From: Julien Grall <julien@xen.org>
To: Pavel Tatashin <pasha.tatashin@soleen.com>,
jmorris@namei.org, sashal@kernel.org,
linux-kernel@vger.kernel.org, catalin.marinas@arm.com,
will@kernel.org, steve.capper@arm.com,
linux-arm-kernel@lists.infradead.org, marc.zyngier@arm.com,
james.morse@arm.com, vladimir.murzin@arm.com,
mark.rutland@arm.com, tglx@linutronix.de,
gregkh@linuxfoundation.org, allison@lohutok.net, info@metux.net,
alexios.zavras@intel.com, sstabellini@kernel.org,
boris.ostrovsky@oracle.com, jgross@suse.com, stefan@agner.ch,
yamada.masahiro@socionext.com, xen-devel@lists.xenproject.org,
linux@armlinux.org.uk
Subject: Re: [PATCH 1/3] arm/arm64/xen: use C inlines for privcmd_call
Date: Fri, 29 Nov 2019 15:05:11 +0000 [thread overview]
Message-ID: <957930d0-8317-9086-c7a1-8de857f358c2@xen.org> (raw)
In-Reply-To: <20191127184453.229321-2-pasha.tatashin@soleen.com>
Hi,
On 27/11/2019 18:44, Pavel Tatashin wrote:
> diff --git a/arch/arm64/include/asm/xen/hypercall.h b/arch/arm64/include/asm/xen/hypercall.h
> index 3522cbaed316..1a74fb28607f 100644
> --- a/arch/arm64/include/asm/xen/hypercall.h
> +++ b/arch/arm64/include/asm/xen/hypercall.h
> @@ -1 +1,29 @@
> +#ifndef _ASM_ARM64_XEN_HYPERCALL_H
> +#define _ASM_ARM64_XEN_HYPERCALL_H
> #include <xen/arm/hypercall.h>
> +#include <linux/uaccess.h>
> +
> +static inline long privcmd_call(unsigned int call, unsigned long a1,
> + unsigned long a2, unsigned long a3,
> + unsigned long a4, unsigned long a5)
I realize that privcmd_call is the only hypercall using Software PAN at
the moment. However, dm_op needs the same as hypercall will be issued
from userspace as well.
So I was wondering whether we should create a generic function (e.g.
do_xen_hypercall() or do_xen_user_hypercall()) to cover the two hypercalls?
> diff --git a/include/xen/arm/hypercall.h b/include/xen/arm/hypercall.h
> index b40485e54d80..624c8ad7e42a 100644
> --- a/include/xen/arm/hypercall.h
> +++ b/include/xen/arm/hypercall.h
> @@ -30,8 +30,8 @@
> * IN THE SOFTWARE.
> */
>
> -#ifndef _ASM_ARM_XEN_HYPERCALL_H
> -#define _ASM_ARM_XEN_HYPERCALL_H
> +#ifndef _ARM_XEN_HYPERCALL_H
> +#define _ARM_XEN_HYPERCALL_H
This change feels a bit out of context. Could you split it in a separate
patch?
>
> #include <linux/bug.h>
>
> @@ -41,9 +41,9 @@
>
> struct xen_dm_op_buf;
>
> -long privcmd_call(unsigned call, unsigned long a1,
> - unsigned long a2, unsigned long a3,
> - unsigned long a4, unsigned long a5);
> +long arch_privcmd_call(unsigned int call, unsigned long a1,
> + unsigned long a2, unsigned long a3,
> + unsigned long a4, unsigned long a5);
> int HYPERVISOR_xen_version(int cmd, void *arg);
> int HYPERVISOR_console_io(int cmd, int count, char *str);
> int HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count);
> @@ -88,4 +88,4 @@ MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
> BUG();
> }
>
> -#endif /* _ASM_ARM_XEN_HYPERCALL_H */
> +#endif /* _ARM_XEN_HYPERCALL_H */
>
Cheers,
--
Julien Grall
next prev parent reply other threads:[~2019-11-29 15:05 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-27 18:44 [PATCH 0/3] Use C inlines for uaccess Pavel Tatashin
2019-11-27 18:44 ` [PATCH 1/3] arm/arm64/xen: use C inlines for privcmd_call Pavel Tatashin
2019-11-29 15:05 ` Julien Grall [this message]
2019-11-29 15:09 ` [Xen-devel] " Andrew Cooper
2019-12-04 17:55 ` Pavel Tatashin
2019-12-04 17:58 ` Pavel Tatashin
2019-11-27 18:44 ` [PATCH 2/3] arm64: remove uaccess_ttbr0 asm macros from cache functions Pavel Tatashin
2019-11-28 14:51 ` Mark Rutland
2019-12-04 20:50 ` Pavel Tatashin
2019-11-27 18:44 ` [PATCH 3/3] arm64: remove the rest of asm-uaccess.h Pavel Tatashin
2019-11-27 18:46 ` [PATCH 0/3] Use C inlines for uaccess Pavel Tatashin
-- strict thread matches above, loose matches on Subject: below --
2019-11-21 18:48 Pavel Tatashin
2019-11-21 18:48 ` [PATCH 1/3] arm/arm64/xen: use C inlines for privcmd_call Pavel Tatashin
2019-11-22 0:22 ` Russell King - ARM Linux admin
2019-11-22 0:30 ` Pavel Tatashin
2019-11-22 0:34 ` Russell King - ARM Linux admin
2019-11-22 0:35 ` Russell King - ARM Linux admin
2019-11-22 0:39 ` Pavel Tatashin
2019-11-22 0:53 ` Russell King - ARM Linux admin
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