From: Wei Liu <wl@xen.org>
To: Roger Pau Monne <roger.pau@citrix.com>
Cc: xen-devel@lists.xenproject.org, Wei Liu <wl@xen.org>,
Jan Beulich <jbeulich@suse.com>,
Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [Xen-devel] [PATCH v4 7/7] x86/tlb: use Xen L0 assisted TLB flush when available
Date: Tue, 11 Feb 2020 10:34:24 +0000 [thread overview]
Message-ID: <20200211103424.vtokisnsg4hq6pzw@debian> (raw)
In-Reply-To: <20200210172829.43604-8-roger.pau@citrix.com>
On Mon, Feb 10, 2020 at 06:28:29PM +0100, Roger Pau Monne wrote:
[...]
>
> struct hypervisor_ops {
> @@ -32,6 +34,8 @@ struct hypervisor_ops {
> void (*resume)(void);
> /* Fix up e820 map */
> void (*e820_fixup)(struct e820map *e820);
> + /* L0 assisted TLB flush */
> + int (*flush_tlb)(const cpumask_t *mask, const void *va, unsigned int order);
> };
>
> #ifdef CONFIG_GUEST
> @@ -41,6 +45,14 @@ void hypervisor_setup(void);
> int hypervisor_ap_setup(void);
> void hypervisor_resume(void);
> void hypervisor_e820_fixup(struct e820map *e820);
> +/*
> + * L0 assisted TLB flush.
> + * mask: cpumask of the dirty vCPUs that should be flushed.
> + * va: linear address to flush, or NULL for global flushes.
I was in the middle of writing my patch and noticed this.
I think NULL means "flushing the entire address space" here?
Wei.
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next prev parent reply other threads:[~2020-02-11 10:34 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-10 17:28 [Xen-devel] [PATCH v4 0/7] x86: improve assisted tlb flush and use it in guest mode Roger Pau Monne
2020-02-10 17:28 ` [Xen-devel] [PATCH v4 1/7] x86/hvm: allow ASID flush when v != current Roger Pau Monne
2020-02-10 17:28 ` [Xen-devel] [PATCH v4 2/7] x86/paging: add TLB flush hooks Roger Pau Monne
2020-02-13 9:02 ` Tim Deegan
2020-02-13 9:03 ` Tim Deegan
2020-02-10 17:28 ` [Xen-devel] [PATCH v4 3/7] x86/hap: improve hypervisor assisted guest TLB flush Roger Pau Monne
2020-02-10 17:28 ` [Xen-devel] [PATCH v4 4/7] x86/tlb: introduce a flush guests TLB flag Roger Pau Monne
2020-02-13 9:02 ` Tim Deegan
2020-02-10 17:28 ` [Xen-devel] [PATCH v4 5/7] x86/tlb: allow disabling the TLB clock Roger Pau Monne
2020-02-10 20:09 ` Wei Liu
2020-02-10 17:28 ` [Xen-devel] [PATCH v4 6/7] xen/guest: prepare hypervisor ops to use alternative calls Roger Pau Monne
2020-02-10 20:10 ` Wei Liu
2020-02-11 9:52 ` Durrant, Paul
2020-02-10 17:28 ` [Xen-devel] [PATCH v4 7/7] x86/tlb: use Xen L0 assisted TLB flush when available Roger Pau Monne
2020-02-10 20:16 ` Wei Liu
2020-02-11 10:34 ` Wei Liu [this message]
2020-02-11 14:06 ` Roger Pau Monné
2020-02-11 14:08 ` Wei Liu
2020-02-18 12:42 ` Roger Pau Monné
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