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Merge tag 'smccc-updates-6.17' of https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into soc/drivers

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firmware: smccc: Update for v6.17

Just a single update extending arm_smccc_hypervisor_has_uuid() to
support both SMC and HVC conduits, enabling UUID retrieval when Linux
runs as the root partition under Microsoft Hypervisor (MSHV), where
SMC is used. It leverages arm_smccc_1_1_invoke() to dynamically select
the appropriate conduit, enhancing compatibility beyond just HVC.

* tag 'smccc-updates-6.17' of https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  firmware: smccc: Support both smc and hvc conduits for getting hyp UUID

Link: https://lore.kernel.org/r/20250709122615.1171419-1-sudeep.holla@arm.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann
2025-07-21 16:40:21 +02:00
parent 5f931b5684 1733432638
commit 7edf259b11
1 changed files with 1 additions and 4 deletions
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drivers/firmware/smccc/smccc.c
+1 -4
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@@ -72,10 +72,7 @@ bool arm_smccc_hypervisor_has_uuid(const uuid_t *hyp_uuid)
struct arm_smccc_res res = {};
uuid_t uuid;
if (arm_smccc_1_1_get_conduit() != SMCCC_CONDUIT_HVC)
return false;
arm_smccc_1_1_hvc(ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID, &res);
arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID, &res);
if (res.a0 == SMCCC_RET_NOT_SUPPORTED)
return false;