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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7a4b7e5e74
Move the trampoline and accessors back out of .cpuinit.* for the case of 64-bits+ACPI_SLEEP. This solves s2ram hangs reported in: http://bugzilla.kernel.org/show_bug.cgi?id=14279 Reported-and-bisected-by: Christian Casteyde <casteyde.christian@free.fr> Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: <bugzilla-daemon@bugzilla.kernel.org> Cc: "Andrew Morton" <akpm@linux-foundation.org> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
#include <linux/io.h>
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#include <asm/trampoline.h>
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#include <asm/e820.h>
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#if defined(CONFIG_X86_64) && defined(CONFIG_ACPI_SLEEP)
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#define __trampinit
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#define __trampinitdata
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#else
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#define __trampinit __cpuinit
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#define __trampinitdata __cpuinitdata
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#endif
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/* ready for x86_64 and x86 */
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unsigned char *__trampinitdata trampoline_base = __va(TRAMPOLINE_BASE);
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void __init reserve_trampoline_memory(void)
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{
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#ifdef CONFIG_X86_32
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/*
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* But first pinch a few for the stack/trampoline stuff
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* FIXME: Don't need the extra page at 4K, but need to fix
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* trampoline before removing it. (see the GDT stuff)
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*/
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reserve_early(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE");
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#endif
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/* Has to be in very low memory so we can execute real-mode AP code. */
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reserve_early(TRAMPOLINE_BASE, TRAMPOLINE_BASE + TRAMPOLINE_SIZE,
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"TRAMPOLINE");
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}
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/*
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* Currently trivial. Write the real->protected mode
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* bootstrap into the page concerned. The caller
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* has made sure it's suitably aligned.
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*/
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unsigned long __trampinit setup_trampoline(void)
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{
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memcpy(trampoline_base, trampoline_data, TRAMPOLINE_SIZE);
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return virt_to_phys(trampoline_base);
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}
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