git: 617e683319be - stable/14 - efirt: mark dynamic region executing the RT code with the TDP_EFIRT flag

The branch stable/14 has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=617e683319bec099e02301c6f1120fd5d065d3ba

commit 617e683319bec099e02301c6f1120fd5d065d3ba
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2024-11-21 19:40:18 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2024-11-28 12:53:16 +0000

    efirt: mark dynamic region executing the RT code with the TDP_EFIRT flag
    
    For MFC purposes, the TDP_EFIRT flag is moved to td_pflags2.
    
    (cherry picked from commit a03957a706a05bb0c2f627183b19d84f6d96dbb7)
---
 sys/dev/efidev/efirt.c | 8 +++++++-
 sys/sys/proc.h         | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/sys/dev/efidev/efirt.c b/sys/dev/efidev/efirt.c
index 2d45b4d6ac66..92ffeae12734 100644
--- a/sys/dev/efidev/efirt.c
+++ b/sys/dev/efidev/efirt.c
@@ -309,6 +309,9 @@ efi_enter(void)
 		fpu_kern_leave(td, NULL);
 		mtx_unlock(&efi_lock);
 		PMAP_UNLOCK(curpmap);
+	} else {
+		MPASS((td->td_pflags2 & TDP2_EFIRT) == 0);
+		td->td_pflags2 |= TDP2_EFIRT;
 	}
 	return (error);
 }
@@ -319,10 +322,13 @@ efi_leave(void)
 	struct thread *td;
 	pmap_t curpmap;
 
+	td = curthread;
+	MPASS((td->td_pflags2 & TDP2_EFIRT) == 0);
+	td->td_pflags2 &= ~TDP2_EFIRT;
+
 	efi_arch_leave();
 
 	curpmap = &curproc->p_vmspace->vm_pmap;
-	td = curthread;
 	fpu_kern_leave(td, NULL);
 	mtx_unlock(&efi_lock);
 	PMAP_UNLOCK(curpmap);
diff --git a/sys/sys/proc.h b/sys/sys/proc.h
index f794cbe17442..3815571cd46f 100644
--- a/sys/sys/proc.h
+++ b/sys/sys/proc.h
@@ -567,6 +567,7 @@ enum {
 #define	TDP2_SBPAGES	0x00000001 /* Owns sbusy on some pages */
 #define	TDP2_COMPAT32RB	0x00000002 /* compat32 ABI for robust lists */
 #define	TDP2_ACCT	0x00000004 /* Doing accounting */
+#define	TDP2_EFIRT	0x20000000 /* In firmware (EFI RT) call */
 
 /*
  * Reasons that the current thread can not be run yet.