Commit cc17982d authored by Peter Gonda's avatar Peter Gonda Committed by Herbert Xu
Browse files

crypto: ccp - Refactor out sev_fw_alloc() 



Create a helper function sev_fw_alloc() which can be used to allocate
aligned memory regions for use by the PSP firmware. Currently only used
for the SEV-ES TMR region but will be used for the SEV_INIT_EX NV memory
region.

Signed-off-by: default avatarPeter Gonda <pgonda@google.com>
Reviewed-by: default avatarMarc Orr <marcorr@google.com>
Acked-by: default avatarDavid Rientjes <rientjes@google.com>
Acked-by: default avatarBrijesh Singh <brijesh.singh@amd.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Marc Orr <marcorr@google.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: David Rientjes <rientjes@google.com>
Cc: John Allen <john.allen@amd.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent e423b9d7

drivers/crypto/ccp/sev-dev.c

+13 −7
Original line number Diff line number Diff line
@@ -141,6 +141,17 @@ static int sev_cmd_buffer_len(int cmd) 
	return 0;

}



static void *sev_fw_alloc(unsigned long len)

{

	struct page *page;



	page = alloc_pages(GFP_KERNEL, get_order(len));

	if (!page)

		return NULL;



	return page_address(page);

}



static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret)

{

	struct psp_device *psp = psp_master;
@@ -1078,7 +1089,6 @@ EXPORT_SYMBOL_GPL(sev_issue_cmd_external_user); 
void sev_pci_init(void)

{

	struct sev_device *sev = psp_master->sev_data;

	struct page *tmr_page;

	int error, rc;



	if (!sev)
@@ -1094,14 +1104,10 @@ void sev_pci_init(void) 
		sev_get_api_version();



	/* Obtain the TMR memory area for SEV-ES use */

	tmr_page = alloc_pages(GFP_KERNEL, get_order(SEV_ES_TMR_SIZE));

	if (tmr_page) {

		sev_es_tmr = page_address(tmr_page);

	} else {

		sev_es_tmr = NULL;

	sev_es_tmr = sev_fw_alloc(SEV_ES_TMR_SIZE);

	if (!sev_es_tmr)

		dev_warn(sev->dev,

			 "SEV: TMR allocation failed, SEV-ES support unavailable\n");

	}



	/* Initialize the platform */

	rc = sev_platform_init(&error);