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Commit 73638cdd authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Drivers: hv: vmbus: Move the check for hypercall page setup 



As part of the effort to separate out architecture specific code, move the
check for detecting if the hypercall page is setup.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d058fa7e

arch/x86/hyperv/hv_init.c

+15 −0
Original line number Diff line number Diff line
@@ -235,3 +235,18 @@ void hyperv_report_panic(struct pt_regs *regs) 
	wrmsrl(HV_X64_MSR_CRASH_CTL, HV_CRASH_CTL_CRASH_NOTIFY);

}

EXPORT_SYMBOL_GPL(hyperv_report_panic);



bool hv_is_hypercall_page_setup(void)

{

	union hv_x64_msr_hypercall_contents hypercall_msr;



	/* Check if the hypercall page is setup */

	hypercall_msr.as_uint64 = 0;

	rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);



	if (!hypercall_msr.enable)

		return false;



	return true;

}

EXPORT_SYMBOL_GPL(hv_is_hypercall_page_setup);

arch/x86/include/asm/mshyperv.h

+1 −0
Original line number Diff line number Diff line
@@ -115,5 +115,6 @@ void hv_remove_crash_handler(void); 
#if IS_ENABLED(CONFIG_HYPERV)

void hyperv_init(void);

void hyperv_report_panic(struct pt_regs *regs);

bool hv_is_hypercall_page_setup(void);

#endif

#endif

drivers/hv/hv.c

+1 −6
Original line number Diff line number Diff line
@@ -49,7 +49,6 @@ struct hv_context hv_context = { 
 */

int hv_init(void)

{

	union hv_x64_msr_hypercall_contents hypercall_msr;



	memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS);

	memset(hv_context.synic_message_page, 0,
@@ -65,11 +64,7 @@ int hv_init(void) 
	memset(hv_context.clk_evt, 0,

	       sizeof(void *) * NR_CPUS);



	/* See if the hypercall page is already set */

	hypercall_msr.as_uint64 = 0;

	rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);



	if (!hypercall_msr.enable)

	if (!hv_is_hypercall_page_setup())

		return -ENOTSUPP;



	return 0;