diff options
| author | Rebecca Cran <rebecca@nuviainc.com> | 2021-02-16 15:45:41 -0700 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-03-05 15:17:34 +0000 |
| commit | f2f68a78b793808b84367bc708d632969d4440aa (patch) | |
| tree | 4fd6691d997c646de5e72fc97f9660ede5a5701e /target/arm/translate-a64.c | |
| parent | cecc0962099b4967473383bf28f12bef47e62cca (diff) | |
target/arm: Add support for FEAT_SSBS, Speculative Store Bypass Safe
Add support for FEAT_SSBS. SSBS (Speculative Store Bypass Safe) is an
optional feature in ARMv8.0, and mandatory in ARMv8.5.
Signed-off-by: Rebecca Cran <rebecca@nuviainc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210216224543.16142-2-rebecca@nuviainc.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/translate-a64.c')
| -rw-r--r-- | target/arm/translate-a64.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index b23a8975d5..3aebdb4af9 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -1703,6 +1703,18 @@ static void handle_msr_i(DisasContext *s, uint32_t insn, tcg_temp_free_i32(t1); break; + case 0x19: /* SSBS */ + if (!dc_isar_feature(aa64_ssbs, s)) { + goto do_unallocated; + } + if (crm & 1) { + set_pstate_bits(PSTATE_SSBS); + } else { + clear_pstate_bits(PSTATE_SSBS); + } + /* Don't need to rebuild hflags since SSBS is a nop */ + break; + case 0x1a: /* DIT */ if (!dc_isar_feature(aa64_dit, s)) { goto do_unallocated; |