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pan/bi: Add a define for the Bifrost shader prefetch size

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Found by adding NOPs to the start of a shader and checking dmesg to
see at what sizes the GPU faulted trying to read the following
non-executable page.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8428>
This commit is contained in:
Icecream95 2021-01-12 22:21:39 +13:00 • committed by Marge Bot
parent 9a937330ef
commit e74b2edcef
1 changed files with 4 additions and 0 deletions
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4
src/panfrost/bifrost/bifrost_compile.c
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@ -47,6 +47,10 @@ static const struct debug_named_value bifrost_debug_options[] = {
DEBUG_GET_ONCE_FLAGS_OPTION(bifrost_debug, "BIFROST_MESA_DEBUG", bifrost_debug_options, 0)
/* How many bytes are prefetched by the Bifrost shader core. Past the end of
* the shader, this range must contain valid instructions or zero. */
#define BIFROST_SHADER_PREFETCH 96
/* TODO: This is not thread safe!! */
static unsigned SHADER_DB_COUNT = 0;