Dexuan Cui b9b4fe3a72 x86/hyperv: Use TDX GHCI to access some MSRs in a TDX VM with the paravisor ... When the paravisor is present, a SNP VM must use GHCB to access some special MSRs, including HV_X64_MSR_GUEST_OS_ID and some SynIC MSRs. Similarly, when the paravisor is present, a TDX VM must use TDX GHCI to access the same MSRs. Implement hv_tdx_msr_write() and hv_tdx_msr_read(), and use the helper functions hv_ivm_msr_read() and hv_ivm_msr_write() to access the MSRs in a unified way for SNP/TDX VMs with the paravisor. Do not export hv_tdx_msr_write() and hv_tdx_msr_read(), because we never really used hv_ghcb_msr_write() and hv_ghcb_msr_read() in any module. Update arch/x86/include/asm/mshyperv.h so that the kernel can still build if CONFIG_AMD_MEM_ENCRYPT or CONFIG_INTEL_TDX_GUEST is not set, or neither is set. Signed-off-by: Dexuan Cui <decui@microsoft.com> Reviewed-by: Tianyu Lan <tiala@microsoft.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Wei Liu <wei.liu@kernel.org> Link: https://lore.kernel.org/r/20230824080712.30327-9-decui@microsoft.com		2023-08-25 00:04:57 +00:00
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hv_apic.c	Drivers: hv: vmbus: Support fully enlightened TDX guests	2023-08-25 00:04:56 +00:00
hv_init.c	x86/hyperv: Use TDX GHCI to access some MSRs in a TDX VM with the paravisor	2023-08-25 00:04:57 +00:00
hv_proc.c	drivers: hv: Create a consistent pattern for checking Hyper-V hypercall status	2021-04-21 09:49:19 +00:00
hv_spinlock.c	x86/hyperv: Fix unused variable 'msr_val' warning in hv_qlock_wait	2021-03-24 11:31:04 +00:00
hv_vtl.c	x86/hyperv/vtl: Add noop for realmode pointers	2023-05-08 16:46:43 +00:00
irqdomain.c	genirq: Return a const cpumask from irq_data_get_affinity_mask	2022-07-07 09:38:04 +01:00
ivm.c	x86/hyperv: Use TDX GHCI to access some MSRs in a TDX VM with the paravisor	2023-08-25 00:04:57 +00:00
Makefile	x86/hyperv: VTL support for Hyper-V	2023-04-18 17:29:52 +00:00
mmu.c	x86/hyperv: Exclude lazy TLB mode CPUs from enlightened TLB flushes	2023-04-17 19:19:05 +00:00
nested.c	drivers: hv: Create a consistent pattern for checking Hyper-V hypercall status	2021-04-21 09:49:19 +00:00