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Re: [Qemu-devel] [PATCH] memory: Fix assertion for flash devices
From: |
Aurelien Jarno |
Subject: |
Re: [Qemu-devel] [PATCH] memory: Fix assertion for flash devices |
Date: |
Sat, 7 Jan 2012 21:29:08 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Sat, Jan 07, 2012 at 12:13:46PM +0100, Stefan Weil wrote:
> There is a regression since commit c5705a7728b4a6bc9e4f2d35911adbaf28042b25
> or some other recent change.
>
> System emulation with a flash device raises an assertion in function
> qemu_ram_set_idstr because no new_block is found at the requested addr.
>
> The address of the memory region (mr->ram_addr) is set by
> memory_region_init_rom_device:
>
> mr->ram_addr = qemu_ram_alloc(size, mr);
> mr->ram_addr |= cpu_register_io_memory(mr);
>
> The 2nd line adds a small offset to mr->ram_addr, and this offset
> makes ram_set_idstr fail with an assertion.
>
> Masking mr->ram_addr with the target's page mask removes the small
> offset and makes flash devices work again.
>
> Cc: Avi Kivity <address@hidden>
> Signed-off-by: Stefan Weil <address@hidden>
> ---
> memory.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
I can't confirm the patch is correct, but at least I can confirm it fix
the breakage.
Tested-by: Aurelien Jarno <address@hidden>
--
Aurelien Jarno GPG: 1024D/F1BCDB73
address@hidden http://www.aurel32.net