[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 42/62] arm/acpi: Prepare FADT table for Dom0
From: Shannon Zhao <shannon.zhao@xxxxxxxxxx> Copy and modify FADT table before passing it to Dom0. Set PSCI_COMPLIANT and PSCI_USE_HVC. Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx> --- xen/arch/arm/domain_build.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index b5ed44c..5d03dc0 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -1357,6 +1357,46 @@ static int prepare_dtb(struct domain *d, struct kernel_info *kinfo) } #ifdef CONFIG_ACPI +#define XEN_HYPERVISOR_ID 0x000058656E564D4D /* "XenVMM" */ + +static int acpi_create_fadt(struct domain *d, struct membank tbl_add[]) +{ + struct acpi_table_header *table = NULL; + struct acpi_table_fadt *fadt = NULL; + u64 table_size; + acpi_status status; + u8 *base_ptr; + u8 checksum; + + status = acpi_get_table(ACPI_SIG_FADT, 0, &table); + + if ( ACPI_FAILURE(status) ) + { + const char *msg = acpi_format_exception(status); + + printk("Failed to get FADT table, %s\n", msg); + return -EINVAL; + } + + table_size = table->length; + base_ptr = d->arch.efi_acpi_table + + acpi_get_table_offset(tbl_add, TBL_FADT); + ACPI_MEMCPY(base_ptr, table, table_size); + fadt = (struct acpi_table_fadt *)base_ptr; + + /* Set PSCI_COMPLIANT and PSCI_USE_HVC */ + fadt->arm_boot_flags |= (ACPI_FADT_PSCI_COMPLIANT | ACPI_FADT_PSCI_USE_HVC); + fadt->hypervisor_id = XEN_HYPERVISOR_ID; + checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, fadt), table_size); + fadt->header.checksum -= checksum; + + tbl_add[TBL_FADT].start = d->arch.efi_acpi_gpa + + acpi_get_table_offset(tbl_add, TBL_FADT); + tbl_add[TBL_FADT].size = table_size; + + return 0; +} + static int estimate_acpi_efi_size(struct domain *d, struct kernel_info *kinfo) { u64 efi_size, acpi_size = 0, addr; @@ -1400,6 +1440,7 @@ static int prepare_acpi(struct domain *d, struct kernel_info *kinfo) { int rc = 0; int order; + struct membank tbl_add[TBL_MMAX] = {}; rc = estimate_acpi_efi_size(d, kinfo); if ( rc != 0 ) @@ -1418,6 +1459,10 @@ static int prepare_acpi(struct domain *d, struct kernel_info *kinfo) * region. So we use it as the ACPI table mapped address. */ d->arch.efi_acpi_gpa = kinfo->gnttab_start; + rc = acpi_create_fadt(d, tbl_add); + if ( rc != 0 ) + return rc; + return 0; } #else -- 2.1.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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