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treewide: Replace the use of mem_encrypt_active() with cc_platform_has()

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Replace uses of mem_encrypt_active() with calls to cc_platform_has() with
the CC_ATTR_MEM_ENCRYPT attribute.

Remove the implementation of mem_encrypt_active() across all arches.

For s390, since the default implementation of the cc_platform_has()
matches the s390 implementation of mem_encrypt_active(), cc_platform_has()
does not need to be implemented in s390 (the config option
ARCH_HAS_CC_PLATFORM is not set).

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210928191009.32551-9-bp@alien8.de
This commit is contained in:
Tom Lendacky
2021-09-08 17:58:39 -05:00
committed by Borislav Petkov
parent 6283f2effb
commit e9d1d2bb75
18 changed files with 36 additions and 40 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
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@@ -38,6 +38,7 @@
#include <drm/drm_probe_helper.h>
#include <linux/mmu_notifier.h>
#include <linux/suspend.h>
#include <linux/cc_platform.h>
#include "amdgpu.h"
#include "amdgpu_irq.h"
@@ -1269,7 +1270,8 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
* however, SME requires an indirect IOMMU mapping because the encryption
* bit is beyond the DMA mask of the chip.
*/
if (mem_encrypt_active() && ((flags & AMD_ASIC_MASK) == CHIP_RAVEN)) {
if (cc_platform_has(CC_ATTR_MEM_ENCRYPT) &&
((flags & AMD_ASIC_MASK) == CHIP_RAVEN)) {
dev_info(&pdev->dev,
"SME is not compatible with RAVEN\n");
return -ENOTSUPP;