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Date: Fri, 10 Dec 2021 10:46:14 -0600
From: Michael Roth <michael.roth@....com>
To: <linux-kselftest@...r.kernel.org>
CC: <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<x86@...nel.org>, Nathan Tempelman <natet@...gle.com>,
Marc Orr <marcorr@...gle.com>,
"Steve Rutherford" <srutherford@...gle.com>,
Sean Christopherson <seanjc@...gle.com>,
Mingwei Zhang <mizhang@...gle.com>,
Brijesh Singh <brijesh.singh@....com>,
Tom Lendacky <thomas.lendacky@....com>,
Varad Gautam <varad.gautam@...e.com>,
Shuah Khan <shuah@...nel.org>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
"David Woodhouse" <dwmw@...zon.co.uk>,
Ricardo Koller <ricarkol@...gle.com>,
"Jim Mattson" <jmattson@...gle.com>,
Joerg Roedel <joro@...tes.org>,
"Thomas Gleixner" <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"Borislav Petkov" <bp@...en8.de>,
"H . Peter Anvin" <hpa@...or.com>,
"Christian Borntraeger" <borntraeger@...ux.ibm.com>,
Janosch Frank <frankja@...ux.ibm.com>,
David Hildenbrand <david@...hat.com>,
"Claudio Imbrenda" <imbrenda@...ux.ibm.com>,
Marc Zyngier <maz@...nel.org>,
James Morse <james.morse@....com>,
Alexandru Elisei <alexandru.elisei@....com>,
"Suzuki K Poulose" <suzuki.poulose@....com>,
<kvmarm@...ts.cs.columbia.edu>
Subject: [PATCH RFC 04/10] kvm: arm64: selftests: use ucall_ops to define default ucall implementation
As with x86, switch the default ucall implementation to using the new
ucall_ops infrastructure. With this change ucall_init/ucall_uninit are
no longer arch-specific and can now be dropped in favor of the ones in
ucall_common.c.
Signed-off-by: Michael Roth <michael.roth@....com>
---
tools/testing/selftests/kvm/Makefile | 2 +-
.../selftests/kvm/include/aarch64/ucall.h | 18 ++++++++
.../testing/selftests/kvm/include/kvm_util.h | 2 +-
.../testing/selftests/kvm/lib/aarch64/ucall.c | 43 +++++++++----------
4 files changed, 40 insertions(+), 25 deletions(-)
create mode 100644 tools/testing/selftests/kvm/include/aarch64/ucall.h
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 05bff4039890..2d4299961d0e 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -35,7 +35,7 @@ endif
LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c
LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S lib/ucall_common.c
-LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c
+LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c lib/ucall_common.c
LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c
TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test
diff --git a/tools/testing/selftests/kvm/include/aarch64/ucall.h b/tools/testing/selftests/kvm/include/aarch64/ucall.h
new file mode 100644
index 000000000000..d3189d0a4d68
--- /dev/null
+++ b/tools/testing/selftests/kvm/include/aarch64/ucall.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Arch-specific ucall implementations.
+ *
+ * A ucall is a "hypercall to userspace".
+ *
+ * Copyright (C) 2021 Advanced Micro Devices
+ */
+#ifndef SELFTEST_KVM_UCALL_H
+#define SELFTEST_KVM_UCALL_H
+
+#include "ucall_common.h"
+
+extern const struct ucall_ops ucall_ops_mmio;
+
+extern const struct ucall_ops ucall_ops_default;
+
+#endif /* SELFTEST_KVM_UCALL_H */
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index 2701bf98c0db..16ec8c53cd81 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -14,7 +14,7 @@
* new header. Once all archs implement the new header the #include for
* ucall_common.h can be dropped.
*/
-#ifdef __x86_64__
+#if defined(__x86_64__) || defined (__aarch64__)
#include "ucall.h"
#else
#include "ucall_common.h"
diff --git a/tools/testing/selftests/kvm/lib/aarch64/ucall.c b/tools/testing/selftests/kvm/lib/aarch64/ucall.c
index e0b0164e9af8..ab052ab5d5de 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/ucall.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/ucall.c
@@ -1,11 +1,14 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * ucall support. A ucall is a "hypercall to userspace".
+ * Arch-specific ucall implementations.
+ *
+ * A ucall is a "hypercall to userspace".
*
* Copyright (C) 2018, Red Hat, Inc.
*/
-#include "kvm_util.h"
+#include "kvm_util_base.h"
#include "../kvm_util_internal.h"
+#include "ucall.h"
static vm_vaddr_t *ucall_exit_mmio_addr;
@@ -22,7 +25,7 @@ static bool ucall_mmio_init(struct kvm_vm *vm, vm_paddr_t gpa)
return true;
}
-void ucall_init(struct kvm_vm *vm, void *arg)
+static void ucall_ops_mmio_init(struct kvm_vm *vm, void *arg)
{
vm_paddr_t gpa, start, end, step, offset;
unsigned int bits;
@@ -65,38 +68,22 @@ void ucall_init(struct kvm_vm *vm, void *arg)
TEST_FAIL("Can't find a ucall mmio address");
}
-void ucall_uninit(struct kvm_vm *vm)
+static void ucall_ops_mmio_uninit(struct kvm_vm *vm)
{
ucall_exit_mmio_addr = 0;
sync_global_to_guest(vm, ucall_exit_mmio_addr);
}
-void ucall(uint64_t cmd, int nargs, ...)
+static void ucall_ops_mmio_send_cmd(struct ucall *uc)
{
- struct ucall uc = {
- .cmd = cmd,
- };
- va_list va;
- int i;
-
- nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
-
- va_start(va, nargs);
- for (i = 0; i < nargs; ++i)
- uc.args[i] = va_arg(va, uint64_t);
- va_end(va);
-
- *ucall_exit_mmio_addr = (vm_vaddr_t)&uc;
+ *ucall_exit_mmio_addr = (vm_vaddr_t)uc;
}
-uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc)
+static uint64_t ucall_ops_mmio_recv_cmd(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc)
{
struct kvm_run *run = vcpu_state(vm, vcpu_id);
struct ucall ucall = {};
- if (uc)
- memset(uc, 0, sizeof(*uc));
-
if (run->exit_reason == KVM_EXIT_MMIO &&
run->mmio.phys_addr == (uint64_t)ucall_exit_mmio_addr) {
vm_vaddr_t gva;
@@ -113,3 +100,13 @@ uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc)
return ucall.cmd;
}
+
+const struct ucall_ops ucall_ops_mmio = {
+ .name = "MMIO",
+ .init = ucall_ops_mmio_init,
+ .uninit = ucall_ops_mmio_uninit,
+ .send_cmd = ucall_ops_mmio_send_cmd,
+ .recv_cmd = ucall_ops_mmio_recv_cmd,
+};
+
+const struct ucall_ops ucall_ops_default = ucall_ops_mmio;
--
2.25.1
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