From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
To: Bin Meng <bmeng@tinylab.org>,
Alistair Francis <Alistair.Francis@wdc.com>,
qemu-devel@nongnu.org
Cc: "Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>
Subject: Re: [PATCH 07/12] hw/char: riscv_htif: Support console output via proxy syscall
Date: Tue, 27 Dec 2022 14:37:08 -0300 [thread overview]
Message-ID: <2cd2e26a-a57b-faea-8d07-cf64a630bdf7@ventanamicro.com> (raw)
In-Reply-To: <20221227064812.1903326-8-bmeng@tinylab.org>
On 12/27/22 03:48, Bin Meng wrote:
> At present the HTIF proxy syscall is unsupported. On RV32, only
> device 0 is supported so there is no console device for RV32.
> The only way to implement console funtionality on RV32 is to
> support the SYS_WRITE syscall.
>
> With this commit, the Spike machine is able to boot the 32-bit
> OpenSBI generic image.
>
> Signed-off-by: Bin Meng <bmeng@tinylab.org>
> ---
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
>
> hw/char/riscv_htif.c | 17 ++++++++++++++++-
> 1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/hw/char/riscv_htif.c b/hw/char/riscv_htif.c
> index 3bb0a37a3e..1477fc0090 100644
> --- a/hw/char/riscv_htif.c
> +++ b/hw/char/riscv_htif.c
> @@ -48,6 +48,9 @@
> #define HTIF_CONSOLE_CMD_GETC 0
> #define HTIF_CONSOLE_CMD_PUTC 1
>
> +/* PK system call number */
> +#define PK_SYS_WRITE 64
> +
> static uint64_t fromhost_addr, tohost_addr;
> static int address_symbol_set;
>
> @@ -165,7 +168,19 @@ static void htif_handle_tohost_write(HTIFState *s, uint64_t val_written)
> int exit_code = payload >> 1;
> exit(exit_code);
> } else {
> - qemu_log_mask(LOG_UNIMP, "pk syscall proxy not supported\n");
> + uint64_t syscall[8];
> + cpu_physical_memory_read(payload, syscall, sizeof(syscall));
> + if (syscall[0] == PK_SYS_WRITE &&
> + syscall[1] == HTIF_DEV_CONSOLE &&
> + syscall[3] == HTIF_CONSOLE_CMD_PUTC) {
> + uint8_t ch;
> + cpu_physical_memory_read(syscall[2], &ch, 1);
> + qemu_chr_fe_write(&s->chr, &ch, 1);
> + resp = 0x100 | (uint8_t)payload;
> + } else {
> + qemu_log_mask(LOG_UNIMP,
> + "pk syscall proxy not supported\n");
> + }
> }
> } else {
> qemu_log("HTIF device %d: unknown command\n", device);
next prev parent reply other threads:[~2022-12-27 17:37 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-27 6:48 [PATCH 00/12] hw/riscv: Improve Spike HTIF emulation fidelity Bin Meng
2022-12-27 6:48 ` [PATCH 01/12] hw/char: riscv_htif: Avoid using magic numbers Bin Meng
2022-12-27 17:28 ` Daniel Henrique Barboza
2022-12-28 3:31 ` Alistair Francis
2022-12-27 6:48 ` [PATCH 02/12] hw/char: riscv_htif: Drop {to, from}host_size in HTIFState Bin Meng
2022-12-27 17:29 ` [PATCH 02/12] hw/char: riscv_htif: Drop {to,from}host_size " Daniel Henrique Barboza
2022-12-28 3:32 ` [PATCH 02/12] hw/char: riscv_htif: Drop {to, from}host_size " Alistair Francis
2022-12-27 6:48 ` [PATCH 03/12] hw/char: riscv_htif: Drop useless assignment of memory region Bin Meng
2022-12-27 17:30 ` Daniel Henrique Barboza
2022-12-28 3:33 ` Alistair Francis
2022-12-27 6:48 ` [PATCH 04/12] hw/char: riscv_htif: Use conventional 's' for HTIFState Bin Meng
2022-12-27 17:32 ` Daniel Henrique Barboza
2022-12-28 3:35 ` Alistair Francis
2022-12-27 6:48 ` [PATCH 05/12] hw/char: riscv_htif: Move registers from CPUArchState to HTIFState Bin Meng
2022-12-27 17:33 ` Daniel Henrique Barboza
2022-12-28 4:19 ` Alistair Francis
2022-12-27 6:48 ` [PATCH 06/12] hw/char: riscv_htif: Remove forward declarations for non-existent variables Bin Meng
2022-12-27 17:35 ` Daniel Henrique Barboza
2022-12-28 4:22 ` Alistair Francis
2022-12-27 6:48 ` [PATCH 07/12] hw/char: riscv_htif: Support console output via proxy syscall Bin Meng
2022-12-27 17:37 ` Daniel Henrique Barboza [this message]
2022-12-28 4:30 ` Alistair Francis
2022-12-27 6:48 ` [PATCH 08/12] hw/riscv: spike: Remove the out-of-date comments Bin Meng
2022-12-27 17:37 ` Daniel Henrique Barboza
2022-12-28 4:30 ` Alistair Francis
2022-12-27 6:48 ` [PATCH 09/12] hw/riscv/boot.c: make riscv_find_firmware() static Bin Meng
2022-12-27 6:48 ` [PATCH 10/12] hw/riscv/boot.c: introduce riscv_default_firmware_name() Bin Meng
2022-12-27 6:48 ` [PATCH 11/12] hw/riscv/boot.c: Introduce riscv_find_firmware() Bin Meng
2022-12-27 17:40 ` Daniel Henrique Barboza
2022-12-28 4:35 ` Alistair Francis
2022-12-27 6:48 ` [PATCH 12/12] hw/riscv: spike: Decouple create_fdt() dependency to ELF loading Bin Meng
2022-12-27 14:33 ` Daniel Henrique Barboza
2022-12-27 17:51 ` [PATCH 00/12] hw/riscv: Improve Spike HTIF emulation fidelity Daniel Henrique Barboza
2022-12-28 3:58 ` Bin Meng
2022-12-28 4:21 ` Alistair Francis
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