Commit 3d91c537 authored by Borislav Petkov (AMD)'s avatar Borislav Petkov (AMD) Committed by Thomas Gleixner
Browse files

x86/coco: Export cc_vendor 



It will be used in different checks in future changes. Export it directly
and provide accessor functions and stubs so this can be used in general
code when CONFIG_ARCH_HAS_CC_PLATFORM is not set.

No functional changes.

[ tglx: Add accessor functions ]

Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230318115634.9392-2-bp@alien8.de
parent e8d018dd

arch/x86/coco/core.c

+4 −9
Original line number Diff line number Diff line
@@ -13,7 +13,7 @@ 
#include <asm/coco.h>

#include <asm/processor.h>



static enum cc_vendor vendor __ro_after_init;

enum cc_vendor cc_vendor __ro_after_init;

static u64 cc_mask __ro_after_init;



static bool intel_cc_platform_has(enum cc_attr attr)
@@ -83,7 +83,7 @@ static bool hyperv_cc_platform_has(enum cc_attr attr) 


bool cc_platform_has(enum cc_attr attr)

{

	switch (vendor) {

	switch (cc_vendor) {

	case CC_VENDOR_AMD:

		return amd_cc_platform_has(attr);

	case CC_VENDOR_INTEL:
@@ -105,7 +105,7 @@ u64 cc_mkenc(u64 val) 
	 * - for AMD, bit *set* means the page is encrypted

	 * - for Intel *clear* means encrypted.

	 */

	switch (vendor) {

	switch (cc_vendor) {

	case CC_VENDOR_AMD:

		return val | cc_mask;

	case CC_VENDOR_INTEL:
@@ -118,7 +118,7 @@ u64 cc_mkenc(u64 val) 
u64 cc_mkdec(u64 val)

{

	/* See comment in cc_mkenc() */

	switch (vendor) {

	switch (cc_vendor) {

	case CC_VENDOR_AMD:

		return val & ~cc_mask;

	case CC_VENDOR_INTEL:
@@ -129,11 +129,6 @@ u64 cc_mkdec(u64 val) 
}

EXPORT_SYMBOL_GPL(cc_mkdec);



__init void cc_set_vendor(enum cc_vendor v)

{

	vendor = v;

}



__init void cc_set_mask(u64 mask)

{

	cc_mask = mask;

arch/x86/include/asm/coco.h

+20 −3
Original line number Diff line number Diff line
@@ -11,13 +11,30 @@ enum cc_vendor { 
	CC_VENDOR_INTEL,

};



void cc_set_vendor(enum cc_vendor v);

void cc_set_mask(u64 mask);



#ifdef CONFIG_ARCH_HAS_CC_PLATFORM

extern enum cc_vendor cc_vendor;



static inline enum cc_vendor cc_get_vendor(void)

{

	return cc_vendor;

}



static inline void cc_set_vendor(enum cc_vendor vendor)

{

	cc_vendor = vendor;

}



void cc_set_mask(u64 mask);

u64 cc_mkenc(u64 val);

u64 cc_mkdec(u64 val);

#else

static inline enum cc_vendor cc_get_vendor(void)

{

	return CC_VENDOR_NONE;

}



static inline void cc_set_vendor(enum cc_vendor vendor) { }



static inline u64 cc_mkenc(u64 val)

{

	return val;