diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2026-05-29 07:32:41 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2026-06-01 16:35:33 +0000 |
| commit | 606d3cb1be5fd594c1f51addd063e7c13e16bdbc (patch) | |
| tree | c79ad72d3035e2fffe4a3ec10c95395cc16e3163 | |
| parent | 72e34b3e3907d5fd63abf7b2246cae80641769b3 (diff) | |
amd64: do not switch back and restore UEFI IDT in wrmsr_early_safe_end()
The memory where the pre-OS IDT was located might be already consumed by
kernel.
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D57321
| -rw-r--r-- | sys/amd64/amd64/machdep.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c index 79bef08f8a64..ab9edfe2c68f 100644 --- a/sys/amd64/amd64/machdep.c +++ b/sys/amd64/amd64/machdep.c @@ -1827,7 +1827,6 @@ clear_pcb_flags(struct pcb *pcb, const u_int flags) } extern const char wrmsr_early_safe_gp_handler[]; -static struct region_descriptor wrmsr_early_safe_orig_efi_idt; void wrmsr_early_safe_start(void) @@ -1836,7 +1835,6 @@ wrmsr_early_safe_start(void) struct gate_descriptor *gpf_descr; int i; - sidt(&wrmsr_early_safe_orig_efi_idt); efi_idt.rd_limit = 32 * sizeof(idt0[0]); efi_idt.rd_base = (uintptr_t)idt0; lidt(&efi_idt); @@ -1857,12 +1855,6 @@ wrmsr_early_safe_start(void) void wrmsr_early_safe_end(void) { - int i; - - lidt(&wrmsr_early_safe_orig_efi_idt); - - for (i = 0; i < 32; i++) - memset_early(&idt0[i], 0, sizeof(idt0[0])); } int |