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| author | Paul Burton <paul.burton@imgtec.com> | 2017-06-02 15:38:01 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-06-29 02:42:29 +0200 |
| commit | e7bc8557428f069eaa613b3676ea6931c0f7fe43 (patch) | |
| tree | c7f4f7a8b42f6c974159eef349eb041b5ea7b570 /arch/mips/include/asm/cpu.h | |
| parent | fa7a3b4a7217b40bf58c4f38e5ee573b43a8aa2f (diff) | |
| download | op-kernel-dev-e7bc8557428f069eaa613b3676ea6931c0f7fe43.zip op-kernel-dev-e7bc8557428f069eaa613b3676ea6931c0f7fe43.tar.gz | |
MIPS: Add CPU shared FTLB feature detection
Some systems share FTLB RAMs or entries between sibling CPUs (ie.
hardware threads, or VP(E)s, within a core). These properties require
kernel handling in various places. As a start this patch introduces
cpu_has_shared_ftlb_ram & cpu_has_shared_ftlb_entries feature macros
which we set appropriately for I6400 & I6500 CPUs. Further patches will
make use of these macros as appropriate.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16202/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/cpu.h')
| -rw-r--r-- | arch/mips/include/asm/cpu.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h index 53b8b1f..ce79859 100644 --- a/arch/mips/include/asm/cpu.h +++ b/arch/mips/include/asm/cpu.h @@ -418,6 +418,10 @@ enum cpu_type_enum { #define MIPS_CPU_GUESTID MBIT_ULL(51) /* CPU uses VZ ASE GuestID feature */ #define MIPS_CPU_DRG MBIT_ULL(52) /* CPU has VZ Direct Root to Guest (DRG) */ #define MIPS_CPU_UFR MBIT_ULL(53) /* CPU supports User mode FR switching */ +#define MIPS_CPU_SHARED_FTLB_RAM \ + MBIT_ULL(54) /* CPU shares FTLB RAM with another */ +#define MIPS_CPU_SHARED_FTLB_ENTRIES \ + MBIT_ULL(55) /* CPU shares FTLB entries with another */ /* * CPU ASE encodings |
