linux-kernel - [PATCH 3.16 032/125] efi/arm64: Store Runtime Services revision

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Date:	Wed,  3 Sep 2014 15:06:29 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Semen Protsenko <semen.protsenko@...aro.org>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Matt Fleming <matt.fleming@...el.com>
Subject: [PATCH 3.16 032/125] efi/arm64: Store Runtime Services revision

3.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Semen Protsenko <semen.protsenko@...aro.org>

commit 6a7519e81321343165f89abb8b616df186d3e57a upstream.

"efi" global data structure contains "runtime_version" field which must
be assigned in order to use it later in Runtime Services virtual calls
(virt_efi_* functions).

Before this patch "runtime_version" was unassigned (0), so each
Runtime Service virtual call that checks revision would fail.

Signed-off-by: Semen Protsenko <semen.protsenko@...aro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Signed-off-by: Matt Fleming <matt.fleming@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm64/kernel/efi.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -464,6 +464,8 @@ static int __init arm64_enter_virtual_mo
 
 	set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
 
+	efi.runtime_version = efi.systab->hdr.revision;
+
 	return 0;
 }
 early_initcall(arm64_enter_virtual_mode);


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