x86/hyperv: Create and use Hyper-V page definitions (fcd3f622) · Commits · 戴 / test

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

+11 −1

Original line number	Diff line number	Diff line
		@@ -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 {

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