diff options
| author | Juergen Gross <jgross@suse.com> | 2022-06-30 10:14:39 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-07-01 11:57:52 +0300 |
| commit | 96e8fc5818686d4a1591bb6907e7fdb64ef29884 (patch) | |
| tree | 52cac6393567e532ed0bf7aa5ceafbeebe5b1b52 /arch/x86/xen/enlighten_pv.c | |
| parent | 03c765b0e3b4cb5063276b086c76f7a612856a9a (diff) | |
| download | linux-96e8fc5818686d4a1591bb6907e7fdb64ef29884.tar.xz | |
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/enlighten_pv.c')
| -rw-r--r-- | arch/x86/xen/enlighten_pv.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index e3297b15701c..70fb2ea85e90 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -1183,15 +1183,19 @@ static void __init xen_domu_set_legacy_features(void) extern void early_xen_iret_patch(void); /* First C function to be called on Xen boot */ -asmlinkage __visible void __init xen_start_kernel(void) +asmlinkage __visible void __init xen_start_kernel(struct start_info *si) { struct physdev_set_iopl set_iopl; unsigned long initrd_start = 0; int rc; - if (!xen_start_info) + if (!si) return; + clear_bss(); + + xen_start_info = si; + __text_gen_insn(&early_xen_iret_patch, JMP32_INSN_OPCODE, &early_xen_iret_patch, &xen_iret, JMP32_INSN_SIZE); |