From fa824d99f9b5c6f5246b8ddc6d7b794d4413e5f4 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Wed, 13 Sep 2023 10:55:59 +0200 Subject: target/hppa: Add BTLB support to hppa TLB functions Change the TLB code to store the Block-TLBs at the beginning of the TLB table. New 4k TLB entries which are added later shall not overwrite any of the BTLB entries. Make sure that when the TLB is cleared by the OS via the ptlbe instruction, the Block-TLBs will not be dropped. Signed-off-by: Helge Deller --- target/hppa/cpu.h | 3 +- target/hppa/int_helper.c | 2 +- target/hppa/mem_helper.c | 87 +++++++++++++++++++++++++++++++++--------------- target/hppa/op_helper.c | 3 +- 4 files changed, 65 insertions(+), 30 deletions(-) diff --git a/target/hppa/cpu.h b/target/hppa/cpu.h index 23852d8..730f352 100644 --- a/target/hppa/cpu.h +++ b/target/hppa/cpu.h @@ -350,7 +350,8 @@ bool hppa_cpu_tlb_fill(CPUState *cs, vaddr address, int size, void hppa_cpu_do_interrupt(CPUState *cpu); bool hppa_cpu_exec_interrupt(CPUState *cpu, int int_req); int hppa_get_physical_address(CPUHPPAState *env, vaddr addr, int mmu_idx, - int type, hwaddr *pphys, int *pprot); + int type, hwaddr *pphys, int *pprot, + hppa_tlb_entry **tlb_entry); extern const MemoryRegionOps hppa_io_eir_ops; extern const VMStateDescription vmstate_hppa_cpu; void hppa_cpu_alarm_timer(void *); diff --git a/target/hppa/int_helper.c b/target/hppa/int_helper.c index bebc732..3ab9934 100644 --- a/target/hppa/int_helper.c +++ b/target/hppa/int_helper.c @@ -154,7 +154,7 @@ void hppa_cpu_do_interrupt(CPUState *cs) vaddr = hppa_form_gva_psw(old_psw, iasq_f, vaddr); t = hppa_get_physical_address(env, vaddr, MMU_KERNEL_IDX, - 0, &paddr, &prot); + 0, &paddr, &prot, NULL); if (t >= 0) { /* We can't re-load the instruction. */ env->cr[CR_IIR] = 0; diff --git a/target/hppa/mem_helper.c b/target/hppa/mem_helper.c index 46c3dca..ea33b58 100644 --- a/target/hppa/mem_helper.c +++ b/target/hppa/mem_helper.c @@ -41,16 +41,24 @@ static hppa_tlb_entry *hppa_find_tlb(CPUHPPAState *env, vaddr addr) return NULL; } -static void hppa_flush_tlb_ent(CPUHPPAState *env, hppa_tlb_entry *ent) +static void hppa_flush_tlb_ent(CPUHPPAState *env, hppa_tlb_entry *ent, + bool force_flush_btlb) { CPUState *cs = env_cpu(env); - unsigned i, n = 1 << (2 * ent->page_size); - uint64_t addr = ent->va_b; + + if (!ent->entry_valid) { + return; + } trace_hppa_tlb_flush_ent(env, ent, ent->va_b, ent->va_e, ent->pa); - for (i = 0; i < n; ++i, addr += TARGET_PAGE_SIZE) { - tlb_flush_page_by_mmuidx(cs, addr, HPPA_MMU_FLUSH_MASK); + tlb_flush_range_by_mmuidx(cs, ent->va_b, + ent->va_e - ent->va_b + 1, + HPPA_MMU_FLUSH_MASK, TARGET_LONG_BITS); + + /* never clear BTLBs, unless forced to do so. */ + if (ent < &env->tlb[HPPA_BTLB_ENTRIES] && !force_flush_btlb) { + return; } memset(ent, 0, sizeof(*ent)); @@ -60,23 +68,35 @@ static void hppa_flush_tlb_ent(CPUHPPAState *env, hppa_tlb_entry *ent) static hppa_tlb_entry *hppa_alloc_tlb_ent(CPUHPPAState *env) { hppa_tlb_entry *ent; - uint32_t i = env->tlb_last; + uint32_t i; + + if (env->tlb_last < HPPA_BTLB_ENTRIES || env->tlb_last >= ARRAY_SIZE(env->tlb)) { + i = HPPA_BTLB_ENTRIES; + env->tlb_last = HPPA_BTLB_ENTRIES + 1; + } else { + i = env->tlb_last; + env->tlb_last++; + } - env->tlb_last = (i == ARRAY_SIZE(env->tlb) - 1 ? 0 : i + 1); ent = &env->tlb[i]; - hppa_flush_tlb_ent(env, ent); + hppa_flush_tlb_ent(env, ent, false); return ent; } int hppa_get_physical_address(CPUHPPAState *env, vaddr addr, int mmu_idx, - int type, hwaddr *pphys, int *pprot) + int type, hwaddr *pphys, int *pprot, + hppa_tlb_entry **tlb_entry) { hwaddr phys; int prot, r_prot, w_prot, x_prot, priv; hppa_tlb_entry *ent; int ret = -1; + if (tlb_entry) { + *tlb_entry = NULL; + } + /* Virtual translation disabled. Direct map virtual to physical. */ if (mmu_idx == MMU_PHYS_IDX) { phys = addr; @@ -93,8 +113,12 @@ int hppa_get_physical_address(CPUHPPAState *env, vaddr addr, int mmu_idx, goto egress; } + if (tlb_entry) { + *tlb_entry = ent; + } + /* We now know the physical address. */ - phys = ent->pa + (addr & ~TARGET_PAGE_MASK); + phys = ent->pa + (addr - ent->va_b); /* Map TLB access_rights field to QEMU protection. */ priv = MMU_IDX_TO_PRIV(mmu_idx); @@ -193,7 +217,7 @@ hwaddr hppa_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) } excp = hppa_get_physical_address(&cpu->env, addr, MMU_KERNEL_IDX, 0, - &phys, &prot); + &phys, &prot, NULL); /* Since we're translating for debugging, the only error that is a hard error is no translation at all. Otherwise, while a real cpu @@ -207,6 +231,7 @@ bool hppa_cpu_tlb_fill(CPUState *cs, vaddr addr, int size, { HPPACPU *cpu = HPPA_CPU(cs); CPUHPPAState *env = &cpu->env; + hppa_tlb_entry *ent; int prot, excp, a_prot; hwaddr phys; @@ -223,7 +248,7 @@ bool hppa_cpu_tlb_fill(CPUState *cs, vaddr addr, int size, } excp = hppa_get_physical_address(env, addr, mmu_idx, - a_prot, &phys, &prot); + a_prot, &phys, &prot, &ent); if (unlikely(excp >= 0)) { if (probe) { return false; @@ -243,7 +268,7 @@ bool hppa_cpu_tlb_fill(CPUState *cs, vaddr addr, int size, phys & TARGET_PAGE_MASK, size, type, mmu_idx); /* Success! Store the translation into the QEMU TLB. */ tlb_set_page(cs, addr & TARGET_PAGE_MASK, phys & TARGET_PAGE_MASK, - prot, mmu_idx, TARGET_PAGE_SIZE); + prot, mmu_idx, TARGET_PAGE_SIZE << (ent ? 2 * ent->page_size : 0)); return true; } @@ -254,11 +279,11 @@ void HELPER(itlba)(CPUHPPAState *env, target_ulong addr, target_ureg reg) int i; /* Zap any old entries covering ADDR; notice empty entries on the way. */ - for (i = 0; i < ARRAY_SIZE(env->tlb); ++i) { + for (i = HPPA_BTLB_ENTRIES; i < ARRAY_SIZE(env->tlb); ++i) { hppa_tlb_entry *ent = &env->tlb[i]; if (ent->va_b <= addr && addr <= ent->va_e) { if (ent->entry_valid) { - hppa_flush_tlb_ent(env, ent); + hppa_flush_tlb_ent(env, ent, false); } if (!empty) { empty = ent; @@ -278,16 +303,8 @@ void HELPER(itlba)(CPUHPPAState *env, target_ulong addr, target_ureg reg) trace_hppa_tlb_itlba(env, empty, empty->va_b, empty->va_e, empty->pa); } -/* Insert (Insn/Data) TLB Protection. Note this is PA 1.1 only. */ -void HELPER(itlbp)(CPUHPPAState *env, target_ulong addr, target_ureg reg) +static void set_access_bits(CPUHPPAState *env, hppa_tlb_entry *ent, target_ureg reg) { - hppa_tlb_entry *ent = hppa_find_tlb(env, addr); - - if (unlikely(ent == NULL)) { - qemu_log_mask(LOG_GUEST_ERROR, "ITLBP not following ITLBA\n"); - return; - } - ent->access_id = extract32(reg, 1, 18); ent->u = extract32(reg, 19, 1); ent->ar_pl2 = extract32(reg, 20, 2); @@ -301,6 +318,19 @@ void HELPER(itlbp)(CPUHPPAState *env, target_ulong addr, target_ureg reg) ent->ar_pl1, ent->ar_type, ent->b, ent->d, ent->t); } +/* Insert (Insn/Data) TLB Protection. Note this is PA 1.1 only. */ +void HELPER(itlbp)(CPUHPPAState *env, target_ulong addr, target_ureg reg) +{ + hppa_tlb_entry *ent = hppa_find_tlb(env, addr); + + if (unlikely(ent == NULL)) { + qemu_log_mask(LOG_GUEST_ERROR, "ITLBP not following ITLBA\n"); + return; + } + + set_access_bits(env, ent, reg); +} + /* Purge (Insn/Data) TLB. This is explicitly page-based, and is synchronous across all processors. */ static void ptlb_work(CPUState *cpu, run_on_cpu_data data) @@ -310,7 +340,7 @@ static void ptlb_work(CPUState *cpu, run_on_cpu_data data) hppa_tlb_entry *ent = hppa_find_tlb(env, addr); if (ent && ent->entry_valid) { - hppa_flush_tlb_ent(env, ent); + hppa_flush_tlb_ent(env, ent, false); } } @@ -334,7 +364,10 @@ void HELPER(ptlb)(CPUHPPAState *env, target_ulong addr) void HELPER(ptlbe)(CPUHPPAState *env) { trace_hppa_tlb_ptlbe(env); - memset(env->tlb, 0, sizeof(env->tlb)); + qemu_log_mask(CPU_LOG_MMU, "FLUSH ALL TLB ENTRIES\n"); + memset(&env->tlb[HPPA_BTLB_ENTRIES], 0, + sizeof(env->tlb) - HPPA_BTLB_ENTRIES * sizeof(env->tlb[0])); + env->tlb_last = HPPA_BTLB_ENTRIES; tlb_flush_by_mmuidx(env_cpu(env), HPPA_MMU_FLUSH_MASK); } @@ -356,7 +389,7 @@ target_ureg HELPER(lpa)(CPUHPPAState *env, target_ulong addr) int prot, excp; excp = hppa_get_physical_address(env, addr, MMU_KERNEL_IDX, 0, - &phys, &prot); + &phys, &prot, NULL); if (excp >= 0) { if (env->psw & PSW_Q) { /* ??? Needs tweaking for hppa64. */ diff --git a/target/hppa/op_helper.c b/target/hppa/op_helper.c index f25a5a7..837e2b3 100644 --- a/target/hppa/op_helper.c +++ b/target/hppa/op_helper.c @@ -179,7 +179,8 @@ target_ureg HELPER(probe)(CPUHPPAState *env, target_ulong addr, return 0; } - excp = hppa_get_physical_address(env, addr, level, 0, &phys, &prot); + excp = hppa_get_physical_address(env, addr, level, 0, &phys, + &prot, NULL); if (excp >= 0) { if (env->psw & PSW_Q) { /* ??? Needs tweaking for hppa64. */ -- cgit v1.1