linux-kernel - [PATCH 4/4] efi: libstub/tpm: enable tpm eventlog function for ARM platforms

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Message-Id: <20191107151036.5586-5-ardb@kernel.org>
Date:   Thu,  7 Nov 2019 16:10:36 +0100
From:   Ard Biesheuvel <ardb@...nel.org>
To:     linux-efi@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Ard Biesheuvel <ardb@...nel.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        linux-kernel@...r.kernel.org,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Xinwei Kong <kong.kongxinwei@...ilicon.com>,
        Zou Cao <zoucao@...ux.alibaba.com>
Subject: [PATCH 4/4] efi: libstub/tpm: enable tpm eventlog function for ARM platforms

From: Xinwei Kong <kong.kongxinwei@...ilicon.com>

Wire up the existing code for ARM that loads the TPM event log into
OS accessible buffers while running the EFI stub so that the kernel
proper can access it at runtime.

Tested-by: Zou Cao <zoucao@...ux.alibaba.com>
Signed-off-by: Xinwei Kong <kong.kongxinwei@...ilicon.com>
Signed-off-by: Ard Biesheuvel <ardb@...nel.org>
---
 drivers/firmware/efi/libstub/arm-stub.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/firmware/efi/libstub/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c
index c382a48c6678..817237ce2420 100644
--- a/drivers/firmware/efi/libstub/arm-stub.c
+++ b/drivers/firmware/efi/libstub/arm-stub.c
@@ -189,6 +189,8 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table,
 		goto fail_free_cmdline;
 	}
 
+	efi_retrieve_tpm2_eventlog(sys_table);
+
 	/* Ask the firmware to clear memory on unclean shutdown */
 	efi_enable_reset_attack_mitigation(sys_table);
 
-- 
2.17.1