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[Qemu-devel] [PATCH 13/13] target/arm/kvm: host cpu: Add support for sve
From: |
Andrew Jones |
Subject: |
[Qemu-devel] [PATCH 13/13] target/arm/kvm: host cpu: Add support for sve-vls-map |
Date: |
Sun, 12 May 2019 10:36:24 +0200 |
Allow the host cpu type to enable SVE in guests with the sve-vls-map
cpu property.
Signed-off-by: Andrew Jones <address@hidden>
---
target/arm/cpu.c | 1 +
target/arm/cpu.h | 2 ++
target/arm/cpu64.c | 12 +++++++++---
3 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index ea0e24bba8b6..a5c01ff42c78 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -2222,6 +2222,7 @@ static void arm_host_initfn(Object *obj)
ARMCPU *cpu = ARM_CPU(obj);
kvm_arm_set_cpu_features_from_host(cpu);
+ aarch64_add_sve_vls_map_property(obj);
arm_cpu_post_init(obj);
}
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index f0d0ce759ba8..13731ccb39f3 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -976,11 +976,13 @@ int aarch64_cpu_gdb_write_register(CPUState *cpu, uint8_t
*buf, int reg);
void aarch64_sve_narrow_vq(CPUARMState *env, unsigned vq);
void aarch64_sve_change_el(CPUARMState *env, int old_el,
int new_el, bool el0_a64);
+void aarch64_add_sve_vls_map_property(Object *obj);
#else
static inline void aarch64_sve_narrow_vq(CPUARMState *env, unsigned vq) { }
static inline void aarch64_sve_change_el(CPUARMState *env, int o,
int n, bool a)
{ }
+void aarch64_add_sve_vls_map_property(Object *obj) { }
#endif
target_ulong do_arm_semihosting(CPUARMState *env);
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index 94f3dd5b51e5..3b0b900a4d97 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -310,7 +310,8 @@ static void cpu_set_sve_vls_map(Object *obj, Visitor *v,
const char *name,
error_setg(&err, "SVE vector length map has unsupported lengths");
error_append_hint(&err, "Valid vector lengths in range [1-%d]\n",
ARM_MAX_VQ);
- } else if (cpu->sve_max_vq != ARM_MAX_VQ && cpu->sve_max_vq != -1 &&
+ } else if (cpu->sve_max_vq && cpu->sve_max_vq != ARM_MAX_VQ &&
+ cpu->sve_max_vq != -1 &&
cpu->sve_max_vq != arm_cpu_fls64(cpu->sve_vls_map)) {
/*
* If the user provides both sve-max-vq and sve-vls-map, with
@@ -340,6 +341,12 @@ static void cpu_set_sve_vls_map(Object *obj, Visitor *v,
const char *name,
error_propagate(errp, err);
}
+void aarch64_add_sve_vls_map_property(Object *obj)
+{
+ object_property_add(obj, "sve-vls-map", "uint64", cpu_get_sve_vls_map,
+ cpu_set_sve_vls_map, NULL, NULL, &error_fatal);
+}
+
/* -cpu max: if KVM is enabled, like -cpu host (best possible with this host);
* otherwise, a CPU with as many features enabled as our emulation supports.
* The version of '-cpu max' for qemu-system-arm is defined in cpu.c;
@@ -437,8 +444,7 @@ static void aarch64_max_initfn(Object *obj)
object_property_add(obj, "sve-max-vq", "uint32", cpu_max_get_sve_vq,
cpu_max_set_sve_vq, NULL, NULL, &error_fatal);
- object_property_add(obj, "sve-vls-map", "uint64", cpu_get_sve_vls_map,
- cpu_set_sve_vls_map, NULL, NULL, &error_fatal);
+ aarch64_add_sve_vls_map_property(obj);
}
struct ARMCPUInfo {
--
2.20.1
- [Qemu-devel] [PATCH 00/13] target/arm/kvm: enable SVE in guests, Andrew Jones, 2019/05/12
- [Qemu-devel] [PATCH 01/13] target/arm/kvm64: fix error returns, Andrew Jones, 2019/05/12
- [Qemu-devel] [PATCH 10/13] target/arm/monitor: kvm: only return valid sve vector sets, Andrew Jones, 2019/05/12
- [Qemu-devel] [PATCH 13/13] target/arm/kvm: host cpu: Add support for sve-vls-map,
Andrew Jones <=
- [Qemu-devel] [PATCH 07/13] target/arm/kvm: max cpu: Allow sve max vector length setting, Andrew Jones, 2019/05/12
- [Qemu-devel] [PATCH 04/13] target/arm/kvm: Move the get/put of fpsimd registers out, Andrew Jones, 2019/05/12
- [Qemu-devel] [PATCH 06/13] target/arm/kvm: max cpu: Enable SVE when available, Andrew Jones, 2019/05/12
- [Qemu-devel] [PATCH 02/13] update-linux-headers: Add sve_context.h to asm-arm64, Andrew Jones, 2019/05/12
- [Qemu-devel] [PATCH 09/13] target/arm/kvm: Export kvm_arm_get_sve_vls, Andrew Jones, 2019/05/12
- [Qemu-devel] [PATCH 08/13] target/arm/monitor: Add query-sve-vector-lengths, Andrew Jones, 2019/05/12