Re: [PATCH v2 48/54] target/sparc: Convert to TCGCPUOps.tlb_fill_align

[Pierrick Bouvier <pierrick.bouvier@linaro.org>]

On 11/14/24 08:01, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   target/sparc/cpu.h        |  8 ++++---
>   target/sparc/cpu.c        |  2 +-
>   target/sparc/mmu_helper.c | 44 +++++++++++++++++++++++++--------------
>   3 files changed, 34 insertions(+), 20 deletions(-)
> 
> diff --git a/target/sparc/cpu.h b/target/sparc/cpu.h
> index f517e5a383..4c8927e9fa 100644
> --- a/target/sparc/cpu.h
> +++ b/target/sparc/cpu.h
> @@ -4,6 +4,7 @@
>   #include "qemu/bswap.h"
>   #include "cpu-qom.h"
>   #include "exec/cpu-defs.h"
> +#include "exec/memop.h"
>   #include "qemu/cpu-float.h"
>   
>   #if !defined(TARGET_SPARC64)
> @@ -596,9 +597,10 @@ G_NORETURN void cpu_raise_exception_ra(CPUSPARCState *, int, uintptr_t);
>   void cpu_sparc_set_id(CPUSPARCState *env, unsigned int cpu);
>   void sparc_cpu_list(void);
>   /* mmu_helper.c */
> -bool sparc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
> -                        MMUAccessType access_type, int mmu_idx,
> -                        bool probe, uintptr_t retaddr);
> +bool sparc_cpu_tlb_fill_align(CPUState *cs, CPUTLBEntryFull *out,
> +                              vaddr addr, MMUAccessType access_type,
> +                              int mmu_idx, MemOp memop, int size,
> +                              bool probe, uintptr_t retaddr);
>   target_ulong mmu_probe(CPUSPARCState *env, target_ulong address, int mmulev);
>   void dump_mmu(CPUSPARCState *env);
>   
> diff --git a/target/sparc/cpu.c b/target/sparc/cpu.c
> index dd7af86de7..57ae53bd71 100644
> --- a/target/sparc/cpu.c
> +++ b/target/sparc/cpu.c
> @@ -932,7 +932,7 @@ static const TCGCPUOps sparc_tcg_ops = {
>       .restore_state_to_opc = sparc_restore_state_to_opc,
>   
>   #ifndef CONFIG_USER_ONLY
> -    .tlb_fill = sparc_cpu_tlb_fill,
> +    .tlb_fill_align = sparc_cpu_tlb_fill_align,
>       .cpu_exec_interrupt = sparc_cpu_exec_interrupt,
>       .cpu_exec_halt = sparc_cpu_has_work,
>       .do_interrupt = sparc_cpu_do_interrupt,
> diff --git a/target/sparc/mmu_helper.c b/target/sparc/mmu_helper.c
> index 9ff06026b8..32766a37d6 100644
> --- a/target/sparc/mmu_helper.c
> +++ b/target/sparc/mmu_helper.c
> @@ -203,12 +203,12 @@ static int get_physical_address(CPUSPARCState *env, CPUTLBEntryFull *full,
>   }
>   
>   /* Perform address translation */
> -bool sparc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
> -                        MMUAccessType access_type, int mmu_idx,
> -                        bool probe, uintptr_t retaddr)
> +bool sparc_cpu_tlb_fill_align(CPUState *cs, CPUTLBEntryFull *out,
> +                              vaddr address, MMUAccessType access_type,
> +                              int mmu_idx, MemOp memop, int size,
> +                              bool probe, uintptr_t retaddr)
>   {
>       CPUSPARCState *env = cpu_env(cs);
> -    CPUTLBEntryFull full = {};
>       target_ulong vaddr;
>       int error_code = 0, access_index;
>   
> @@ -220,16 +220,21 @@ bool sparc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
>        */
>       assert(!probe);
>   
> +    if (address & ((1 << memop_alignment_bits(memop)) - 1)) {
> +        sparc_cpu_do_unaligned_access(cs, address, access_type,
> +                                      mmu_idx, retaddr);
> +    }
> +
> +    memset(out, 0, sizeof(*out));
>       address &= TARGET_PAGE_MASK;
> -    error_code = get_physical_address(env, &full, &access_index,
> +    error_code = get_physical_address(env, out, &access_index,
>                                         address, access_type, mmu_idx);
>       vaddr = address;
>       if (likely(error_code == 0)) {
>           qemu_log_mask(CPU_LOG_MMU,
>                         "Translate at %" VADDR_PRIx " -> "
>                         HWADDR_FMT_plx ", vaddr " TARGET_FMT_lx "\n",
> -                      address, full.phys_addr, vaddr);
> -        tlb_set_page_full(cs, mmu_idx, vaddr, &full);
> +                      address, out->phys_addr, vaddr);
>           return true;
>       }
>   
> @@ -244,8 +249,7 @@ bool sparc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
>              permissions. If no mapping is available, redirect accesses to
>              neverland. Fake/overridden mappings will be flushed when
>              switching to normal mode. */
> -        full.prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
> -        tlb_set_page_full(cs, mmu_idx, vaddr, &full);
> +        out->prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
>           return true;
>       } else {
>           if (access_type == MMU_INST_FETCH) {
> @@ -754,22 +758,30 @@ static int get_physical_address(CPUSPARCState *env, CPUTLBEntryFull *full,
>   }
>   
>   /* Perform address translation */
> -bool sparc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
> -                        MMUAccessType access_type, int mmu_idx,
> -                        bool probe, uintptr_t retaddr)
> +bool sparc_cpu_tlb_fill_align(CPUState *cs, CPUTLBEntryFull *out,
> +                              vaddr address, MMUAccessType access_type,
> +                              int mmu_idx, MemOp memop, int size,
> +                              bool probe, uintptr_t retaddr)
>   {
>       CPUSPARCState *env = cpu_env(cs);
> -    CPUTLBEntryFull full = {};
>       int error_code = 0, access_index;
>   
> +    if (address & ((1 << memop_alignment_bits(memop)) - 1)) {
> +        if (probe) {
> +            return false;
> +        }
> +        sparc_cpu_do_unaligned_access(cs, address, access_type,
> +                                      mmu_idx, retaddr);
> +    }
> +
> +    memset(out, 0, sizeof(*out));
>       address &= TARGET_PAGE_MASK;
> -    error_code = get_physical_address(env, &full, &access_index,
> +    error_code = get_physical_address(env, out, &access_index,
>                                         address, access_type, mmu_idx);
>       if (likely(error_code == 0)) {
> -        trace_mmu_helper_mmu_fault(address, full.phys_addr, mmu_idx, env->tl,
> +        trace_mmu_helper_mmu_fault(address, out->phys_addr, mmu_idx, env->tl,
>                                      env->dmmu.mmu_primary_context,
>                                      env->dmmu.mmu_secondary_context);
> -        tlb_set_page_full(cs, mmu_idx, address, &full);
>           return true;
>       }
>       if (probe) {

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>