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From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: will@kernel.org, qperret@google.com, dbrazdil@google.com,
	Steven Price <steven.price@arm.com>,
	Andrew Jones <drjones@redhat.com>, Fuad Tabba <tabba@google.com>,
	Srivatsa Vaddagiri <vatsa@codeaurora.org>,
	Shanker R Donthineni <sdonthineni@nvidia.com>,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	kernel-team@android.com
Subject: [PATCH v2 11/16] firmware/smccc: Call arch-specific hook on discovering KVM services
Date: Mon,  4 Oct 2021 18:48:44 +0100	[thread overview]
Message-ID: <20211004174849.2831548-12-maz@kernel.org> (raw)
In-Reply-To: <20211004174849.2831548-1-maz@kernel.org>

arm64 will soon require its own callback to initialise services
that are only availably on this architecture. Introduce a hook
that can be overloaded by the architecture.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm/include/asm/hypervisor.h   | 1 +
 arch/arm64/include/asm/hypervisor.h | 1 +
 drivers/firmware/smccc/kvm_guest.c  | 4 ++++
 3 files changed, 6 insertions(+)

diff --git a/arch/arm/include/asm/hypervisor.h b/arch/arm/include/asm/hypervisor.h
index bd61502b9715..8133c8c81a35 100644
--- a/arch/arm/include/asm/hypervisor.h
+++ b/arch/arm/include/asm/hypervisor.h
@@ -6,5 +6,6 @@
 
 void kvm_init_hyp_services(void);
 bool kvm_arm_hyp_service_available(u32 func_id);
+void kvm_arm_init_hyp_services(void);
 
 #endif
diff --git a/arch/arm64/include/asm/hypervisor.h b/arch/arm64/include/asm/hypervisor.h
index 0ae427f352c8..8e77f411903f 100644
--- a/arch/arm64/include/asm/hypervisor.h
+++ b/arch/arm64/include/asm/hypervisor.h
@@ -6,5 +6,6 @@
 
 void kvm_init_hyp_services(void);
 bool kvm_arm_hyp_service_available(u32 func_id);
+void kvm_arm_init_hyp_services(void);
 
 #endif
diff --git a/drivers/firmware/smccc/kvm_guest.c b/drivers/firmware/smccc/kvm_guest.c
index 2d3e866decaa..56169e73252a 100644
--- a/drivers/firmware/smccc/kvm_guest.c
+++ b/drivers/firmware/smccc/kvm_guest.c
@@ -9,6 +9,8 @@
 
 #include <asm/hypervisor.h>
 
+void __weak kvm_arm_init_hyp_services(void) {}
+
 static DECLARE_BITMAP(__kvm_arm_hyp_services, ARM_SMCCC_KVM_NUM_FUNCS) __ro_after_init = { };
 
 void __init kvm_init_hyp_services(void)
@@ -38,6 +40,8 @@ void __init kvm_init_hyp_services(void)
 
 	pr_info("hypervisor services detected (0x%08lx 0x%08lx 0x%08lx 0x%08lx)\n",
 		 res.a3, res.a2, res.a1, res.a0);
+
+	kvm_arm_init_hyp_services();
 }
 
 bool kvm_arm_hyp_service_available(u32 func_id)
-- 
2.30.2


  parent reply	other threads:[~2021-10-04 17:56 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-04 17:48 [PATCH v2 00/16] KVM: arm64: MMIO guard PV services Marc Zyngier
2021-10-04 17:48 ` [PATCH v2 01/16] KVM: arm64: Generalise VM features into a set of flags Marc Zyngier
2021-10-06 10:24   ` Andrew Jones
2021-10-04 17:48 ` [PATCH v2 02/16] KVM: arm64: Check for PTE valitity when checking for executable/cacheable Marc Zyngier
2021-10-06 10:41   ` Andrew Jones
2021-10-04 17:48 ` [PATCH v2 03/16] KVM: arm64: Turn kvm_pgtable_stage2_set_owner into kvm_pgtable_stage2_annotate Marc Zyngier
2021-10-06 11:02   ` Andrew Jones
2021-10-06 11:22     ` Andrew Jones
2021-10-04 17:48 ` [PATCH v2 04/16] KVM: arm64: Add MMIO checking infrastructure Marc Zyngier
2021-10-06 11:37   ` Andrew Jones
2021-10-04 17:48 ` [PATCH v2 05/16] KVM: arm64: Plumb MMIO checking into the fault handling Marc Zyngier
2021-10-04 17:48 ` [PATCH v2 06/16] KVM: arm64: Force a full unmap on vpcu reinit Marc Zyngier
2021-10-07 13:49   ` Andrew Jones
2021-10-04 17:48 ` [PATCH v2 07/16] KVM: arm64: Wire MMIO guard hypercalls Marc Zyngier
2021-10-07 13:53   ` Andrew Jones
2021-10-04 17:48 ` [PATCH v2 08/16] KVM: arm64: Add tracepoint for failed MMIO guard check Marc Zyngier
2021-10-04 17:48 ` [PATCH v2 09/16] KVM: arm64: Advertise a capability for MMIO guard Marc Zyngier
2021-10-07 14:22   ` Andrew Jones
2021-10-04 17:48 ` [PATCH v2 10/16] KVM: arm64: Add some documentation for the MMIO guard feature Marc Zyngier
2021-10-07 14:38   ` Andrew Jones
2021-10-07 14:42   ` Andrew Jones
2021-10-04 17:48 ` Marc Zyngier [this message]
2021-10-04 17:48 ` [PATCH v2 12/16] mm/vmalloc: Add arch-specific callbacks to track io{remap,unmap} physical pages Marc Zyngier
2021-10-04 17:48 ` [PATCH v2 13/16] arm64: Implement ioremap/iounmap hooks calling into KVM's MMIO guard Marc Zyngier
2021-10-07 15:36   ` Andrew Jones
2021-10-04 17:48 ` [PATCH v2 14/16] arm64: Enroll into KVM's MMIO guard if required Marc Zyngier
2021-10-04 17:48 ` [PATCH v2 15/16] arm64: Add a helper to retrieve the PTE of a fixmap Marc Zyngier
2021-10-04 17:48 ` [PATCH v2 16/16] arm64: Register earlycon fixmap with the MMIO guard Marc Zyngier
2021-10-07 15:52 ` [PATCH v2 00/16] KVM: arm64: MMIO guard PV services Andrew Jones

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