diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2022-03-01 11:59:56 -1000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2022-03-02 19:27:37 +0000 |
| commit | ef56c2425e5f3e5f14ac080b5f037e5c36a0abdc (patch) | |
| tree | be4229d6e5256d3be6309d2ebb145b6c7b9852aa /target/arm/internals.h | |
| parent | c20281b2a5048a220e09e98e002e6d3119f8c00b (diff) | |
target/arm: Implement FEAT_LPA2
This feature widens physical addresses (and intermediate physical
addresses for 2-stage translation) from 48 to 52 bits, when using
4k or 16k pages.
This introduces the DS bit to TCR_ELx, which is RES0 unless the
page size is enabled and supports LPA2, resulting in the effective
value of DS for a given table walk. The DS bit changes the format
of the page table descriptor slightly, moving the PS field out to
TCR so that all pages have the same sharability and repurposing
those bits of the page table descriptor for the highest bits of
the output address.
Do not yet enable FEAT_LPA2; we need extra plumbing to avoid
tickling an old kernel bug.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220301215958.157011-17-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/internals.h')
| -rw-r--r-- | target/arm/internals.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/target/arm/internals.h b/target/arm/internals.h index 00af41d792..a34be2e459 100644 --- a/target/arm/internals.h +++ b/target/arm/internals.h @@ -1056,6 +1056,7 @@ static inline uint32_t aarch64_pstate_valid_mask(const ARMISARegisters *id) typedef struct ARMVAParameters { unsigned tsz : 8; unsigned ps : 3; + unsigned sh : 2; unsigned select : 1; bool tbi : 1; bool epd : 1; @@ -1063,6 +1064,7 @@ typedef struct ARMVAParameters { bool using16k : 1; bool using64k : 1; bool tsz_oob : 1; /* tsz has been clamped to legal range */ + bool ds : 1; } ARMVAParameters; ARMVAParameters aa64_va_parameters(CPUARMState *env, uint64_t va, |