Commit c67d5463da for qemu.org
commit c67d5463dabbf6418784fa0d4ac3a920c7b83aa2
Author: Richard Henderson <richard.henderson@linaro.org>
Date: Tue Jun 9 12:21:03 2026 -0700
target/arm: Enable FEAT_FP8DOT2, FEAT_SSVE_FP8DOT2 for -cpu max
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20260609192110.752384-40-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index f13721c327..0bcd707fc1 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -76,6 +76,7 @@ the following architecture extensions:
- FEAT_FP (Floating Point extensions)
- FEAT_FP16 (Half-precision floating-point data processing)
- FEAT_FP8 (FP8 convert instructions)
+- FEAT_FP8DOT2 (FP8 2-way dot product to half-precision instructions)
- FEAT_FP8DOT4 (FP8 4-way dot product to single-precision instructions)
- FEAT_FP8FMA (FP8 multiply-accumulate to half-precision and single-precision instructions)
- FEAT_FPAC (Faulting on AUT* instructions)
@@ -168,6 +169,7 @@ the following architecture extensions:
- FEAT_SME_F64F64 (Double-precision floating-point outer product instructions)
- FEAT_SME_I16I64 (16-bit to 64-bit integer widening outer product instructions)
- FEAT_SME_LUTv2 (Lookup table instructions with 4-bit indices and 8-bit elements)
+- FEAT_SSVE_FP8DOT2 (SVE2 FP8 2-way dot product to half-precision instructions in Streaming SVE mode)
- FEAT_SSVE_FP8DOT4 (SVE2 FP8 4-way dot product to single-precision instructions in Streaming SVE mode)
- FEAT_SSVE_FP8FMA (SVE2 FP8 multiply-accumulate to half-precision and single-precision instructions in Streaming SVE mode)
- FEAT_SVE (Scalable Vector Extension)
diff --git a/linux-user/aarch64/elfload.c b/linux-user/aarch64/elfload.c
index be33fede6b..d40e39169b 100644
--- a/linux-user/aarch64/elfload.c
+++ b/linux-user/aarch64/elfload.c
@@ -228,8 +228,10 @@ abi_ulong get_elf_hwcap2(CPUState *cs)
ARM_HWCAP2_A64_F8E5M2);
GET_FEATURE_ID(aa64_f8fma, ARM_HWCAP2_A64_F8FMA);
GET_FEATURE_ID(aa64_f8dp4, ARM_HWCAP2_A64_F8DP4);
+ GET_FEATURE_ID(aa64_f8dp2, ARM_HWCAP2_A64_F8DP2);
GET_FEATURE_ID(aa64_ssve_f8fma, ARM_HWCAP2_A64_SME_SF8FMA);
GET_FEATURE_ID(aa64_ssve_f8dp4, ARM_HWCAP2_A64_SME_SF8DP4);
+ GET_FEATURE_ID(aa64_ssve_f8dp2, ARM_HWCAP2_A64_SME_SF8DP2);
return hwcaps;
}
diff --git a/target/arm/tcg/cpu64.c b/target/arm/tcg/cpu64.c
index 831b190b21..3d73977f1e 100644
--- a/target/arm/tcg/cpu64.c
+++ b/target/arm/tcg/cpu64.c
@@ -1383,6 +1383,7 @@ void aarch64_max_tcg_initfn(Object *obj)
SET_IDREG(isar, ID_AA64DFR0, t);
t = GET_IDREG(isar, ID_AA64SMFR0);
+ t = FIELD_DP64(t, ID_AA64SMFR0, SF8DP2, 1); /* FEAT_SSVE_FP8DOT2 */
t = FIELD_DP64(t, ID_AA64SMFR0, SF8DP4, 1); /* FEAT_SSVE_FP8DOT4 */
t = FIELD_DP64(t, ID_AA64SMFR0, SF8FMA, 1); /* FEAT_SSVE_FP8FMA */
t = FIELD_DP64(t, ID_AA64SMFR0, F32F32, 1); /* FEAT_SME */
@@ -1403,6 +1404,7 @@ void aarch64_max_tcg_initfn(Object *obj)
t = GET_IDREG(isar, ID_AA64FPFR0);
t = FIELD_DP64(t, ID_AA64FPFR0, F8E5M2, 1); /* FEAT_FP8 */
t = FIELD_DP64(t, ID_AA64FPFR0, F8E4M3, 1); /* FEAT_FP8 */
+ t = FIELD_DP64(t, ID_AA64FPFR0, F8DP2, 1); /* FEAT_FP8DOT2 */
t = FIELD_DP64(t, ID_AA64FPFR0, F8DP4, 1); /* FEAT_FP8DOT4 */
t = FIELD_DP64(t, ID_AA64FPFR0, F8FMA, 1); /* FEAT_FP8FMA */
t = FIELD_DP64(t, ID_AA64FPFR0, F8CVT, 1); /* FEAT_FP8 */