diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2020-12-01 18:29:13 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2021-03-18 08:10:11 +0000 |
| commit | e69d2dfdb70c33dfcc07a54c217601f498c2214c (patch) | |
| tree | fa79b9a46e7c80b6c5ac06ec582b79db66c56d4a /src/mainboard/emulation/qemu-q35/memmap.c | |
| parent | ff485f2bcef9d0c8cf9536f6b8bc87edbe718e04 (diff) | |
mb/emulation/qemu-q35: Add support for SMM_TSEG with parallel MP init
Tested with and without -enable-kvm, with -smp 1 2 and 32.
Change-Id: I612cebcd2ddef809434eb9bfae9d8681cda112ef
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48262
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/emulation/qemu-q35/memmap.c')
| -rw-r--r-- | src/mainboard/emulation/qemu-q35/memmap.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/mainboard/emulation/qemu-q35/memmap.c b/src/mainboard/emulation/qemu-q35/memmap.c index f3ce42c485..5c4292138d 100644 --- a/src/mainboard/emulation/qemu-q35/memmap.c +++ b/src/mainboard/emulation/qemu-q35/memmap.c @@ -8,6 +8,7 @@ #include <device/pci_ops.h> #include <mainboard/emulation/qemu-i440fx/memory.h> #include <mainboard/emulation/qemu-i440fx/fw_cfg.h> +#include <cpu/intel/smm_reloc.h> #include "q35.h" @@ -35,6 +36,16 @@ void mainboard_machine_check(void) /* QEMU-specific register */ #define EXT_TSEG_MBYTES 0x50 +#define SMRAMC 0x9d +#define C_BASE_SEG ((0 << 2) | (1 << 1) | (0 << 0)) +#define G_SMRAME (1 << 3) +#define D_LCK (1 << 4) +#define D_CLS (1 << 5) +#define D_OPEN (1 << 6) +#define ESMRAMC 0x9e +#define T_EN (1 << 0) +#define TSEG_SZ_MASK (3 << 1) +#define H_SMRAME (1 << 7) void smm_region(uintptr_t *start, size_t *size) { @@ -57,3 +68,16 @@ void smm_region(uintptr_t *start, size_t *size) *start = qemu_get_memory_size() * KiB - *size; printk(BIOS_SPEW, "SMM_BASE: 0x%08lx, SMM_SIZE: %zu MiB\n", *start, *size / MiB); } + +void smm_lock(void) +{ + /* + * LOCK the SMM memory window and enable normal SMM. + * After running this function, only a full reset can + * make the SMM registers writable again. + */ + printk(BIOS_DEBUG, "Locking SMM.\n"); + + pci_or_config8(PCI_DEV(0, 0, 0), ESMRAMC, T_EN); + pci_write_config8(PCI_DEV(0, 0, 0), SMRAMC, D_LCK | G_SMRAME | C_BASE_SEG); +} |