[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH v3 6/6] hw/char: cadence_uart: Log a guest error when device
From: |
Alistair Francis |
Subject: |
Re: [PATCH v3 6/6] hw/char: cadence_uart: Log a guest error when device is unclocked or in reset |
Date: |
Thu, 2 Sep 2021 12:52:18 +1000 |
On Wed, Sep 1, 2021 at 10:52 PM Bin Meng <bmeng.cn@gmail.com> wrote:
>
> We've got SW that expects FSBL (Bootlooader) to setup clocks and
> resets. It's quite common that users run that SW on QEMU without
> FSBL (FSBL typically requires the Xilinx tools installed). That's
> fine, since users can stil use -device loader to enable clocks etc.
>
> To help folks understand what's going, a log (guest-error) message
> would be helpful here. In particular with the serial port since
> things will go very quiet if they get things wrong.
>
> Suggested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
> Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Alistair
>
> ---
>
> Changes in v3:
> - new patch: hw/char: cadence_uart: Log a guest error when unclocked or in
> reset
>
> hw/char/cadence_uart.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c
> index 5f5a4645ac..c069a30842 100644
> --- a/hw/char/cadence_uart.c
> +++ b/hw/char/cadence_uart.c
> @@ -240,6 +240,8 @@ static int uart_can_receive(void *opaque)
>
> /* ignore characters when unclocked or in reset */
> if (!clock_is_enabled(s->refclk) || device_is_in_reset(DEVICE(s))) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: uart is unclocked or in reset\n",
> + __func__);
> return 0;
> }
>
> @@ -376,6 +378,8 @@ static void uart_event(void *opaque, QEMUChrEvent event)
>
> /* ignore characters when unclocked or in reset */
> if (!clock_is_enabled(s->refclk) || device_is_in_reset(DEVICE(s))) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: uart is unclocked or in reset\n",
> + __func__);
> return;
> }
>
> @@ -413,6 +417,8 @@ static MemTxResult uart_write(void *opaque, hwaddr offset,
>
> /* ignore access when unclocked or in reset */
> if (!clock_is_enabled(s->refclk) || device_is_in_reset(DEVICE(s))) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: uart is unclocked or in reset\n",
> + __func__);
> return MEMTX_ERROR;
> }
>
> @@ -478,6 +484,8 @@ static MemTxResult uart_read(void *opaque, hwaddr offset,
>
> /* ignore access when unclocked or in reset */
> if (!clock_is_enabled(s->refclk) || device_is_in_reset(DEVICE(s))) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: uart is unclocked or in reset\n",
> + __func__);
> return MEMTX_ERROR;
> }
>
> --
> 2.25.1
>
>
- [PATCH v3 0/6] hw/arm: xilinx_zynq: Fix upstream U-Boot boot failure, Bin Meng, 2021/09/01
- [PATCH v3 1/6] hw/misc: zynq_slcr: Correctly compute output clocks in the reset exit phase, Bin Meng, 2021/09/01
- [PATCH v3 2/6] hw/char: cadence_uart: Disable transmit when input clock is disabled, Bin Meng, 2021/09/01
- [PATCH v3 3/6] hw/char: cadence_uart: Move clock/reset check to uart_can_receive(), Bin Meng, 2021/09/01
- [PATCH v3 4/6] hw/char: cadence_uart: Convert to memop_with_attrs() ops, Bin Meng, 2021/09/01
- [PATCH v3 5/6] hw/char: cadence_uart: Ignore access when unclocked or in reset for uart_{read, write}(), Bin Meng, 2021/09/01
- [PATCH v3 6/6] hw/char: cadence_uart: Log a guest error when device is unclocked or in reset, Bin Meng, 2021/09/01
- Re: [PATCH v3 6/6] hw/char: cadence_uart: Log a guest error when device is unclocked or in reset,
Alistair Francis <=
- Re: [PATCH v3 0/6] hw/arm: xilinx_zynq: Fix upstream U-Boot boot failure, Edgar E. Iglesias, 2021/09/02