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radv: enable the trap handler and configure the shader exceptions

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When TRAP_PRESENT is not enabled, all traps and exceptions are ignored.
Only EXCP_EN.mem_viol is currently supported because the other
exceptions have to be tested/validated first.

EXCP_EN.mem_viol is used to detect any sort of invalid memory
access like VM fault. When a memory violation is reported, the
hw jumps to the trap handler.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6384>
This commit is contained in:
Samuel Pitoiset
2020-08-18 08:49:11 +02:00
committed by Marge Bot
parent af3230e39e
commit 8e97a61cfb
1 changed files with 12 additions and 2 deletions
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14
src/amd/vulkan/radv_shader.c
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@@ -805,12 +805,13 @@ radv_get_shader_binary_size(size_t code_size)
return code_size + DEBUGGER_NUM_MARKERS * 4;
}
static void radv_postprocess_config(const struct radv_physical_device *pdevice,
static void radv_postprocess_config(const struct radv_device *device,
const struct ac_shader_config *config_in,
const struct radv_shader_info *info,
gl_shader_stage stage,
struct ac_shader_config *config_out)
{
const struct radv_physical_device *pdevice = device->physical_device;
bool scratch_enabled = config_in->scratch_bytes_per_wave > 0;
unsigned vgpr_comp_cnt = 0;
unsigned num_input_vgprs = info->num_input_vgprs;
@@ -836,6 +837,15 @@ static void radv_postprocess_config(const struct radv_physical_device *pdevice,
config_out->rsrc2 = S_00B12C_USER_SGPR(info->num_user_sgprs) |
S_00B12C_SCRATCH_EN(scratch_enabled);
if (device->trap_handler_shader) {
/* Enable the trap handler if requested and configure the
* shader exceptions like memory violation, etc.
* TODO: Enable (and validate) more exceptions.
*/
config_out->rsrc2 |= S_00B12C_TRAP_PRESENT(1) |
S_00B12C_EXCP_EN(1 << 8); /* mem_viol */
}
if (!pdevice->use_ngg_streamout) {
config_out->rsrc2 |= S_00B12C_SO_BASE0_EN(!!info->so.strides[0]) |
S_00B12C_SO_BASE1_EN(!!info->so.strides[1]) |
@@ -1108,7 +1118,7 @@ radv_shader_variant_create(struct radv_device *device,
}
variant->info = binary->info;
radv_postprocess_config(device->physical_device, &config, &binary->info,
radv_postprocess_config(device, &config, &binary->info,
binary->stage, &variant->config);
void *dest_ptr = radv_alloc_shader_memory(device, variant);