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From: Ard Biesheuvel <ardb@kernel.org>
To: linux-efi@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org, keescook@chromium.org,
	mark.rutland@arm.com, catalin.marinas@arm.com,
	Ard Biesheuvel <ardb@kernel.org>
Subject: [RFC PATCH v2 16/18] efi: libstub: pass image handle to handle_kernel_image()
Date: Wed, 30 Mar 2022 17:42:03 +0200	[thread overview]
Message-ID: <20220330154205.2483167-17-ardb@kernel.org> (raw)
In-Reply-To: <20220330154205.2483167-1-ardb@kernel.org>

In a future patch, arm64's implementation of handle_kernel_image() will
omit randomizing the placement of the kernel if the load address was
chosen randomly by the loader. In order to do this, it needs to locate a
protocol on the image handle, so pass it to handle_kernel_image().

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/libstub/arm32-stub.c | 3 ++-
 drivers/firmware/efi/libstub/arm64-stub.c | 3 ++-
 drivers/firmware/efi/libstub/efi-stub.c   | 2 +-
 drivers/firmware/efi/libstub/efistub.h    | 3 ++-
 drivers/firmware/efi/libstub/riscv-stub.c | 3 ++-
 5 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/firmware/efi/libstub/arm32-stub.c b/drivers/firmware/efi/libstub/arm32-stub.c
index 4b5b2403b3a0..0131e3aaa605 100644
--- a/drivers/firmware/efi/libstub/arm32-stub.c
+++ b/drivers/firmware/efi/libstub/arm32-stub.c
@@ -117,7 +117,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
 				 unsigned long *image_size,
 				 unsigned long *reserve_addr,
 				 unsigned long *reserve_size,
-				 efi_loaded_image_t *image)
+				 efi_loaded_image_t *image,
+				 efi_handle_t image_handle)
 {
 	const int slack = TEXT_OFFSET - 5 * PAGE_SIZE;
 	int alloc_size = MAX_UNCOMP_KERNEL_SIZE + EFI_PHYS_ALIGN;
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c
index 9cc556013d08..00c91a3807ea 100644
--- a/drivers/firmware/efi/libstub/arm64-stub.c
+++ b/drivers/firmware/efi/libstub/arm64-stub.c
@@ -83,7 +83,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
 				 unsigned long *image_size,
 				 unsigned long *reserve_addr,
 				 unsigned long *reserve_size,
-				 efi_loaded_image_t *image)
+				 efi_loaded_image_t *image,
+				 efi_handle_t image_handle)
 {
 	efi_status_t status;
 	unsigned long kernel_size, kernel_memsize = 0;
diff --git a/drivers/firmware/efi/libstub/efi-stub.c b/drivers/firmware/efi/libstub/efi-stub.c
index da93864d7abc..f515394cce6e 100644
--- a/drivers/firmware/efi/libstub/efi-stub.c
+++ b/drivers/firmware/efi/libstub/efi-stub.c
@@ -198,7 +198,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
 	status = handle_kernel_image(&image_addr, &image_size,
 				     &reserve_addr,
 				     &reserve_size,
-				     image);
+				     image, handle);
 	if (status != EFI_SUCCESS) {
 		efi_err("Failed to relocate kernel\n");
 		goto fail_free_screeninfo;
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index edb77b0621ea..c4f4f078087d 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -865,7 +865,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
 				 unsigned long *image_size,
 				 unsigned long *reserve_addr,
 				 unsigned long *reserve_size,
-				 efi_loaded_image_t *image);
+				 efi_loaded_image_t *image,
+				 efi_handle_t image_handle);
 
 asmlinkage void __noreturn efi_enter_kernel(unsigned long entrypoint,
 					    unsigned long fdt_addr,
diff --git a/drivers/firmware/efi/libstub/riscv-stub.c b/drivers/firmware/efi/libstub/riscv-stub.c
index 9c460843442f..eec043873354 100644
--- a/drivers/firmware/efi/libstub/riscv-stub.c
+++ b/drivers/firmware/efi/libstub/riscv-stub.c
@@ -80,7 +80,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
 				 unsigned long *image_size,
 				 unsigned long *reserve_addr,
 				 unsigned long *reserve_size,
-				 efi_loaded_image_t *image)
+				 efi_loaded_image_t *image,
+				 efi_handle_t image_handle)
 {
 	unsigned long kernel_size = 0;
 	unsigned long preferred_addr;
-- 
2.30.2


WARNING: multiple messages have this Message-ID (diff)
From: Ard Biesheuvel <ardb@kernel.org>
To: linux-efi@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org, keescook@chromium.org,
	mark.rutland@arm.com, catalin.marinas@arm.com,
	Ard Biesheuvel <ardb@kernel.org>
Subject: [RFC PATCH v2 16/18] efi: libstub: pass image handle to handle_kernel_image()
Date: Wed, 30 Mar 2022 17:42:03 +0200	[thread overview]
Message-ID: <20220330154205.2483167-17-ardb@kernel.org> (raw)
In-Reply-To: <20220330154205.2483167-1-ardb@kernel.org>

In a future patch, arm64's implementation of handle_kernel_image() will
omit randomizing the placement of the kernel if the load address was
chosen randomly by the loader. In order to do this, it needs to locate a
protocol on the image handle, so pass it to handle_kernel_image().

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/libstub/arm32-stub.c | 3 ++-
 drivers/firmware/efi/libstub/arm64-stub.c | 3 ++-
 drivers/firmware/efi/libstub/efi-stub.c   | 2 +-
 drivers/firmware/efi/libstub/efistub.h    | 3 ++-
 drivers/firmware/efi/libstub/riscv-stub.c | 3 ++-
 5 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/firmware/efi/libstub/arm32-stub.c b/drivers/firmware/efi/libstub/arm32-stub.c
index 4b5b2403b3a0..0131e3aaa605 100644
--- a/drivers/firmware/efi/libstub/arm32-stub.c
+++ b/drivers/firmware/efi/libstub/arm32-stub.c
@@ -117,7 +117,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
 				 unsigned long *image_size,
 				 unsigned long *reserve_addr,
 				 unsigned long *reserve_size,
-				 efi_loaded_image_t *image)
+				 efi_loaded_image_t *image,
+				 efi_handle_t image_handle)
 {
 	const int slack = TEXT_OFFSET - 5 * PAGE_SIZE;
 	int alloc_size = MAX_UNCOMP_KERNEL_SIZE + EFI_PHYS_ALIGN;
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c
index 9cc556013d08..00c91a3807ea 100644
--- a/drivers/firmware/efi/libstub/arm64-stub.c
+++ b/drivers/firmware/efi/libstub/arm64-stub.c
@@ -83,7 +83,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
 				 unsigned long *image_size,
 				 unsigned long *reserve_addr,
 				 unsigned long *reserve_size,
-				 efi_loaded_image_t *image)
+				 efi_loaded_image_t *image,
+				 efi_handle_t image_handle)
 {
 	efi_status_t status;
 	unsigned long kernel_size, kernel_memsize = 0;
diff --git a/drivers/firmware/efi/libstub/efi-stub.c b/drivers/firmware/efi/libstub/efi-stub.c
index da93864d7abc..f515394cce6e 100644
--- a/drivers/firmware/efi/libstub/efi-stub.c
+++ b/drivers/firmware/efi/libstub/efi-stub.c
@@ -198,7 +198,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
 	status = handle_kernel_image(&image_addr, &image_size,
 				     &reserve_addr,
 				     &reserve_size,
-				     image);
+				     image, handle);
 	if (status != EFI_SUCCESS) {
 		efi_err("Failed to relocate kernel\n");
 		goto fail_free_screeninfo;
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index edb77b0621ea..c4f4f078087d 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -865,7 +865,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
 				 unsigned long *image_size,
 				 unsigned long *reserve_addr,
 				 unsigned long *reserve_size,
-				 efi_loaded_image_t *image);
+				 efi_loaded_image_t *image,
+				 efi_handle_t image_handle);
 
 asmlinkage void __noreturn efi_enter_kernel(unsigned long entrypoint,
 					    unsigned long fdt_addr,
diff --git a/drivers/firmware/efi/libstub/riscv-stub.c b/drivers/firmware/efi/libstub/riscv-stub.c
index 9c460843442f..eec043873354 100644
--- a/drivers/firmware/efi/libstub/riscv-stub.c
+++ b/drivers/firmware/efi/libstub/riscv-stub.c
@@ -80,7 +80,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
 				 unsigned long *image_size,
 				 unsigned long *reserve_addr,
 				 unsigned long *reserve_size,
-				 efi_loaded_image_t *image)
+				 efi_loaded_image_t *image,
+				 efi_handle_t image_handle)
 {
 	unsigned long kernel_size = 0;
 	unsigned long preferred_addr;
-- 
2.30.2


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  parent reply	other threads:[~2022-03-30 15:42 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-30 15:41 [RFC PATCH v2 00/18] arm64: efi: leave MMU and caches on at boot Ard Biesheuvel
2022-03-30 15:41 ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 01/18] arm64: head: drop idmap_ptrs_per_pgd Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 02/18] arm64: head: split off idmap creation code Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 03/18] arm64: kernel: drop unnecessary PoC cache clean+invalidate Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 04/18] arm64: head: cover entire kernel image in ID map Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 05/18] arm64: head: factor out TTBR1 assignment into a macro Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 06/18] arm64: head: populate kernel page tables with MMU and caches on Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 07/18] arm64: kaslr: deal with init called with VA randomization enabled Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 08/18] arm64: setup: defer R/O remapping of FDT Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 09/18] arm64: head: relocate kernel only a single time if KASLR is enabled Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 10/18] arm64: head: record the MMU state at primary entry Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 11/18] arm64: mm: make vabits_actual a build time constant if possible Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:41 ` [RFC PATCH v2 12/18] arm64: head: avoid cache invalidation when entering with the MMU on Ard Biesheuvel
2022-03-30 15:41   ` Ard Biesheuvel
2022-03-30 15:42 ` [RFC PATCH v2 13/18] arm64: head: record CPU boot mode after enabling the MMU Ard Biesheuvel
2022-03-30 15:42   ` Ard Biesheuvel
2022-03-30 15:42 ` [RFC PATCH v2 14/18] arm64: head: clean the ID map page to the PoC Ard Biesheuvel
2022-03-30 15:42   ` Ard Biesheuvel
2022-03-30 15:42 ` [RFC PATCH v2 15/18] arm64: lds: move idmap_pg_dir out of .rodata Ard Biesheuvel
2022-03-30 15:42   ` Ard Biesheuvel
2022-03-30 15:42 ` Ard Biesheuvel [this message]
2022-03-30 15:42   ` [RFC PATCH v2 16/18] efi: libstub: pass image handle to handle_kernel_image() Ard Biesheuvel
2022-03-30 15:42 ` [RFC PATCH v2 17/18] efi/arm64: libstub: run image in place if randomized by the loader Ard Biesheuvel
2022-03-30 15:42   ` Ard Biesheuvel
2022-03-30 15:42 ` [RFC PATCH v2 18/18] arm64: efi/libstub: enter with the MMU on if executing in place Ard Biesheuvel
2022-03-30 15:42   ` Ard Biesheuvel
2022-03-31 15:37 ` [RFC PATCH v2 00/18] arm64: efi: leave MMU and caches on at boot Mark Rutland
2022-03-31 15:37   ` Mark Rutland
2022-03-31 16:20   ` Ard Biesheuvel
2022-03-31 16:20     ` Ard Biesheuvel

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