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target/arm: Report unsupported MPU region sizes more clearly

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Currently our PMSAv7 and ARMv7M MPU implementation cannot handle
MPU region sizes smaller than our TARGET_PAGE_SIZE. However we
report that in a slightly confusing way:

DRSR[3]: No support for MPU (sub)region alignment of 9 bits. Minimum is 10

The problem is not the alignment of the region, but its size;
tweak the error message to say so:
DRSR[3]: No support for MPU (sub)region size of 512 bytes. Minimum is 1024.

Backports commit 8aec759b45fa6986c0b159cb27353d6abb0d5d73 from qemu
This commit is contained in:
Peter Maydell 2018-04-11 19:32:06 -04:00 committed by Lioncash
parent 18e6b1549f
commit 8f26d8e556
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 3 additions and 3 deletions
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6
qemu/target/arm/helper.c
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@ -8874,9 +8874,9 @@ static bool get_phys_addr_pmsav7(CPUARMState *env, uint32_t address,
}
if (rsize < TARGET_PAGE_BITS) {
qemu_log_mask(LOG_UNIMP,
"DRSR[%d]: No support for MPU (sub)region "
"alignment of %" PRIu32 " bits. Minimum is %d\n",
n, rsize, TARGET_PAGE_BITS);
"DRSR[%d]: No support for MPU (sub)region size of"
" %" PRIu32 " bytes. Minimum is %d.\n",
n, (1 << rsize), TARGET_PAGE_SIZE);
continue;
}
if (srdis) {