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-rw-r--r--arch/ia64/include/asm/efi.h13
-rw-r--r--arch/ia64/kernel/efi.c1
-rw-r--r--arch/ia64/kernel/machine_kexec.c1
-rw-r--r--arch/ia64/kernel/mca.c1
-rw-r--r--arch/ia64/kernel/smpboot.c1
-rw-r--r--arch/ia64/kernel/time.c1
-rw-r--r--arch/ia64/kernel/uncached.c4
-rw-r--r--arch/ia64/mm/contig.c1
-rw-r--r--arch/ia64/mm/discontig.c1
-rw-r--r--arch/ia64/mm/init.c1
-rw-r--r--arch/x86/include/asm/efi.h20
-rw-r--r--arch/x86/platform/efi/efi_64.c29
-rw-r--r--arch/x86/platform/efi/efi_thunk_64.S6
-rw-r--r--drivers/firmware/efi/libstub/arm64-stub.c4
-rw-r--r--drivers/firmware/efi/libstub/efistub.h11
-rw-r--r--include/linux/efi.h19
16 files changed, 63 insertions, 51 deletions
diff --git a/arch/ia64/include/asm/efi.h b/arch/ia64/include/asm/efi.h
new file mode 100644
index 000000000000..6a4a50d8f19a
--- /dev/null
+++ b/arch/ia64/include/asm/efi.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_EFI_H
+#define _ASM_EFI_H
+
+typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
+
+void *efi_get_pal_addr(void);
+void efi_map_pal_code(void);
+void efi_memmap_walk(efi_freemem_callback_t, void *);
+void efi_memmap_walk_uc(efi_freemem_callback_t, void *);
+void efi_gettimeofday(struct timespec64 *ts);
+
+#endif
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index f932b25fb817..dd7fd750bb93 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -34,6 +34,7 @@
#include <linux/kexec.h>
#include <linux/mm.h>
+#include <asm/efi.h>
#include <asm/io.h>
#include <asm/kregs.h>
#include <asm/meminit.h>
diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
index efc9b568401c..af310dc8a356 100644
--- a/arch/ia64/kernel/machine_kexec.c
+++ b/arch/ia64/kernel/machine_kexec.c
@@ -16,6 +16,7 @@
#include <linux/numa.h>
#include <linux/mmzone.h>
+#include <asm/efi.h>
#include <asm/numa.h>
#include <asm/mmu_context.h>
#include <asm/setup.h>
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 2703f7795672..0fea266b4d39 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -91,6 +91,7 @@
#include <linux/gfp.h>
#include <asm/delay.h>
+#include <asm/efi.h>
#include <asm/meminit.h>
#include <asm/page.h>
#include <asm/ptrace.h>
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 093040f7e626..49b488580939 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -45,6 +45,7 @@
#include <asm/cache.h>
#include <asm/current.h>
#include <asm/delay.h>
+#include <asm/efi.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mca.h>
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 43e8050145be..fa9c0ab8c6fc 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -26,6 +26,7 @@
#include <linux/sched/cputime.h>
#include <asm/delay.h>
+#include <asm/efi.h>
#include <asm/hw_irq.h>
#include <asm/ptrace.h>
#include <asm/sal.h>
diff --git a/arch/ia64/kernel/uncached.c b/arch/ia64/kernel/uncached.c
index 0750f367837d..51883a66aeb5 100644
--- a/arch/ia64/kernel/uncached.c
+++ b/arch/ia64/kernel/uncached.c
@@ -20,14 +20,12 @@
#include <linux/genalloc.h>
#include <linux/gfp.h>
#include <linux/pgtable.h>
+#include <asm/efi.h>
#include <asm/page.h>
#include <asm/pal.h>
#include <linux/atomic.h>
#include <asm/tlbflush.h>
-
-extern void __init efi_memmap_walk_uc(efi_freemem_callback_t, void *);
-
struct uncached_pool {
struct gen_pool *pool;
struct mutex add_chunk_mutex; /* serialize adding a converted chunk */
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index bfc4ecd0a2ab..62fe80a16f42 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -21,6 +21,7 @@
#include <linux/swap.h>
#include <linux/sizes.h>
+#include <asm/efi.h>
#include <asm/meminit.h>
#include <asm/sections.h>
#include <asm/mca.h>
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index c7311131156e..03b3a02375ff 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -24,6 +24,7 @@
#include <linux/efi.h>
#include <linux/nodemask.h>
#include <linux/slab.h>
+#include <asm/efi.h>
#include <asm/tlb.h>
#include <asm/meminit.h>
#include <asm/numa.h>
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index e76386a3479e..b19f47a5a305 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -27,6 +27,7 @@
#include <linux/swiotlb.h>
#include <asm/dma.h>
+#include <asm/efi.h>
#include <asm/io.h>
#include <asm/numa.h>
#include <asm/patch.h>
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index c98f78330b09..1328b7959b72 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -12,6 +12,7 @@
#include <linux/pgtable.h>
extern unsigned long efi_fw_vendor, efi_config_table;
+extern unsigned long efi_mixed_mode_stack_pa;
/*
* We map the EFI regions needed for runtime services non-contiguously,
@@ -94,22 +95,12 @@ extern asmlinkage u64 __efi_call(void *fp, ...);
__efi_call(__VA_ARGS__); \
})
-/*
- * struct efi_scratch - Scratch space used while switching to/from efi_mm
- * @phys_stack: stack used during EFI Mixed Mode
- * @prev_mm: store/restore stolen mm_struct while switching to/from efi_mm
- */
-struct efi_scratch {
- u64 phys_stack;
- struct mm_struct *prev_mm;
-} __packed;
-
#define arch_efi_call_virt_setup() \
({ \
efi_sync_low_kernel_mappings(); \
kernel_fpu_begin(); \
firmware_restrict_branch_speculation_start(); \
- efi_switch_mm(&efi_mm); \
+ efi_enter_mm(); \
})
#define arch_efi_call_virt(p, f, args...) \
@@ -117,7 +108,7 @@ struct efi_scratch {
#define arch_efi_call_virt_teardown() \
({ \
- efi_switch_mm(efi_scratch.prev_mm); \
+ efi_leave_mm(); \
firmware_restrict_branch_speculation_end(); \
kernel_fpu_end(); \
})
@@ -136,7 +127,6 @@ struct efi_scratch {
#endif /* CONFIG_X86_32 */
-extern struct efi_scratch efi_scratch;
extern int __init efi_memblock_x86_reserve_range(void);
extern void __init efi_print_memmap(void);
extern void __init efi_map_region(efi_memory_desc_t *md);
@@ -149,10 +139,12 @@ extern void __init efi_dump_pagetable(void);
extern void __init efi_apply_memmap_quirks(void);
extern int __init efi_reuse_config(u64 tables, int nr_tables);
extern void efi_delete_dummy_variable(void);
-extern void efi_switch_mm(struct mm_struct *mm);
extern void efi_recover_from_page_fault(unsigned long phys_addr);
extern void efi_free_boot_services(void);
+void efi_enter_mm(void);
+void efi_leave_mm(void);
+
/* kexec external ABI */
struct efi_setup_data {
u64 fw_vendor;
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index 8efd003540ca..bf85db683af4 100644
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -54,10 +54,7 @@
* 0xffff_ffff_0000_0000 and limit EFI VA mapping space to 64G.
*/
static u64 efi_va = EFI_VA_START;
-
-struct efi_scratch efi_scratch;
-
-EXPORT_SYMBOL_GPL(efi_mm);
+static struct mm_struct *efi_prev_mm;
/*
* We need our own copy of the higher levels of the page tables
@@ -237,7 +234,7 @@ int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
return 1;
}
- efi_scratch.phys_stack = page_to_phys(page + 1); /* stack grows down */
+ efi_mixed_mode_stack_pa = page_to_phys(page + 1); /* stack grows down */
npages = (_etext - _text) >> PAGE_SHIFT;
text = __pa(_text);
@@ -462,11 +459,17 @@ void __init efi_dump_pagetable(void)
* can not change under us.
* It should be ensured that there are no concurent calls to this function.
*/
-void efi_switch_mm(struct mm_struct *mm)
+void efi_enter_mm(void)
+{
+ efi_prev_mm = current->active_mm;
+ current->active_mm = &efi_mm;
+ switch_mm(efi_prev_mm, &efi_mm, NULL);
+}
+
+void efi_leave_mm(void)
{
- efi_scratch.prev_mm = current->active_mm;
- current->active_mm = mm;
- switch_mm(efi_scratch.prev_mm, mm, NULL);
+ current->active_mm = efi_prev_mm;
+ switch_mm(&efi_mm, efi_prev_mm, NULL);
}
static DEFINE_SPINLOCK(efi_runtime_lock);
@@ -530,12 +533,12 @@ efi_thunk_set_virtual_address_map(unsigned long memory_map_size,
efi_sync_low_kernel_mappings();
local_irq_save(flags);
- efi_switch_mm(&efi_mm);
+ efi_enter_mm();
status = __efi_thunk(set_virtual_address_map, memory_map_size,
descriptor_size, descriptor_version, virtual_map);
- efi_switch_mm(efi_scratch.prev_mm);
+ efi_leave_mm();
local_irq_restore(flags);
return status;
@@ -829,7 +832,7 @@ efi_set_virtual_address_map(unsigned long memory_map_size,
descriptor_size,
descriptor_version,
virtual_map);
- efi_switch_mm(&efi_mm);
+ efi_enter_mm();
kernel_fpu_begin();
@@ -845,7 +848,7 @@ efi_set_virtual_address_map(unsigned long memory_map_size,
/* grab the virtually remapped EFI runtime services table pointer */
efi.runtime = READ_ONCE(systab->runtime);
- efi_switch_mm(efi_scratch.prev_mm);
+ efi_leave_mm();
return status;
}
diff --git a/arch/x86/platform/efi/efi_thunk_64.S b/arch/x86/platform/efi/efi_thunk_64.S
index 26f0da238c1c..fd3dd1708eba 100644
--- a/arch/x86/platform/efi/efi_thunk_64.S
+++ b/arch/x86/platform/efi/efi_thunk_64.S
@@ -33,7 +33,7 @@ SYM_CODE_START(__efi64_thunk)
* Switch to 1:1 mapped 32-bit stack pointer.
*/
movq %rsp, %rax
- movq efi_scratch(%rip), %rsp
+ movq efi_mixed_mode_stack_pa(%rip), %rsp
push %rax
/*
@@ -70,3 +70,7 @@ SYM_CODE_START(__efi64_thunk)
pushl %ebp
lret
SYM_CODE_END(__efi64_thunk)
+
+ .bss
+ .balign 8
+SYM_DATA(efi_mixed_mode_stack_pa, .quad 0)
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c
index 22ece1ad68a8..b69d63143e0d 100644
--- a/drivers/firmware/efi/libstub/arm64-stub.c
+++ b/drivers/firmware/efi/libstub/arm64-stub.c
@@ -61,10 +61,10 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
status = efi_get_random_bytes(sizeof(phys_seed),
(u8 *)&phys_seed);
if (status == EFI_NOT_FOUND) {
- efi_info("EFI_RNG_PROTOCOL unavailable, KASLR will be disabled\n");
+ efi_info("EFI_RNG_PROTOCOL unavailable\n");
efi_nokaslr = true;
} else if (status != EFI_SUCCESS) {
- efi_err("efi_get_random_bytes() failed (0x%lx), KASLR will be disabled\n",
+ efi_err("efi_get_random_bytes() failed (0x%lx)\n",
status);
efi_nokaslr = true;
}
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index b50a6c67d9bd..cde0a2ef507d 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -672,7 +672,7 @@ typedef union efi_tcg2_protocol efi_tcg2_protocol_t;
union efi_tcg2_protocol {
struct {
void *get_capability;
- efi_status_t (__efiapi *get_event_log)(efi_handle_t,
+ efi_status_t (__efiapi *get_event_log)(efi_tcg2_protocol_t *,
efi_tcg2_event_log_format,
efi_physical_addr_t *,
efi_physical_addr_t *,
@@ -849,4 +849,13 @@ void efi_handle_post_ebs_state(void);
enum efi_secureboot_mode efi_get_secureboot(void);
+#ifdef CONFIG_RESET_ATTACK_MITIGATION
+void efi_enable_reset_attack_mitigation(void);
+#else
+static inline void
+efi_enable_reset_attack_mitigation(void) { }
+#endif
+
+void efi_retrieve_tpm2_eventlog(void);
+
#endif
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 763b816ba19c..8710f5710c1d 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -29,10 +29,10 @@
#include <asm/page.h>
#define EFI_SUCCESS 0
-#define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1)))
+#define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1)))
#define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1)))
#define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1)))
-#define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1)))
+#define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1)))
#define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1)))
#define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1)))
#define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1)))
@@ -167,8 +167,6 @@ struct capsule_info {
int __efi_capsule_setup_info(struct capsule_info *cap_info);
-typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
-
/*
* Types and defines for Time Services
*/
@@ -605,10 +603,6 @@ efi_guid_to_str(efi_guid_t *guid, char *out)
}
extern void efi_init (void);
-extern void *efi_get_pal_addr (void);
-extern void efi_map_pal_code (void);
-extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
-extern void efi_gettimeofday (struct timespec64 *ts);
#ifdef CONFIG_EFI
extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
#else
@@ -1110,13 +1104,6 @@ enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
return efi_secureboot_mode_enabled;
}
-#ifdef CONFIG_RESET_ATTACK_MITIGATION
-void efi_enable_reset_attack_mitigation(void);
-#else
-static inline void
-efi_enable_reset_attack_mitigation(void) { }
-#endif
-
#ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
void efi_check_for_embedded_firmwares(void);
#else
@@ -1125,8 +1112,6 @@ static inline void efi_check_for_embedded_firmwares(void) { }
efi_status_t efi_random_get_seed(void);
-void efi_retrieve_tpm2_eventlog(void);
-
/*
* Arch code can implement the following three template macros, avoiding
* reptition for the void/non-void return cases of {__,}efi_call_virt():
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 16:19:02 +0000