public inbox for linux-riscv@lists.infradead.org
 help / color / mirror / Atom feed
From: Christian Borntraeger <borntraeger@linux.ibm.com>
To: Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Marc Zyngier <maz@kernel.org>, Anup Patel <anup@brainfault.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Janosch Frank <frankja@linux.ibm.com>,
	Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: James Morse <james.morse@arm.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Atish Patra <atishp@atishpatra.org>,
	David Hildenbrand <david@redhat.com>,
	kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm-riscv@lists.infradead.org,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	Colton Lewis <coltonlewis@google.com>,
	Andrew Jones <drjones@redhat.com>
Subject: Re: [PATCH 1/3] KVM: selftests: Consolidate common code for popuplating ucall struct
Date: Mon, 20 Jun 2022 09:39:50 +0200	[thread overview]
Message-ID: <6518c2f2-476c-9f12-5a07-974af95a0b42@linux.ibm.com> (raw)
In-Reply-To: <20220618001618.1840806-2-seanjc@google.com>



Am 18.06.22 um 02:16 schrieb Sean Christopherson:
> Make ucall() a common helper that populates struct ucall, and only calls
> into arch code to make the actually call out to userspace.
> 
> Rename all arch-specific helpers to make it clear they're arch-specific,
> and to avoid collisions with common helpers (one more on its way...)
> 
> No functional change intended.
> 
> Cc: Colton Lewis <coltonlewis@google.com>
> Cc: Andrew Jones <drjones@redhat.com>
> Signed-off-by: Sean Christopherson <seanjc@google.com>

seems to work on s390.
Tested-by: Christian Borntraeger <borntraeger@linux.ibm.com>

> ---
>   tools/testing/selftests/kvm/Makefile          |  1 +
>   .../selftests/kvm/include/ucall_common.h      | 23 ++++++++++++++++---
>   .../testing/selftests/kvm/lib/aarch64/ucall.c | 23 ++++---------------
>   tools/testing/selftests/kvm/lib/riscv/ucall.c | 23 ++++---------------
>   tools/testing/selftests/kvm/lib/s390x/ucall.c | 23 ++++---------------
>   .../testing/selftests/kvm/lib/ucall_common.c  | 20 ++++++++++++++++
>   .../testing/selftests/kvm/lib/x86_64/ucall.c  | 23 ++++---------------
>   7 files changed, 61 insertions(+), 75 deletions(-)
>   create mode 100644 tools/testing/selftests/kvm/lib/ucall_common.c
> 
> diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
> index b52c130f7b2f..bc2aee2af66c 100644
> --- a/tools/testing/selftests/kvm/Makefile
> +++ b/tools/testing/selftests/kvm/Makefile
> @@ -46,6 +46,7 @@ LIBKVM += lib/perf_test_util.c
>   LIBKVM += lib/rbtree.c
>   LIBKVM += lib/sparsebit.c
>   LIBKVM += lib/test_util.c
> +LIBKVM += lib/ucall_common.c
>   
>   LIBKVM_x86_64 += lib/x86_64/apic.c
>   LIBKVM_x86_64 += lib/x86_64/handlers.S
> diff --git a/tools/testing/selftests/kvm/include/ucall_common.h b/tools/testing/selftests/kvm/include/ucall_common.h
> index 98562f685151..c6a4fd7fe443 100644
> --- a/tools/testing/selftests/kvm/include/ucall_common.h
> +++ b/tools/testing/selftests/kvm/include/ucall_common.h
> @@ -23,10 +23,27 @@ struct ucall {
>   	uint64_t args[UCALL_MAX_ARGS];
>   };
>   
> -void ucall_init(struct kvm_vm *vm, void *arg);
> -void ucall_uninit(struct kvm_vm *vm);
> +void ucall_arch_init(struct kvm_vm *vm, void *arg);
> +void ucall_arch_uninit(struct kvm_vm *vm);
> +void ucall_arch_do_ucall(vm_vaddr_t uc);
> +uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc);
> +
>   void ucall(uint64_t cmd, int nargs, ...);
> -uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc);
> +
> +static inline void ucall_init(struct kvm_vm *vm, void *arg)
> +{
> +	ucall_arch_init(vm, arg);
> +}
> +
> +static inline void ucall_uninit(struct kvm_vm *vm)
> +{
> +	ucall_arch_uninit(vm);
> +}
> +
> +static inline uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
> +{
> +	return ucall_arch_get_ucall(vcpu, uc);
> +}
>   
>   #define GUEST_SYNC_ARGS(stage, arg1, arg2, arg3, arg4)	\
>   				ucall(UCALL_SYNC, 6, "hello", stage, arg1, arg2, arg3, arg4)
> diff --git a/tools/testing/selftests/kvm/lib/aarch64/ucall.c b/tools/testing/selftests/kvm/lib/aarch64/ucall.c
> index 0b949ee06b5e..2de9fdd34159 100644
> --- a/tools/testing/selftests/kvm/lib/aarch64/ucall.c
> +++ b/tools/testing/selftests/kvm/lib/aarch64/ucall.c
> @@ -21,7 +21,7 @@ static bool ucall_mmio_init(struct kvm_vm *vm, vm_paddr_t gpa)
>   	return true;
>   }
>   
> -void ucall_init(struct kvm_vm *vm, void *arg)
> +void ucall_arch_init(struct kvm_vm *vm, void *arg)
>   {
>   	vm_paddr_t gpa, start, end, step, offset;
>   	unsigned int bits;
> @@ -64,31 +64,18 @@ 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)
> +void ucall_arch_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, ...)
> +void ucall_arch_do_ucall(vm_vaddr_t uc)
>   {
> -	struct ucall uc = {
> -		.cmd = cmd,
> -	};
> -	va_list va;
> -	int i;
> -
> -	nargs = min(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 = uc;
>   }
>   
> -uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
> +uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
>   {
>   	struct kvm_run *run = vcpu->run;
>   	struct ucall ucall = {};
> diff --git a/tools/testing/selftests/kvm/lib/riscv/ucall.c b/tools/testing/selftests/kvm/lib/riscv/ucall.c
> index 087b9740bc8f..b1598f418c1f 100644
> --- a/tools/testing/selftests/kvm/lib/riscv/ucall.c
> +++ b/tools/testing/selftests/kvm/lib/riscv/ucall.c
> @@ -10,11 +10,11 @@
>   #include "kvm_util.h"
>   #include "processor.h"
>   
> -void ucall_init(struct kvm_vm *vm, void *arg)
> +void ucall_arch_init(struct kvm_vm *vm, void *arg)
>   {
>   }
>   
> -void ucall_uninit(struct kvm_vm *vm)
> +void ucall_arch_uninit(struct kvm_vm *vm)
>   {
>   }
>   
> @@ -44,27 +44,14 @@ struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
>   	return ret;
>   }
>   
> -void ucall(uint64_t cmd, int nargs, ...)
> +void ucall_arch_do_ucall(vm_vaddr_t uc)
>   {
> -	struct ucall uc = {
> -		.cmd = cmd,
> -	};
> -	va_list va;
> -	int i;
> -
> -	nargs = min(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);
> -
>   	sbi_ecall(KVM_RISCV_SELFTESTS_SBI_EXT,
>   		  KVM_RISCV_SELFTESTS_SBI_UCALL,
> -		  (vm_vaddr_t)&uc, 0, 0, 0, 0, 0);
> +		  uc, 0, 0, 0, 0, 0);
>   }
>   
> -uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
> +uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
>   {
>   	struct kvm_run *run = vcpu->run;
>   	struct ucall ucall = {};
> diff --git a/tools/testing/selftests/kvm/lib/s390x/ucall.c b/tools/testing/selftests/kvm/lib/s390x/ucall.c
> index 73dc4e21190f..114cb4af295f 100644
> --- a/tools/testing/selftests/kvm/lib/s390x/ucall.c
> +++ b/tools/testing/selftests/kvm/lib/s390x/ucall.c
> @@ -6,34 +6,21 @@
>    */
>   #include "kvm_util.h"
>   
> -void ucall_init(struct kvm_vm *vm, void *arg)
> +void ucall_arch_init(struct kvm_vm *vm, void *arg)
>   {
>   }
>   
> -void ucall_uninit(struct kvm_vm *vm)
> +void ucall_arch_uninit(struct kvm_vm *vm)
>   {
>   }
>   
> -void ucall(uint64_t cmd, int nargs, ...)
> +void ucall_arch_do_ucall(vm_vaddr_t uc)
>   {
> -	struct ucall uc = {
> -		.cmd = cmd,
> -	};
> -	va_list va;
> -	int i;
> -
> -	nargs = min(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);
> -
>   	/* Exit via DIAGNOSE 0x501 (normally used for breakpoints) */
> -	asm volatile ("diag 0,%0,0x501" : : "a"(&uc) : "memory");
> +	asm volatile ("diag 0,%0,0x501" : : "a"(uc) : "memory");
>   }
>   
> -uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
> +uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
>   {
>   	struct kvm_run *run = vcpu->run;
>   	struct ucall ucall = {};
> diff --git a/tools/testing/selftests/kvm/lib/ucall_common.c b/tools/testing/selftests/kvm/lib/ucall_common.c
> new file mode 100644
> index 000000000000..749ffdf23855
> --- /dev/null
> +++ b/tools/testing/selftests/kvm/lib/ucall_common.c
> @@ -0,0 +1,20 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +#include "kvm_util.h"
> +
> +void ucall(uint64_t cmd, int nargs, ...)
> +{
> +	struct ucall uc = {
> +		.cmd = cmd,
> +	};
> +	va_list va;
> +	int i;
> +
> +	nargs = min(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_arch_do_ucall((vm_vaddr_t)&uc);
> +}
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/ucall.c b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
> index e5f0f9e0d3ee..9f532dba1003 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/ucall.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
> @@ -8,34 +8,21 @@
>   
>   #define UCALL_PIO_PORT ((uint16_t)0x1000)
>   
> -void ucall_init(struct kvm_vm *vm, void *arg)
> +void ucall_arch_init(struct kvm_vm *vm, void *arg)
>   {
>   }
>   
> -void ucall_uninit(struct kvm_vm *vm)
> +void ucall_arch_uninit(struct kvm_vm *vm)
>   {
>   }
>   
> -void ucall(uint64_t cmd, int nargs, ...)
> +void ucall_arch_do_ucall(vm_vaddr_t uc)
>   {
> -	struct ucall uc = {
> -		.cmd = cmd,
> -	};
> -	va_list va;
> -	int i;
> -
> -	nargs = min(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);
> -
>   	asm volatile("in %[port], %%al"
> -		: : [port] "d" (UCALL_PIO_PORT), "D" (&uc) : "rax", "memory");
> +		: : [port] "d" (UCALL_PIO_PORT), "D" (uc) : "rax", "memory");
>   }
>   
> -uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
> +uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
>   {
>   	struct kvm_run *run = vcpu->run;
>   	struct ucall ucall = {};

_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

  reply	other threads:[~2022-06-20  7:40 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-18  0:16 [PATCH 0/3] KVM: selftests: Consolidate ucall code Sean Christopherson
2022-06-18  0:16 ` [PATCH 1/3] KVM: selftests: Consolidate common code for popuplating ucall struct Sean Christopherson
2022-06-20  7:39   ` Christian Borntraeger [this message]
2022-06-18  0:16 ` [PATCH 2/3] KVM: selftests: Consolidate boilerplate code in get_ucall() Sean Christopherson
2022-06-19 10:36   ` Huang, Shaoqin
2022-06-21 14:41     ` Sean Christopherson
2022-06-18  0:16 ` [PATCH 3/3] KVM: selftest: Add __weak stubs for ucall_arch_(un)init() Sean Christopherson
2022-06-20  7:33 ` [PATCH 0/3] KVM: selftests: Consolidate ucall code Andrew Jones
2022-06-20 12:03 ` Paolo Bonzini
2022-06-21 14:54   ` Sean Christopherson
2022-07-15 19:32     ` Peter Gonda

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=6518c2f2-476c-9f12-5a07-974af95a0b42@linux.ibm.com \
    --to=borntraeger@linux.ibm.com \
    --cc=alexandru.elisei@arm.com \
    --cc=anup@brainfault.org \
    --cc=aou@eecs.berkeley.edu \
    --cc=atishp@atishpatra.org \
    --cc=coltonlewis@google.com \
    --cc=david@redhat.com \
    --cc=drjones@redhat.com \
    --cc=frankja@linux.ibm.com \
    --cc=imbrenda@linux.ibm.com \
    --cc=james.morse@arm.com \
    --cc=kvm-riscv@lists.infradead.org \
    --cc=kvm@vger.kernel.org \
    --cc=kvmarm@lists.cs.columbia.edu \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-riscv@lists.infradead.org \
    --cc=maz@kernel.org \
    --cc=palmer@dabbelt.com \
    --cc=paul.walmsley@sifive.com \
    --cc=pbonzini@redhat.com \
    --cc=seanjc@google.com \
    --cc=suzuki.poulose@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox