From adb49752dd18e556427c634ed1d3570378e87819 Mon Sep 17 00:00:00 2001 From: Andrew Jones Date: Thu, 15 Feb 2024 19:39:55 -0300 Subject: [PATCH] target/riscv: Promote svade to a normal extension Named features are extensions which don't make sense for users to control and are therefore not exposed on the command line. However, svade is an extension which makes sense for users to control, so treat it like a "normal" extension. The default is false, even for the max cpu type, since QEMU has always implemented hardware A/D PTE bit updating, so users must opt into svade (or get it from a CPU type which enables it by default). Reviewed-by: Daniel Henrique Barboza Signed-off-by: Andrew Jones Reviewed-by: Alistair Francis Message-ID: <20240215223955.969568-7-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis --- target/riscv/cpu.c | 9 ++------- target/riscv/tcg/tcg-cpu.c | 6 ++++++ 2 files changed, 8 insertions(+), 7 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index e9cf950d6bc..71bdedc9bbf 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -1474,6 +1474,7 @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = { MULTI_EXT_CFG_BOOL("smepmp", ext_smepmp, false), MULTI_EXT_CFG_BOOL("smstateen", ext_smstateen, false), + MULTI_EXT_CFG_BOOL("svade", ext_svade, false), MULTI_EXT_CFG_BOOL("svadu", ext_svadu, true), MULTI_EXT_CFG_BOOL("svinval", ext_svinval, false), MULTI_EXT_CFG_BOOL("svnapot", ext_svnapot, false), @@ -1589,7 +1590,6 @@ const RISCVCPUMultiExtConfig riscv_cpu_experimental_exts[] = { * and priv_ver like regular extensions. */ const RISCVCPUMultiExtConfig riscv_cpu_named_features[] = { - MULTI_EXT_CFG_BOOL("svade", ext_svade, true), MULTI_EXT_CFG_BOOL("zic64b", ext_zic64b, true), /* @@ -2237,8 +2237,6 @@ static RISCVCPUProfile RVA22U64 = { * Other named features that we already implement: Sstvecd, Sstvala, * Sscounterenw * - * Named features that we need to enable: svade - * * The remaining features/extensions comes from RVA22U64. */ static RISCVCPUProfile RVA22S64 = { @@ -2250,10 +2248,7 @@ static RISCVCPUProfile RVA22S64 = { .ext_offsets = { /* rva22s64 exts */ CPU_CFG_OFFSET(ext_zifencei), CPU_CFG_OFFSET(ext_svpbmt), - CPU_CFG_OFFSET(ext_svinval), - - /* rva22s64 named features */ - CPU_CFG_OFFSET(ext_svade), + CPU_CFG_OFFSET(ext_svinval), CPU_CFG_OFFSET(ext_svade), RISCV_PROFILE_EXT_LIST_END } diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c index ccfb7b2dd3f..ab6db817dbd 100644 --- a/target/riscv/tcg/tcg-cpu.c +++ b/target/riscv/tcg/tcg-cpu.c @@ -1282,6 +1282,12 @@ static void riscv_init_max_cpu_extensions(Object *obj) isa_ext_update_enabled(cpu, prop->offset, true); } + /* + * Some extensions can't be added without backward compatibilty concerns. + * Disable those, the user can still opt in to them on the command line. + */ + cpu->cfg.ext_svade = false; + /* set vector version */ env->vext_ver = VEXT_VERSION_1_00_0; -- 2.39.5