diff options
| author |   Juergen Gross <jgross@suse.com> | 2022-06-30 09:14:39 +0200 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2022-07-01 10:57:52 +0200 |
| commit | 96e8fc5818686d4a1591bb6907e7fdb64ef29884 (patch) | |
| tree | 52cac6393567e532ed0bf7aa5ceafbeebe5b1b52 /arch/x86/xen/xen-head.S | |
| parent | Linux 5.19-rc4 (diff) | |
| download | linux-dev-96e8fc5818686d4a1591bb6907e7fdb64ef29884.tar.xz linux-dev-96e8fc5818686d4a1591bb6907e7fdb64ef29884.zip | |
x86/xen: Use clear_bss() for Xen PV guests
Instead of clearing the bss area in assembly code, use the clear_bss()
function.
This requires to pass the start_info address as parameter to
xen_start_kernel() in order to avoid the xen_start_info being zeroed
again.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20220630071441.28576-2-jgross@suse.com
Diffstat (limited to 'arch/x86/xen/xen-head.S')
| -rw-r--r-- | arch/x86/xen/xen-head.S | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S index 3a2cd93bf059..13af6fe453e3 100644 --- a/arch/x86/xen/xen-head.S +++ b/arch/x86/xen/xen-head.S @@ -48,15 +48,6 @@ SYM_CODE_START(startup_xen) ANNOTATE_NOENDBR cld - /* Clear .bss */ - xor %eax,%eax - mov $__bss_start, %rdi - mov $__bss_stop, %rcx - sub %rdi, %rcx - shr $3, %rcx - rep stosq - - mov %rsi, xen_start_info mov initial_stack(%rip), %rsp /* Set up %gs. @@ -71,6 +62,7 @@ SYM_CODE_START(startup_xen) cdq wrmsr + mov %rsi, %rdi call xen_start_kernel SYM_CODE_END(startup_xen) __FINIT |