From 32aaf780e7811e7678d2d88eff564602088fc1f2 Mon Sep 17 00:00:00 2001 From: Felix Kuehling Date: Wed, 15 Feb 2017 18:02:44 -0500 Subject: [PATCH 1222/4131] drm/amdkfd: Module option to disable CRAT table Change-Id: Ieab5db54efd761d08a5c68bea9d8278bf53548ea Signed-off-by: Felix Kuehling --- drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 5 +++++ drivers/gpu/drm/amd/amdkfd/kfd_module.c | 5 +++++ drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 6 ++++++ 3 files changed, 16 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c index 3681fcf..054ac54 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c @@ -682,6 +682,11 @@ int kfd_create_crat_image_acpi(void **crat_image, size_t *size) return -EINVAL; } + if (ignore_crat) { + pr_info("CRAT table disabled by module option\n"); + return -ENODATA; + } + pcrat_image = kmalloc(crat_table->length, GFP_KERNEL); if (!pcrat_image) { pr_err("No memory for allocating CRAT image\n"); diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_module.c b/drivers/gpu/drm/amd/amdkfd/kfd_module.c index 274312f..a529fe1 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_module.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c @@ -80,6 +80,11 @@ module_param(debug_largebar, int, 0444); MODULE_PARM_DESC(debug_largebar, "Debug large-bar flag used to simulate large-bar capability on non-large bar machine (0 = disable, 1 = enable)"); +int ignore_crat; +module_param(ignore_crat, int, 0444); +MODULE_PARM_DESC(ignore_crat, + "Ignore CRAT table during KFD initialization (0 = use CRAT (default), 1 = ignore CRAT)"); + int kgd2kfd_init(unsigned interface_version, const struct kgd2kfd_calls **g2f) { if (!amdkfd_init_completed) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index 122e9e4..a9e5618 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -127,6 +127,12 @@ extern int send_sigterm; */ extern int debug_largebar; +/* + * Ignore CRAT table during KFD initialization, can be used to work around + * broken CRAT tables on some AMD systems + */ +extern int ignore_crat; + /** * enum kfd_sched_policy * -- 2.7.4