From: "Richard W.M. Jones" <rjones@redhat.com>
To: Anup Patel <Anup.Patel@wdc.com>
Cc: "qemu-riscv@nongnu.org" <qemu-riscv@nongnu.org>,
Sagar Karandikar <sagark@eecs.berkeley.edu>,
Bastian Koppelmann <kbastian@mail.uni-paderborn.de>,
Palmer Dabbelt <palmer@sifive.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Atish Patra <Atish.Patra@wdc.com>,
Alistair Francis <Alistair.Francis@wdc.com>,
Anup Patel <anup@brainfault.org>
Subject: Re: [PATCH 0/2] RTC support for QEMU RISC-V virt machine
Date: Fri, 27 Sep 2019 12:50:47 +0100 [thread overview]
Message-ID: <20190927115047.GA6575@redhat.com> (raw)
In-Reply-To: <20190924084201.107958-1-anup.patel@wdc.com>
On Tue, Sep 24, 2019 at 08:42:36AM +0000, Anup Patel wrote:
> This series adds RTC device to QEMU RISC-V virt machine. We have
> selected Goldfish RTC device model for this. It's a pretty simple
> synthetic device with few MMIO registers and no dependency external
> clock. The driver for Goldfish RTC is already available in Linux so
> we just need to enable it in Kconfig for RISCV and also update Linux
> defconfigs.
>
> We have tested this series with Linux-5.3 plus defconfig changes
> available in 'goldfish_rtc_v1' branch of:
> https://github.com/avpatel/linux.git
Why was this device chosen instead of kvm-clock?
Rich.
> Anup Patel (2):
> hw: timer: Add Goldfish RTC device
> riscv: virt: Use Goldfish RTC device
>
> hw/riscv/Kconfig | 1 +
> hw/riscv/virt.c | 15 +++
> hw/timer/Kconfig | 3 +
> hw/timer/Makefile.objs | 1 +
> hw/timer/goldfish_rtc.c | 221 ++++++++++++++++++++++++++++++++
> include/hw/riscv/virt.h | 2 +
> include/hw/timer/goldfish_rtc.h | 45 +++++++
> 7 files changed, 288 insertions(+)
> create mode 100644 hw/timer/goldfish_rtc.c
> create mode 100644 include/hw/timer/goldfish_rtc.h
>
> --
> 2.17.1
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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next prev parent reply other threads:[~2019-09-27 13:38 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-24 8:42 [PATCH 0/2] RTC support for QEMU RISC-V virt machine Anup Patel
2019-09-24 8:42 ` [PATCH 1/2] hw: timer: Add Goldfish RTC device Anup Patel
2019-09-24 9:50 ` Peter Maydell
2019-09-24 11:17 ` Anup Patel
2019-09-24 11:31 ` Peter Maydell
2019-09-24 12:18 ` Anup Patel
2019-09-24 8:43 ` [PATCH 2/2] riscv: virt: Use " Anup Patel
2019-09-27 11:50 ` Richard W.M. Jones [this message]
2019-09-27 12:05 ` [PATCH 0/2] RTC support for QEMU RISC-V virt machine Anup Patel
2019-09-27 12:30 ` Richard W.M. Jones
2019-09-27 12:39 ` Anup Patel
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