Commit 4e2c8794 authored by Mario Limonciello's avatar Mario Limonciello Committed by Herbert Xu
Browse files

crypto: ccp - When TSME and SME both detected notify user 



CC_ATTR_HOST_MEM_ENCRYPT is used to relay that memory encryption has been
activated by the kernel.

As it's technically possible to enable both SME and TSME at the same time,
detect this scenario and notify the user that enabling TSME and SME at the
same time is unnecessary.

Signed-off-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Acked-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 84ee393b

drivers/crypto/ccp/psp-dev.c

+6 −0
Original line number Diff line number Diff line
@@ -74,6 +74,12 @@ static unsigned int psp_get_capability(struct psp_device *psp) 
	}

	psp->capability = val;



	/* Detect if TSME and SME are both enabled */

	if (psp->capability & PSP_CAPABILITY_PSP_SECURITY_REPORTING &&

	    psp->capability & (PSP_SECURITY_TSME_STATUS << PSP_CAPABILITY_PSP_SECURITY_OFFSET) &&

	    cc_platform_has(CC_ATTR_HOST_MEM_ENCRYPT))

		dev_notice(psp->dev, "psp: Both TSME and SME are active, SME is unnecessary when TSME is active.\n");



	return 0;

}