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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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8e3f5fc104
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>
186 lines
4.5 KiB
C
186 lines
4.5 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright SUSE Linux Products GmbH 2009
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*
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* Authors: Alexander Graf <agraf@suse.de>
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*/
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#ifndef __ASM_KVM_BOOK3S_ASM_H__
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#define __ASM_KVM_BOOK3S_ASM_H__
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/* XICS ICP register offsets */
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#define XICS_XIRR 4
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#define XICS_MFRR 0xc
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#define XICS_IPI 2 /* interrupt source # for IPIs */
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/* LPIDs we support with this build -- runtime limit may be lower */
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#define KVMPPC_NR_LPIDS (LPID_RSVD + 1)
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/* Maximum number of threads per physical core */
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#define MAX_SMT_THREADS 8
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/* Maximum number of subcores per physical core */
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#define MAX_SUBCORES 4
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#ifdef __ASSEMBLY__
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#ifdef CONFIG_KVM_BOOK3S_HANDLER
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#include <asm/kvm_asm.h>
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.macro DO_KVM intno
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.if (\intno == BOOK3S_INTERRUPT_SYSTEM_RESET) || \
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(\intno == BOOK3S_INTERRUPT_MACHINE_CHECK) || \
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(\intno == BOOK3S_INTERRUPT_DATA_STORAGE) || \
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(\intno == BOOK3S_INTERRUPT_INST_STORAGE) || \
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(\intno == BOOK3S_INTERRUPT_DATA_SEGMENT) || \
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(\intno == BOOK3S_INTERRUPT_INST_SEGMENT) || \
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(\intno == BOOK3S_INTERRUPT_EXTERNAL) || \
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(\intno == BOOK3S_INTERRUPT_EXTERNAL_HV) || \
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(\intno == BOOK3S_INTERRUPT_ALIGNMENT) || \
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(\intno == BOOK3S_INTERRUPT_PROGRAM) || \
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(\intno == BOOK3S_INTERRUPT_FP_UNAVAIL) || \
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(\intno == BOOK3S_INTERRUPT_DECREMENTER) || \
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(\intno == BOOK3S_INTERRUPT_SYSCALL) || \
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(\intno == BOOK3S_INTERRUPT_TRACE) || \
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(\intno == BOOK3S_INTERRUPT_PERFMON) || \
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(\intno == BOOK3S_INTERRUPT_ALTIVEC) || \
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(\intno == BOOK3S_INTERRUPT_VSX)
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b kvmppc_trampoline_\intno
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kvmppc_resume_\intno:
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.endif
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.endm
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#else
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.macro DO_KVM intno
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.endm
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#endif /* CONFIG_KVM_BOOK3S_HANDLER */
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#else /*__ASSEMBLY__ */
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struct kvmppc_vcore;
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/* Struct used for coordinating micro-threading (split-core) mode changes */
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struct kvm_split_mode {
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unsigned long rpr;
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unsigned long pmmar;
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unsigned long ldbar;
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u8 subcore_size;
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u8 do_nap;
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u8 napped[MAX_SMT_THREADS];
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struct kvmppc_vcore *vc[MAX_SUBCORES];
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/* Bits for changing lpcr on P9 */
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unsigned long lpcr_req;
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unsigned long lpidr_req;
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unsigned long host_lpcr;
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u32 do_set;
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u32 do_restore;
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union {
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u32 allphases;
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u8 phase[4];
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} lpcr_sync;
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};
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/*
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* This struct goes in the PACA on 64-bit processors. It is used
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* to store host state that needs to be saved when we enter a guest
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* and restored when we exit, but isn't specific to any particular
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* guest or vcpu. It also has some scratch fields used by the guest
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* exit code.
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*/
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struct kvmppc_host_state {
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ulong host_r1;
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ulong host_r2;
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ulong host_msr;
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ulong vmhandler;
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ulong scratch0;
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ulong scratch1;
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ulong scratch2;
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u8 in_guest;
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u8 restore_hid5;
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u8 napping;
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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u8 hwthread_req;
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u8 hwthread_state;
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u8 host_ipi;
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u8 ptid; /* thread number within subcore when split */
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u8 tid; /* thread number within whole core */
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u8 fake_suspend;
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struct kvm_vcpu *kvm_vcpu;
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struct kvmppc_vcore *kvm_vcore;
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void __iomem *xics_phys;
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void __iomem *xive_tima_phys;
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void __iomem *xive_tima_virt;
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u32 saved_xirr;
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u64 dabr;
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u64 host_mmcr[7]; /* MMCR 0,1,A, SIAR, SDAR, MMCR2, SIER */
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u32 host_pmc[8];
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u64 host_purr;
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u64 host_spurr;
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u64 host_dscr;
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u64 dec_expires;
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struct kvm_split_mode *kvm_split_mode;
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#endif
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#ifdef CONFIG_PPC_BOOK3S_64
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u64 cfar;
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u64 ppr;
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u64 host_fscr;
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#endif
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};
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struct kvmppc_book3s_shadow_vcpu {
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bool in_use;
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ulong gpr[14];
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u32 cr;
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ulong xer;
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ulong ctr;
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ulong lr;
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ulong pc;
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ulong shadow_srr1;
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ulong fault_dar;
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u32 fault_dsisr;
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u32 last_inst;
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#ifdef CONFIG_PPC_BOOK3S_32
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u32 sr[16]; /* Guest SRs */
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struct kvmppc_host_state hstate;
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#endif
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#ifdef CONFIG_PPC_BOOK3S_64
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u8 slb_max; /* highest used guest slb entry */
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struct {
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u64 esid;
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u64 vsid;
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} slb[64]; /* guest SLB */
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u64 shadow_fscr;
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#endif
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};
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#endif /*__ASSEMBLY__ */
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/* Values for kvm_state */
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#define KVM_HWTHREAD_IN_KERNEL 0
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#define KVM_HWTHREAD_IN_IDLE 1
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#define KVM_HWTHREAD_IN_KVM 2
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#endif /* __ASM_KVM_BOOK3S_ASM_H__ */
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