01.04.2017 12:09, Andrei Borzenkov пишет:
>
> I also have rather weird issue that after "acpi dsdt.aml" I lose
> partitions (only hard disk itself is visible). This is on real hardware
> (Dell Latitude E5450).
>
>
Anyone knows why we attempt to write to some arbitrary memory location
on EFI in the first place?
From: Andrei Borzenkov <arvidj...@gmail.com>
Subject: [PATCH] acpi: do not attempt to create EBDA on EFI
There is no gurantee that BDA or EBDA on EFI exists; blindly writing
into memory will likely corrupt it. This fixed problem on Dell Latitude
E5450, where after loading ACPI table GRUB "lost" all disk partitions.
---
grub-core/commands/acpi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/grub-core/commands/acpi.c b/grub-core/commands/acpi.c
index 9f02f22..a395d74 100644
--- a/grub-core/commands/acpi.c
+++ b/grub-core/commands/acpi.c
@@ -119,7 +119,7 @@ grub_acpi_get_rsdpv1 (void)
return grub_machine_acpi_get_rsdpv1 ();
}
-#if defined (__i386__) || defined (__x86_64__)
+#if defined (__i386__) && !defined (GRUB_MACHINE_EFI)
static inline int
iszero (grub_uint8_t *reg, int size)
@@ -741,7 +741,7 @@ grub_cmd_acpi (struct grub_extcmd_context *ctxt, int argc, char **args)
}
acpi_tables = 0;
-#if defined (__i386__) || defined (__x86_64__)
+#if defined (__i386__) && !defined (GRUB_MACHINE_EFI)
if (! state[9].set)
{
grub_err_t err;
--
tg: (007f0b4..) u/acpi-skip-ebda-on-efi (depends on: master)
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