From c376e7ae1e055929205a262ff63ca1ddedfdedc7 Mon Sep 17 00:00:00 2001 From: Shannon Zhao Date: Wed, 30 Mar 2016 12:12:00 +0200 Subject: [PATCH] arm/acpi: Map the new created EFI and ACPI tables to Dom0 Map the UEFI and ACPI tables which we created to non-RAM space in Dom0. Signed-off-by: Shannon Zhao Reviewed-by: Stefano Stabellini Acked-by: Julien Grall --- xen/arch/arm/domain_build.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index dd4a8babd8..ba75d3b73a 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -1723,6 +1723,28 @@ static int prepare_acpi(struct domain *d, struct kernel_info *kinfo) acpi_create_efi_system_table(d, tbl_add); acpi_create_efi_mmap_table(d, &kinfo->mem, tbl_add); + /* Map the EFI and ACPI tables to Dom0 */ + rc = map_regions_rw_cache(d, + paddr_to_pfn(d->arch.efi_acpi_gpa), + PFN_UP(d->arch.efi_acpi_len), + paddr_to_pfn(virt_to_maddr(d->arch.efi_acpi_table))); + if ( rc != 0 ) + { + printk(XENLOG_ERR "Unable to map EFI/ACPI table 0x%"PRIx64 + " - 0x%"PRIx64" in domain %d\n", + d->arch.efi_acpi_gpa & PAGE_MASK, + PAGE_ALIGN(d->arch.efi_acpi_gpa + d->arch.efi_acpi_len) - 1, + d->domain_id); + return rc; + } + + /* + * Flush the cache for this region, otherwise DOM0 may read wrong data when + * the cache is disabled. + */ + clean_and_invalidate_dcache_va_range(d->arch.efi_acpi_table, + d->arch.efi_acpi_len); + return 0; } #else -- 2.30.2