From: Ed White <edmund.h.white@intel.com>
To: xen-devel@lists.xen.org
Cc: Ravi Sahita <ravi.sahita@intel.com>,
Wei Liu <wei.liu2@citrix.com>,
George Dunlap <george.dunlap@eu.citrix.com>,
Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>,
Ed White <edmund.h.white@intel.com>,
Jan Beulich <jbeulich@suse.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
tlengyel@novetta.com, Daniel De Graaf <dgdegra@tycho.nsa.gov>
Subject: [PATCH v4 04/15] x86/HVM: Hardware alternate p2m support detection.
Date: Thu, 9 Jul 2015 17:52:22 -0700 [thread overview]
Message-ID: <1436489553-6300-5-git-send-email-edmund.h.white@intel.com> (raw)
In-Reply-To: <1436489553-6300-1-git-send-email-edmund.h.white@intel.com>
As implemented here, only supported on platforms with VMX HAP.
By default this functionality is force-disabled, it can be enabled
by specifying altp2m=1 on the Xen command line.
Signed-off-by: Ed White <edmund.h.white@intel.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
docs/misc/xen-command-line.markdown | 7 +++++++
xen/arch/x86/hvm/hvm.c | 7 +++++++
xen/arch/x86/hvm/vmx/vmx.c | 1 +
xen/include/asm-x86/hvm/hvm.h | 9 +++++++++
4 files changed, 24 insertions(+)
diff --git a/docs/misc/xen-command-line.markdown b/docs/misc/xen-command-line.markdown
index aa684c0..3391c66 100644
--- a/docs/misc/xen-command-line.markdown
+++ b/docs/misc/xen-command-line.markdown
@@ -139,6 +139,13 @@ mode during S3 resume.
> Default: `true`
Permit Xen to use superpages when performing memory management.
+
+### altp2m (Intel)
+> `= <boolean>`
+
++> Default: `false`
+
+Permit multiple copies of host p2m.
### apic
> `= bigsmp | default`
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 535d622..4019658 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -94,6 +94,10 @@ bool_t opt_hvm_fep;
boolean_param("hvm_fep", opt_hvm_fep);
#endif
+/* Xen command-line option to enable altp2m */
+static bool_t __initdata opt_altp2m_enabled = 0;
+boolean_param("altp2m", opt_altp2m_enabled);
+
static int cpu_callback(
struct notifier_block *nfb, unsigned long action, void *hcpu)
{
@@ -160,6 +164,9 @@ static int __init hvm_enable(void)
if ( !fns->pvh_supported )
printk(XENLOG_INFO "HVM: PVH mode not supported on this platform\n");
+ if ( !opt_altp2m_enabled )
+ hvm_funcs.altp2m_supported = 0;
+
/*
* Allow direct access to the PC debug ports 0x80 and 0xed (they are
* often used for I/O delays, but the vmexits simply slow things down).
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index fc29b89..07527dd 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -1841,6 +1841,7 @@ const struct hvm_function_table * __init start_vmx(void)
if ( cpu_has_vmx_ept && (cpu_has_vmx_pat || opt_force_ept) )
{
vmx_function_table.hap_supported = 1;
+ vmx_function_table.altp2m_supported = 1;
vmx_function_table.hap_capabilities = 0;
diff --git a/xen/include/asm-x86/hvm/hvm.h b/xen/include/asm-x86/hvm/hvm.h
index 57f9605..c61cfe7 100644
--- a/xen/include/asm-x86/hvm/hvm.h
+++ b/xen/include/asm-x86/hvm/hvm.h
@@ -94,6 +94,9 @@ struct hvm_function_table {
/* Necessary hardware support for PVH mode? */
int pvh_supported;
+ /* Necessary hardware support for alternate p2m's? */
+ bool_t altp2m_supported;
+
/* Indicate HAP capabilities. */
int hap_capabilities;
@@ -509,6 +512,12 @@ bool_t nhvm_vmcx_hap_enabled(struct vcpu *v);
/* interrupt */
enum hvm_intblk nhvm_interrupt_blocked(struct vcpu *v);
+/* returns true if hardware supports alternate p2m's */
+static inline bool_t hvm_altp2m_supported(void)
+{
+ return hvm_funcs.altp2m_supported;
+}
+
#ifndef NDEBUG
/* Permit use of the Forced Emulation Prefix in HVM guests */
extern bool_t opt_hvm_fep;
--
1.9.1
next prev parent reply other threads:[~2015-07-10 0:52 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-10 0:52 [PATCH v4 00/15] Alternate p2m: support multiple copies of host p2m Ed White
2015-07-10 0:52 ` [PATCH v4 01/15] common/domain: Helpers to pause a domain while in context Ed White
2015-07-10 0:52 ` [PATCH v4 02/15] VMX: VMFUNC and #VE definitions and detection Ed White
2015-07-10 0:52 ` [PATCH v4 03/15] VMX: implement suppress #VE Ed White
2015-07-10 9:09 ` Jan Beulich
2015-07-10 19:22 ` Sahita, Ravi
2015-07-10 0:52 ` Ed White [this message]
2015-07-10 0:52 ` [PATCH v4 05/15] x86/altp2m: basic data structures and support routines Ed White
2015-07-10 9:13 ` Jan Beulich
2015-07-10 0:52 ` [PATCH v4 06/15] VMX/altp2m: add code to support EPTP switching and #VE Ed White
2015-07-10 16:48 ` George Dunlap
2015-07-10 0:52 ` [PATCH v4 07/15] VMX: add VMFUNC leaf 0 (EPTP switching) to emulator Ed White
2015-07-10 9:30 ` Jan Beulich
2015-07-11 20:01 ` Sahita, Ravi
2015-07-11 21:25 ` Sahita, Ravi
2015-07-13 7:18 ` Jan Beulich
2015-07-13 7:13 ` Jan Beulich
2015-07-10 0:52 ` [PATCH v4 08/15] x86/altp2m: add control of suppress_ve Ed White
2015-07-10 9:39 ` Jan Beulich
2015-07-10 11:11 ` George Dunlap
2015-07-10 11:49 ` Jan Beulich
2015-07-10 11:56 ` George Dunlap
2015-07-10 17:02 ` George Dunlap
2015-07-11 21:29 ` Sahita, Ravi
2015-07-10 0:52 ` [PATCH v4 09/15] x86/altp2m: alternate p2m memory events Ed White
2015-07-10 1:01 ` Lengyel, Tamas
2015-07-10 0:52 ` [PATCH v4 10/15] x86/altp2m: add remaining support routines Ed White
2015-07-10 9:41 ` Jan Beulich
2015-07-10 17:15 ` George Dunlap
2015-07-11 20:20 ` Sahita, Ravi
2015-07-10 0:52 ` [PATCH v4 11/15] x86/altp2m: define and implement alternate p2m HVMOP types Ed White
2015-07-10 10:01 ` Jan Beulich
2015-07-10 22:03 ` Sahita, Ravi
2015-07-13 7:25 ` Jan Beulich
2015-07-13 23:39 ` Sahita, Ravi
2015-07-14 8:58 ` Jan Beulich
2015-07-10 0:52 ` [PATCH v4 12/15] x86/altp2m: Add altp2mhvm HVM domain parameter Ed White
2015-07-10 8:53 ` Wei Liu
2015-07-10 17:32 ` George Dunlap
2015-07-10 22:12 ` Sahita, Ravi
2015-07-14 11:50 ` George Dunlap
2015-07-10 0:52 ` [PATCH v4 13/15] x86/altp2m: XSM hooks for altp2m HVM ops Ed White
2015-07-10 0:52 ` [PATCH v4 14/15] tools/libxc: add support to altp2m hvmops Ed White
2015-07-10 8:46 ` Ian Campbell
2015-07-10 0:52 ` [PATCH v4 15/15] tools/xen-access: altp2m testcases Ed White
2015-07-10 1:35 ` Lengyel, Tamas
2015-07-11 6:06 ` Razvan Cojocaru
2015-07-10 8:50 ` Ian Campbell
2015-07-10 8:55 ` Wei Liu
2015-07-10 9:12 ` Wei Liu
2015-07-10 9:20 ` Ian Campbell
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1436489553-6300-5-git-send-email-edmund.h.white@intel.com \
--to=edmund.h.white@intel.com \
--cc=andrew.cooper3@citrix.com \
--cc=dgdegra@tycho.nsa.gov \
--cc=george.dunlap@eu.citrix.com \
--cc=ian.jackson@eu.citrix.com \
--cc=jbeulich@suse.com \
--cc=ravi.sahita@intel.com \
--cc=tim@xen.org \
--cc=tlengyel@novetta.com \
--cc=wei.liu2@citrix.com \
--cc=xen-devel@lists.xen.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).