On Mon, 28 Mar 2022 at 13:17, wrote:
>
> thanks for you explain, I will learn it later.
>
>
> in the scenario of rom bar size 8k, page size 64k, the value of
>
> 'size = ROUND_UP(size, qemu_real_host_page_size)' is 64k, kvm_align_section
>
> also return 64k bytes. just the same size as the size o
} - qdev->ram_header = ioremap(qdev->vram_base ++ qdev->ram_header = ioremap_wc(qdev->vram_base + qdev->rom->ram_header_offset, sizeof(*qdev->ram_header)); if (!qdev->ram_header) {Regards,Cong.
主 题：Re: [PATC
On Mon, 28 Mar 2022 at 10:42, Cong Liu wrote:
> On 2022/3/25 23:00, Peter Maydell wrote:
> > This is correct behaviour. If the memory region is less than
> > a complete host page then it is not possible for KVM to
> > map it into the guest as directly accessible memory,
> > because that can only b
On 2022/3/25 23:00, Peter Maydell wrote:
On Fri, 25 Mar 2022 at 14:42, wrote:
I found this issue on qmeu 4.2 with host linux 4.19, I want to
use qxl on arm64. on arm64, default page size is 64k, and the
qxl_rom_size is fixed 8192.
OK, so the fix to this is "use a newer QEMU".
but when I
On Fri, 25 Mar 2022 at 14:42, wrote:
> I found this issue on qmeu 4.2 with host linux 4.19, I want to
> use qxl on arm64. on arm64, default page size is 64k, and the
> qxl_rom_size is fixed 8192.
OK, so the fix to this is "use a newer QEMU".
> but when I read qxl_rom region in guest, guest os st
ppear. but when others create a memory region with the size less than onepage. when it run into kvm_align_section, it return 0again.RegardsCong.
主 题：Re: [PATCH] kvm/arm64: Fix memory section did not set to kvm
日 期：2022-03-25 21:12
发件人：Peter Maydell
On Fri, 18 Mar 2022 at 14:24, Cong Liu wrote:
>
> on the arm64 platform, the PAGESIZE is 64k, the default qxl rom
> bar size is 8k(QXL_ROM_SZ), in the case memory size less than
> one page size, kvm_align_section return zero, the memory section
> did not commit kvm.
Can you give more details on
on the arm64 platform, the PAGESIZE is 64k, the default qxl rom
bar size is 8k(QXL_ROM_SZ), in the case memory size less than
one page size, kvm_align_section return zero, the memory section
did not commit kvm.
Signed-off-by: Cong Liu
---
accel/kvm/kvm-all.c | 1 +
1 file changed, 1 insertion(+
