Re: [Qemu-devel] [PATCH v2 5/7] mips/tcg: Call probe_write() for CONFIG_USER_ONLY as well

[Richard Henderson <richard.henderson@linaro.org>]

Pinging the mips maintainers.

r~

On 8/26/19 12:51 AM, David Hildenbrand wrote:
> Let's call it also for CONFIG_USER_ONLY. While at it, add a FIXME and get
> rid of one local variable.
> 
> MIPS code probably needs a bigger refactoring in regards of
> ensure_writable_pages(), similar to s390x, so for example, watchpoints
> can be handled reliably later. The actually accessed addresses should
> be probed only, not full pages.
> 
> Signed-off-by: David Hildenbrand <david@redhat.com>
> ---
>  target/mips/op_helper.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/target/mips/op_helper.c b/target/mips/op_helper.c
> index 34bcc8d884..08d9a4f9f1 100644
> --- a/target/mips/op_helper.c
> +++ b/target/mips/op_helper.c
> @@ -4537,16 +4537,14 @@ static inline void ensure_writable_pages(CPUMIPSState *env,
>                                           int mmu_idx,
>                                           uintptr_t retaddr)
>  {
> -#if !defined(CONFIG_USER_ONLY)
> -    target_ulong page_addr;
> +    /* FIXME: Probe the actual accesses (pass and use a size) */
>      if (unlikely(MSA_PAGESPAN(addr))) {
>          /* first page */
>          probe_write(env, addr, 0, mmu_idx, retaddr);
>          /* second page */
> -        page_addr = (addr & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
> -        probe_write(env, page_addr, 0, mmu_idx, retaddr);
> +        addr = (addr & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
> +        probe_write(env, addr, 0, mmu_idx, retaddr);
>      }
> -#endif
>  }
>  
>  void helper_msa_st_b(CPUMIPSState *env, uint32_t wd,
>