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From: David Gibson <david@gibson.dropbear.id.au>
To: Tony Nguyen <tony.nguyen@bt.com>
Cc: qemu-ppc@nongnu.org, Peter Maydell <peter.maydell@linaro.org>,
	qemu-arm@nongnu.org, Peter Chubb <peter.chubb@nicta.com.au>,
	qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [RFC PATCH 07/17] hw/i2c: Declare device little or big endian
Date: Sat, 24 Aug 2019 19:27:10 +1000
Message-ID: <20190824092710.GH3027@umbus.fritz.box> (raw)
In-Reply-To: <90bd564769dbabaa7cf70b08e77170d54fa4b625.1566467963.git.tony.nguyen@bt.com>

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On Sat, Aug 24, 2019 at 04:56:28AM +1000, Tony Nguyen wrote:
> For each device declared with DEVICE_NATIVE_ENDIAN, find the set of
> targets from the set of target/hw/*/device.o.
> 
> If the set of targets are all little or all big endian, re-declare
> the device endianness as DEVICE_LITTLE_ENDIAN or DEVICE_BIG_ENDIAN
> respectively.
> 
> This *naive* deduction may result in genuinely native endian devices
> being incorrectly declared as little or big endian, but should not
> introduce regressions for current targets.
> 
> These devices should be re-declared as DEVICE_NATIVE_ENDIAN if 1) it
> has a new target with an opposite endian or 2) someone informed knows
> better =)
> 
> Signed-off-by: Tony Nguyen <tony.nguyen@bt.com>
> ---
>  hw/i2c/imx_i2c.c       | 2 +-
>  hw/i2c/mpc_i2c.c       | 2 +-
>  hw/i2c/versatile_i2c.c | 2 +-
>  3 files changed, 3 insertions(+), 3 deletions(-)

ppc part (mpc_i2c.c)
Acked-by: David Gibson <david@gibson.dropbear.id.au>

> 
> diff --git a/hw/i2c/imx_i2c.c b/hw/i2c/imx_i2c.c
> index 30b9aea247..cc2689d967 100644
> --- a/hw/i2c/imx_i2c.c
> +++ b/hw/i2c/imx_i2c.c
> @@ -278,7 +278,7 @@ static const MemoryRegionOps imx_i2c_ops = {
>      .write = imx_i2c_write,
>      .valid.min_access_size = 1,
>      .valid.max_access_size = 2,
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> +    .endianness = DEVICE_LITTLE_ENDIAN,
>  };
>  
>  static const VMStateDescription imx_i2c_vmstate = {
> diff --git a/hw/i2c/mpc_i2c.c b/hw/i2c/mpc_i2c.c
> index 0aa1be3ce7..b71b5ff7d5 100644
> --- a/hw/i2c/mpc_i2c.c
> +++ b/hw/i2c/mpc_i2c.c
> @@ -306,7 +306,7 @@ static const MemoryRegionOps i2c_ops = {
>      .read =  mpc_i2c_read,
>      .write =  mpc_i2c_write,
>      .valid.max_access_size = 1,
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> +    .endianness = DEVICE_BIG_ENDIAN,
>  };
>  
>  static const VMStateDescription mpc_i2c_vmstate = {
> diff --git a/hw/i2c/versatile_i2c.c b/hw/i2c/versatile_i2c.c
> index 1ac2a6f59a..c92d3b115c 100644
> --- a/hw/i2c/versatile_i2c.c
> +++ b/hw/i2c/versatile_i2c.c
> @@ -77,7 +77,7 @@ static void versatile_i2c_write(void *opaque, hwaddr offset,
>  static const MemoryRegionOps versatile_i2c_ops = {
>      .read = versatile_i2c_read,
>      .write = versatile_i2c_write,
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> +    .endianness = DEVICE_LITTLE_ENDIAN,
>  };
>  
>  static void versatile_i2c_init(Object *obj)

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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  reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-23 18:56 [Qemu-devel] [RFC PATCH 00/17] " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 01/17] hw/audio: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 02/17] hw/block: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 03/17] hw/char: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 04/17] hw/display: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 05/17] hw/dma: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 06/17] hw/gpio: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 07/17] hw/i2c: " Tony Nguyen
2019-08-24  9:27   ` David Gibson [this message]
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 08/17] hw/input: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 09/17] hw/intc: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 10/17] hw/isa: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 11/17] hw/misc: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 12/17] hw/net: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 13/17] hw/pci-host: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 14/17] hw/sd: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 15/17] hw/ssi: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 16/17] hw/timer: " Tony Nguyen
2019-08-23 18:56 ` [Qemu-devel] [RFC PATCH 17/17] build: Correct non-common common-obj-* to obj-* Tony Nguyen
2019-08-23 20:05   ` Paolo Bonzini
2019-08-23 19:42 ` [Qemu-devel] [RFC PATCH 00/17] Declare device little or big endian no-reply

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