On 08/30/19 at 05:47pm, Masayoshi Mizuma wrote: > From: Masayoshi Mizuma <[email protected]> > > Add max_addr field in struct boot_params. max_addr shows the > maximum memory address to be reachable by memory hot-add. > max_addr is set by parsing ACPI SRAT. > > Signed-off-by: Masayoshi Mizuma <[email protected]> > --- > Documentation/x86/zero-page.rst | 4 ++++ > arch/x86/include/uapi/asm/bootparam.h | 2 +- > 2 files changed, 5 insertions(+), 1 deletion(-)
Reviewed-by: Baoquan He <[email protected]> Thanks Baoquan > > diff --git a/Documentation/x86/zero-page.rst b/Documentation/x86/zero-page.rst > index f088f5881..cc3938d68 100644 > --- a/Documentation/x86/zero-page.rst > +++ b/Documentation/x86/zero-page.rst > @@ -19,6 +19,7 @@ Offset/Size Proto Name Meaning > 058/008 ALL tboot_addr Physical address of > tboot shared page > 060/010 ALL ist_info Intel SpeedStep (IST) > BIOS support information > (struct ist_info) > +078/010 ALL max_addr The possible maximum > physical memory address [1]_ > 080/010 ALL hd0_info hd0 disk parameter, > OBSOLETE!! > 090/010 ALL hd1_info hd1 disk parameter, > OBSOLETE!! > 0A0/010 ALL sys_desc_table System description > table (struct sys_desc_table), > @@ -43,3 +44,6 @@ Offset/Size Proto Name Meaning > (array of struct e820_entry) > D00/1EC ALL eddbuf EDD data (array of > struct edd_info) > =========== ===== ======================= > ================================================= > + > +.. [1] max_addr shows the maximum memory address to be reachable by memory > + hot-add. max_addr is set by parsing ACPI SRAT. > diff --git a/arch/x86/include/uapi/asm/bootparam.h > b/arch/x86/include/uapi/asm/bootparam.h > index c895df548..6efad338b 100644 > --- a/arch/x86/include/uapi/asm/bootparam.h > +++ b/arch/x86/include/uapi/asm/bootparam.h > @@ -158,7 +158,7 @@ struct boot_params { > __u64 tboot_addr; /* 0x058 */ > struct ist_info ist_info; /* 0x060 */ > __u64 acpi_rsdp_addr; /* 0x070 */ > - __u8 _pad3[8]; /* 0x078 */ > + __u64 max_addr; /* 0x078 */ > __u8 hd0_info[16]; /* obsolete! */ /* 0x080 */ > __u8 hd1_info[16]; /* obsolete! */ /* 0x090 */ > struct sys_desc_table sys_desc_table; /* obsolete! */ /* 0x0a0 */ > -- > 2.18.1 >
