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Re: [qemu-s390x] [Qemu-devel] [PATCH v1 3/9] tcg: Factor out CONFIG_USER

From: Richard Henderson
Subject: Re: [qemu-s390x] [Qemu-devel] [PATCH v1 3/9] tcg: Factor out CONFIG_USER_ONLY probe_write() from s390x code
Date: Fri, 23 Aug 2019 08:22:43 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

On 8/23/19 3:07 AM, David Hildenbrand wrote:
> +void probe_write(CPUArchState *env, target_ulong addr, int size, int mmu_idx,
> +                 uintptr_t retaddr)
> +{
> +    CPUState *cpu = env_cpu(env);
> +    CPUClass *cc;
> +
> +    if (!guest_addr_valid(addr) ||
> +        (size > 0 && !guest_addr_valid(addr + size - 1)) ||

I think the interface needs to remain the same between softmmu and linux-user,
and we should not allow size to cross a page here either.  Which also means
that the second line here can go away -- we only need the one test vs the
single page.


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