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Commit 3a8663ee authored by Ben Hutchings's avatar Ben Hutchings Committed by David Woodhouse
Browse files

intel-iommu: Combine the BIOS DMAR table warning messages 



We have nearly the same code for warnings repeated four times.  Move
it into a separate function.

Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 92946bc7

drivers/pci/dmar.c

+14 −34
Original line number Diff line number Diff line
@@ -618,7 +618,15 @@ int __init dmar_table_init(void) 
	return 0;

}



static int bios_warned;

static void warn_invalid_dmar(u64 addr, const char *message)

{

	WARN_ONCE(1, "Your BIOS is broken; DMAR reported at address %llx%s!\n"

		  "BIOS vendor: %s; Ver: %s; Product Version: %s\n",

		  addr, message,

		  dmi_get_system_info(DMI_BIOS_VENDOR),

		  dmi_get_system_info(DMI_BIOS_VERSION),

		  dmi_get_system_info(DMI_PRODUCT_VERSION));

}



int __init check_zero_address(void)

{
@@ -644,13 +652,7 @@ int __init check_zero_address(void) 


			drhd = (void *)entry_header;

			if (!drhd->address) {

				/* Promote an attitude of violence to a BIOS engineer today */

				WARN(1, "Your BIOS is broken; DMAR reported at address zero!\n"

				     "BIOS vendor: %s; Ver: %s; Product Version: %s\n",

				     dmi_get_system_info(DMI_BIOS_VENDOR),

				     dmi_get_system_info(DMI_BIOS_VERSION),

				     dmi_get_system_info(DMI_PRODUCT_VERSION));

				bios_warned = 1;

				warn_invalid_dmar(0, "");

				goto failed;

			}
@@ -663,14 +665,8 @@ int __init check_zero_address(void) 
			ecap = dmar_readq(addr + DMAR_ECAP_REG);

			early_iounmap(addr, VTD_PAGE_SIZE);

			if (cap == (uint64_t)-1 && ecap == (uint64_t)-1) {

				/* Promote an attitude of violence to a BIOS engineer today */

				WARN(1, "Your BIOS is broken; DMAR reported at address %llx returns all ones!\n"

				     "BIOS vendor: %s; Ver: %s; Product Version: %s\n",

				      drhd->address,

				      dmi_get_system_info(DMI_BIOS_VENDOR),

				      dmi_get_system_info(DMI_BIOS_VERSION),

				      dmi_get_system_info(DMI_PRODUCT_VERSION));

				bios_warned = 1;

				warn_invalid_dmar(drhd->address,

						  " returns all ones");

				goto failed;

			}

		}
@@ -735,14 +731,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) 
	int msagaw = 0;



	if (!drhd->reg_base_addr) {

		if (!bios_warned) {

			WARN(1, "Your BIOS is broken; DMAR reported at address zero!\n"

			     "BIOS vendor: %s; Ver: %s; Product Version: %s\n",

			     dmi_get_system_info(DMI_BIOS_VENDOR),

			     dmi_get_system_info(DMI_BIOS_VERSION),

			     dmi_get_system_info(DMI_PRODUCT_VERSION));

			bios_warned = 1;

		}

		warn_invalid_dmar(0, "");

		return -EINVAL;

	}
@@ -762,16 +751,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) 
	iommu->ecap = dmar_readq(iommu->reg + DMAR_ECAP_REG);



	if (iommu->cap == (uint64_t)-1 && iommu->ecap == (uint64_t)-1) {

		if (!bios_warned) {

			/* Promote an attitude of violence to a BIOS engineer today */

			WARN(1, "Your BIOS is broken; DMAR reported at address %llx returns all ones!\n"

			     "BIOS vendor: %s; Ver: %s; Product Version: %s\n",

			     drhd->reg_base_addr,

			     dmi_get_system_info(DMI_BIOS_VENDOR),

			     dmi_get_system_info(DMI_BIOS_VERSION),

			     dmi_get_system_info(DMI_PRODUCT_VERSION));

			bios_warned = 1;

		}

		warn_invalid_dmar(drhd->reg_base_addr, " returns all ones");

		goto err_unmap;

	}