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From: Ilias Apalodimas <ilias.apalodimas@linaro.org>
To: linux-efi@vger.kernel.org
Cc: ardb@kernel.org, pjones@redhat.com, nivedita@alum.mit.edu,
	mjg59@google.com, daniel.kiper@oracle.com,
	James.Bottomley@hansenpartnership.com, leif@nuviainc.com,
	jroedel@suse.de, Ilias Apalodimas <ilias.apalodimas@linaro.org>
Subject: [PATCH 3/4 v3] efi/libstub: consolidate initrd handling across architectures
Date: Fri, 19 Nov 2021 13:47:44 +0200	[thread overview]
Message-ID: <20211119114745.1560453-4-ilias.apalodimas@linaro.org> (raw)
In-Reply-To: <20211119114745.1560453-1-ilias.apalodimas@linaro.org>

From: Ard Biesheuvel <ardb@kernel.org>

Before adding TPM measurement of the initrd contents, refactor the
initrd handling slightly to be more self-contained and consistent.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
---
Changes since v1,2: 
- None
 .../firmware/efi/libstub/efi-stub-helper.c    | 13 +++++++---
 drivers/firmware/efi/libstub/efi-stub.c       | 10 ++-----
 drivers/firmware/efi/libstub/efistub.h        |  1 -
 drivers/firmware/efi/libstub/x86-stub.c       | 26 +++++++------------
 4 files changed, 21 insertions(+), 29 deletions(-)

diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index d489bdc645fe..01677181453d 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -20,10 +20,10 @@
 
 bool efi_nochunk;
 bool efi_nokaslr = !IS_ENABLED(CONFIG_RANDOMIZE_BASE);
-bool efi_noinitrd;
 int efi_loglevel = CONSOLE_LOGLEVEL_DEFAULT;
 bool efi_novamap;
 
+static bool efi_noinitrd;
 static bool efi_nosoftreserve;
 static bool efi_disable_pci_dma = IS_ENABLED(CONFIG_EFI_DISABLE_PCI_DMA);
 
@@ -643,8 +643,10 @@ efi_status_t efi_load_initrd(efi_loaded_image_t *image,
 {
 	efi_status_t status;
 
-	if (!load_addr || !load_size)
-		return EFI_INVALID_PARAMETER;
+	if (efi_noinitrd) {
+		*load_addr = *load_size = 0;
+		return EFI_SUCCESS;
+	}
 
 	status = efi_load_initrd_dev_path(load_addr, load_size, hard_limit);
 	if (status == EFI_SUCCESS) {
@@ -655,7 +657,10 @@ efi_status_t efi_load_initrd(efi_loaded_image_t *image,
 		if (status == EFI_SUCCESS && *load_size > 0)
 			efi_info("Loaded initrd from command line option\n");
 	}
-
+	if (status != EFI_SUCCESS) {
+		efi_err("Failed to load initrd: 0x%lx\n", status);
+		*load_addr = *load_size = 0;
+	}
 	return status;
 }
 
diff --git a/drivers/firmware/efi/libstub/efi-stub.c b/drivers/firmware/efi/libstub/efi-stub.c
index 26e69788f27a..e87e7f1b1a33 100644
--- a/drivers/firmware/efi/libstub/efi-stub.c
+++ b/drivers/firmware/efi/libstub/efi-stub.c
@@ -134,7 +134,6 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
 	enum efi_secureboot_mode secure_boot;
 	struct screen_info *si;
 	efi_properties_table_t *prop_tbl;
-	unsigned long max_addr;
 
 	efi_system_table = sys_table_arg;
 
@@ -240,13 +239,8 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
 	if (!fdt_addr)
 		efi_info("Generating empty DTB\n");
 
-	if (!efi_noinitrd) {
-		max_addr = efi_get_max_initrd_addr(image_addr);
-		status = efi_load_initrd(image, &initrd_addr, &initrd_size,
-					 ULONG_MAX, max_addr);
-		if (status != EFI_SUCCESS)
-			efi_err("Failed to load initrd!\n");
-	}
+	efi_load_initrd(image, &initrd_addr, &initrd_size, ULONG_MAX,
+			efi_get_max_initrd_addr(image_addr));
 
 	efi_random_get_seed();
 
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index a2825c435158..edb77b0621ea 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -31,7 +31,6 @@
 
 extern bool efi_nochunk;
 extern bool efi_nokaslr;
-extern bool efi_noinitrd;
 extern int efi_loglevel;
 extern bool efi_novamap;
 
diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c
index f14c4ff5839f..01ddd4502e28 100644
--- a/drivers/firmware/efi/libstub/x86-stub.c
+++ b/drivers/firmware/efi/libstub/x86-stub.c
@@ -673,6 +673,7 @@ unsigned long efi_main(efi_handle_t handle,
 	unsigned long bzimage_addr = (unsigned long)startup_32;
 	unsigned long buffer_start, buffer_end;
 	struct setup_header *hdr = &boot_params->hdr;
+	unsigned long addr, size;
 	efi_status_t status;
 
 	efi_system_table = sys_table_arg;
@@ -761,22 +762,15 @@ unsigned long efi_main(efi_handle_t handle,
 	 * arguments will be processed only if image is not NULL, which will be
 	 * the case only if we were loaded via the PE entry point.
 	 */
-	if (!efi_noinitrd) {
-		unsigned long addr, size;
-
-		status = efi_load_initrd(image, &addr, &size,
-					 hdr->initrd_addr_max, ULONG_MAX);
-
-		if (status != EFI_SUCCESS) {
-			efi_err("Failed to load initrd!\n");
-			goto fail;
-		}
-		if (size > 0) {
-			efi_set_u64_split(addr, &hdr->ramdisk_image,
-					  &boot_params->ext_ramdisk_image);
-			efi_set_u64_split(size, &hdr->ramdisk_size,
-					  &boot_params->ext_ramdisk_size);
-		}
+	status = efi_load_initrd(image, &addr, &size, hdr->initrd_addr_max,
+				 ULONG_MAX);
+	if (status != EFI_SUCCESS)
+		goto fail;
+	if (size > 0) {
+		efi_set_u64_split(addr, &hdr->ramdisk_image,
+				  &boot_params->ext_ramdisk_image);
+		efi_set_u64_split(size, &hdr->ramdisk_size,
+				  &boot_params->ext_ramdisk_size);
 	}
 
 	/*
-- 
2.33.1


  parent reply	other threads:[~2021-11-19 11:48 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-19 11:47 [PATCH 0/4 v3] measure initrd data loaded by the EFI stub Ilias Apalodimas
2021-11-19 11:47 ` [PATCH 1/4 v3] efi/libstub: add prototype of efi_tcg2_protocol::hash_log_extend_event() Ilias Apalodimas
2021-11-19 11:47 ` [PATCH 2/4 v3] efi/libstub: x86/mixed: increase supported argument count Ilias Apalodimas
2021-11-19 11:47 ` Ilias Apalodimas [this message]
2021-11-19 11:47 ` [PATCH 4/4 v3] efi/libstub: measure loaded initrd info into the TPM Ilias Apalodimas
2021-11-21 16:12 ` [PATCH 0/4 v3] measure initrd data loaded by the EFI stub Ard Biesheuvel
2021-11-21 18:36   ` Ilias Apalodimas
2021-12-13 15:26     ` Ard Biesheuvel

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