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KVM: PPC: Book3S: Add count cache flush parameters to kvmppc_get_cpu_char()

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Add KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST &
KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE to the characteristics returned
from the H_GET_CPU_CHARACTERISTICS H-CALL, as queried from either the
hypervisor or the device tree.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Suraj Jitindar Singh 2019-03-01 14:25:16 +11:00 committed by Paul Mackerras
parent e74d53e30e
commit 2b57ecd020
2 changed files with 16 additions and 4 deletions
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2
arch/powerpc/include/uapi/asm/kvm.h
View File

@ -463,10 +463,12 @@ struct kvm_ppc_cpu_char {
#define KVM_PPC_CPU_CHAR_BR_HINT_HONOURED (1ULL << 58)
#define KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF (1ULL << 57)
#define KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS (1ULL << 56)
#define KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST (1ull << 54)
#define KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY (1ULL << 63)
#define KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR (1ULL << 62)
#define KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR (1ULL << 61)
#define KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE (1ull << 58)
/* Per-vcpu XICS interrupt controller state */
#define KVM_REG_PPC_ICP_STATE (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x8c)

18
arch/powerpc/kvm/powerpc.c
View File

@ -2189,10 +2189,12 @@ static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
}
return 0;
}
@ -2251,12 +2253,16 @@ static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
if (have_fw_feat(fw_features, "enabled",
"fw-count-cache-disabled"))
cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
if (have_fw_feat(fw_features, "enabled",
"fw-count-cache-flush-bcctr2,0,0"))
cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
if (have_fw_feat(fw_features, "enabled",
"speculation-policy-favor-security"))
@ -2267,9 +2273,13 @@ static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
if (!have_fw_feat(fw_features, "disabled",
"needs-spec-barrier-for-bound-checks"))
cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
if (have_fw_feat(fw_features, "enabled",
"needs-count-cache-flush-on-context-switch"))
cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
of_node_put(fw_features);
}