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From: Christoph Hellwig <hch@lst.de>
To: Guo Ren <guoren@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>, Anup Patel <anup.patel@wdc.com>,
	Palmer Dabbelt <palmerdabbelt@google.com>,
	Arnd Bergmann <arnd@arndb.de>,
	linux-riscv <linux-riscv@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-arch <linux-arch@vger.kernel.org>,
	linux-sunxi@lists.linux.dev, Guo Ren <guoren@linux.alibaba.com>
Subject: Re: [PATCH V3 2/2] riscv: Use use_asid_allocator flush TLB
Date: Wed, 26 May 2021 07:23:08 +0200	[thread overview]
Message-ID: <20210526052308.GA29213@lst.de> (raw)
In-Reply-To: <CAJF2gTSa3LJKTRBv6NOvg0HtoKPL-5YyP6wY2=AJhQtAZwBBzg@mail.gmail.com>

On Wed, May 26, 2021 at 11:12:40AM +0800, Guo Ren wrote:
> > static inline void local_flush_tlb_range_asid(unsigned long start,
> >                 unsigned long size, unsigned long asid)
> >
> > > +{
> > > +     unsigned long tmp = start & PAGE_MASK;
> > > +     unsigned long end = ALIGN(start + size, PAGE_SIZE);
> > > +
> > > +     if (size == -1) {
> > > +             __asm__ __volatile__ ("sfence.vma x0, %0" : : "r" (asid) : "memory");
> > > +             return;
> >
> > Please split the global (size == -1) case into separate helpers.
> Do you mean:

No.  Basically a

static inline void local_flush_tlb_ll_asid(unsigned long asid)
{
	__asm__ __volatile__ ("sfence.vma x0, %0"
				:
				: "r" (asid)
				: "memory");
}

and

static inline void local_flush_tlb_range_asid(unsigned long start,
		unsigned long size, unsigned long asid)

{
	unsigned long end = ALIGN(start + size, PAGE_SIZE), tmp;

	for (tmp = start & PAGE_MASK; tmp < end; tmp += PAGE_SIZE) {
		__asm__ __volatile__ ("sfence.vma %0, %1"
					:
					: "r" (tmp), "r" (asid)
					: "memory");
	}
}

WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Guo Ren <guoren@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>, Anup Patel <anup.patel@wdc.com>,
	Palmer Dabbelt <palmerdabbelt@google.com>,
	Arnd Bergmann <arnd@arndb.de>,
	linux-riscv <linux-riscv@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-arch <linux-arch@vger.kernel.org>,
	linux-sunxi@lists.linux.dev, Guo Ren <guoren@linux.alibaba.com>
Subject: Re: [PATCH V3 2/2] riscv: Use use_asid_allocator flush TLB
Date: Wed, 26 May 2021 07:23:08 +0200	[thread overview]
Message-ID: <20210526052308.GA29213@lst.de> (raw)
In-Reply-To: <CAJF2gTSa3LJKTRBv6NOvg0HtoKPL-5YyP6wY2=AJhQtAZwBBzg@mail.gmail.com>

On Wed, May 26, 2021 at 11:12:40AM +0800, Guo Ren wrote:
> > static inline void local_flush_tlb_range_asid(unsigned long start,
> >                 unsigned long size, unsigned long asid)
> >
> > > +{
> > > +     unsigned long tmp = start & PAGE_MASK;
> > > +     unsigned long end = ALIGN(start + size, PAGE_SIZE);
> > > +
> > > +     if (size == -1) {
> > > +             __asm__ __volatile__ ("sfence.vma x0, %0" : : "r" (asid) : "memory");
> > > +             return;
> >
> > Please split the global (size == -1) case into separate helpers.
> Do you mean:

No.  Basically a

static inline void local_flush_tlb_ll_asid(unsigned long asid)
{
	__asm__ __volatile__ ("sfence.vma x0, %0"
				:
				: "r" (asid)
				: "memory");
}

and

static inline void local_flush_tlb_range_asid(unsigned long start,
		unsigned long size, unsigned long asid)

{
	unsigned long end = ALIGN(start + size, PAGE_SIZE), tmp;

	for (tmp = start & PAGE_MASK; tmp < end; tmp += PAGE_SIZE) {
		__asm__ __volatile__ ("sfence.vma %0, %1"
					:
					: "r" (tmp), "r" (asid)
					: "memory");
	}
}

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  reply	other threads:[~2021-05-26  5:23 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-25 12:24 [PATCH V3 0/2] riscv: Fixup asid_allocator remaining issues guoren
2021-05-25 12:24 ` guoren
2021-05-25 12:24 ` [PATCH V3 1/2] riscv: Fixup _PAGE_GLOBAL in _PAGE_KERNEL guoren
2021-05-25 12:24   ` guoren
2021-05-25 12:28   ` Christoph Hellwig
2021-05-25 12:28     ` Christoph Hellwig
2021-05-25 12:24 ` [PATCH V3 2/2] riscv: Use use_asid_allocator flush TLB guoren
2021-05-25 12:24   ` guoren
2021-05-25 12:35   ` Christoph Hellwig
2021-05-25 12:35     ` Christoph Hellwig
2021-05-26  3:12     ` Guo Ren
2021-05-26  3:12       ` Guo Ren
2021-05-26  3:12       ` Guo Ren
2021-05-26  5:23       ` Christoph Hellwig [this message]
2021-05-26  5:23         ` Christoph Hellwig

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