[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20210319100146.1149909-9-qperret@google.com>
Date: Fri, 19 Mar 2021 10:01:16 +0000
From: Quentin Perret <qperret@...gle.com>
To: catalin.marinas@....com, will@...nel.org, maz@...nel.org,
james.morse@....com, julien.thierry.kdev@...il.com,
suzuki.poulose@....com
Cc: android-kvm@...gle.com, seanjc@...gle.com, mate.toth-pal@....com,
linux-kernel@...r.kernel.org, robh+dt@...nel.org,
linux-arm-kernel@...ts.infradead.org, kernel-team@...roid.com,
kvmarm@...ts.cs.columbia.edu, tabba@...gle.com, ardb@...nel.org,
mark.rutland@....com, dbrazdil@...gle.com, qperret@...gle.com
Subject: [PATCH v6 08/38] KVM: arm64: Make kvm_call_hyp() a function call at Hyp
kvm_call_hyp() has some logic to issue a function call or a hypercall
depending on the EL at which the kernel is running. However, all the
code compiled under __KVM_NVHE_HYPERVISOR__ is guaranteed to only run
at EL2 which allows us to simplify.
Add ifdefery to kvm_host.h to simplify kvm_call_hyp() in .hyp.text.
Acked-by: Will Deacon <will@...nel.org>
Signed-off-by: Quentin Perret <qperret@...gle.com>
---
arch/arm64/include/asm/kvm_host.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 08f500b2551a..6a2031af9562 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -593,6 +593,7 @@ int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
void kvm_arm_halt_guest(struct kvm *kvm);
void kvm_arm_resume_guest(struct kvm *kvm);
+#ifndef __KVM_NVHE_HYPERVISOR__
#define kvm_call_hyp_nvhe(f, ...) \
({ \
struct arm_smccc_res res; \
@@ -632,6 +633,11 @@ void kvm_arm_resume_guest(struct kvm *kvm);
\
ret; \
})
+#else /* __KVM_NVHE_HYPERVISOR__ */
+#define kvm_call_hyp(f, ...) f(__VA_ARGS__)
+#define kvm_call_hyp_ret(f, ...) f(__VA_ARGS__)
+#define kvm_call_hyp_nvhe(f, ...) f(__VA_ARGS__)
+#endif /* __KVM_NVHE_HYPERVISOR__ */
void force_vm_exit(const cpumask_t *mask);
void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
--
2.31.0.rc2.261.g7f71774620-goog
Powered by blists - more mailing lists