> + return X86EMUL_PROPAGATE_FAULT;
> + pfn = gpa >> PAGE_SHIFT;
> + page = gfn_to_page(vcpu->kvm, pfn);
> + if (!page)
> + return X86EMUL_UNHANDLEABLE;
> + page_virt = kmap_atomic(page, KM_USER0);
> +
> + memcpy(page_virt + offset, data, tocopy);
> +
> + kunmap_atomic(page_virt, KM_USER0);
> +
> + bytes -= tocopy;
> + data += tocopy;
> + addr += tocopy;
> + }
> +
> + return X86EMUL_CONTINUE;
> }
>
This doesn't do the right thing if the write is targeted at a page
table. Just use emulator_write_emulated.
--
error compiling committee.c: too many arguments to function
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