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hvf: Avoid mapping regions < PAGE_SIZE as ram 

HVF has generic memory listener code that adds all RAM regions as HVF RAM
regions. However, HVF can only handle page aligned, page granule regions.

So let's ignore regions that are not page aligned and sized. They will be
trapped as MMIO instead.

Signed-off-by: Alexander Graf <agraf@csgraf.de>

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211025132147.28308-1-agraf@csgraf.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Alexander Graf 2021-10-25 15:21:47 +02:00 committed by Paolo Bonzini
parent ff66ee5369
commit a443c3e225
1 changed files with 7 additions and 0 deletions
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7
accel/hvf/hvf-accel-ops.c
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@ -122,6 +122,7 @@ static void hvf_set_phys_mem(MemoryRegionSection *section, bool add)
MemoryRegion *area = section->mr;
bool writeable = !area->readonly && !area->rom_device;
hv_memory_flags_t flags;
uint64_t page_size = qemu_real_host_page_size;
if (!memory_region_is_ram(area)) {
if (writeable) {
@ -135,6 +136,12 @@ static void hvf_set_phys_mem(MemoryRegionSection *section, bool add)
}
}
if (!QEMU_IS_ALIGNED(int128_get64(section->size), page_size) ||
!QEMU_IS_ALIGNED(section->offset_within_address_space, page_size)) {
/* Not page aligned, so we can not map as RAM */
add = false;
}
mem = hvf_find_overlap_slot(
section->offset_within_address_space,
int128_get64(section->size));