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| author | Peter Maydell <peter.maydell@linaro.org> | 2018-03-09 17:09:44 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-03-09 17:09:44 +0000 |
| commit | bab52d4bba3f22921a690a887b4bd0342f2754cd (patch) | |
| tree | f3a9bf5ba7042c7726612047bfb296fa9006b220 /target/arm/cpu64.c | |
| parent | 86f0a186d6f05c429e982628fe5a2aa7ea1e2724 (diff) | |
| download | qemu-bab52d4bba3f22921a690a887b4bd0342f2754cd.tar.gz | |
target/arm: Add "-cpu max" support
Add support for "-cpu max" for ARM guests. This CPU type behaves
like "-cpu host" when KVM is enabled, and like a system CPU with
the maximum possible feature set otherwise. (Note that this means
it won't be migratable across versions, as we will likely add
features to it in future.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20180308130626.12393-4-peter.maydell@linaro.org
Diffstat (limited to 'target/arm/cpu64.c')
| -rw-r--r-- | target/arm/cpu64.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index f12a485820..89b2f4eaed 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -28,6 +28,7 @@ #include "hw/arm/arm.h" #include "sysemu/sysemu.h" #include "sysemu/kvm.h" +#include "kvm_arm.h" static inline void set_feature(CPUARMState *env, int feature) { @@ -214,6 +215,25 @@ static void aarch64_a53_initfn(Object *obj) define_arm_cp_regs(cpu, cortex_a57_a53_cp_reginfo); } +/* -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; + * this only needs to handle 64 bits. + */ +static void aarch64_max_initfn(Object *obj) +{ + ARMCPU *cpu = ARM_CPU(obj); + + if (kvm_enabled()) { + kvm_arm_set_cpu_features_from_host(cpu); + } else { + aarch64_a57_initfn(obj); + /* In future we might add feature bits here even if the + * real-world A57 doesn't implement them. + */ + } +} + #ifdef CONFIG_USER_ONLY static void aarch64_any_initfn(Object *obj) { @@ -249,6 +269,7 @@ typedef struct ARMCPUInfo { static const ARMCPUInfo aarch64_cpus[] = { { .name = "cortex-a57", .initfn = aarch64_a57_initfn }, { .name = "cortex-a53", .initfn = aarch64_a53_initfn }, + { .name = "max", .initfn = aarch64_max_initfn }, #ifdef CONFIG_USER_ONLY { .name = "any", .initfn = aarch64_any_initfn }, #endif |