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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/powerpc/kvm/e500.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/kvm/e500.h')
-rw-r--r--arch/powerpc/kvm/e500.h339
1 files changed, 339 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/e500.h b/arch/powerpc/kvm/e500.h
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+++ b/arch/powerpc/kvm/e500.h
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+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author: Yu Liu <yu.liu@freescale.com>
+ * Scott Wood <scottwood@freescale.com>
+ * Ashish Kalra <ashish.kalra@freescale.com>
+ * Varun Sethi <varun.sethi@freescale.com>
+ *
+ * Description:
+ * This file is based on arch/powerpc/kvm/44x_tlb.h and
+ * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>,
+ * Copyright IBM Corp. 2007-2008
+ */
+
+#ifndef KVM_E500_H
+#define KVM_E500_H
+
+#include <linux/kvm_host.h>
+#include <asm/nohash/mmu-e500.h>
+#include <asm/tlb.h>
+#include <asm/cputhreads.h>
+
+enum vcpu_ftr {
+ VCPU_FTR_MMU_V2
+};
+
+#define E500_PID_NUM 3
+#define E500_TLB_NUM 2
+
+/* entry is mapped somewhere in host TLB */
+#define E500_TLB_VALID (1 << 31)
+/* TLB1 entry is mapped by host TLB1, tracked by bitmaps */
+#define E500_TLB_BITMAP (1 << 30)
+/* TLB1 entry is mapped by host TLB0 */
+#define E500_TLB_TLB0 (1 << 29)
+/* bits [6-5] MAS2_X1 and MAS2_X0 and [4-0] bits for WIMGE */
+#define E500_TLB_MAS2_ATTR (0x7f)
+
+struct tlbe_ref {
+ kvm_pfn_t pfn; /* valid only for TLB0, except briefly */
+ unsigned int flags; /* E500_TLB_* */
+};
+
+struct tlbe_priv {
+ struct tlbe_ref ref;
+};
+
+#ifdef CONFIG_KVM_E500V2
+struct vcpu_id_table;
+#endif
+
+struct kvmppc_e500_tlb_params {
+ int entries, ways, sets;
+};
+
+struct kvmppc_vcpu_e500 {
+ struct kvm_vcpu vcpu;
+
+ /* Unmodified copy of the guest's TLB -- shared with host userspace. */
+ struct kvm_book3e_206_tlb_entry *gtlb_arch;
+
+ /* Starting entry number in gtlb_arch[] */
+ int gtlb_offset[E500_TLB_NUM];
+
+ /* KVM internal information associated with each guest TLB entry */
+ struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
+
+ struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
+
+ unsigned int gtlb_nv[E500_TLB_NUM];
+
+ unsigned int host_tlb1_nv;
+
+ u32 svr;
+ u32 l1csr0;
+ u32 l1csr1;
+ u32 hid0;
+ u32 hid1;
+ u64 mcar;
+
+ struct page **shared_tlb_pages;
+ int num_shared_tlb_pages;
+
+ u64 *g2h_tlb1_map;
+ unsigned int *h2g_tlb1_rmap;
+
+ /* Minimum and maximum address mapped my TLB1 */
+ unsigned long tlb1_min_eaddr;
+ unsigned long tlb1_max_eaddr;
+
+#ifdef CONFIG_KVM_E500V2
+ u32 pid[E500_PID_NUM];
+
+ /* vcpu id table */
+ struct vcpu_id_table *idt;
+#endif
+};
+
+static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
+{
+ return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
+}
+
+
+/* This geometry is the legacy default -- can be overridden by userspace */
+#define KVM_E500_TLB0_WAY_SIZE 128
+#define KVM_E500_TLB0_WAY_NUM 2
+
+#define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
+#define KVM_E500_TLB1_SIZE 16
+
+#define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
+#define tlbsel_of(index) ((index) >> 16)
+#define esel_of(index) ((index) & 0xFFFF)
+
+#define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
+#define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
+#define MAS2_ATTRIB_MASK \
+ (MAS2_X0 | MAS2_X1 | MAS2_E | MAS2_G)
+#define MAS3_ATTRIB_MASK \
+ (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
+ | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
+
+int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500,
+ ulong value);
+int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu);
+int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu);
+int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea);
+int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea);
+int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea);
+int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500);
+void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);
+
+void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
+int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
+
+int kvmppc_get_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
+ union kvmppc_one_reg *val);
+int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
+ union kvmppc_one_reg *val);
+
+#ifdef CONFIG_KVM_E500V2
+unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500,
+ unsigned int as, unsigned int gid,
+ unsigned int pr, int avoid_recursion);
+#endif
+
+/* TLB helper functions */
+static inline unsigned int
+get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ return (tlbe->mas1 >> 7) & 0x1f;
+}
+
+static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ return tlbe->mas2 & MAS2_EPN;
+}
+
+static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ unsigned int pgsize = get_tlb_size(tlbe);
+ return 1ULL << 10 << pgsize;
+}
+
+static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ u64 bytes = get_tlb_bytes(tlbe);
+ return get_tlb_eaddr(tlbe) + bytes - 1;
+}
+
+static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ return tlbe->mas7_3 & ~0xfffULL;
+}
+
+static inline unsigned int
+get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ return (tlbe->mas1 >> 16) & 0xff;
+}
+
+static inline unsigned int
+get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ return (tlbe->mas1 >> 12) & 0x1;
+}
+
+static inline unsigned int
+get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ return (tlbe->mas1 >> 31) & 0x1;
+}
+
+static inline unsigned int
+get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ return (tlbe->mas1 >> 30) & 0x1;
+}
+
+static inline unsigned int
+get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
+}
+
+static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
+{
+ return vcpu->arch.pid & 0xff;
+}
+
+static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
+{
+ return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
+}
+
+static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
+{
+ return !!(vcpu->arch.shared->msr & MSR_PR);
+}
+
+static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
+{
+ return (vcpu->arch.shared->mas6 >> 16) & 0xff;
+}
+
+static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
+{
+ return vcpu->arch.shared->mas6 & 0x1;
+}
+
+static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
+{
+ /*
+ * Manual says that tlbsel has 2 bits wide.
+ * Since we only have two TLBs, only lower bit is used.
+ */
+ return (vcpu->arch.shared->mas0 >> 28) & 0x1;
+}
+
+static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
+{
+ return vcpu->arch.shared->mas0 & 0xfff;
+}
+
+static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
+{
+ return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
+}
+
+static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
+ const struct kvm_book3e_206_tlb_entry *tlbe)
+{
+ gpa_t gpa;
+
+ if (!get_tlb_v(tlbe))
+ return 0;
+
+#ifndef CONFIG_KVM_BOOKE_HV
+ /* Does it match current guest AS? */
+ /* XXX what about IS != DS? */
+ if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
+ return 0;
+#endif
+
+ gpa = get_tlb_raddr(tlbe);
+ if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
+ /* Mapping is not for RAM. */
+ return 0;
+
+ return 1;
+}
+
+static inline struct kvm_book3e_206_tlb_entry *get_entry(
+ struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry)
+{
+ int offset = vcpu_e500->gtlb_offset[tlbsel];
+ return &vcpu_e500->gtlb_arch[offset + entry];
+}
+
+void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
+ struct kvm_book3e_206_tlb_entry *gtlbe);
+void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500);
+
+#ifdef CONFIG_KVM_BOOKE_HV
+#define kvmppc_e500_get_tlb_stid(vcpu, gtlbe) get_tlb_tid(gtlbe)
+#define get_tlbmiss_tid(vcpu) get_cur_pid(vcpu)
+#define get_tlb_sts(gtlbe) (gtlbe->mas1 & MAS1_TS)
+
+/*
+ * These functions should be called with preemption disabled
+ * and the returned value is valid only in that context
+ */
+static inline int get_thread_specific_lpid(int vm_lpid)
+{
+ int vcpu_lpid = vm_lpid;
+
+ if (threads_per_core == 2)
+ vcpu_lpid |= smp_processor_id() & 1;
+
+ return vcpu_lpid;
+}
+
+static inline int get_lpid(struct kvm_vcpu *vcpu)
+{
+ return get_thread_specific_lpid(vcpu->kvm->arch.lpid);
+}
+#else
+unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu,
+ struct kvm_book3e_206_tlb_entry *gtlbe);
+
+static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+ unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf;
+
+ return vcpu_e500->pid[tidseld];
+}
+
+/* Force TS=1 for all guest mappings. */
+#define get_tlb_sts(gtlbe) (MAS1_TS)
+#endif /* !BOOKE_HV */
+
+static inline bool has_feature(const struct kvm_vcpu *vcpu,
+ enum vcpu_ftr ftr)
+{
+ bool has_ftr;
+ switch (ftr) {
+ case VCPU_FTR_MMU_V2:
+ has_ftr = ((vcpu->arch.mmucfg & MMUCFG_MAVN) == MMUCFG_MAVN_V2);
+ break;
+ default:
+ return false;
+ }
+ return has_ftr;
+}
+
+#endif /* KVM_E500_H */