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From: Sergey Temerkhanov <s.temerkhanov@gmail.com>
To: xen-devel@lists.xenproject.org
Cc: Sergey Temerkhanov <s.temerkhanov@gmail.com>,
	Jan Beulich <jbeulich@suse.com>
Subject: [PATCH] efi: Always map EfiRuntimeServicesCode and EfiRuntimeServicesData
Date: Fri,  4 Sep 2020 02:24:58 +0300	[thread overview]
Message-ID: <20200903232458.16551-1-s.temerkhanov@gmail.com> (raw)

This helps overcome problems observed with some UEFI implementations
which don't set the Attributes field in memery descriptors properly

Signed-off-by: Sergey Temerkhanov <s.temerkhanov@gmail.com>
---
 xen/common/efi/boot.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/xen/common/efi/boot.c b/xen/common/efi/boot.c
index 5a520bf21d..4644ce2525 100644
--- a/xen/common/efi/boot.c
+++ b/xen/common/efi/boot.c
@@ -1521,7 +1521,9 @@ void __init efi_init_memory(void)
         }
 
         if ( !efi_enabled(EFI_RS) ||
-             (!(desc->Attribute & EFI_MEMORY_RUNTIME) &&
+             ((!(desc->Attribute & EFI_MEMORY_RUNTIME) &&
+                (desc->Type != EfiRuntimeServicesCode &&
+                 desc->Type != EfiRuntimeServicesData)) &&
               (!map_bs ||
                (desc->Type != EfiBootServicesCode &&
                 desc->Type != EfiBootServicesData))) )
-- 
2.26.2



             reply	other threads:[~2020-09-03 23:25 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-03 23:24 Sergey Temerkhanov [this message]
2020-09-04  9:47 ` [PATCH] efi: Always map EfiRuntimeServicesCode and EfiRuntimeServicesData Jan Beulich
2020-09-04 21:03   ` Sergei Temerkhanov
2020-09-07  6:16     ` Jan Beulich

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