diff options
Diffstat (limited to 'arch/powerpc/include/asm')
-rw-r--r-- | arch/powerpc/include/asm/kvm_book3s.h | 47 | ||||
-rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 26 | ||||
-rw-r--r-- | arch/powerpc/include/asm/reg.h | 2 |
3 files changed, 64 insertions, 11 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index 1f345a0b6ba2..83a9aa3cf689 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -390,4 +390,51 @@ extern int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu); #define SPLIT_HACK_MASK 0xff000000 #define SPLIT_HACK_OFFS 0xfb000000 +/* + * This packs a VCPU ID from the [0..KVM_MAX_VCPU_ID) space down to the + * [0..KVM_MAX_VCPUS) space, using knowledge of the guest's core stride + * (but not its actual threading mode, which is not available) to avoid + * collisions. + * + * The implementation leaves VCPU IDs from the range [0..KVM_MAX_VCPUS) (block + * 0) unchanged: if the guest is filling each VCORE completely then it will be + * using consecutive IDs and it will fill the space without any packing. + * + * For higher VCPU IDs, the packed ID is based on the VCPU ID modulo + * KVM_MAX_VCPUS (effectively masking off the top bits) and then an offset is + * added to avoid collisions. + * + * VCPU IDs in the range [KVM_MAX_VCPUS..(KVM_MAX_VCPUS*2)) (block 1) are only + * possible if the guest is leaving at least 1/2 of each VCORE empty, so IDs + * can be safely packed into the second half of each VCORE by adding an offset + * of (stride / 2). + * + * Similarly, if VCPU IDs in the range [(KVM_MAX_VCPUS*2)..(KVM_MAX_VCPUS*4)) + * (blocks 2 and 3) are seen, the guest must be leaving at least 3/4 of each + * VCORE empty so packed IDs can be offset by (stride / 4) and (stride * 3 / 4). + * + * Finally, VCPU IDs from blocks 5..7 will only be seen if the guest is using a + * stride of 8 and 1 thread per core so the remaining offsets of 1, 5, 3 and 7 + * must be free to use. + * + * (The offsets for each block are stored in block_offsets[], indexed by the + * block number if the stride is 8. For cases where the guest's stride is less + * than 8, we can re-use the block_offsets array by multiplying the block + * number by (MAX_SMT_THREADS / stride) to reach the correct entry.) + */ +static inline u32 kvmppc_pack_vcpu_id(struct kvm *kvm, u32 id) +{ + const int block_offsets[MAX_SMT_THREADS] = {0, 4, 2, 6, 1, 5, 3, 7}; + int stride = kvm->arch.emul_smt_mode; + int block = (id / KVM_MAX_VCPUS) * (MAX_SMT_THREADS / stride); + u32 packed_id; + + if (WARN_ONCE(block >= MAX_SMT_THREADS, "VCPU ID too large to pack")) + return 0; + packed_id = (id % KVM_MAX_VCPUS) + block_offsets[block]; + if (WARN_ONCE(packed_id >= KVM_MAX_VCPUS, "VCPU ID packing failed")) + return 0; + return packed_id; +} + #endif /* __ASM_KVM_BOOK3S_H__ */ diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index fa4efa7e88f7..906bcbdfd2a1 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -42,7 +42,14 @@ #define KVM_USER_MEM_SLOTS 512 #include <asm/cputhreads.h> -#define KVM_MAX_VCPU_ID (threads_per_subcore * KVM_MAX_VCORES) + +#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE +#include <asm/kvm_book3s_asm.h> /* for MAX_SMT_THREADS */ +#define KVM_MAX_VCPU_ID (MAX_SMT_THREADS * KVM_MAX_VCORES) + +#else +#define KVM_MAX_VCPU_ID KVM_MAX_VCPUS +#endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */ #define __KVM_HAVE_ARCH_INTC_INITIALIZED @@ -672,7 +679,7 @@ struct kvm_vcpu_arch { gva_t vaddr_accessed; pgd_t *pgdir; - u8 io_gpr; /* GPR used as IO source/target */ + u16 io_gpr; /* GPR used as IO source/target */ u8 mmio_host_swabbed; u8 mmio_sign_extend; /* conversion between single and double precision */ @@ -688,7 +695,6 @@ struct kvm_vcpu_arch { */ u8 mmio_vsx_copy_nums; u8 mmio_vsx_offset; - u8 mmio_vsx_tx_sx_enabled; u8 mmio_vmx_copy_nums; u8 mmio_vmx_offset; u8 mmio_copy_type; @@ -801,14 +807,14 @@ struct kvm_vcpu_arch { #define KVMPPC_VCPU_BUSY_IN_HOST 2 /* Values for vcpu->arch.io_gpr */ -#define KVM_MMIO_REG_MASK 0x001f -#define KVM_MMIO_REG_EXT_MASK 0xffe0 +#define KVM_MMIO_REG_MASK 0x003f +#define KVM_MMIO_REG_EXT_MASK 0xffc0 #define KVM_MMIO_REG_GPR 0x0000 -#define KVM_MMIO_REG_FPR 0x0020 -#define KVM_MMIO_REG_QPR 0x0040 -#define KVM_MMIO_REG_FQPR 0x0060 -#define KVM_MMIO_REG_VSX 0x0080 -#define KVM_MMIO_REG_VMX 0x00c0 +#define KVM_MMIO_REG_FPR 0x0040 +#define KVM_MMIO_REG_QPR 0x0080 +#define KVM_MMIO_REG_FQPR 0x00c0 +#define KVM_MMIO_REG_VSX 0x0100 +#define KVM_MMIO_REG_VMX 0x0180 #define __KVM_HAVE_ARCH_WQP #define __KVM_HAVE_CREATE_DEVICE diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 486b7c83b8c5..e5b314ed054e 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -163,7 +163,7 @@ #define PSSCR_ESL 0x00200000 /* Enable State Loss */ #define PSSCR_SD 0x00400000 /* Status Disable */ #define PSSCR_PLS 0xf000000000000000 /* Power-saving Level Status */ -#define PSSCR_GUEST_VIS 0xf0000000000003ff /* Guest-visible PSSCR fields */ +#define PSSCR_GUEST_VIS 0xf0000000000003ffUL /* Guest-visible PSSCR fields */ #define PSSCR_FAKE_SUSPEND 0x00000400 /* Fake-suspend bit (P9 DD2.2) */ #define PSSCR_FAKE_SUSPEND_LG 10 /* Fake-suspend bit position */ |