intel/smm/gen1: Backup default SMM area
Fix low memory corruption on S3 resume path. Affected platforms were sandy/ivybridge. Change-Id: I7379e7396b61ee4dc2438276d530feffaa1bc8f2 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21100 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Rudolph <siro@das-labor.org>
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@ -55,6 +55,7 @@ struct smm_relocation_params {
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/* This gets filled in and used during relocation. */
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static struct smm_relocation_params smm_reloc_params;
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static void *default_smm_area = NULL;
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static inline void write_smrr(struct smm_relocation_params *relo_params)
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{
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@ -156,6 +157,8 @@ static int install_relocation_handler(int *apic_id_map, int num_cpus,
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.handler_arg = (void *)relo_params,
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};
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default_smm_area = backup_default_smm_area();
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if (smm_setup_relocation_handler(&smm_params))
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return -1;
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int i;
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@ -270,6 +273,11 @@ void smm_init(void)
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smm_lock();
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}
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void smm_init_completion(void)
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{
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restore_default_smm_area(default_smm_area);
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}
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void smm_lock(void)
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{
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/* LOCK the SMM memory window and enable normal SMM.
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