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| author | Paul Mackerras <paulus@ozlabs.org> | 2018-10-08 08:31:03 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-10-09 08:04:27 +0300 |
| commit | 8e3f5fc1045dc49fd175b978c5457f5f51e7a2ce (patch) | |
| tree | 30480b830d75a477c531f7b68142dc7238fbe0cd /arch/powerpc/include/asm/kvm_book3s.h | |
| parent | f0f825f0e20abe9ba6eb71b7c1eebd891fb4375c (diff) | |
| download | linux-8e3f5fc1045dc49fd175b978c5457f5f51e7a2ce.tar.xz | |
KVM: PPC: Book3S HV: Framework and hcall stubs for nested virtualization
This starts the process of adding the code to support nested HV-style
virtualization. It defines a new H_SET_PARTITION_TABLE hypercall which
a nested hypervisor can use to set the base address and size of a
partition table in its memory (analogous to the PTCR register).
On the host (level 0 hypervisor) side, the H_SET_PARTITION_TABLE
hypercall from the guest is handled by code that saves the virtual
PTCR value for the guest.
This also adds code for creating and destroying nested guests and for
reading the partition table entry for a nested guest from L1 memory.
Each nested guest has its own shadow LPID value, different in general
from the LPID value used by the nested hypervisor to refer to it. The
shadow LPID value is allocated at nested guest creation time.
Nested hypervisor functionality is only available for a radix guest,
which therefore means a radix host on a POWER9 (or later) processor.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/kvm_book3s.h')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index 91c977948828..43f212e38b89 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -274,6 +274,13 @@ static inline void kvmppc_save_tm_sprs(struct kvm_vcpu *vcpu) {} static inline void kvmppc_restore_tm_sprs(struct kvm_vcpu *vcpu) {} #endif +long kvmhv_nested_init(void); +void kvmhv_nested_exit(void); +void kvmhv_vm_nested_init(struct kvm *kvm); +long kvmhv_set_partition_table(struct kvm_vcpu *vcpu); +void kvmhv_set_ptbl_entry(unsigned int lpid, u64 dw0, u64 dw1); +void kvmhv_release_all_nested(struct kvm *kvm); + void kvmppc_giveup_fac(struct kvm_vcpu *vcpu, ulong fac); extern int kvm_irq_bypass; @@ -387,9 +394,6 @@ extern int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu); /* TO = 31 for unconditional trap */ #define INS_TW 0x7fe00008 -/* LPIDs we support with this build -- runtime limit may be lower */ -#define KVMPPC_NR_LPIDS (LPID_RSVD + 1) - #define SPLIT_HACK_MASK 0xff000000 #define SPLIT_HACK_OFFS 0xfb000000 |