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| author |  Mayuresh Chitale <mchitale@ventanamicro.com>
| 2023-09-13 22:09:04 +0530 |
|---|---|---|
| committer |  Anup Patel <anup@brainfault.org>
| 2023-10-12 18:44:11 +0530 |
| commit | 81f0f314fec92a69d6c4951b9d9db21d37419669 (patch) | |
| tree | e81ee64f7c2ab6a212e0af29a82cd8bbbac08cc8 | |
| parent | RISCV: KVM: Add senvcfg context save/restore (diff) | |
| download | linux-81f0f314fec92a69d6c4951b9d9db21d37419669.tar.gz linux-81f0f314fec92a69d6c4951b9d9db21d37419669.tar.bz2 linux-81f0f314fec92a69d6c4951b9d9db21d37419669.zip | |
RISCV: KVM: Add sstateen0 context save/restore
Define sstateen0 and add sstateen0 save/restore for guest VCPUs.
Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
| -rw-r--r-- | arch/riscv/include/asm/csr.h | 1 | ||||
| -rw-r--r-- | arch/riscv/include/asm/kvm_host.h | 8 | ||||
| -rw-r--r-- | arch/riscv/kvm/vcpu.c | 12 |
3 files changed, 21 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h index 65b871dbf7e8..306a19a5509c 100644 --- a/arch/riscv/include/asm/csr.h +++ b/arch/riscv/include/asm/csr.h @@ -288,6 +288,7 @@ #define CSR_STVEC 0x105 #define CSR_SCOUNTEREN 0x106 #define CSR_SENVCFG 0x10a +#define CSR_SSTATEEN0 0x10c #define CSR_SSCRATCH 0x140 #define CSR_SEPC 0x141 #define CSR_SCAUSE 0x142 diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 1980be6a3e79..0eefd9c991ae 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -170,6 +170,10 @@ struct kvm_vcpu_config { u64 hstateen0; }; +struct kvm_vcpu_smstateen_csr { + unsigned long sstateen0; +}; + struct kvm_vcpu_arch { /* VCPU ran at least once */ bool ran_atleast_once; @@ -190,6 +194,7 @@ struct kvm_vcpu_arch { unsigned long host_stvec; unsigned long host_scounteren; unsigned long host_senvcfg; + unsigned long host_sstateen0; /* CPU context of Host */ struct kvm_cpu_context host_context; @@ -200,6 +205,9 @@ struct kvm_vcpu_arch { /* CPU CSR context of Guest VCPU */ struct kvm_vcpu_csr guest_csr; + /* CPU Smstateen CSR context of Guest VCPU */ + struct kvm_vcpu_smstateen_csr smstateen_csr; + /* CPU context upon Guest VCPU reset */ struct kvm_cpu_context guest_reset_context; diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c index 3013ae30c3af..c061a1c5fe98 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -621,16 +621,28 @@ static void kvm_riscv_update_hvip(struct kvm_vcpu *vcpu) static __always_inline void kvm_riscv_vcpu_swap_in_guest_state(struct kvm_vcpu *vcpu) { + struct kvm_vcpu_smstateen_csr *smcsr = &vcpu->arch.smstateen_csr; struct kvm_vcpu_csr *csr = &vcpu->arch.guest_csr; + struct kvm_vcpu_config *cfg = &vcpu->arch.cfg; vcpu->arch.host_senvcfg = csr_swap(CSR_SENVCFG, csr->senvcfg); + if (riscv_has_extension_unlikely(RISCV_ISA_EXT_SMSTATEEN) && + (cfg->hstateen0 & SMSTATEEN0_SSTATEEN0)) + vcpu->arch.host_sstateen0 = csr_swap(CSR_SSTATEEN0, + smcsr->sstateen0); } static __always_inline void kvm_riscv_vcpu_swap_in_host_state(struct kvm_vcpu *vcpu) { + struct kvm_vcpu_smstateen_csr *smcsr = &vcpu->arch.smstateen_csr; struct kvm_vcpu_csr *csr = &vcpu->arch.guest_csr; + struct kvm_vcpu_config *cfg = &vcpu->arch.cfg; csr->senvcfg = csr_swap(CSR_SENVCFG, vcpu->arch.host_senvcfg); + if (riscv_has_extension_unlikely(RISCV_ISA_EXT_SMSTATEEN) && + (cfg->hstateen0 & SMSTATEEN0_SSTATEEN0)) + smcsr->sstateen0 = csr_swap(CSR_SSTATEEN0, + vcpu->arch.host_sstateen0); } /* |