diff options
| author | Angel Pons <th3fanbus@gmail.com> | 2021-03-25 13:02:22 +0100 |
|---|---|---|
| committer | Patrick Rudolph <siro@das-labor.org> | 2021-06-21 08:26:41 +0000 |
| commit | 232222727d51f2d254121738b2e3ff92b8c1dc1f (patch) | |
| tree | bf8be8f510686c774581c8afa6df0dfb6cc1a391 /src/soc/intel/common/block/smm/smihandler.c | |
| parent | d21b463fb058deccef3a2c2ad80d771b5aba9f19 (diff) | |
soc/intel/common: Add InSMM.STS support
Tested on HP 280 G2, SMMSTORE v1 and v2 still work.
Other tests:
- If one does not set BIOS_CONTROL bit WPD, SMMSTORE breaks.
- If one does not write the magic MSR `or 1`, SMMSTORE breaks.
Change-Id: Ia90c0e3f8ccf895bfb6d46ffe26750393dab95fb
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51796
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Diffstat (limited to 'src/soc/intel/common/block/smm/smihandler.c')
| -rw-r--r-- | src/soc/intel/common/block/smm/smihandler.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/src/soc/intel/common/block/smm/smihandler.c b/src/soc/intel/common/block/smm/smihandler.c index 5789b4843e..e1eadb6676 100644 --- a/src/soc/intel/common/block/smm/smihandler.c +++ b/src/soc/intel/common/block/smm/smihandler.c @@ -2,12 +2,15 @@ #include <arch/hlt.h> #include <arch/io.h> +#include <arch/mmio.h> #include <device/pci_ops.h> #include <console/console.h> #include <cpu/x86/cache.h> +#include <cpu/x86/msr.h> #include <cpu/x86/smm.h> #include <cpu/intel/em64t100_save_state.h> #include <cpu/intel/em64t101_save_state.h> +#include <cpu/intel/msr.h> #include <delay.h> #include <device/pci_def.h> #include <elog.h> @@ -260,6 +263,20 @@ static void southbridge_smi_gsmi( save_state_ops->set_reg(io_smi, RAX, ret); } +static void set_insmm_sts(const bool enable_writes) +{ + msr_t msr = { + .lo = read32p(0xfed30880), + .hi = 0, + }; + if (enable_writes) + msr.lo |= 1; + else + msr.lo &= ~1; + + wrmsr(MSR_SPCL_CHIPSET_USAGE, msr); +} + static void southbridge_smi_store( const struct smm_save_state_ops *save_state_ops) { @@ -278,6 +295,7 @@ static void southbridge_smi_store( const bool wp_enabled = !fast_spi_wpd_status(); if (wp_enabled) { + set_insmm_sts(true); fast_spi_disable_wp(); /* Not clearing SPI sync SMI status here results in hangs */ fast_spi_clear_sync_smi_status(); @@ -287,8 +305,10 @@ static void southbridge_smi_store( ret = smmstore_exec(sub_command, (void *)(uintptr_t)reg_ebx); save_state_ops->set_reg(io_smi, RAX, ret); - if (wp_enabled) + if (wp_enabled) { fast_spi_enable_wp(); + set_insmm_sts(false); + } } static void finalize(void) @@ -305,8 +325,10 @@ static void finalize(void) /* Re-init SPI driver to handle locked BAR */ fast_spi_init(); - if (CONFIG(BOOTMEDIA_SMM_BWP)) + if (CONFIG(BOOTMEDIA_SMM_BWP)) { fast_spi_enable_wp(); + set_insmm_sts(false); + } /* * HECI is disabled in smihandler_soc_at_finalize() which also locks down the side band @@ -403,6 +425,7 @@ void smihandler_southbridge_tco( */ printk(BIOS_DEBUG, "Switching SPI back to RO\n"); fast_spi_enable_wp(); + set_insmm_sts(false); } /* Any TCO event? */ |