The DSB nXS variant is always both a reads and writes request type.
Ignore the domain field like we do in plain DSB and perform a full
system barrier operation.
The DSB nXS variant is part of FEAT_XS made mandatory from Armv8.7.
Signed-off-by: Manos Pitsidianakis <manos.pitsidiana...@linaro.org>
---
target/arm/tcg/a64.decode | 3 +++
target/arm/tcg/translate-a64.c | 6 ++++++
2 files changed, 9 insertions(+)
diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode
index
331a8e180c0b14e2abe3ec641a867235574316f7..c4f516abc18224932082cdf3e7530edc7a304bc1
100644
--- a/target/arm/tcg/a64.decode
+++ b/target/arm/tcg/a64.decode
@@ -245,6 +245,9 @@ WFIT 1101 0101 0000 0011 0001 0000 001 rd:5
CLREX 1101 0101 0000 0011 0011 ---- 010 11111
DSB_DMB 1101 0101 0000 0011 0011 domain:2 types:2 10- 11111
+# For the DSB nXS variant, types always equals MBReqTypes_All and we ignore the
+# domain bits.
+DSB_nXS 1101 0101 0000 0011 0011 -- 10 001 11111
ISB 1101 0101 0000 0011 0011 ---- 110 11111
SB 1101 0101 0000 0011 0011 0000 111 11111
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index
071b6349fc38802a62f4b4056e369c4d8b1ecf94..85e71599203eee62b4d22a0b10ed676cc815dab6
100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -1959,6 +1959,12 @@ static bool trans_DSB_DMB(DisasContext *s, arg_DSB_DMB
*a)
return true;
}
+static bool trans_DSB_nXS(DisasContext *ctx, arg_DSB_nXS *a)
+{
+ tcg_gen_mb(TCG_BAR_SC | TCG_MO_ALL);
+ return true;
+}
+
static bool trans_ISB(DisasContext *s, arg_ISB *a)
{
/*
--
2.45.2
