forked from Minki/linux
c6202ca764
ADI feature on M7 and newer processors has three important properties relevant to userspace apps using ADI capabilities - (1) Size of block of memory an ADI version tag applies to, (2) Number of uppermost bits in virtual address used to encode ADI tag, and (3) The value M7 processor will force the ADI tags to if it detects uncorrectable error in an ADI tagged cacheline. Kernel can retrieve these properties for a platform through machine description provided by the firmware. This patch adds code to retrieve these properties and report them to userspace through auxiliary vectors. Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com> Cc: Khalid Aziz <khalid@gonehiking.org> Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
48 lines
839 B
C
48 lines
839 B
C
/* adi_64.h: ADI related data structures
|
|
*
|
|
* Copyright (c) 2016 Oracle and/or its affiliates. All rights reserved.
|
|
* Author: Khalid Aziz (khalid.aziz@oracle.com)
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2.
|
|
*/
|
|
#ifndef __ASM_SPARC64_ADI_H
|
|
#define __ASM_SPARC64_ADI_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
struct adi_caps {
|
|
__u64 blksz;
|
|
__u64 nbits;
|
|
__u64 ue_on_adi;
|
|
};
|
|
|
|
struct adi_config {
|
|
bool enabled;
|
|
struct adi_caps caps;
|
|
};
|
|
|
|
extern struct adi_config adi_state;
|
|
|
|
extern void mdesc_adi_init(void);
|
|
|
|
static inline bool adi_capable(void)
|
|
{
|
|
return adi_state.enabled;
|
|
}
|
|
|
|
static inline unsigned long adi_blksize(void)
|
|
{
|
|
return adi_state.caps.blksz;
|
|
}
|
|
|
|
static inline unsigned long adi_nbits(void)
|
|
{
|
|
return adi_state.caps.nbits;
|
|
}
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* !(__ASM_SPARC64_ADI_H) */
|