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HV: parse default pci mmcfg base

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The default PCI mmcfg base is stored in ACPI MCFG table, when
CONFIG_ACPI_PARSE_ENABLED is set, acpi_fixup() function will
parse and fix up the platform mmcfg base in ACRN boot stage;
when it is not set, platform mmcfg base will be initialized to
DEFAULT_PCI_MMCFG_BASE which generated by acrn-config tool;

Please note we will not support platform which has multiple PCI
segment groups.

Tracked-On: #4157

Signed-off-by: Victor Sun <victor.sun@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Victor Sun
2019-11-27 13:39:52 +08:00
committed by wenlingz
parent 80a7281f1e
commit 15da33d8af
8 changed files with 72 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
hypervisor/acpi_parser/acpi_ext.c
View File

@@ -33,6 +33,7 @@
#include <ioapic.h>
#include <logmsg.h>
#include <host_pm.h>
#include <pci.h>
#include <acrn_common.h>
/* Per ACPI spec:
@@ -111,15 +112,30 @@ static void *get_facs_table(const uint8_t *facp_addr)
return (void *)facs_addr;
}
/* put all ACPI fix up code here */
void acpi_fixup(void)
/* @pre mcfg_addr != NULL */
static uint64_t parse_mmcfg_base(const uint8_t *mcfg_addr)
{
uint8_t *facp_addr, *facs_addr;
uint64_t base = 0UL;
uint32_t length = get_acpi_dt_dword(mcfg_addr, OFFSET_MCFG_LENGTH);
if (length > OFFSET_MCFG_ENTRY1) {
pr_fatal("Multiple PCI segment groups is not supported!");
} else {
base = get_acpi_dt_qword(mcfg_addr, OFFSET_MCFG_ENTRY0_BASE);
}
return base;
}
/* put all ACPI fix up code here */
int32_t acpi_fixup(void)
{
uint8_t *facp_addr = NULL, *facs_addr = NULL, *mcfg_addr = NULL;
uint64_t def_mmcfg_base = 0UL;
int32_t ret = 0;
struct acpi_generic_address pm1a_cnt, pm1a_evt;
struct pm_s_state_data *sx_data = get_host_sstate_data();
facp_addr = (uint8_t *)get_acpi_tbl(ACPI_SIG_FADT);
if (facp_addr != NULL) {
get_acpi_dt_gas(facp_addr, OFFSET_PM1A_EVT, &pm1a_evt);
get_acpi_dt_gas(facp_addr, OFFSET_PM1A_CNT, &pm1a_cnt);
@@ -143,4 +159,17 @@ void acpi_fixup(void)
rr_data->val = *(facp_addr + OFFSET_RESET_VALUE);
}
}
mcfg_addr = (uint8_t *)get_acpi_tbl(ACPI_SIG_MCFG);
if (mcfg_addr != NULL) {
def_mmcfg_base = parse_mmcfg_base(mcfg_addr);
set_mmcfg_base(def_mmcfg_base);
}
if ((facp_addr == NULL) || (facs_addr == NULL)
|| (mcfg_addr == NULL) || (def_mmcfg_base == 0UL)) {
ret = -1;
}
return ret;
}