Re: [Qemu-devel] [PATCH] ARM: Virt: Don't generate RTC ACPI node when using UEFI

2016-01-13 Thread Laszlo Ersek
On 01/12/16 16:24, Shannon Zhao wrote: > When booting VM through UEFI, UEFI takes ownership of the RTC hardware. > To DTB UEFI could call libfdt api to disable the RTC device node, but to > ACPI it couldn't do that. Therefore, we don't generate the RTC ACPI > device in QEMU when using UEFI. > >

Re: [Qemu-devel] [PATCH] ARM: Virt: Don't generate RTC ACPI node when using UEFI

2016-01-13 Thread Laszlo Ersek
On 01/12/16 16:30, Peter Maydell wrote: > On 12 January 2016 at 15:24, Shannon Zhao wrote: >> When booting VM through UEFI, UEFI takes ownership of the RTC hardware. >> To DTB UEFI could call libfdt api to disable the RTC device node, but to >> ACPI it couldn't do that.

Re: [Qemu-devel] [PATCH] ARM: Virt: Don't generate RTC ACPI node when using UEFI

2016-01-13 Thread Ard Biesheuvel
On 13 January 2016 at 11:18, Laszlo Ersek wrote: > On 01/12/16 16:24, Shannon Zhao wrote: >> When booting VM through UEFI, UEFI takes ownership of the RTC hardware. >> To DTB UEFI could call libfdt api to disable the RTC device node, but to >> ACPI it couldn't do that.

Re: [Qemu-devel] [PATCH] ARM: Virt: Don't generate RTC ACPI node when using UEFI

2016-01-13 Thread Laszlo Ersek
On 01/13/16 11:20, Ard Biesheuvel wrote: > On 13 January 2016 at 11:18, Laszlo Ersek wrote: >> On 01/12/16 16:24, Shannon Zhao wrote: >>> When booting VM through UEFI, UEFI takes ownership of the RTC hardware. >>> To DTB UEFI could call libfdt api to disable the RTC device

Re: [Qemu-devel] [PATCH] ARM: Virt: Don't generate RTC ACPI node when using UEFI

2016-01-13 Thread Peter Maydell
On 13 January 2016 at 10:48, Laszlo Ersek wrote: > On 01/13/16 11:20, Ard Biesheuvel wrote: >> I am not buying it either, to be honest. In fact, I think it is >> another reason why we should mandate UEFI when using ACPI (which is >> already the case in practice). Then, we can

[Qemu-devel] [PATCH] ARM: Virt: Don't generate RTC ACPI node when using UEFI

2016-01-12 Thread Shannon Zhao
When booting VM through UEFI, UEFI takes ownership of the RTC hardware. To DTB UEFI could call libfdt api to disable the RTC device node, but to ACPI it couldn't do that. Therefore, we don't generate the RTC ACPI device in QEMU when using UEFI. Signed-off-by: Shannon Zhao

Re: [Qemu-devel] [PATCH] ARM: Virt: Don't generate RTC ACPI node when using UEFI

2016-01-12 Thread Peter Maydell
On 12 January 2016 at 15:24, Shannon Zhao wrote: > When booting VM through UEFI, UEFI takes ownership of the RTC hardware. > To DTB UEFI could call libfdt api to disable the RTC device node, but to > ACPI it couldn't do that. Therefore, we don't generate the RTC ACPI >

Re: [Qemu-devel] [PATCH] ARM: Virt: Don't generate RTC ACPI node when using UEFI

2016-01-12 Thread Shannon Zhao
On 2016/1/12 23:30, Peter Maydell wrote: > On 12 January 2016 at 15:24, Shannon Zhao wrote: >> > When booting VM through UEFI, UEFI takes ownership of the RTC hardware. >> > To DTB UEFI could call libfdt api to disable the RTC device node, but to >> > ACPI it couldn't