From: tip-bot for Maya Nakamura <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: tglx@linutronix.de, linux-kernel@vger.kernel.org,
vkuznets@redhat.com, mingo@kernel.org, hpa@zytor.com,
m.maya.nakamura@gmail.com, mikelley@microsoft.com
Subject: [tip:x86/hyperv] x86/hyperv: Create and use Hyper-V page definitions
Date: Mon, 22 Jul 2019 02:10:06 -0700 [thread overview]
Message-ID: <tip-fcd3f6222a4ece735d0b3ffb93f646eff693aa69@git.kernel.org> (raw)
In-Reply-To: <e95111629abf65d016e983f72494cbf110ce605f.1562916939.git.m.maya.nakamura@gmail.com>
Commit-ID: fcd3f6222a4ece735d0b3ffb93f646eff693aa69
Gitweb: https://git.kernel.org/tip/fcd3f6222a4ece735d0b3ffb93f646eff693aa69
Author: Maya Nakamura <m.maya.nakamura@gmail.com>
AuthorDate: Fri, 12 Jul 2019 08:14:47 +0000
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Mon, 22 Jul 2019 11:06:44 +0200
x86/hyperv: Create and use Hyper-V page definitions
Define HV_HYP_PAGE_SHIFT, HV_HYP_PAGE_SIZE, and HV_HYP_PAGE_MASK because
the Linux guest page size and hypervisor page size concepts are different,
even though they happen to be the same value on x86.
Also, replace PAGE_SIZE with HV_HYP_PAGE_SIZE.
Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lkml.kernel.org/r/e95111629abf65d016e983f72494cbf110ce605f.1562916939.git.m.maya.nakamura@gmail.com
---
arch/x86/include/asm/hyperv-tlfs.h | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index af78cd72b8f3..7a2705694f5b 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -12,6 +12,16 @@
#include <linux/types.h>
#include <asm/page.h>
+/*
+ * While not explicitly listed in the TLFS, Hyper-V always runs with a page size
+ * of 4096. These definitions are used when communicating with Hyper-V using
+ * guest physical pages and guest physical page addresses, since the guest page
+ * size may not be 4096 on all architectures.
+ */
+#define HV_HYP_PAGE_SHIFT 12
+#define HV_HYP_PAGE_SIZE BIT(HV_HYP_PAGE_SHIFT)
+#define HV_HYP_PAGE_MASK (~(HV_HYP_PAGE_SIZE - 1))
+
/*
* The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
* is set by CPUID(HvCpuIdFunctionVersionAndFeatures).
@@ -847,7 +857,7 @@ union hv_gpa_page_range {
* count is equal with how many entries of union hv_gpa_page_range can
* be populated into the input parameter page.
*/
-#define HV_MAX_FLUSH_REP_COUNT ((PAGE_SIZE - 2 * sizeof(u64)) / \
+#define HV_MAX_FLUSH_REP_COUNT ((HV_HYP_PAGE_SIZE - 2 * sizeof(u64)) / \
sizeof(union hv_gpa_page_range))
struct hv_guest_mapping_flush_list {
next prev parent reply other threads:[~2019-07-22 9:10 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-12 8:11 [PATCH v4 0/5] hv: Remove dependencies on guest page size Maya Nakamura
2019-07-12 8:14 ` [PATCH v4 1/5] x86: hv: hyperv-tlfs.h: Create and use Hyper-V page definitions Maya Nakamura
2019-07-22 9:10 ` tip-bot for Maya Nakamura [this message]
2019-07-12 8:21 ` [PATCH v4 2/5] x86: hv: Add functions to allocate/deallocate page for Hyper-V Maya Nakamura
2019-07-22 9:10 ` [tip:x86/hyperv] x86/hyperv: " tip-bot for Maya Nakamura
2019-07-12 8:25 ` [PATCH v4 3/5] hv: vmbus: Replace page definition with Hyper-V specific one Maya Nakamura
2019-07-18 2:22 ` Sasha Levin
2019-07-22 9:08 ` Thomas Gleixner
2019-07-22 9:11 ` [tip:x86/hyperv] drivers: " tip-bot for Maya Nakamura
2019-07-12 8:27 ` [PATCH v4 4/5] HID: hv: Remove dependencies on PAGE_SIZE for ring buffer Maya Nakamura
[not found] ` <DM5PR21MB013708BF1876B7282C049B76D7BC0@DM5PR21MB0137.namprd21.prod.outlook.com>
2019-09-02 11:30 ` Jiri Kosina
2019-09-03 0:26 ` Sasha Levin
2019-07-12 8:30 ` [PATCH v4 5/5] Input: " Maya Nakamura
2019-07-14 23:28 ` Dmitry Torokhov
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