From: Oliver Upton <oliver.upton@linux.dev>
To: kvmarm@lists.linux.dev
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, Mark Rutland <mark.rutland@arm.com>,
	Lorenzo Pieralisi <lpieralisi@kernel.org>,
	Sudeep Holla <sudeep.holla@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Marc Zyngier <maz@kernel.org>,
	Oliver Upton <oliver.upton@linux.dev>,
	Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Subject: [PATCH] smccc: kvm_guest: Align with DISCOVER_IMPL_CPUS ABI
Date: Thu, 27 Mar 2025 09:36:15 -0700	[thread overview]
Message-ID: <20250327163613.2516073-1-oliver.upton@linux.dev> (raw)

The ABI of the hypercall requires that R2 and R3 are 0. Explicitly pass
0 for these parameters.

Cc: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Fixes: 86edf6bdcf05 ("smccc/kvm_guest: Enable errata based on implementation CPUs")
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
---
 drivers/firmware/smccc/kvm_guest.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/smccc/kvm_guest.c b/drivers/firmware/smccc/kvm_guest.c
index 5767aed25cdc..ac2d3cf8a776 100644
--- a/drivers/firmware/smccc/kvm_guest.c
+++ b/drivers/firmware/smccc/kvm_guest.c
@@ -95,7 +95,7 @@ void  __init kvm_arm_target_impl_cpu_init(void)
 
 	for (i = 0; i < max_cpus; i++) {
 		arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_KVM_DISCOVER_IMPL_CPUS_FUNC_ID,
-				     i, &res);
+				     i, 0, 0, &res);
 		if (res.a0 != SMCCC_RET_SUCCESS) {
 			pr_warn("Discovering target implementation CPUs failed\n");
 			goto mem_free;

base-commit: 369c0122682c4468a69f2454614eded71c5348f3
-- 
2.39.5

next             reply	other threads:[~2025-03-27 16:38 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-03-27 16:36 Oliver Upton [this message]
2025-03-31  6:54 ` [PATCH] smccc: kvm_guest: Align with DISCOVER_IMPL_CPUS ABI Shameerali Kolothum Thodi
2025-04-01 16:40 ` Oliver Upton

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