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| author | Tianrui Zhao <zhaotianrui@loongson.cn> | 2023-12-19 05:48:28 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-12-19 05:48:28 +0300 |
| commit | db1ecca22edf27c5a3dd66af406c88b5b5ac7cc1 (patch) | |
| tree | 41c21e4c7fe4ed5f984834f148397e10cca7ae65 /arch/loongarch/include/asm/kvm_host.h | |
| parent | 5b3d524993ff1fb36089be850ccb121ac3296bcf (diff) | |
| download | linux-db1ecca22edf27c5a3dd66af406c88b5b5ac7cc1.tar.xz | |
LoongArch: KVM: Add LSX (128bit SIMD) support
This patch adds LSX (128bit SIMD) support for LoongArch KVM.
There will be LSX exception in KVM when guest use the LSX instructions.
KVM will enable LSX and restore the vector registers for guest and then
return to guest to continue running.
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/asm/kvm_host.h')
| -rw-r--r-- | arch/loongarch/include/asm/kvm_host.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/loongarch/include/asm/kvm_host.h b/arch/loongarch/include/asm/kvm_host.h index 0e89db020481..b0c5cdd8014c 100644 --- a/arch/loongarch/include/asm/kvm_host.h +++ b/arch/loongarch/include/asm/kvm_host.h @@ -95,8 +95,9 @@ enum emulation_result { }; #define KVM_LARCH_FPU (0x1 << 0) -#define KVM_LARCH_SWCSR_LATEST (0x1 << 1) -#define KVM_LARCH_HWCSR_USABLE (0x1 << 2) +#define KVM_LARCH_LSX (0x1 << 1) +#define KVM_LARCH_SWCSR_LATEST (0x1 << 2) +#define KVM_LARCH_HWCSR_USABLE (0x1 << 3) struct kvm_vcpu_arch { /* @@ -178,6 +179,16 @@ static inline void writel_sw_gcsr(struct loongarch_csrs *csr, int reg, unsigned csr->csrs[reg] = val; } +static inline bool kvm_guest_has_fpu(struct kvm_vcpu_arch *arch) +{ + return arch->cpucfg[2] & CPUCFG2_FP; +} + +static inline bool kvm_guest_has_lsx(struct kvm_vcpu_arch *arch) +{ + return arch->cpucfg[2] & CPUCFG2_LSX; +} + /* Debug: dump vcpu state */ int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu); |