On 18.01.21 04:51, [email protected] wrote: > On Sat, Jan 16, 2021 at 2:43 AM Wesley Zhao > <[email protected]> wrote: > >> > >> I was trying to reserve some memory to save logs incase that > Android panic or hang and then > >> I can read the logs from QNX side from the memory reserved before > on the Qualcomm 8155 hypervisor platform, > >> and I find the "reserve=" parameter only support 32bit,so I made > some change and send these patches. > > > >See Documentation/admin-guide/kernel-parameters.txt > > > > memmap=nn[KMG]$ss[KMG] > > [KNL,ACPI] Mark specific memory as reserved. > > Region of memory to be reserved is from ss > to ss+nn. > > Example: Exclude memory from > 0x18690000-0x1869ffff > > memmap=64K$0x18690000 > > or > > memmap=0x10000$0x18690000 > > Some bootloaders may need an escape character > >before '$', > > like Grub2, otherwise '$' and the following > number > > will be eaten. > Sorry，what is your point： > static int __init reserve_setup(char *str) > static struct resource reserve[MAXRESERVE]; > for (;;) { > unsigned int io_start, io_num;* // these code is not compatible > with 64bit，i start from here* >
Dan's point is that you should look into using "memmap=" instead of "reserve=". -- Thanks, David / dhildenb
