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| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-02-03 10:26:26 +0300 |
|---|---|---|
| committer | Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-02-03 10:26:26 +0300 |
| commit | ee95f4059a833839bf52972191b2d4c3d3cec552 (patch) | |
| tree | a1c8587d9b82e64a75dde376a90a3d69b0f4847a /arch/powerpc/include/asm/exception-64s.h | |
| parent | d121f07691415df824e6b60520f782f6d13b3c81 (diff) | |
| parent | f81e1d35a6e36d30888c46283b8dd1022e847124 (diff) | |
| download | linux-ee95f4059a833839bf52972191b2d4c3d3cec552.tar.xz | |
Merge branch 'for-4.16/nfit' into libnvdimm-for-next
Diffstat (limited to 'arch/powerpc/include/asm/exception-64s.h')
| -rw-r--r-- | arch/powerpc/include/asm/exception-64s.h | 57 |
1 files changed, 55 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h index b27205297e1d..7197b179c1b1 100644 --- a/arch/powerpc/include/asm/exception-64s.h +++ b/arch/powerpc/include/asm/exception-64s.h @@ -74,6 +74,59 @@ */ #define EX_R3 EX_DAR +/* + * Macros for annotating the expected destination of (h)rfid + * + * The nop instructions allow us to insert one or more instructions to flush the + * L1-D cache when returning to userspace or a guest. + */ +#define RFI_FLUSH_SLOT \ + RFI_FLUSH_FIXUP_SECTION; \ + nop; \ + nop; \ + nop + +#define RFI_TO_KERNEL \ + rfid + +#define RFI_TO_USER \ + RFI_FLUSH_SLOT; \ + rfid; \ + b rfi_flush_fallback + +#define RFI_TO_USER_OR_KERNEL \ + RFI_FLUSH_SLOT; \ + rfid; \ + b rfi_flush_fallback + +#define RFI_TO_GUEST \ + RFI_FLUSH_SLOT; \ + rfid; \ + b rfi_flush_fallback + +#define HRFI_TO_KERNEL \ + hrfid + +#define HRFI_TO_USER \ + RFI_FLUSH_SLOT; \ + hrfid; \ + b hrfi_flush_fallback + +#define HRFI_TO_USER_OR_KERNEL \ + RFI_FLUSH_SLOT; \ + hrfid; \ + b hrfi_flush_fallback + +#define HRFI_TO_GUEST \ + RFI_FLUSH_SLOT; \ + hrfid; \ + b hrfi_flush_fallback + +#define HRFI_TO_UNKNOWN \ + RFI_FLUSH_SLOT; \ + hrfid; \ + b hrfi_flush_fallback + #ifdef CONFIG_RELOCATABLE #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ @@ -218,7 +271,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943) mtspr SPRN_##h##SRR0,r12; \ mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ mtspr SPRN_##h##SRR1,r10; \ - h##rfid; \ + h##RFI_TO_KERNEL; \ b . /* prevent speculative execution */ #define EXCEPTION_PROLOG_PSERIES_1(label, h) \ __EXCEPTION_PROLOG_PSERIES_1(label, h) @@ -232,7 +285,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943) mtspr SPRN_##h##SRR0,r12; \ mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ mtspr SPRN_##h##SRR1,r10; \ - h##rfid; \ + h##RFI_TO_KERNEL; \ b . /* prevent speculative execution */ #define EXCEPTION_PROLOG_PSERIES_1_NORI(label, h) \ |