Commit 0b553086 authored by Yosry Ahmed's avatar Yosry Ahmed Committed by Wei Liu
Browse files

x86/hyperv: use helpers to read control registers in hv_snp_boot_ap() 



Use native_read_cr*() helpers to read control registers into vmsa->cr*
instead of open-coded assembly.

No functional change intended, unless there was a purpose to specifying
rax.

Signed-off-by: default avatarYosry Ahmed <yosryahmed@google.com>
Link: https://lore.kernel.org/r/20240805201247.427982-1-yosryahmed@google.com


Signed-off-by: default avatarWei Liu <wei.liu@kernel.org>
Message-ID: <20240805201247.427982-1-yosryahmed@google.com>
parent 87c9741a

arch/x86/hyperv/ivm.c

+3 −3
Original line number Diff line number Diff line
@@ -321,9 +321,9 @@ int hv_snp_boot_ap(u32 cpu, unsigned long start_ip) 


	vmsa->efer = native_read_msr(MSR_EFER);



	asm volatile("movq %%cr4, %%rax;" : "=a" (vmsa->cr4));

	asm volatile("movq %%cr3, %%rax;" : "=a" (vmsa->cr3));

	asm volatile("movq %%cr0, %%rax;" : "=a" (vmsa->cr0));

	vmsa->cr4 = native_read_cr4();

	vmsa->cr3 = __native_read_cr3();

	vmsa->cr0 = native_read_cr0();



	vmsa->xcr0 = 1;

	vmsa->g_pat = HV_AP_INIT_GPAT_DEFAULT;