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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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6
drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
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@@ -28,7 +28,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/mem_encrypt.h>
#include <linux/cc_platform.h>
#include <asm/hypervisor.h>
#include <drm/drm_ioctl.h>
@@ -160,7 +160,7 @@ static unsigned long vmw_port_hb_out(struct rpc_channel *channel,
unsigned long msg_len = strlen(msg);
/* HB port can't access encrypted memory. */
if (hb && !mem_encrypt_active()) {
if (hb && !cc_platform_has(CC_ATTR_MEM_ENCRYPT)) {
unsigned long bp = channel->cookie_high;
u32 channel_id = (channel->channel_id << 16);
@@ -216,7 +216,7 @@ static unsigned long vmw_port_hb_in(struct rpc_channel *channel, char *reply,
unsigned long si, di, eax, ebx, ecx, edx;
/* HB port can't access encrypted memory */
if (hb && !mem_encrypt_active()) {
if (hb && !cc_platform_has(CC_ATTR_MEM_ENCRYPT)) {
unsigned long bp = channel->cookie_low;
u32 channel_id = (channel->channel_id << 16);