On Tue, Oct 16, 2018 at 09:11:14PM +0200, Borislav Petkov wrote: > On Tue, Oct 16, 2018 at 11:13:54AM -0400, Masayoshi Mizuma wrote: > > Hi Boris, Baoquan and all, > > > > I have created a RFC patch for adjust KASLR padding size. > > This patch is based on Can's v8 patch [1/3], and the Can's patch > > will be changed in the future, so this patch is just RFC. > > > > Welcome to any comments and suggestions. Thanks! > > ... > > > diff --git a/arch/x86/include/uapi/asm/bootparam.h > > b/arch/x86/include/uapi/asm/bootparam.h > > index a06cbf019744..c987c725e93a 100644 > > --- a/arch/x86/include/uapi/asm/bootparam.h > > +++ b/arch/x86/include/uapi/asm/bootparam.h > > @@ -191,7 +191,8 @@ struct boot_params { > > __u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)]; > > __u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */ > > struct boot_e820_entry e820_table[E820_MAX_ENTRIES_ZEROPAGE]; /* 0x2d0 > > */ > > - __u8 _pad8[48]; /* 0xcd0 */ > > + __u8 _pad8[40]; /* 0xcd0 */ > > + __u64 possible_mem_addr; /* 0xcf8 */ > > Where in the example I gave you with add_e820ext() do you see members > being added to struct boot_params? > > Take a look at it again pls.
Ah, sorry, I misunderstood your suggetion... In parse_setup_data(), the data is picked up from boot_params, so I thought it is also useful for this sitiation. I'll try again, thanks! - Masa