[RFC PATCH v3 08/11] coco: guest: arm64: Verify DA evidence with RSI_VDEV_GET_INFO digests

["Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>]

Add guest-side evidence verification based on RSI_VDEV_GET_INFO and use the
verified TDISP interface report to validate Realm MMIO mappings.

During lock:
- refresh host caches from device
- read certificate/VCA/interface-report/measurement objects from host cache
- fetch trusted digest metadata from RSI_VDEV_GET_INFO
- verify host-provided objects against RSI digests
- initialize and populate PCI TSM evidence objects
- preserve lock/meas/report nonces and digests in guest state

Add mapping helpers to walk MMIO entries from the TDISP report and perform
RSI_VDEV_VALIDATE_MAPPING on map, or RIPAS destroy on unmap. Reject malformed
range progress while validating.

During unlock:
- invalidate mappings derived from the evidence report
- unlock the device and tear down MMIO bookkeeping

This ensures host-cached DA objects are cryptographically verified before
being trusted for mapping and attestation state transitions.

Cc: Marc Zyngier <maz@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Alexey Kardashevskiy <aik@amd.com>
Cc: Samuel Ortiz <sameo@rivosinc.com>
Cc: Xu Yilun <yilun.xu@linux.intel.com>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Steven Price <steven.price@arm.com>
Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
---
 arch/arm64/include/asm/rsi_cmds.h         |  40 +++
 arch/arm64/include/asm/rsi_smc.h          |  48 ++++
 drivers/virt/coco/arm-cca-guest/Kconfig   |   2 +
 drivers/virt/coco/arm-cca-guest/arm-cca.c | 287 +++++++++++++++++++++-
 drivers/virt/coco/arm-cca-guest/rsi-da.c  | 145 +++++++++++
 drivers/virt/coco/arm-cca-guest/rsi-da.h  |  22 ++
 6 files changed, 533 insertions(+), 11 deletions(-)

diff --git a/arch/arm64/include/asm/rsi_cmds.h b/arch/arm64/include/asm/rsi_cmds.h
index 596bdc356f1a..f72d8e0cd422 100644
--- a/arch/arm64/include/asm/rsi_cmds.h
+++ b/arch/arm64/include/asm/rsi_cmds.h
@@ -186,4 +186,44 @@ static inline unsigned long rsi_features(unsigned long index, u64 *out)
 	return res.a0;
 }
 
+static inline long
+rsi_vdev_validate_mapping(unsigned long vdev_id,
+			  phys_addr_t ipa_base, phys_addr_t ipa_top,
+			  phys_addr_t pa_base, phys_addr_t *next_ipa,
+			  unsigned long flags, unsigned long lock_nonce,
+			  unsigned long meas_nonce, unsigned long report_nonce)
+{
+	struct arm_smccc_1_2_regs res;
+	struct arm_smccc_1_2_regs regs = {
+		.a0 = SMC_RSI_VDEV_VALIDATE_MAPPING,
+		.a1 = vdev_id,
+		.a2 = ipa_base,
+		.a3 = ipa_top,
+		.a4 = pa_base,
+		.a5 = flags,
+		.a6 = lock_nonce,
+		.a7 = meas_nonce,
+		.a8 = report_nonce,
+	};
+
+	arm_smccc_1_2_invoke(&regs, &res);
+	*next_ipa = res.a1;
+
+	if (res.a2 != RSI_ACCEPT)
+		return -EPERM;
+
+	return res.a0;
+}
+
+static inline unsigned long rsi_vdev_get_info(unsigned long vdev_id,
+					      unsigned long digest_phys)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_1_1_invoke(SMC_RSI_VDEV_GET_INFO,
+			     vdev_id, digest_phys, &res);
+
+	return res.a0;
+}
+
 #endif /* __ASM_RSI_CMDS_H */
diff --git a/arch/arm64/include/asm/rsi_smc.h b/arch/arm64/include/asm/rsi_smc.h
index 4af4638fdd49..5f1837282237 100644
--- a/arch/arm64/include/asm/rsi_smc.h
+++ b/arch/arm64/include/asm/rsi_smc.h
@@ -125,6 +125,9 @@
 
 #ifndef __ASSEMBLER__
 
+#define RSI_HASH_SHA_256 0
+#define RSI_HASH_SHA_512 1
+
 struct realm_config {
 	union {
 		struct {
@@ -183,6 +186,51 @@ struct realm_config {
  */
 #define SMC_RSI_IPA_STATE_GET			SMC_RSI_FID(0x198)
 
+struct rsi_vdevice_info {
+	union {
+		struct {
+			u64 flags;
+			u64 cert_id;
+			union {
+				u8 hash_algo;
+				u64 padding0;
+			};
+			u64 lock_nonce;
+			u64 meas_nonce;
+			u64 report_nonce;
+			u64 tdisp_version;
+			union {
+				u8 state;
+				u64 padding1;
+			};
+
+		};
+		u8 padding2[0x40];
+	};
+	union { /* 0x40  */
+		struct {
+			u8 vca_digest[0x40];
+			u8 cert_digest[0x40];
+			u8 pubkey_digest[0x40];
+			u8 meas_digest[0x40];
+			u8 report_digest[0x40];
+		};
+		u8 padding3[0x200 - 0x40];
+	};
+};
+
+/*
+ * Get information for a device.
+ * arg1 == Realm device identifier (vdev id)
+ * arg2 == IPA to which configuration data will be written
+ * ret0 == Status / error
+ */
+#define SMC_RSI_VDEV_GET_INFO			SMC_RSI_FID(0x19D)
+
+#define RSI_DEV_MEM_COHERENT		BIT(0)
+#define RSI_DEV_MEM_LIMITED_ORDER	BIT(1)
+#define SMC_RSI_VDEV_VALIDATE_MAPPING		SMC_RSI_FID(0x19F)
+
 struct rsi_host_call {
 	union {
 		u16 imm;
diff --git a/drivers/virt/coco/arm-cca-guest/Kconfig b/drivers/virt/coco/arm-cca-guest/Kconfig
index d295146bd92a..8ed4b95df5e4 100644
--- a/drivers/virt/coco/arm-cca-guest/Kconfig
+++ b/drivers/virt/coco/arm-cca-guest/Kconfig
@@ -5,6 +5,8 @@ config ARM_CCA_GUEST
 	tristate "Arm CCA Guest driver"
 	depends on ARM64
 	select PCI_TSM if PCI
+	select CRYPTO_LIB_SHA256
+	select CRYPTO_LIB_SHA512
 	select TSM_REPORTS
 	select AUXILIARY_BUS
 	help
diff --git a/drivers/virt/coco/arm-cca-guest/arm-cca.c b/drivers/virt/coco/arm-cca-guest/arm-cca.c
index 435645e97ab4..80ee20c8a7a6 100644
--- a/drivers/virt/coco/arm-cca-guest/arm-cca.c
+++ b/drivers/virt/coco/arm-cca-guest/arm-cca.c
@@ -198,39 +198,304 @@ static void unregister_cca_tsm_report(void *data)
 }
 
 #ifdef CONFIG_PCI_TSM
+
+static int __maybe_unused
+cca_update_dev_measurements(struct pci_dev *pdev, const u8 *nonce)
+{
+	int ret;
+	void *measurements;
+	int measurements_size;
+	int vdev_id = rsi_vdev_id(pdev);
+	struct pci_tsm_evidence *evidence;
+	struct rsi_vdevice_info *dev_info;
+	struct pci_tsm_evidence_object *obj;
+	struct cca_guest_dsc *dsc = to_cca_guest_dsc(pdev);
+
+	/* Regenerate the measurement from the device */
+	ret = rhi_update_vdev_measurements_cache(pdev, nonce);
+	if (ret) {
+		pci_err(pdev, "failed to update device measurements from device (%d)\n", ret);
+		return ret;
+	}
+
+	ret = rhi_read_cached_object(vdev_id, RHI_DA_OBJECT_MEASUREMENT,
+				     &measurements, &measurements_size);
+	if (ret) {
+		pci_err(pdev, "failed to get device measurements from the host (%d)\n", ret);
+		return ret;
+	}
+
+	dev_info = kmalloc(sizeof(*dev_info), GFP_KERNEL);
+	if (!dev_info) {
+		ret = -ENOMEM;
+		goto free_measurements;
+	}
+
+	if (rsi_vdev_get_info(vdev_id, virt_to_phys(dev_info))) {
+		pci_err(pdev, "failed to get device digests (%d)\n", ret);
+		ret = -EIO;
+		goto free_dev_info;
+	}
+
+	/* Make sure no unexpected lock/unlock operation happened from guest */
+	if (dsc->dev_info.lock_nonce != dev_info->lock_nonce) {
+		pci_err(pdev, "Unexpected lock/unlock operation from host (%d)\n", ret);
+		ret = -EIO;
+		goto free_dev_info;
+	}
+
+	/*
+	 * Verify that the digests of the provided reports match with the
+	 * digests from RMM
+	 */
+	ret = cca_verify_digest(dev_info->hash_algo, measurements,
+				measurements_size, dev_info->meas_digest);
+	if (ret) {
+		pci_err(pdev, "RMM provided digest mismatch (%d)\n", ret);
+		goto free_dev_info;
+	}
+
+	/* fill evidence details */
+	evidence = &dsc->pci.base_tsm.evidence;
+
+	/* Now update the evidence under lock. */
+	down_write(&evidence->lock);
+	evidence->generation = dev_info->meas_nonce;
+
+	obj = &evidence->obj[PCI_TSM_EVIDENCE_TYPE_MEASUREMENTS];
+	if (obj->data)
+		kvfree(obj->data);
+	obj->data = measurements;
+	obj->len = measurements_size;
+
+	dsc->dev_info.meas_nonce    = dev_info->meas_nonce;
+	memcpy(dsc->dev_info.meas_digest, dev_info->meas_digest, SHA512_DIGEST_SIZE);
+	up_write(&evidence->lock);
+
+	kfree(dev_info);
+	return 0;
+
+free_dev_info:
+	kfree(dev_info);
+free_measurements:
+	kvfree(measurements);
+	return ret;
+}
+
+static int cca_collect_dev_evidence(struct pci_dev *pdev, struct cca_guest_dsc *dsc)
+{
+	int ret;
+	int vdev_id = rsi_vdev_id(pdev);
+	struct pci_tsm_evidence *evidence;
+	struct rsi_vdevice_info *dev_info;
+	struct pci_tsm_evidence_object *obj;
+	void *certificate, *vca, *interface_report, *measurements;
+	int certificate_size, vca_size, interface_report_size, measurements_size;
+
+	/* Regenerate interface report and measurement from the device */
+	ret = cca_update_device_object_cache(pdev, NULL);
+	if (ret) {
+		pci_err(pdev, "failed to update device objects from device (%d)\n", ret);
+		return ret;
+	}
+
+	ret = rhi_read_cached_object(vdev_id, RHI_DA_OBJECT_CERTIFICATE,
+				     &certificate, &certificate_size);
+	if (ret) {
+		pci_err(pdev, "failed to get device certificate from the host (%d)\n", ret);
+		return ret;
+	}
+
+	ret = rhi_read_cached_object(vdev_id, RHI_DA_OBJECT_VCA, &vca, &vca_size);
+	if (ret) {
+		pci_err(pdev, "failed to get device VCA from the host (%d)\n", ret);
+		goto free_certificate;
+	}
+
+	ret = rhi_read_cached_object(vdev_id, RHI_DA_OBJECT_INTERFACE_REPORT,
+				     &interface_report, &interface_report_size);
+	if (ret) {
+		pci_err(pdev, "failed to get interface report from the host (%d)\n", ret);
+		goto free_vca;
+	}
+
+	ret = rhi_read_cached_object(vdev_id, RHI_DA_OBJECT_MEASUREMENT,
+				     &measurements, &measurements_size);
+	if (ret) {
+		pci_err(pdev, "failed to get device certificate from the host (%d)\n", ret);
+		goto free_interface_report;
+	}
+
+	dev_info = kmalloc(sizeof(*dev_info), GFP_KERNEL);
+	if (!dev_info) {
+		ret = -ENOMEM;
+		goto free_measurements;
+	}
+
+	if (rsi_vdev_get_info(vdev_id, virt_to_phys(dev_info))) {
+		pci_err(pdev, "failed to get device digests (%d)\n", ret);
+		ret = -EIO;
+		goto free_dev_info;
+	}
+
+	/* Make sure no unexpected lock/unlock operation happened from guest */
+	if (dsc->dev_info.lock_nonce != dev_info->lock_nonce) {
+		pci_err(pdev, "Unexpected lock/unlock operation from host (%d)\n", ret);
+		ret = -EIO;
+		goto free_dev_info;
+	}
+
+	/*
+	 * Verify that the digests of the provided reports match with the
+	 * digests from RMM
+	 */
+	ret = cca_verify_digests(dev_info->hash_algo, certificate,
+				 certificate_size, vca, vca_size,
+				 interface_report, interface_report_size,
+				 measurements, measurements_size, dev_info);
+	if (ret) {
+		pci_err(pdev, "RMM provided digest mismatch (%d)\n", ret);
+		goto free_dev_info;
+	}
+
+	/* fill evidence details */
+	evidence = &dsc->pci.base_tsm.evidence;
+
+	/* Now update the evidence under lock. */
+	down_write(&evidence->lock);
+	evidence->generation = dev_info->meas_nonce;
+
+	/* we default to slot 0 in pdev_create */
+	obj = &evidence->obj[PCI_TSM_EVIDENCE_TYPE_CERT0];
+	WARN_ON(obj->data);
+	obj->data = certificate;
+	obj->len = certificate_size;
+
+	obj = &evidence->obj[PCI_TSM_EVIDENCE_TYPE_VCA];
+	WARN_ON(obj->data);
+	obj->data = vca;
+	obj->len = vca_size;
+
+	obj = &evidence->obj[PCI_TSM_EVIDENCE_TYPE_REPORT];
+	WARN_ON(obj->data);
+	obj->data = interface_report;
+	obj->len = interface_report_size;
+
+	obj = &evidence->obj[PCI_TSM_EVIDENCE_TYPE_MEASUREMENTS];
+	WARN_ON(obj->data);
+	obj->data = measurements;
+	obj->len = measurements_size;
+
+	dsc->dev_info.meas_nonce    = dev_info->meas_nonce;
+	dsc->dev_info.report_nonce  = dev_info->report_nonce;
+	memcpy(dsc->dev_info.cert_digest, dev_info->cert_digest, SHA512_DIGEST_SIZE);
+	memcpy(dsc->dev_info.vca_digest, dev_info->vca_digest, SHA512_DIGEST_SIZE);
+	memcpy(dsc->dev_info.meas_digest, dev_info->meas_digest, SHA512_DIGEST_SIZE);
+	memcpy(dsc->dev_info.report_digest, dev_info->report_digest, SHA512_DIGEST_SIZE);
+	up_write(&evidence->lock);
+
+	kfree(dev_info);
+	return 0;
+
+free_dev_info:
+	kfree(dev_info);
+free_measurements:
+	kvfree(measurements);
+free_interface_report:
+	kvfree(interface_report);
+free_vca:
+	kvfree(vca);
+free_certificate:
+	kvfree(certificate);
+	return ret;
+}
+
 static struct pci_tsm *cca_tsm_lock(struct tsm_dev *tsm_dev, struct pci_dev *pdev)
 {
 	int ret;
+	enum hash_algo digest_algo;
+	struct cca_guest_dsc *cca_dsc;
+	int vdev_id = rsi_vdev_id(pdev);
+	struct rsi_vdevice_info *dev_info;
 
-	struct cca_guest_dsc *cca_dsc __free(kfree) =
-		kzalloc_obj(struct cca_guest_dsc);
+	cca_dsc = kzalloc_obj(struct cca_guest_dsc);
 	if (!cca_dsc)
 		return ERR_PTR(-ENOMEM);
 
 	ret = pci_tsm_devsec_constructor(pdev, &cca_dsc->pci, tsm_dev);
 	if (ret)
-		return ERR_PTR(ret);
+		goto free_cca_dsc;
 
 	ret = cca_device_lock(pdev);
 	if (ret)
-		return ERR_PTR(ret);
+		goto free_cca_dsc;
 
-	/* collect evidence without nonce */
-	ret = cca_update_device_object_cache(pdev, NULL);
-	if (ret) {
-		cca_device_unlock(pdev);
-		return ERR_PTR(ret);
+	dev_info = kmalloc_obj(struct rsi_vdevice_info);
+	if (!dev_info) {
+		ret = -ENOMEM;
+		goto dev_unlock;
+	}
+
+	if (rsi_vdev_get_info(vdev_id, virt_to_phys(dev_info))) {
+		ret = -EIO;
+		goto free_dev_info;
+	}
+
+	/* collect the lock nonce */
+	cca_dsc->dev_info.lock_nonce = dev_info->lock_nonce;
+
+	switch (dev_info->hash_algo) {
+	case RSI_HASH_SHA_256:
+		digest_algo = HASH_ALGO_SHA256;
+		break;
+	case RSI_HASH_SHA_512:
+		digest_algo = HASH_ALGO_SHA512;
+		break;
+	default:
+		ret = -EIO;
+		goto free_dev_info;
 	}
+	pci_tsm_init_evidence(&cca_dsc->pci.base_tsm.evidence,
+			      dev_info->cert_id, digest_algo);
 
-	return &no_free_ptr(cca_dsc)->pci.base_tsm;
+	/* collect evidence without nonce */
+	ret = cca_collect_dev_evidence(pdev, cca_dsc);
+	if (ret)
+		goto free_dev_info;
+
+	kfree(dev_info);
+	return &cca_dsc->pci.base_tsm;
+
+free_dev_info:
+	kfree(dev_info);
+dev_unlock:
+	cca_device_unlock(pdev);
+free_cca_dsc:
+	kfree(cca_dsc);
+	return ERR_PTR(ret);
 }
 
 static void cca_tsm_unlock(struct pci_tsm *tsm)
 {
-	struct cca_guest_dsc *cca_dsc = to_cca_guest_dsc(tsm->pdev);
+	long ret;
+	struct pci_dev *pdev = tsm->pdev;
+	struct cca_guest_dsc *cca_dsc = to_cca_guest_dsc(pdev);
+
+	/* invalidate dev mapping based on interface report */
+	ret = cca_unmap_evidence_report_range(tsm->pdev);
+	if (ret) {
+		pci_err(tsm->pdev, "failed to invalidate the interface report\n");
+		goto err_out;
+	}
 
 	cca_device_unlock(tsm->pdev);
+	pci_tsm_mmio_teardown(cca_dsc->pci.mmio);
 
+err_out:
+	/*
+	 * No error handling from this function. Leave the device locked
+	 */
+	pci_tsm_mmio_free(tsm->pdev, cca_dsc->pci.mmio);
 	kfree(cca_dsc);
 }
 
diff --git a/drivers/virt/coco/arm-cca-guest/rsi-da.c b/drivers/virt/coco/arm-cca-guest/rsi-da.c
index 9f9e54174813..6f40329ac2f9 100644
--- a/drivers/virt/coco/arm-cca-guest/rsi-da.c
+++ b/drivers/virt/coco/arm-cca-guest/rsi-da.c
@@ -6,6 +6,7 @@
 #include <linux/pci.h>
 #include <linux/mem_encrypt.h>
 #include <asm/rsi_cmds.h>
+#include <crypto/hash.h>
 
 #include "rsi-da.h"
 #include "rhi-da.h"
@@ -85,3 +86,147 @@ int cca_update_device_object_cache(struct pci_dev *pdev, const u8 *nonce)
 
 	return rhi_update_vdev_measurements_cache(pdev, nonce);
 }
+
+static inline int
+rsi_validate_dev_mapping(unsigned long vdev_id, phys_addr_t start_ipa,
+			 phys_addr_t end_ipa, phys_addr_t io_pa,
+			 unsigned long flags, unsigned long lock_nonce,
+			 unsigned long meas_nonce, unsigned long report_nonce)
+{
+	unsigned long ret;
+	phys_addr_t next_ipa;
+
+	while (start_ipa < end_ipa) {
+		ret = rsi_vdev_validate_mapping(vdev_id, start_ipa, end_ipa,
+						io_pa, &next_ipa, flags,
+						lock_nonce, meas_nonce, report_nonce);
+		if (ret || next_ipa <= start_ipa || next_ipa > end_ipa)
+			return -EINVAL;
+		io_pa += next_ipa - start_ipa;
+		start_ipa = next_ipa;
+	}
+	return 0;
+}
+
+static inline int rsi_invalidate_dev_mapping(phys_addr_t start_ipa, phys_addr_t end_ipa)
+{
+	return rsi_set_memory_range(start_ipa, end_ipa, RSI_RIPAS_EMPTY,
+				    RSI_CHANGE_DESTROYED);
+}
+
+static int cca_apply_evidence_report_range(struct pci_dev *pdev,
+					   struct pci_tsm_mmio *mmio, bool map)
+{
+	int i, ret;
+	struct resource *res;
+	unsigned long mmio_flags = 0; /* non coherent, not limited order */
+	int vdev_id = rsi_vdev_id(pdev);
+	struct pci_tsm_mmio_entry *entry;
+	struct cca_guest_dsc *dsc = to_cca_guest_dsc(pdev);
+
+	for (i = 0; i < mmio->nr; i++) {
+		entry = pci_tsm_mmio_entry(mmio, i);
+		res = &entry->res;
+
+		if (res->desc != IORES_DESC_ENCRYPTED)
+			continue;
+
+		if (map)
+			ret = rsi_validate_dev_mapping(vdev_id, res->start,
+						       res->end + 1, entry->tsm_offset,
+						       mmio_flags,
+						       dsc->dev_info.lock_nonce,
+						       dsc->dev_info.meas_nonce,
+						       dsc->dev_info.report_nonce);
+		else
+			ret = rsi_invalidate_dev_mapping(res->start, res->end + 1);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+int cca_map_evidence_report_range(struct pci_dev *pdev, struct pci_tsm_mmio *mmio)
+{
+	return cca_apply_evidence_report_range(pdev, mmio, true);
+}
+
+int cca_unmap_evidence_report_range(struct pci_dev *pdev)
+{
+	struct cca_guest_dsc *dsc = to_cca_guest_dsc(pdev);
+	struct pci_tsm_mmio *tsm_mmio = dsc->pci.mmio;
+
+	return cca_apply_evidence_report_range(pdev, tsm_mmio, false);
+}
+
+int cca_verify_digest(u64 hash_algo, uint8_t *report,
+		      size_t report_size, uint8_t *report_digest)
+{
+	u8 digest[SHA512_DIGEST_SIZE];
+	size_t digest_size;
+	void (*digest_func)(const u8 *data, size_t len, u8 *out);
+
+	switch (hash_algo) {
+	case RSI_HASH_SHA_256:
+		digest_func = sha256;
+		digest_size = SHA256_DIGEST_SIZE;
+		break;
+	case RSI_HASH_SHA_512:
+		digest_func = sha512;
+		digest_size = SHA512_DIGEST_SIZE;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	digest_func(report, report_size, digest);
+	if (memcmp(report_digest, digest, digest_size))
+		return -EINVAL;
+
+	return 0;
+}
+
+int cca_verify_digests(u64 hash_algo,
+		       uint8_t *certificate, size_t certificate_size,
+		       uint8_t *vca, size_t vca_size,
+		       uint8_t *interface_report, size_t interface_report_size,
+		       uint8_t *measurements, size_t measurements_size,
+		       struct rsi_vdevice_info *dev_info)
+{
+	int ret;
+	struct {
+		uint8_t *report;
+		size_t size;
+		uint8_t *digest;
+	} reports[] = {
+		{
+			certificate,
+			certificate_size,
+			dev_info->cert_digest
+		},
+		{
+			vca,
+			vca_size,
+			dev_info->vca_digest
+		},
+		{
+			interface_report,
+			interface_report_size,
+			dev_info->report_digest
+		},
+		{
+			measurements,
+			measurements_size,
+			dev_info->meas_digest
+		}
+
+	};
+
+	for (int i = 0; i < ARRAY_SIZE(reports); i++) {
+		ret = cca_verify_digest(hash_algo, reports[i].report,
+					reports[i].size, reports[i].digest);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
diff --git a/drivers/virt/coco/arm-cca-guest/rsi-da.h b/drivers/virt/coco/arm-cca-guest/rsi-da.h
index f28dc44b5cd2..4903a770412e 100644
--- a/drivers/virt/coco/arm-cca-guest/rsi-da.h
+++ b/drivers/virt/coco/arm-cca-guest/rsi-da.h
@@ -9,11 +9,23 @@
 #include <linux/pci.h>
 #include <linux/pci-tsm.h>
 #include <asm/rsi_smc.h>
+#include <crypto/sha2.h>
 
 #define MAX_CACHE_OBJ_SIZE	SZ_16M
 
+struct dsm_device_info {
+	u64 lock_nonce;
+	u64 meas_nonce;
+	u64 report_nonce;
+	u8 cert_digest[SHA512_DIGEST_SIZE];
+	u8 vca_digest[SHA512_DIGEST_SIZE];
+	u8 meas_digest[SHA512_DIGEST_SIZE];
+	u8 report_digest[SHA512_DIGEST_SIZE];
+};
+
 struct cca_guest_dsc {
 	struct pci_tsm_devsec pci;
+	struct dsm_device_info dev_info;
 };
 
 static inline struct cca_guest_dsc *to_cca_guest_dsc(struct pci_dev *pdev)
@@ -39,4 +51,14 @@ int cca_device_unlock(struct pci_dev *pdev);
 int cca_update_device_object_cache(struct pci_dev *pdev, const u8 *nonce);
 struct page *alloc_shared_pages(int nid, gfp_t gfp_mask, unsigned long min_size);
 int free_shared_pages(struct page *page, unsigned long min_size);
+int cca_map_evidence_report_range(struct pci_dev *pdev, struct pci_tsm_mmio *mmio);
+int cca_unmap_evidence_report_range(struct pci_dev *pdev);
+int cca_verify_digest(u64 hash_algo, uint8_t *report,
+		      size_t report_size, uint8_t *report_digest);
+int cca_verify_digests(u64 hash_algo,
+		       uint8_t *certificate, size_t certificate_size,
+		       uint8_t *vca, size_t vca_size,
+		       uint8_t *interface_report, size_t interface_report_size,
+		       uint8_t *measurements, size_t measurements_size,
+		       struct rsi_vdevice_info *dev_info);
 #endif
-- 
2.43.0