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coreboot-kgpe-d16/src/drivers/smmstore/smi.c

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src/drivers: Use SPDX for GPL-2.0-only files Done with sed and God Lines. Only done for C-like code for now. Change-Id: I38eaffa391ed5971217ffad74a312b1641e431c9 Signed-off-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/40051 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
2020-04-02 23:48:19 +02:00
/* SPDX-License-Identifier: GPL-2.0-only */
smmstore: Add a key/val store facility in flash, mediated through SMM It exposes an interface that is as generic as possible, so payloads and/or kernels can use it for their data. Change-Id: I9553922f9dfa60b9d4b3576973ad4b84d3fe2fb5 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/25182 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-03-14 21:11:21 +01:00
#include <console/console.h>
smmstore: Verify userspace-provided pointer to protect SMM Use the introduced functions and verify pointers in the SMMSTORE. Make sure to not overwrite or leak data from SMM and update the documentation as well. Change-Id: I70df08657c3fa0f98917742d8e1a6cb1077e3758 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Signed-off-by: Christian Walter <christian.walter@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41085 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-05-06 10:57:01 +02:00
#include <commonlib/region.h>
Revert "src: Remove unused include <cpu/x86/smm.h>" This reverts commit 6f739184dd153e0f7c3fa42990e008578b51b2c1. Fixes compiling the SMMSTORE driver. Change-Id: I3b4d4063ded50529bea48f8d865c1689fe9e26d1 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/43970 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Reviewed-by: Michael Niewöhner Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2020-07-27 16:06:34 +02:00
#include <cpu/x86/smm.h>
smmstore: Add a key/val store facility in flash, mediated through SMM It exposes an interface that is as generic as possible, so payloads and/or kernels can use it for their data. Change-Id: I9553922f9dfa60b9d4b3576973ad4b84d3fe2fb5 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/25182 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-03-14 21:11:21 +01:00
#include <smmstore.h>
#include <stddef.h>
#include <stdint.h>
/*
* Check that the given range is legal.
*
* Legal means:
* - not pointing into SMRAM
*
* returns 0 on success, -1 on failure
*/
static int range_check(void *start, size_t size)
{
smmstore: Verify userspace-provided pointer to protect SMM Use the introduced functions and verify pointers in the SMMSTORE. Make sure to not overwrite or leak data from SMM and update the documentation as well. Change-Id: I70df08657c3fa0f98917742d8e1a6cb1077e3758 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Signed-off-by: Christian Walter <christian.walter@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41085 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-05-06 10:57:01 +02:00
if (smm_points_to_smram(start, size))
return -1;
smmstore: Add a key/val store facility in flash, mediated through SMM It exposes an interface that is as generic as possible, so payloads and/or kernels can use it for their data. Change-Id: I9553922f9dfa60b9d4b3576973ad4b84d3fe2fb5 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/25182 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-03-14 21:11:21 +01:00
return 0;
}
/* Param is usually EBX, ret in EAX */
uint32_t smmstore_exec(uint8_t command, void *param)
{
uint32_t ret = SMMSTORE_RET_FAILURE;
switch (command) {
case SMMSTORE_CMD_READ: {
printk(BIOS_DEBUG, "Reading from SMM store\n");
struct smmstore_params_read *params = param;
smmstore: Verify userspace-provided pointer to protect SMM Use the introduced functions and verify pointers in the SMMSTORE. Make sure to not overwrite or leak data from SMM and update the documentation as well. Change-Id: I70df08657c3fa0f98917742d8e1a6cb1077e3758 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Signed-off-by: Christian Walter <christian.walter@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41085 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-05-06 10:57:01 +02:00
if (range_check(params, sizeof(*params)) != 0)
break;
smmstore: Add a key/val store facility in flash, mediated through SMM It exposes an interface that is as generic as possible, so payloads and/or kernels can use it for their data. Change-Id: I9553922f9dfa60b9d4b3576973ad4b84d3fe2fb5 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/25182 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-03-14 21:11:21 +01:00
if (range_check(params->buf, params->bufsize) != 0)
break;
if (smmstore_read_region(params->buf, &params->bufsize) == 0)
ret = SMMSTORE_RET_SUCCESS;
break;
}
case SMMSTORE_CMD_APPEND: {
printk(BIOS_DEBUG, "Appending into SMM store\n");
struct smmstore_params_append *params = param;
smmstore: Verify userspace-provided pointer to protect SMM Use the introduced functions and verify pointers in the SMMSTORE. Make sure to not overwrite or leak data from SMM and update the documentation as well. Change-Id: I70df08657c3fa0f98917742d8e1a6cb1077e3758 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Signed-off-by: Christian Walter <christian.walter@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41085 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-05-06 10:57:01 +02:00
if (range_check(params, sizeof(*params)) != 0)
break;
smmstore: Add a key/val store facility in flash, mediated through SMM It exposes an interface that is as generic as possible, so payloads and/or kernels can use it for their data. Change-Id: I9553922f9dfa60b9d4b3576973ad4b84d3fe2fb5 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/25182 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-03-14 21:11:21 +01:00
if (range_check(params->key, params->keysize) != 0)
break;
if (range_check(params->val, params->valsize) != 0)
break;
if (smmstore_append_data(params->key, params->keysize,
params->val, params->valsize) == 0)
ret = SMMSTORE_RET_SUCCESS;
break;
}
case SMMSTORE_CMD_CLEAR: {
if (smmstore_clear_region() == 0)
ret = SMMSTORE_RET_SUCCESS;
break;
}
default:
printk(BIOS_DEBUG,
"Unknown SMM store command: 0x%02x\n", command);
ret = SMMSTORE_RET_UNSUPPORTED;
break;
}
return ret;
}
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