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b1b1697ae0
This reverts much of commit c01015091a ("KVM: PPC: Book3S HV: Run HPT
guests on POWER9 radix hosts"), which was required to run HPT guests on
RPT hosts on early POWER9 CPUs without support for "mixed mode", which
meant the host could not run with MMU on while guests were running.
This code has some corner case bugs, e.g., when the guest hits a machine
check or HMI the primary locks up waiting for secondaries to switch LPCR
to host, which they never do. This could all be fixed in software, but
most CPUs in production have mixed mode support, and those that don't
are believed to be all in installations that don't use this capability.
So simplify things and remove support.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Tested-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
163 lines
3.7 KiB
C
163 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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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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};
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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 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[10]; /* MMCR 0,1,A, SIAR, SDAR, MMCR2, SIER, MMCR3, SIER2/3 */
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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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