From: "Sahita, Ravi" <ravi.sahita@intel.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Tim Deegan <tim@xen.org>, "Sahita, Ravi" <ravi.sahita@intel.com>,
Wei Liu <wei.liu2@citrix.com>,
George Dunlap <george.dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <ian.jackson@eu.citrix.com>,
"White, Edmund H" <edmund.h.white@intel.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>,
"Nakajima, Jun" <jun.nakajima@intel.com>,
"tlengyel@novetta.com" <tlengyel@novetta.com>,
Daniel De Graaf <dgdegra@tycho.nsa.gov>
Subject: Re: [PATCH v7 06/15] VMX/altp2m: add code to support EPTP switching and #VE.
Date: Thu, 23 Jul 2015 14:40:37 +0000 [thread overview]
Message-ID: <DBC12B0F5509554280826E40BCDEE8BE54FE8350@ORSMSX104.amr.corp.intel.com> (raw)
In-Reply-To: <55B0D35902000078000946F4@prv-mh.provo.novell.com>
>From: Jan Beulich [mailto:JBeulich@suse.com]
>Sent: Thursday, July 23, 2015 2:43 AM
>
>>>> On 23.07.15 at 01:01, <edmund.h.white@intel.com> wrote:
>> @@ -1770,6 +1771,105 @@ static bool_t
>vmx_is_singlestep_supported(void)
>> return cpu_has_monitor_trap_flag; }
>>
>> +static void vmx_vcpu_update_eptp(struct vcpu *v) {
>> + struct domain *d = v->domain;
>> + struct p2m_domain *p2m = NULL;
>> + struct ept_data *ept;
>> +
>> + if ( altp2m_active(d) )
>> + p2m = p2m_get_altp2m(v);
>> + if ( !p2m )
>> + p2m = p2m_get_hostp2m(d);
>> +
>> + ept = &p2m->ept;
>> + ept->asr = pagetable_get_pfn(p2m_get_pagetable(p2m));
>> +
>> + vmx_vmcs_enter(v);
>> +
>> + __vmwrite(EPT_POINTER, ept_get_eptp(ept));
>> +
>> + if ( v->arch.hvm_vmx.secondary_exec_control &
>> + SECONDARY_EXEC_ENABLE_VIRT_EXCEPTIONS )
>
>Indentation.
>
Ok.
>> +static void vmx_vcpu_update_vmfunc_ve(struct vcpu *v) {
>> + struct domain *d = v->domain;
>> + u32 mask = SECONDARY_EXEC_ENABLE_VM_FUNCTIONS;
>> +
>> + if ( !cpu_has_vmx_vmfunc )
>> + return;
>> +
>> + if ( cpu_has_vmx_virt_exceptions )
>> + mask |= SECONDARY_EXEC_ENABLE_VIRT_EXCEPTIONS;
>> +
>> + vmx_vmcs_enter(v);
>> +
>> + if ( !d->is_dying && altp2m_active(d) )
>> + {
>> + v->arch.hvm_vmx.secondary_exec_control |= mask;
>> + __vmwrite(VM_FUNCTION_CONTROL,
>VMX_VMFUNC_EPTP_SWITCHING);
>> + __vmwrite(EPTP_LIST_ADDR,
>> + virt_to_maddr(d->arch.altp2m_eptp));
>> +
>> + if ( cpu_has_vmx_virt_exceptions )
>> + {
>> + p2m_type_t t;
>> + mfn_t mfn;
>> +
>> + mfn = get_gfn_query_unlocked(d,
>> + gfn_x(vcpu_altp2m(v).veinfo_gfn), &t);
>> +
>> + if ( mfn_x(mfn) != INVALID_MFN )
>> + __vmwrite(VIRT_EXCEPTION_INFO, mfn_x(mfn) <<
>> + PAGE_SHIFT);
>
>Considering that the VMCS field holds a byte-aligned address, why do you
>have the (later introduced) hvmop specify a GFN instead of a GPA?
>
The SDM states:
" If the "EPT-violation #VE" VM-execution control is 1, the virtualization-exception information address must
satisfy the following checks:
- Bits 11:0 of the address must be 0.
- The address must not set any bits beyond the processor's physical-address width."
>Also you shouldn't be open coding pfn_to_paddr().
>
ok
thanks,
Ravi
>> + else
>> + v->arch.hvm_vmx.secondary_exec_control &=
>> + ~SECONDARY_EXEC_ENABLE_VIRT_EXCEPTIONS;
>> + }
>> + }
>> + else
>> + v->arch.hvm_vmx.secondary_exec_control &= ~mask;
>> +
>> + __vmwrite(SECONDARY_VM_EXEC_CONTROL,
>> + v->arch.hvm_vmx.secondary_exec_control);
>
>Indentation again.
>
>Jan
next prev parent reply other threads:[~2015-07-23 14:40 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-22 23:01 [PATCH v7 00/15] Alternate p2m: support multiple copies of host p2m Ed White
2015-07-22 23:01 ` [PATCH v7 01/15] common/domain: Helpers to pause a domain while in context Ed White
2015-07-22 23:01 ` [PATCH v7 02/15] VMX: VMFUNC and #VE definitions and detection Ed White
2015-07-22 23:01 ` [PATCH v7 03/15] VMX: implement suppress #VE Ed White
2015-07-22 23:01 ` [PATCH v7 04/15] x86/HVM: Hardware alternate p2m support detection Ed White
2015-07-22 23:01 ` [PATCH v7 05/15] x86/altp2m: basic data structures and support routines Ed White
2015-07-23 9:22 ` Jan Beulich
2015-07-23 14:36 ` Sahita, Ravi
2015-07-23 14:53 ` Jan Beulich
2015-07-23 15:00 ` Sahita, Ravi
2015-07-22 23:01 ` [PATCH v7 06/15] VMX/altp2m: add code to support EPTP switching and #VE Ed White
2015-07-23 9:43 ` Jan Beulich
2015-07-23 14:40 ` Sahita, Ravi [this message]
2015-07-23 15:00 ` Jan Beulich
2015-07-23 15:02 ` Sahita, Ravi
2015-07-22 23:01 ` [PATCH v7 07/15] VMX: add VMFUNC leaf 0 (EPTP switching) to emulator Ed White
2015-07-22 23:01 ` [PATCH v7 08/15] x86/altp2m: add control of suppress_ve Ed White
2015-07-22 23:01 ` [PATCH v7 09/15] x86/altp2m: alternate p2m memory events Ed White
2015-07-22 23:01 ` [PATCH v7 10/15] x86/altp2m: add remaining support routines Ed White
2015-07-23 10:05 ` Jan Beulich
2015-07-23 14:51 ` Sahita, Ravi
2015-07-23 15:02 ` Jan Beulich
2015-07-23 16:08 ` George Dunlap
2015-07-23 16:15 ` Jan Beulich
2015-07-23 16:50 ` Sahita, Ravi
2015-07-23 19:10 ` George Dunlap
2015-07-22 23:01 ` [PATCH v7 11/15] x86/altp2m: define and implement alternate p2m HVMOP types Ed White
2015-07-23 10:22 ` Jan Beulich
2015-07-23 14:56 ` Sahita, Ravi
2015-07-23 15:08 ` Jan Beulich
2015-07-23 15:16 ` Sahita, Ravi
2015-07-22 23:01 ` [PATCH v7 12/15] x86/altp2m: Add altp2mhvm HVM domain parameter Ed White
2015-07-22 23:01 ` [PATCH v7 13/15] x86/altp2m: XSM hooks for altp2m HVM ops Ed White
2015-07-23 16:08 ` Jan Beulich
2015-07-23 16:56 ` Sahita, Ravi
2015-07-24 7:49 ` Jan Beulich
2015-07-22 23:01 ` [PATCH v7 14/15] tools/libxc: add support to altp2m hvmops Ed White
2015-07-22 23:01 ` [PATCH v7 15/15] tools/xen-access: altp2m testcases Ed White
2015-07-23 17:12 ` [PATCH v7 00/15] Alternate p2m: support multiple copies of host p2m Wei Liu
2015-07-23 19:11 ` George Dunlap
2015-07-24 9:56 ` Wei Liu
2015-07-24 16:06 ` Sahita, Ravi
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