From: Sheng Yang <sheng@linux.intel.com>
To: Keir Fraser <keir.fraser@eu.citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: [PATCH] VT-d: Hardware require RH bit to be set in IRTE when delivery mode is LPR
Date: Thu, 26 Aug 2010 17:17:40 +0800 [thread overview]
Message-ID: <201008261717.40223.sheng@linux.intel.com> (raw)
[-- Attachment #1: Type: Text/Plain, Size: 1406 bytes --]
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
--
diff --git a/xen/drivers/passthrough/vtd/intremap.c
b/xen/drivers/passthrough/vtd/intremap.c
--- a/xen/drivers/passthrough/vtd/intremap.c
+++ b/xen/drivers/passthrough/vtd/intremap.c
@@ -320,9 +320,13 @@
*(((u32 *)&new_rte) + 0) = value;
new_ire.lo.fpd = 0;
new_ire.lo.dm = new_rte.dest_mode;
- new_ire.lo.rh = 0;
new_ire.lo.tm = new_rte.trigger;
new_ire.lo.dlm = new_rte.delivery_mode;
+ /* Hardware require RH = 1 for LPR delivery mode */
+ if ( new_ire.lo.dlm == dest_LowestPrio )
+ new_ire.lo.rh = 1;
+ else
+ new_ire.lo.rh = 0;
new_ire.lo.avail = 0;
new_ire.lo.res_1 = 0;
new_ire.lo.vector = new_rte.vector;
@@ -632,9 +636,13 @@
/* Set interrupt remapping table entry */
new_ire.lo.fpd = 0;
new_ire.lo.dm = (msg->address_lo >> MSI_ADDR_DESTMODE_SHIFT) & 0x1;
- new_ire.lo.rh = 0;
new_ire.lo.tm = (msg->data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
new_ire.lo.dlm = (msg->data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x1;
+ /* Hardware require RH = 1 for LPR delivery mode */
+ if ( new_ire.lo.dlm == dest_LowestPrio )
+ new_ire.lo.rh = 1;
+ else
+ new_ire.lo.rh = 0;
new_ire.lo.avail = 0;
new_ire.lo.res_1 = 0;
new_ire.lo.vector = (msg->data >> MSI_DATA_VECTOR_SHIFT) &
[-- Attachment #2: rh_fix.patch --]
[-- Type: text/x-patch, Size: 1351 bytes --]
diff --git a/xen/drivers/passthrough/vtd/intremap.c b/xen/drivers/passthrough/vtd/intremap.c
--- a/xen/drivers/passthrough/vtd/intremap.c
+++ b/xen/drivers/passthrough/vtd/intremap.c
@@ -320,9 +320,13 @@
*(((u32 *)&new_rte) + 0) = value;
new_ire.lo.fpd = 0;
new_ire.lo.dm = new_rte.dest_mode;
- new_ire.lo.rh = 0;
new_ire.lo.tm = new_rte.trigger;
new_ire.lo.dlm = new_rte.delivery_mode;
+ /* Hardware require RH = 1 for LPR delivery mode */
+ if ( new_ire.lo.dlm == dest_LowestPrio )
+ new_ire.lo.rh = 1;
+ else
+ new_ire.lo.rh = 0;
new_ire.lo.avail = 0;
new_ire.lo.res_1 = 0;
new_ire.lo.vector = new_rte.vector;
@@ -632,9 +636,13 @@
/* Set interrupt remapping table entry */
new_ire.lo.fpd = 0;
new_ire.lo.dm = (msg->address_lo >> MSI_ADDR_DESTMODE_SHIFT) & 0x1;
- new_ire.lo.rh = 0;
new_ire.lo.tm = (msg->data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
new_ire.lo.dlm = (msg->data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x1;
+ /* Hardware require RH = 1 for LPR delivery mode */
+ if ( new_ire.lo.dlm == dest_LowestPrio )
+ new_ire.lo.rh = 1;
+ else
+ new_ire.lo.rh = 0;
new_ire.lo.avail = 0;
new_ire.lo.res_1 = 0;
new_ire.lo.vector = (msg->data >> MSI_DATA_VECTOR_SHIFT) &
[-- Attachment #3: Type: text/plain, Size: 138 bytes --]
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next reply other threads:[~2010-08-26 9:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-26 9:17 Sheng Yang [this message]
2010-08-26 9:24 ` [PATCH] VT-d: Hardware require RH bit to be set in IRTE when delivery mode is LPR Keir Fraser
2010-08-26 9:42 ` Sheng Yang
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