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| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2014-05-27 15:36:30 +1000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-06-16 13:24:39 +0200 |
| commit | da95324ebe462b14a3507af02eb4a689c8a1619f (patch) | |
| tree | 246278f453437fa1e744a1c02869710006554c74 /target-ppc | |
| parent | a1d59c0ffadf17d546f53f4bda06e8adcf616ede (diff) | |
| download | hqemu-da95324ebe462b14a3507af02eb4a689c8a1619f.zip hqemu-da95324ebe462b14a3507af02eb4a689c8a1619f.tar.gz | |
spapr_iommu: Enable multiple TCE requests
Currently only single TCE entry per request is supported (H_PUT_TCE).
However PAPR+ specification allows multiple entry requests such as
H_PUT_TCE_INDIRECT and H_STUFF_TCE. Having less transitions to the host
kernel via ioctls, support of these calls can accelerate IOMMU operations.
This implements H_STUFF_TCE and H_PUT_TCE_INDIRECT.
This advertises "multi-tce" capability to the guest if the host kernel
supports it (KVM_CAP_SPAPR_MULTITCE) or guest is running in TCG mode.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc')
| -rw-r--r-- | target-ppc/kvm.c | 7 | ||||
| -rw-r--r-- | target-ppc/kvm_ppc.h | 6 |
2 files changed, 13 insertions, 0 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index 05952d0..2b2e35f 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -62,6 +62,7 @@ static int cap_booke_sregs; static int cap_ppc_smt; static int cap_ppc_rma; static int cap_spapr_tce; +static int cap_spapr_multitce; static int cap_hior; static int cap_one_reg; static int cap_epr; @@ -98,6 +99,7 @@ int kvm_arch_init(KVMState *s) cap_ppc_smt = kvm_check_extension(s, KVM_CAP_PPC_SMT); cap_ppc_rma = kvm_check_extension(s, KVM_CAP_PPC_RMA); cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE); + cap_spapr_multitce = kvm_check_extension(s, KVM_CAP_SPAPR_MULTITCE); cap_one_reg = kvm_check_extension(s, KVM_CAP_ONE_REG); cap_hior = kvm_check_extension(s, KVM_CAP_PPC_HIOR); cap_epr = kvm_check_extension(s, KVM_CAP_PPC_EPR); @@ -1613,6 +1615,11 @@ uint64_t kvmppc_rma_size(uint64_t current_size, unsigned int hash_shift) } #endif +bool kvmppc_spapr_use_multitce(void) +{ + return cap_spapr_multitce; +} + void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t window_size, int *pfd) { struct kvm_create_spapr_tce args = { diff --git a/target-ppc/kvm_ppc.h b/target-ppc/kvm_ppc.h index 716c33d..98aa641 100644 --- a/target-ppc/kvm_ppc.h +++ b/target-ppc/kvm_ppc.h @@ -32,6 +32,7 @@ int kvmppc_set_tcr(PowerPCCPU *cpu); int kvmppc_booke_watchdog_enable(PowerPCCPU *cpu); #ifndef CONFIG_USER_ONLY off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem); +bool kvmppc_spapr_use_multitce(void); void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t window_size, int *pfd); int kvmppc_remove_spapr_tce(void *table, int pfd, uint32_t window_size); int kvmppc_reset_htab(int shift_hint); @@ -136,6 +137,11 @@ static inline off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem) return 0; } +static inline bool kvmppc_spapr_use_multitce(void) +{ + return false; +} + static inline void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t window_size, int *fd) { |
