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From: Alistair Francis <alistair.francis@opensource.wdc.com>
To: qemu-devel@nongnu.org
Cc: alistair23@gmail.com, Anup Patel <apatel@ventanamicro.com>,
	Frank Chang <frank.chang@sifive.com>,
	Alistair Francis <alistair.francis@wdc.com>,
	Atish Patra <atishp@rivosinc.com>, Bin Meng <bmeng.cn@gmail.com>
Subject: [PULL v2 15/19] target/riscv: Don't force update priv spec version to latest
Date: Sun,  3 Jul 2022 10:12:30 +1000	[thread overview]
Message-ID: <20220703001234.439716-16-alistair.francis@opensource.wdc.com> (raw)
In-Reply-To: <20220703001234.439716-1-alistair.francis@opensource.wdc.com>

From: Anup Patel <apatel@ventanamicro.com>

The riscv_cpu_realize() sets priv spec version to v1.12 when it is
when "env->priv_ver == 0" (i.e. default v1.10) because the enum
value of priv spec v1.10 is zero.

Due to above issue, the sifive_u machine will see priv spec v1.12
instead of priv spec v1.10.

To fix this issue, we set latest priv spec version (i.e. v1.12)
for base rv64/rv32 cpu and riscv_cpu_realize() will override priv
spec version only when "cpu->cfg.priv_spec != NULL".

Fixes: 7100fe6c2441 ("target/riscv: Enable privileged spec version 1.12")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-Id: <20220611080107.391981-2-apatel@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index aac0576fe1..1bb3973806 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -173,6 +173,8 @@ static void rv64_base_cpu_init(Object *obj)
     /* We set this in the realise function */
     set_misa(env, MXL_RV64, 0);
     register_cpu_props(DEVICE(obj));
+    /* Set latest version of privileged specification */
+    set_priv_version(env, PRIV_VERSION_1_12_0);
 }
 
 static void rv64_sifive_u_cpu_init(Object *obj)
@@ -204,6 +206,8 @@ static void rv128_base_cpu_init(Object *obj)
     /* We set this in the realise function */
     set_misa(env, MXL_RV128, 0);
     register_cpu_props(DEVICE(obj));
+    /* Set latest version of privileged specification */
+    set_priv_version(env, PRIV_VERSION_1_12_0);
 }
 #else
 static void rv32_base_cpu_init(Object *obj)
@@ -212,6 +216,8 @@ static void rv32_base_cpu_init(Object *obj)
     /* We set this in the realise function */
     set_misa(env, MXL_RV32, 0);
     register_cpu_props(DEVICE(obj));
+    /* Set latest version of privileged specification */
+    set_priv_version(env, PRIV_VERSION_1_12_0);
 }
 
 static void rv32_sifive_u_cpu_init(Object *obj)
@@ -524,7 +530,7 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
     CPURISCVState *env = &cpu->env;
     RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(dev);
     CPUClass *cc = CPU_CLASS(mcc);
-    int priv_version = 0;
+    int priv_version = -1;
     Error *local_err = NULL;
 
     cpu_exec_realizefn(cs, &local_err);
@@ -548,10 +554,8 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
         }
     }
 
-    if (priv_version) {
+    if (priv_version >= PRIV_VERSION_1_10_0) {
         set_priv_version(env, priv_version);
-    } else if (!env->priv_ver) {
-        set_priv_version(env, PRIV_VERSION_1_12_0);
     }
 
     if (cpu->cfg.mmu) {
-- 
2.36.1



  parent reply	other threads:[~2022-07-03  0:17 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-03  0:12 [PULL v2 00/19] riscv-to-apply queue Alistair Francis
2022-07-03  0:12 ` [PULL v2 01/19] target/riscv: Remove condition guarding register zero for auipc and lui Alistair Francis
2022-07-03  0:12 ` [PULL v2 02/19] target/riscv: Set env->bins in gen_exception_illegal Alistair Francis
2022-07-03  0:12 ` [PULL v2 03/19] target/riscv: Remove generate_exception_mtval Alistair Francis
2022-07-03  0:12 ` [PULL v2 04/19] target/riscv: Minimize the calls to decode_save_opc Alistair Francis
2022-07-03  0:12 ` [PULL v2 05/19] target/riscv/pmp: guard against PMP ranges with a negative size Alistair Francis
2022-07-03  0:12 ` [PULL v2 06/19] target/riscv: Fix PMU CSR predicate function Alistair Francis
2022-07-03  0:12 ` [PULL v2 07/19] target/riscv: Implement PMU CSR predicate function for S-mode Alistair Francis
2022-07-03  0:12 ` [PULL v2 08/19] target/riscv: pmu: Rename the counters extension to pmu Alistair Francis
2022-07-03  0:12 ` [PULL v2 09/19] target/riscv: pmu: Make number of counters configurable Alistair Francis
2022-07-03  0:12 ` [PULL v2 10/19] target/riscv: Implement mcountinhibit CSR Alistair Francis
2022-07-03  0:12 ` [PULL v2 11/19] target/riscv: Add support for hpmcounters/hpmevents Alistair Francis
2022-07-03  0:12 ` [PULL v2 12/19] target/riscv: Support mcycle/minstret write operation Alistair Francis
2022-07-03  0:12 ` [PULL v2 13/19] target/riscv: Fixup MSECCFG minimum priv check Alistair Francis
2022-07-03  0:12 ` [PULL v2 14/19] target/riscv: Ibex: Support priv version 1.11 Alistair Francis
2022-07-03  0:12 ` Alistair Francis [this message]
2022-07-03  0:12 ` [PULL v2 16/19] hw/riscv: boot: Reduce FDT address alignment constraints Alistair Francis
2022-07-03  0:12 ` [PULL v2 17/19] target/riscv: Set minumum priv spec version for mcountinhibit Alistair Francis
2022-07-03  0:12 ` [PULL v2 18/19] target/riscv: Remove CSRs that set/clear an IMSIC interrupt file bits Alistair Francis
2022-07-03  0:12 ` [PULL v2 19/19] target/riscv: Update default priority table for local interrupts Alistair Francis
2022-07-03  4:38 ` [PULL v2 00/19] riscv-to-apply queue Richard Henderson

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