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target/sparc: remove MemoryRegionSection check code from sparc_cpu_get_phys_page_debug()

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This code is preventing the MMU debug code from displaying virtual
mappings of IO devices (anything that is not located in the RAM).

Before this patch, Qemu would output 0xffffffffffffffff (-1) as the
physical address corresponding to an IO device virtual address.

With this patch the intended physical address is displayed.

Backports commit 7e450a8f50ac12fc8f69b6ce555254c84efcf407 from qemu
This commit is contained in:
Jean-Christophe Dubois 2018-03-06 08:42:03 -05:00 committed by Lioncash
parent 13e1357dbf
commit 0a43963f3b
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 0 additions and 6 deletions
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6
qemu/target/sparc/mmu_helper.c
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@ -849,18 +849,12 @@ hwaddr sparc_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
CPUSPARCState *env = &cpu->env; CPUSPARCState *env = &cpu->env;
hwaddr phys_addr; hwaddr phys_addr;
int mmu_idx = cpu_mmu_index(env, false); int mmu_idx = cpu_mmu_index(env, false);
MemoryRegionSection section;
if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 2, mmu_idx) != 0) { if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 2, mmu_idx) != 0) {
if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 0, mmu_idx) != 0) { if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 0, mmu_idx) != 0) {
return -1; return -1;
} }
} }
section = memory_region_find(get_system_memory(cs->uc), phys_addr, 1);
memory_region_unref(section.mr);
if (!int128_nz(section.size)) {
return -1;
}
return phys_addr; return phys_addr;
} }
#endif #endif