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Commit 3a50b928 authored by Raghu Ananya Arabolu's avatar Raghu Ananya Arabolu
Browse files

msm: kgsl: Add a flag for guard page allocation 



Add a flag to the user-space API header. Set this flag if a guard
page is needed for each mapped region.

Change-Id: I383fd9893e417195e7bfb03eabe008cd160b59c7
Signed-off-by: default avatarRaghu Ananya Arabolu <rarabolu@codeaurora.org>
parent d740f473

drivers/gpu/msm/kgsl.c

+4 −2
Original line number Diff line number Diff line
@@ -2590,7 +2590,8 @@ long kgsl_ioctl_gpuobj_import(struct kgsl_device_private *dev_priv, 
			| KGSL_MEMFLAGS_USE_CPU_MAP

			| KGSL_MEMFLAGS_SECURE

			| KGSL_MEMFLAGS_FORCE_32BIT

			| KGSL_MEMFLAGS_IOCOHERENT;

			| KGSL_MEMFLAGS_IOCOHERENT

			| KGSL_MEMFLAGS_GUARD_PAGE;



	kgsl_memdesc_init(dev_priv->device, &entry->memdesc, param->flags);

	if (param->type == KGSL_USER_MEM_TYPE_ADDR)
@@ -3269,7 +3270,8 @@ struct kgsl_mem_entry *gpumem_alloc_entry( 
		| KGSL_MEMFLAGS_USE_CPU_MAP

		| KGSL_MEMFLAGS_SECURE

		| KGSL_MEMFLAGS_FORCE_32BIT

		| KGSL_MEMFLAGS_IOCOHERENT;

		| KGSL_MEMFLAGS_IOCOHERENT

		| KGSL_MEMFLAGS_GUARD_PAGE;



	/* Return not supported error if secure memory isn't enabled */

	if (!kgsl_mmu_is_secured(mmu) &&

drivers/gpu/msm/kgsl_sharedmem.c

+2 −1
Original line number Diff line number Diff line
@@ -696,7 +696,8 @@ void kgsl_memdesc_init(struct kgsl_device *device, 
		cachemode == KGSL_CACHEMODE_UNCACHED))

		flags &= ~((u64) KGSL_MEMFLAGS_IOCOHERENT);



	if (kgsl_mmu_has_feature(device, KGSL_MMU_NEED_GUARD_PAGE))

	if (kgsl_mmu_has_feature(device, KGSL_MMU_NEED_GUARD_PAGE) ||

		(flags & KGSL_MEMFLAGS_GUARD_PAGE))

		memdesc->priv |= KGSL_MEMDESC_GUARD_PAGE;



	if (flags & KGSL_MEMFLAGS_SECURE)

include/uapi/linux/msm_kgsl.h

+10 −9
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

/*

 * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.

 * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.

 */



#ifndef _UAPI_MSM_KGSL_H
@@ -126,10 +126,10 @@ 
/* --- Memory allocation flags --- */



/* General allocation hints */

#define KGSL_MEMFLAGS_SECURE      0x00000008ULL

#define KGSL_MEMFLAGS_GPUREADONLY 0x01000000U

#define KGSL_MEMFLAGS_GPUWRITEONLY 0x02000000U

#define KGSL_MEMFLAGS_FORCE_32BIT 0x100000000ULL

#define KGSL_MEMFLAGS_SECURE       (1ULL << 3)

#define KGSL_MEMFLAGS_GPUREADONLY  (1ULL << 24)

#define KGSL_MEMFLAGS_GPUWRITEONLY (1ULL << 25)

#define KGSL_MEMFLAGS_FORCE_32BIT  (1ULL << 32)



/* Flag for binding all the virt range to single phys data */

#define KGSL_SPARSE_BIND_MULTIPLE_TO_PHYS 0x400000000ULL
@@ -145,10 +145,11 @@ 
#define KGSL_CACHEMODE_WRITETHROUGH 2

#define KGSL_CACHEMODE_WRITEBACK 3



#define KGSL_MEMFLAGS_USE_CPU_MAP 0x10000000ULL

#define KGSL_MEMFLAGS_SPARSE_PHYS 0x20000000ULL

#define KGSL_MEMFLAGS_SPARSE_VIRT 0x40000000ULL

#define KGSL_MEMFLAGS_IOCOHERENT  0x80000000ULL

#define KGSL_MEMFLAGS_USE_CPU_MAP (1ULL << 28)

#define KGSL_MEMFLAGS_SPARSE_PHYS (1ULL << 29)

#define KGSL_MEMFLAGS_SPARSE_VIRT (1ULL << 30)

#define KGSL_MEMFLAGS_IOCOHERENT  (1ULL << 31)

#define KGSL_MEMFLAGS_GUARD_PAGE  (1ULL << 33)



/* Memory types for which allocations are made */

#define KGSL_MEMTYPE_MASK		0x0000FF00