On 30.01.2020 12:47, Wei Liu wrote:
> On Thu, Jan 30, 2020 at 12:39:47PM +0100, Roger Pau Monné wrote:
>> I think what you need is a hook that modifies the memory map and adds
>> a reserved region at ((1 << paddr_bits) - PAGE_SIZE) of size
>> PAGE_SIZE. See where pv_shim_fixup_e820 is used, and I t
On Thu, Jan 30, 2020 at 01:11:59PM +0100, Roger Pau Monné wrote:
> On Thu, Jan 30, 2020 at 11:47:52AM +, Wei Liu wrote:
> > On Thu, Jan 30, 2020 at 12:39:47PM +0100, Roger Pau Monné wrote:
> > > On Thu, Jan 30, 2020 at 11:18:21AM +, Wei Liu wrote:
> > > > On Thu, Jan 30, 2020 at 11:41:43AM
On Thu, Jan 30, 2020 at 11:47:52AM +, Wei Liu wrote:
> On Thu, Jan 30, 2020 at 12:39:47PM +0100, Roger Pau Monné wrote:
> > On Thu, Jan 30, 2020 at 11:18:21AM +, Wei Liu wrote:
> > > On Thu, Jan 30, 2020 at 11:41:43AM +0100, Roger Pau Monné wrote:
> > > > On Wed, Jan 29, 2020 at 08:20:29PM
On Thu, Jan 30, 2020 at 12:39:47PM +0100, Roger Pau Monné wrote:
> On Thu, Jan 30, 2020 at 11:18:21AM +, Wei Liu wrote:
> > On Thu, Jan 30, 2020 at 11:41:43AM +0100, Roger Pau Monné wrote:
> > > On Wed, Jan 29, 2020 at 08:20:29PM +, Wei Liu wrote:
> > > > Hyper-V uses a technique called ove
On Thu, Jan 30, 2020 at 11:18:21AM +, Wei Liu wrote:
> On Thu, Jan 30, 2020 at 11:41:43AM +0100, Roger Pau Monné wrote:
> > On Wed, Jan 29, 2020 at 08:20:29PM +, Wei Liu wrote:
> > > Hyper-V uses a technique called overlay page for its hypercall page. It
> > > will insert a backing page to
On Thu, Jan 30, 2020 at 09:57:17AM +, Durrant, Paul wrote:
> > -static const struct hypervisor_ops ops = {
> > -.name = "Hyper-V",
> > -};
> > +static uint64_t generate_guest_id(void)
> > +{
> > +uint64_t id;
> > +
> > +id = (uint64_t)HV_XEN_VENDOR_ID << 48;
> > +id |= (xen_majo
On Thu, Jan 30, 2020 at 11:41:43AM +0100, Roger Pau Monné wrote:
> On Wed, Jan 29, 2020 at 08:20:29PM +, Wei Liu wrote:
> > Hyper-V uses a technique called overlay page for its hypercall page. It
> > will insert a backing page to the guest when the hypercall functionality
> > is enabled. That m
On Wed, Jan 29, 2020 at 08:20:29PM +, Wei Liu wrote:
> Hyper-V uses a technique called overlay page for its hypercall page. It
> will insert a backing page to the guest when the hypercall functionality
> is enabled. That means we can use a page that is not backed by real
> memory for hypercall
> -Original Message-
> From: Wei Liu On Behalf Of Wei Liu
> Sent: 29 January 2020 20:20
> To: Xen Development List
> Cc: Durrant, Paul ; Michael Kelley
> ; Wei Liu ; Jan Beulich
> ; Andrew Cooper ; Wei Liu
> ; Roger Pau Monné
> Subject: [PATCH v5 07/12] x86/hyperv: setup hypercall page
>
Hyper-V uses a technique called overlay page for its hypercall page. It
will insert a backing page to the guest when the hypercall functionality
is enabled. That means we can use a page that is not backed by real
memory for hypercall page.
Use the top-most addressable page for that purpose. Adjust
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