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HV: add a specific stack space used in CPU booting

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The original stack used in CPU booting is: ld_bss_end + 4KB;
which could be out of the RAM size limit defined in link_ram file.

So add a specific stack space in link_ram file, and used in
CPU booting.

Tracked-On: #4738
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Reviewed by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Minggui Cao 2020-04-28 15:31:21 +08:00 committed by wenlingz
parent 5936bf431c
commit 691a0e2e56
2 changed files with 10 additions and 4 deletions
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6
hypervisor/arch/x86/boot/cpu_primary.S
View File

@ -237,10 +237,8 @@ cpu_primary_start_64:
primary_start_long_mode:
/* Initialize temporary stack pointer */
lea ld_bss_end(%rip), %rsp
/*0x1000 = PAGE_SIZE*/
add $0x1000,%rsp
/* Initialize temporary stack pointer, size = 0x1000 */
lea stack_for_boot(%rip), %rsp
/* 16 = CPU_STACK_ALIGN */
and $(~(16 - 1)),%rsp

8
hypervisor/bsp/ld/link_ram.ld.in
View File

@ -71,6 +71,14 @@ SECTIONS
} > ram
.boot_stack :
{
/* 4K for the boot stack */
. += 4096;
stack_for_boot = .;
. = ALIGN(4);
} > ram
.bss_noinit (NOLOAD):
{
. = ALIGN(4) ;