From: Alexandre Ghiti Date: Wed, 28 Aug 2024 08:36:51 +0000 (+0200) Subject: target: riscv: Add Svvptc extension support X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5b8764193be027b2298133a819358f636ff53962;p=qemu.git target: riscv: Add Svvptc extension support The Svvptc extension describes a uarch that does not cache invalid TLB entries: that's the case for qemu so there is nothing particular to implement other than the introduction of this extension. Since qemu already exposes Svvptc behaviour, let's enable it by default since it allows to drastically reduce the number of sfence.vma emitted by S-mode. Signed-off-by: Alexandre Ghiti Reviewed-by: Alistair Francis Message-ID: <20240828083651.203861-1-alexghiti@rivosinc.com> Signed-off-by: Alistair Francis --- diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 89bc3955ee..658bdb4ae1 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -197,6 +197,7 @@ const RISCVIsaExtData isa_edata_arr[] = { ISA_EXT_DATA_ENTRY(svinval, PRIV_VERSION_1_12_0, ext_svinval), ISA_EXT_DATA_ENTRY(svnapot, PRIV_VERSION_1_12_0, ext_svnapot), ISA_EXT_DATA_ENTRY(svpbmt, PRIV_VERSION_1_12_0, ext_svpbmt), + ISA_EXT_DATA_ENTRY(svvptc, PRIV_VERSION_1_13_0, ext_svvptc), ISA_EXT_DATA_ENTRY(xtheadba, PRIV_VERSION_1_11_0, ext_xtheadba), ISA_EXT_DATA_ENTRY(xtheadbb, PRIV_VERSION_1_11_0, ext_xtheadbb), ISA_EXT_DATA_ENTRY(xtheadbs, PRIV_VERSION_1_11_0, ext_xtheadbs), @@ -1494,6 +1495,7 @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = { MULTI_EXT_CFG_BOOL("svinval", ext_svinval, false), MULTI_EXT_CFG_BOOL("svnapot", ext_svnapot, false), MULTI_EXT_CFG_BOOL("svpbmt", ext_svpbmt, false), + MULTI_EXT_CFG_BOOL("svvptc", ext_svvptc, true), MULTI_EXT_CFG_BOOL("zicntr", ext_zicntr, true), MULTI_EXT_CFG_BOOL("zihpm", ext_zihpm, true), diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h index 96fe26d4ea..355afedfd3 100644 --- a/target/riscv/cpu_cfg.h +++ b/target/riscv/cpu_cfg.h @@ -81,6 +81,7 @@ struct RISCVCPUConfig { bool ext_svinval; bool ext_svnapot; bool ext_svpbmt; + bool ext_svvptc; bool ext_zdinx; bool ext_zaamo; bool ext_zacas;