From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: linux-efi@vger.kernel.org
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Marc Zyngier <marc.zyngier@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
linux-mm@kvack.org, James Morse <james.morse@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] efi/arm: Revert "Defer persistent reservations until after paging_init()"
Date: Wed, 13 Feb 2019 14:27:38 +0100 [thread overview]
Message-ID: <20190213132738.10294-3-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20190213132738.10294-1-ard.biesheuvel@linaro.org>
This reverts commit eff896288872d687d9662000ec9ae11b6d61766f, which
deferred the processing of persistent memory reservations to a point
where the memory may have already been allocated and overwritten,
defeating the purpose.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
arch/arm64/kernel/setup.c | 1 -
drivers/firmware/efi/efi.c | 4 ----
drivers/firmware/efi/libstub/arm-stub.c | 3 ---
include/linux/efi.h | 7 -------
4 files changed, 15 deletions(-)
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 4b0e1231625c..d09ec76f08cf 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -313,7 +313,6 @@ void __init setup_arch(char **cmdline_p)
arm64_memblock_init();
paging_init();
- efi_apply_persistent_mem_reservations();
acpi_table_upgrade();
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 4c46ff6f2242..55b77c576c42 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -592,11 +592,7 @@ int __init efi_config_parse_tables(void *config_tables, int count, int sz,
early_memunmap(tbl, sizeof(*tbl));
}
- return 0;
-}
-int __init efi_apply_persistent_mem_reservations(void)
-{
if (efi.mem_reserve != EFI_INVALID_TABLE_ADDR) {
unsigned long prsv = efi.mem_reserve;
diff --git a/drivers/firmware/efi/libstub/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c
index eee42d5e25ee..c037c6c5d0b7 100644
--- a/drivers/firmware/efi/libstub/arm-stub.c
+++ b/drivers/firmware/efi/libstub/arm-stub.c
@@ -75,9 +75,6 @@ void install_memreserve_table(efi_system_table_t *sys_table_arg)
efi_guid_t memreserve_table_guid = LINUX_EFI_MEMRESERVE_TABLE_GUID;
efi_status_t status;
- if (IS_ENABLED(CONFIG_ARM))
- return;
-
status = efi_call_early(allocate_pool, EFI_LOADER_DATA, sizeof(*rsv),
(void **)&rsv);
if (status != EFI_SUCCESS) {
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 45ff763fba76..28604a8d0aa9 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1198,8 +1198,6 @@ static inline bool efi_enabled(int feature)
extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
extern bool efi_is_table_address(unsigned long phys_addr);
-
-extern int efi_apply_persistent_mem_reservations(void);
#else
static inline bool efi_enabled(int feature)
{
@@ -1218,11 +1216,6 @@ static inline bool efi_is_table_address(unsigned long phys_addr)
{
return false;
}
-
-static inline int efi_apply_persistent_mem_reservations(void)
-{
- return 0;
-}
#endif
extern int efi_status_to_err(efi_status_t status);
--
2.20.1
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next prev parent reply other threads:[~2019-02-13 13:29 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-13 13:27 [PATCH 0/2] efi/arm/gicv3: implement fix for memory reservation issue Ard Biesheuvel
2019-02-13 13:27 ` [PATCH 1/2] arm64: account for GICv3 LPI tables in static memblock reserve table Ard Biesheuvel
2019-02-14 8:33 ` Mike Rapoport
2019-02-14 14:57 ` Ard Biesheuvel
2019-02-14 15:11 ` Mike Rapoport
2019-02-14 14:40 ` Will Deacon
2019-02-14 15:47 ` Marc Zyngier
2019-02-14 16:55 ` Ard Biesheuvel
2019-02-15 10:34 ` Marc Zyngier
2019-02-13 13:27 ` Ard Biesheuvel [this message]
2019-02-15 12:33 [GIT PULL 0/2] EFI fixes for v5.0-rc Ard Biesheuvel
2019-02-15 12:33 ` [PATCH 2/2] efi/arm: Revert "Defer persistent reservations until after paging_init()" Ard Biesheuvel
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