diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 177026979e98..ffe52382033c 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -118,12 +118,9 @@ static DEFINE_MUTEX(ghes_list_mutex);
  * from BIOS to Linux can be determined only in NMI, IRQ or timer
  * handler, but general ioremap can not be used in atomic context, so
  * the fixmap is used instead.
- *
- * These 2 spinlocks are used to prevent the fixmap entries from being used
- * simultaneously.
  */
-static DEFINE_RAW_SPINLOCK(ghes_ioremap_lock_nmi);
-static DEFINE_SPINLOCK(ghes_ioremap_lock_irq);
+static DEFINE_RAW_SPINLOCK(ghes_fixmap_lock_nmi);
+static DEFINE_SPINLOCK(ghes_fixmap_lock_irq);
 
 static struct gen_pool *ghes_estatus_pool;
 static unsigned long ghes_estatus_pool_size_request;
@@ -133,38 +130,16 @@ static atomic_t ghes_estatus_cache_alloced;
 
 static int ghes_panic_timeout __read_mostly = 30;
 
-static void __iomem *ghes_ioremap_pfn_nmi(u64 pfn)
-{
-	phys_addr_t paddr;
-	pgprot_t prot;
-
-	paddr = pfn << PAGE_SHIFT;
-	prot = arch_apei_get_mem_attribute(paddr);
-	__set_fixmap(FIX_APEI_GHES_NMI, paddr, prot);
-
-	return (void __iomem *) fix_to_virt(FIX_APEI_GHES_NMI);
-}
-
-static void __iomem *ghes_ioremap_pfn_irq(u64 pfn)
+static void __iomem *ghes_fixmap_pfn(int fixmap_idx, u64 pfn)
 {
 	phys_addr_t paddr;
 	pgprot_t prot;
 
 	paddr = pfn << PAGE_SHIFT;
 	prot = arch_apei_get_mem_attribute(paddr);
-	__set_fixmap(FIX_APEI_GHES_IRQ, paddr, prot);
+	__set_fixmap(fixmap_idx, paddr, prot);
 
-	return (void __iomem *) fix_to_virt(FIX_APEI_GHES_IRQ);
-}
-
-static void ghes_iounmap_nmi(void)
-{
-	clear_fixmap(FIX_APEI_GHES_NMI);
-}
-
-static void ghes_iounmap_irq(void)
-{
-	clear_fixmap(FIX_APEI_GHES_IRQ);
+	return (void __iomem *) __fix_to_virt(fixmap_idx);
 }
 
 static int ghes_estatus_pool_init(void)
@@ -292,10 +267,11 @@ static inline int ghes_severity(int severity)
 	}
 }
 
-static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
-				  int from_phys)
+static void ghes_copy_tofrom_phys(struct ghes *ghes, void *buffer, u64 paddr,
+				  u32 len, int from_phys)
 {
 	void __iomem *vaddr;
+	int fixmap_idx = FIX_APEI_GHES_IRQ;
 	unsigned long flags = 0;
 	int in_nmi = in_nmi();
 	u64 offset;
@@ -304,12 +280,12 @@ static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
 	while (len > 0) {
 		offset = paddr - (paddr & PAGE_MASK);
 		if (in_nmi) {
-			raw_spin_lock(&ghes_ioremap_lock_nmi);
-			vaddr = ghes_ioremap_pfn_nmi(paddr >> PAGE_SHIFT);
+			raw_spin_lock(ghes->nmi_fixmap_lock);
+			fixmap_idx = ghes->nmi_fixmap_idx;
 		} else {
-			spin_lock_irqsave(&ghes_ioremap_lock_irq, flags);
-			vaddr = ghes_ioremap_pfn_irq(paddr >> PAGE_SHIFT);
+			spin_lock_irqsave(&ghes_fixmap_lock_irq, flags);
 		}
+		vaddr = ghes_fixmap_pfn(fixmap_idx, paddr >> PAGE_SHIFT);
 		trunk = PAGE_SIZE - offset;
 		trunk = min(trunk, len);
 		if (from_phys)
@@ -319,13 +295,11 @@ static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
 		len -= trunk;
 		paddr += trunk;
 		buffer += trunk;
-		if (in_nmi) {
-			ghes_iounmap_nmi();
-			raw_spin_unlock(&ghes_ioremap_lock_nmi);
-		} else {
-			ghes_iounmap_irq();
-			spin_unlock_irqrestore(&ghes_ioremap_lock_irq, flags);
-		}
+		clear_fixmap(fixmap_idx);
+		if (in_nmi)
+			raw_spin_unlock(ghes->nmi_fixmap_lock);
+		else
+			spin_unlock_irqrestore(&ghes_fixmap_lock_irq, flags);
 	}
 }
 
@@ -347,7 +321,7 @@ static int ghes_read_estatus(struct ghes *ghes, int silent)
 	if (!buf_paddr)
 		return -ENOENT;
 
-	ghes_copy_tofrom_phys(ghes->estatus, buf_paddr,
+	ghes_copy_tofrom_phys(ghes, ghes->estatus, buf_paddr,
 			      sizeof(*ghes->estatus), 1);
 	if (!ghes->estatus->block_status)
 		return -ENOENT;
@@ -363,7 +337,7 @@ static int ghes_read_estatus(struct ghes *ghes, int silent)
 		goto err_read_block;
 	if (cper_estatus_check_header(ghes->estatus))
 		goto err_read_block;
-	ghes_copy_tofrom_phys(ghes->estatus + 1,
+	ghes_copy_tofrom_phys(ghes, ghes->estatus + 1,
 			      buf_paddr + sizeof(*ghes->estatus),
 			      len - sizeof(*ghes->estatus), 1);
 	if (cper_estatus_check(ghes->estatus))
@@ -382,7 +356,7 @@ static void ghes_clear_estatus(struct ghes *ghes)
 	ghes->estatus->block_status = 0;
 	if (!(ghes->flags & GHES_TO_CLEAR))
 		return;
-	ghes_copy_tofrom_phys(ghes->estatus, ghes->buffer_paddr,
+	ghes_copy_tofrom_phys(ghes, ghes->estatus, ghes->buffer_paddr,
 			      sizeof(ghes->estatus->block_status), 0);
 	ghes->flags &= ~GHES_TO_CLEAR;
 }
@@ -990,6 +964,8 @@ int ghes_notify_sea(void)
 
 static void ghes_sea_add(struct ghes *ghes)
 {
+	ghes->nmi_fixmap_lock = &ghes_fixmap_lock_nmi;
+	ghes->nmi_fixmap_idx = FIX_APEI_GHES_NMI;
 	ghes_estatus_queue_grow_pool(ghes);
 
 	mutex_lock(&ghes_list_mutex);
@@ -1036,6 +1012,8 @@ static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
 
 static void ghes_nmi_add(struct ghes *ghes)
 {
+	ghes->nmi_fixmap_lock = &ghes_fixmap_lock_nmi;
+	ghes->nmi_fixmap_idx = FIX_APEI_GHES_NMI;
 	ghes_estatus_queue_grow_pool(ghes);
 
 	mutex_lock(&ghes_list_mutex);
diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h
index 8feb0c866ee0..9c6a92730699 100644
--- a/include/acpi/ghes.h
+++ b/include/acpi/ghes.h
@@ -29,6 +29,10 @@ struct ghes {
 		struct timer_list timer;
 		unsigned int irq;
 	};
+
+	/* If this ghes can be called in NMI contet, these must be populated. */
+	raw_spinlock_t *nmi_fixmap_lock;
+	int nmi_fixmap_idx;
 };
 
 struct ghes_estatus_node {
