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i386/pc: handle unitialized mr in pc_get_cxl_range_end() 

Remove pc_get_cxl_range_end() dependency on the CXL memory region,
and replace with one that does not require the CXL host_mr to determine
the start of CXL start.

This in preparation to allow pc_pci_hole64_start() to be called early
in pc_memory_init(), handle CXL memory region end when its underlying
memory region isn't yet initialized.

Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Message-Id: <20220719170014.27028-8-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
This commit is contained in:
Joao Martins 2022-07-19 18:00:10 +01:00 committed by Michael S. Tsirkin
parent 42bed07127
commit 1065b21993
1 changed files with 8 additions and 10 deletions
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18
hw/i386/pc.c
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@ -843,17 +843,15 @@ static uint64_t pc_get_cxl_range_start(PCMachineState *pcms)
static uint64_t pc_get_cxl_range_end(PCMachineState *pcms)
{
uint64_t start = 0;
uint64_t start = pc_get_cxl_range_start(pcms) + MiB;
if (pcms->cxl_devices_state.host_mr.addr) {
start = pcms->cxl_devices_state.host_mr.addr +
memory_region_size(&pcms->cxl_devices_state.host_mr);
if (pcms->cxl_devices_state.fixed_windows) {
GList *it;
for (it = pcms->cxl_devices_state.fixed_windows; it; it = it->next) {
CXLFixedWindow *fw = it->data;
start = fw->mr.addr + memory_region_size(&fw->mr);
}
if (pcms->cxl_devices_state.fixed_windows) {
GList *it;
start = ROUND_UP(start, 256 * MiB);
for (it = pcms->cxl_devices_state.fixed_windows; it; it = it->next) {
CXLFixedWindow *fw = it->data;
start += fw->size;
}
}