* [PATCH] target/arm: Add Kunpeng-920
@ 2020-04-09 12:52 KevinZ
2020-04-09 13:45 ` Peter Maydell
0 siblings, 1 reply; 2+ messages in thread
From: KevinZ @ 2020-04-09 12:52 UTC (permalink / raw)
To: qemu-devel
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HiSilicon Kunpeng-920 CPU is one of the commonly used
data center CPUs, this patch adds it to target.
Signed-off-by: Zhenyu Zheng <zhengzhenyulixi@gmail.com>
---
hw/arm/virt.c | 1 +
target/arm/cpu64.c | 20 ++++++++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 7dc96abf72..8457d9deee 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -197,6 +197,7 @@ static const char *valid_cpus[] = {
ARM_CPU_TYPE_NAME("cortex-a53"),
ARM_CPU_TYPE_NAME("cortex-a57"),
ARM_CPU_TYPE_NAME("cortex-a72"),
+ ARM_CPU_TYPE_NAME("Kunpeng-920"),
ARM_CPU_TYPE_NAME("host"),
ARM_CPU_TYPE_NAME("max"),
};
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 62d36f9e8d..efe1676263 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -253,6 +253,25 @@ static void aarch64_a72_initfn(Object *obj)
define_arm_cp_regs(cpu, cortex_a72_a57_a53_cp_reginfo);
}
+static void aarch64_kunpeng_920_initfn(Object *obj)
+{
+ ARMCPU *cpu = ARM_CPU(obj);
+
+ /*
+ * HiSilicon Kunpeng-920 CPU is similar to cortex-a72,
+ * so first initialize cpu data as cortex-a72 CPU,
+ * and then update the corresponding registers.
+ */
+ aarch64_a72_initfn(obj);
+
+ cpu->midr = 0x480fd010;
+ cpu->ctr = 0x84448004;
+ cpu->isar.id_aa64pfr0 = 0x11001111;
+ cpu->isar.id_aa64dfr0 = 0x110305408;
+ cpu->isar.id_aa64isar0 = 0x10211120;
+ cpu->isar.id_aa64mmfr0 = 0x101125;
+}
+
void arm_cpu_sve_finalize(ARMCPU *cpu, Error **errp)
{
/*
@@ -747,6 +766,7 @@ static const ARMCPUInfo aarch64_cpus[] = {
{ .name = "cortex-a57", .initfn = aarch64_a57_initfn },
{ .name = "cortex-a53", .initfn = aarch64_a53_initfn },
{ .name = "cortex-a72", .initfn = aarch64_a72_initfn },
+ { .name = "Kunpeng-920", .initfn = aarch64_kunpeng_920_initfn},
{ .name = "max", .initfn = aarch64_max_initfn },
{ .name = NULL }
};
--
2.26.0.windows.1
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] target/arm: Add Kunpeng-920
2020-04-09 12:52 [PATCH] target/arm: Add Kunpeng-920 KevinZ
@ 2020-04-09 13:45 ` Peter Maydell
0 siblings, 0 replies; 2+ messages in thread
From: Peter Maydell @ 2020-04-09 13:45 UTC (permalink / raw)
To: KevinZ; +Cc: qemu-devel
On Thu, 9 Apr 2020 at 14:17, KevinZ <zheng.zhenyu@foxmail.com> wrote:
>
> HiSilicon Kunpeng-920 CPU is one of the commonly used
> data center CPUs, this patch adds it to target.
>
> Signed-off-by: Zhenyu Zheng <zhengzhenyulixi@gmail.com>
Could you explain what this provides that you couldn't
get with either -cpu cortex-a72 or -cpu host ?
Also, is there a reference manual/datasheet for
this CPU to check whether we're implementing the
right set of features and ID register values?
thanks
-- PMM
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