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Message-ID: <20130701101853.GA17400@gmail.com>
Date: Mon, 1 Jul 2013 12:18:53 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] x86/efi changes for v3.11
Linus,
Please pull the latest x86-efi-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-efi-for-linus
HEAD: d3768d885c6ccbf8a137276843177d76c49033a7 x86, efi: retry ExitBootServices() on failure
Two fixes that should in principle increase robustness of our interaction
with the EFI firmware, and a cleanup.
Thanks,
Ingo
------------------>
Borislav Petkov (1):
efi: Convert runtime services function ptrs
Matthew Garrett (1):
UEFI: Don't pass boot services regions to SetVirtualAddressMap()
Zach Bobroff (1):
x86, efi: retry ExitBootServices() on failure
arch/x86/boot/compressed/eboot.c | 20 +++++++++++++++++---
arch/x86/include/asm/efi.h | 28 ++++++++++++++--------------
arch/x86/platform/efi/efi.c | 7 +++++++
include/linux/efi.h | 28 ++++++++++++++--------------
4 files changed, 52 insertions(+), 31 deletions(-)
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index 35ee62f..7c6e5d9 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -1037,18 +1037,20 @@ static efi_status_t exit_boot(struct boot_params *boot_params,
efi_memory_desc_t *mem_map;
efi_status_t status;
__u32 desc_version;
+ bool called_exit = false;
u8 nr_entries;
int i;
size = sizeof(*mem_map) * 32;
again:
- size += sizeof(*mem_map);
+ size += sizeof(*mem_map) * 2;
_size = size;
status = low_alloc(size, 1, (unsigned long *)&mem_map);
if (status != EFI_SUCCESS)
return status;
+get_map:
status = efi_call_phys5(sys_table->boottime->get_memory_map, &size,
mem_map, &key, &desc_size, &desc_version);
if (status == EFI_BUFFER_TOO_SMALL) {
@@ -1074,8 +1076,20 @@ again:
/* Might as well exit boot services now */
status = efi_call_phys2(sys_table->boottime->exit_boot_services,
handle, key);
- if (status != EFI_SUCCESS)
- goto free_mem_map;
+ if (status != EFI_SUCCESS) {
+ /*
+ * ExitBootServices() will fail if any of the event
+ * handlers change the memory map. In which case, we
+ * must be prepared to retry, but only once so that
+ * we're guaranteed to exit on repeated failures instead
+ * of spinning forever.
+ */
+ if (called_exit)
+ goto free_mem_map;
+
+ called_exit = true;
+ goto get_map;
+ }
/* Historic? */
boot_params->alt_mem_k = 32 * 1024;
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 2fb5d58..5b33686 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -52,40 +52,40 @@ extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
u64 arg4, u64 arg5, u64 arg6);
#define efi_call_phys0(f) \
- efi_call0((void *)(f))
+ efi_call0((f))
#define efi_call_phys1(f, a1) \
- efi_call1((void *)(f), (u64)(a1))
+ efi_call1((f), (u64)(a1))
#define efi_call_phys2(f, a1, a2) \
- efi_call2((void *)(f), (u64)(a1), (u64)(a2))
+ efi_call2((f), (u64)(a1), (u64)(a2))
#define efi_call_phys3(f, a1, a2, a3) \
- efi_call3((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3))
+ efi_call3((f), (u64)(a1), (u64)(a2), (u64)(a3))
#define efi_call_phys4(f, a1, a2, a3, a4) \
- efi_call4((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \
+ efi_call4((f), (u64)(a1), (u64)(a2), (u64)(a3), \
(u64)(a4))
#define efi_call_phys5(f, a1, a2, a3, a4, a5) \
- efi_call5((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \
+ efi_call5((f), (u64)(a1), (u64)(a2), (u64)(a3), \
(u64)(a4), (u64)(a5))
#define efi_call_phys6(f, a1, a2, a3, a4, a5, a6) \
- efi_call6((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \
+ efi_call6((f), (u64)(a1), (u64)(a2), (u64)(a3), \
(u64)(a4), (u64)(a5), (u64)(a6))
#define efi_call_virt0(f) \
- efi_call0((void *)(efi.systab->runtime->f))
+ efi_call0((efi.systab->runtime->f))
#define efi_call_virt1(f, a1) \
- efi_call1((void *)(efi.systab->runtime->f), (u64)(a1))
+ efi_call1((efi.systab->runtime->f), (u64)(a1))
#define efi_call_virt2(f, a1, a2) \
- efi_call2((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2))
+ efi_call2((efi.systab->runtime->f), (u64)(a1), (u64)(a2))
#define efi_call_virt3(f, a1, a2, a3) \
- efi_call3((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
+ efi_call3((efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
(u64)(a3))
#define efi_call_virt4(f, a1, a2, a3, a4) \
- efi_call4((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
+ efi_call4((efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
(u64)(a3), (u64)(a4))
#define efi_call_virt5(f, a1, a2, a3, a4, a5) \
- efi_call5((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
+ efi_call5((efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
(u64)(a3), (u64)(a4), (u64)(a5))
#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
- efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
+ efi_call6((efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
(u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 55856b2..339e11f 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -1026,6 +1026,13 @@ void __init efi_enter_virtual_mode(void)
va = efi_ioremap(md->phys_addr, size,
md->type, md->attribute);
+ if (!(md->attribute & EFI_MEMORY_RUNTIME)) {
+ if (!va)
+ pr_err("ioremap of 0x%llX failed!\n",
+ (unsigned long long)md->phys_addr);
+ continue;
+ }
+
md->virt_addr = (u64) (unsigned long) va;
if (!va) {
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 2bc0ad7..21ae6b3 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -287,20 +287,20 @@ typedef struct {
typedef struct {
efi_table_hdr_t hdr;
- unsigned long get_time;
- unsigned long set_time;
- unsigned long get_wakeup_time;
- unsigned long set_wakeup_time;
- unsigned long set_virtual_address_map;
- unsigned long convert_pointer;
- unsigned long get_variable;
- unsigned long get_next_variable;
- unsigned long set_variable;
- unsigned long get_next_high_mono_count;
- unsigned long reset_system;
- unsigned long update_capsule;
- unsigned long query_capsule_caps;
- unsigned long query_variable_info;
+ void *get_time;
+ void *set_time;
+ void *get_wakeup_time;
+ void *set_wakeup_time;
+ void *set_virtual_address_map;
+ void *convert_pointer;
+ void *get_variable;
+ void *get_next_variable;
+ void *set_variable;
+ void *get_next_high_mono_count;
+ void *reset_system;
+ void *update_capsule;
+ void *query_capsule_caps;
+ void *query_variable_info;
} efi_runtime_services_t;
typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
--
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