git: 606d3cb1be5f - main - amd64: do not switch back and restore UEFI IDT in wrmsr_early_safe_end()

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=606d3cb1be5fd594c1f51addd063e7c13e16bdbc

commit 606d3cb1be5fd594c1f51addd063e7c13e16bdbc
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2026-05-29 07:32:41 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2026-06-01 16:35:33 +0000

    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
---
 sys/amd64/amd64/machdep.c | 8 --------
 1 file changed, 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