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memory: make section size a 128-bit integer

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So far, the size of all regions passed to listeners could fit in 64 bits,
because artificial regions (containers and aliases) are eliminated by
the memory core, leaving only device regions which have reasonable sizes

An IOMMU however cannot be eliminated by the memory core, and may have
an artificial size, hence we may need 65 bits to represent its size.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-05-27 10:08:27 +02:00
parent 733d5ef527
commit 052e87b073
15 changed files with 85 additions and 52 deletions
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19
include/qemu/int128.h
View file

@ -34,6 +34,25 @@ static inline Int128 int128_2_64(void)
return (Int128) { 0, 1 };
}
static inline Int128 int128_and(Int128 a, Int128 b)
{
return (Int128) { a.lo & b.lo, a.hi & b.hi };
}
static inline Int128 int128_rshift(Int128 a, int n)
{
int64_t h;
if (!n) {
return a;
}
h = a.hi >> (n & 63);
if (n >= 64) {
return (Int128) { h, h >> 63 };
} else {
return (Int128) { (a.lo >> n) | (a.hi << (64 - n)), h };
}
}
static inline Int128 int128_add(Int128 a, Int128 b)
{
Int128 r = { a.lo + b.lo, a.hi + b.hi };