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Message-ID: <BYAPR21MB16889A9D76888A485D7BB19FD7BA9@BYAPR21MB1688.namprd21.prod.outlook.com>
Date: Fri, 10 Mar 2023 19:30:02 +0000
From: "Michael Kelley (LINUX)" <mikelley@...rosoft.com>
To: Nuno Das Neves <nunodasneves@...ux.microsoft.com>,
"linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: "virtualization@...ts.linux-foundation.org"
<virtualization@...ts.linux-foundation.org>,
KY Srinivasan <kys@...rosoft.com>,
"wei.liu@...nel.org" <wei.liu@...nel.org>,
"vkuznets@...hat.com" <vkuznets@...hat.com>
Subject: RE: [RFC PATCH] hyperv-tlfs: Change shared HV_REGISTER_* defines to
HV_SYNTHETIC_REG_*
From: Nuno Das Neves <nunodasneves@...ux.microsoft.com> Sent: Tuesday, March 7, 2023 1:13 PM
>
> In x86 hyperv-tlfs, HV_REGISTER_ prefix is used to indicate MSRs
> accessed via rdmsrl/wrmsrl. But in ARM64, HV_REGISTER_ instead indicates
> VP registers accessed via get/set vp registers hypercall.
>
> This is due to HV_REGISTER_* names being used by hv_set/get_register,
> with the arch-specific version delegating to the appropriate mechanism.
>
> The problem is, using prefix HV_REGISTER_ for MSRs will conflict with
> VP registers when they are introduced for x86 in future.
>
> This patch solves the issue by:
>
> 1. Defining all the x86 MSRs with a consistent prefix: HV_X64_MSR_.
> This is so HV_REGISTER_ can be reserved for VP registers.
>
> 2. Change the non-arch-specific alias used by hv_set/get_register to
> HV_SYNTHETIC_REG.
I definitely messed this up when I first did the ARM64 support a
few years back. :-( This is a necessary fix.
What about keeping HV_REGISTER_ as the prefix for the architecture
independent alias, and creating a new prefix for the Hyper-V register
definition? This would allow the existing hv_get/set_register()
invocations to remain unchanged, and eliminates the code churn
in the arch independent code.
The HV_X64_MSR_ prefix is definitely good for the MSR addresses,
especially since a lot of definitions that are x86/x64 only are still in use.
Then perhaps use HV_HYP_REG_ or something similar for the Hyper-V
register definition.
If you don't like that suggestion, I wonder if the HV_SYNTHETIC_REG_
prefix could be shortened to help avoid line length problems. Maybe
HV_SYNREG_ or HV_SYN_REG_ ?
>
> Signed-off-by: Nuno Das Neves <nudasnev@...rosoft.com>
> ---
> arch/arm64/include/asm/hyperv-tlfs.h | 25 +++++
> arch/x86/include/asm/hyperv-tlfs.h | 137 +++++++++++++--------------
> arch/x86/include/asm/mshyperv.h | 8 +-
> arch/x86/kernel/cpu/mshyperv.c | 22 ++---
> drivers/clocksource/hyperv_timer.c | 24 ++---
> drivers/hv/hv.c | 32 +++----
> drivers/hv/hv_common.c | 4 +-
> drivers/hv/vmbus_drv.c | 14 +--
> include/asm-generic/mshyperv.h | 2 +-
> 9 files changed, 146 insertions(+), 122 deletions(-)
>
> diff --git a/arch/arm64/include/asm/hyperv-tlfs.h b/arch/arm64/include/asm/hyperv-
> tlfs.h
> index bc6c7ac934a1..474025eb3d7e 100644
> --- a/arch/arm64/include/asm/hyperv-tlfs.h
> +++ b/arch/arm64/include/asm/hyperv-tlfs.h
> @@ -64,6 +64,31 @@
> #define HV_REGISTER_STIMER0_CONFIG 0x000B0000
> #define HV_REGISTER_STIMER0_COUNT 0x000B0001
>
> +/*
> + * To support non-arch-specific code calling hv_set/get_register:
> + * - On x86, HV_SYNTHETIC_REG_ indicates an MSR accessed via rdmsrl/wrmsrl
> + * - On ARM, HV_SYNTHETIC_REG_ indicates a VP register accessed via hypercall
Nit: Let's use the full "ARM64" instead of just "ARM" here so that there's no
confusion about whether 32-bit ARM is supported.
> + */
> +#define HV_SYNTHETIC_REG_VP_INDEX (HV_REGISTER_VP_INDEX)
> +#define HV_SYNTHETIC_REG_TIME_REF_COUNT
> (HV_REGISTER_TIME_REF_COUNT)
> +#define HV_SYNTHETIC_REG_REFERENCE_TSC
> (HV_REGISTER_REFERENCE_TSC)
> +
> +#define HV_SYNTHETIC_REG_STIMER0_CONFIG
> (HV_REGISTER_STIMER0_CONFIG)
> +#define HV_SYNTHETIC_REG_STIMER0_COUNT
> (HV_REGISTER_STIMER0_COUNT)
> +
> +#define HV_SYNTHETIC_REG_SCONTROL (HV_REGISTER_SCONTROL)
> +#define HV_SYNTHETIC_REG_SIEFP (HV_REGISTER_SIEFP)
> +#define HV_SYNTHETIC_REG_SIMP (HV_REGISTER_SIMP)
> +#define HV_SYNTHETIC_REG_EOM (HV_REGISTER_EOM)
> +#define HV_SYNTHETIC_REG_SINT0 (HV_REGISTER_SINT0)
> +
> +#define HV_SYNTHETIC_REG_CRASH_P0 (HV_REGISTER_CRASH_P0)
> +#define HV_SYNTHETIC_REG_CRASH_P1 (HV_REGISTER_CRASH_P1)
> +#define HV_SYNTHETIC_REG_CRASH_P2 (HV_REGISTER_CRASH_P2)
> +#define HV_SYNTHETIC_REG_CRASH_P3 (HV_REGISTER_CRASH_P3)
> +#define HV_SYNTHETIC_REG_CRASH_P4 (HV_REGISTER_CRASH_P4)
> +#define HV_SYNTHETIC_REG_CRASH_CTL (HV_REGISTER_CRASH_CTL)
> +
> union hv_msi_entry {
> u64 as_uint64[2];
> struct {
> diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
> index 566ac26239ba..0dbb0218d0fa 100644
> --- a/arch/x86/include/asm/hyperv-tlfs.h
> +++ b/arch/x86/include/asm/hyperv-tlfs.h
> @@ -178,7 +178,7 @@ enum hv_isolation_type {
> #define HV_X64_MSR_HYPERCALL 0x40000001
>
> /* MSR used to provide vcpu index */
> -#define HV_REGISTER_VP_INDEX 0x40000002
> +#define HV_X64_MSR_VP_INDEX 0x40000002
>
> /* MSR used to reset the guest OS. */
> #define HV_X64_MSR_RESET 0x40000003
> @@ -187,10 +187,10 @@ enum hv_isolation_type {
> #define HV_X64_MSR_VP_RUNTIME 0x40000010
>
> /* MSR used to read the per-partition time reference counter */
> -#define HV_REGISTER_TIME_REF_COUNT 0x40000020
> +#define HV_X64_MSR_TIME_REF_COUNT 0x40000020
>
> /* A partition's reference time stamp counter (TSC) page */
> -#define HV_REGISTER_REFERENCE_TSC 0x40000021
> +#define HV_X64_MSR_REFERENCE_TSC 0x40000021
>
> /* MSR used to retrieve the TSC frequency */
> #define HV_X64_MSR_TSC_FREQUENCY 0x40000022
> @@ -205,61 +205,61 @@ enum hv_isolation_type {
> #define HV_X64_MSR_VP_ASSIST_PAGE 0x40000073
>
> /* Define synthetic interrupt controller model specific registers. */
> -#define HV_REGISTER_SCONTROL 0x40000080
> -#define HV_REGISTER_SVERSION 0x40000081
> -#define HV_REGISTER_SIEFP 0x40000082
> -#define HV_REGISTER_SIMP 0x40000083
> -#define HV_REGISTER_EOM 0x40000084
> -#define HV_REGISTER_SINT0 0x40000090
> -#define HV_REGISTER_SINT1 0x40000091
> -#define HV_REGISTER_SINT2 0x40000092
> -#define HV_REGISTER_SINT3 0x40000093
> -#define HV_REGISTER_SINT4 0x40000094
> -#define HV_REGISTER_SINT5 0x40000095
> -#define HV_REGISTER_SINT6 0x40000096
> -#define HV_REGISTER_SINT7 0x40000097
> -#define HV_REGISTER_SINT8 0x40000098
> -#define HV_REGISTER_SINT9 0x40000099
> -#define HV_REGISTER_SINT10 0x4000009A
> -#define HV_REGISTER_SINT11 0x4000009B
> -#define HV_REGISTER_SINT12 0x4000009C
> -#define HV_REGISTER_SINT13 0x4000009D
> -#define HV_REGISTER_SINT14 0x4000009E
> -#define HV_REGISTER_SINT15 0x4000009F
> +#define HV_X64_MSR_SCONTROL 0x40000080
> +#define HV_X64_MSR_SVERSION 0x40000081
> +#define HV_X64_MSR_SIEFP 0x40000082
> +#define HV_X64_MSR_SIMP 0x40000083
> +#define HV_X64_MSR_EOM 0x40000084
> +#define HV_X64_MSR_SINT0 0x40000090
> +#define HV_X64_MSR_SINT1 0x40000091
> +#define HV_X64_MSR_SINT2 0x40000092
> +#define HV_X64_MSR_SINT3 0x40000093
> +#define HV_X64_MSR_SINT4 0x40000094
> +#define HV_X64_MSR_SINT5 0x40000095
> +#define HV_X64_MSR_SINT6 0x40000096
> +#define HV_X64_MSR_SINT7 0x40000097
> +#define HV_X64_MSR_SINT8 0x40000098
> +#define HV_X64_MSR_SINT9 0x40000099
> +#define HV_X64_MSR_SINT10 0x4000009A
> +#define HV_X64_MSR_SINT11 0x4000009B
> +#define HV_X64_MSR_SINT12 0x4000009C
> +#define HV_X64_MSR_SINT13 0x4000009D
> +#define HV_X64_MSR_SINT14 0x4000009E
> +#define HV_X64_MSR_SINT15 0x4000009F
>
> /*
> * Define synthetic interrupt controller model specific registers for
> * nested hypervisor.
> */
> -#define HV_REGISTER_NESTED_SCONTROL 0x40001080
> -#define HV_REGISTER_NESTED_SVERSION 0x40001081
> -#define HV_REGISTER_NESTED_SIEFP 0x40001082
> -#define HV_REGISTER_NESTED_SIMP 0x40001083
> -#define HV_REGISTER_NESTED_EOM 0x40001084
> -#define HV_REGISTER_NESTED_SINT0 0x40001090
> +#define HV_X64_MSR_NESTED_SCONTROL 0x40001080
> +#define HV_X64_MSR_NESTED_SVERSION 0x40001081
> +#define HV_X64_MSR_NESTED_SIEFP 0x40001082
> +#define HV_X64_MSR_NESTED_SIMP 0x40001083
> +#define HV_X64_MSR_NESTED_EOM 0x40001084
> +#define HV_X64_MSR_NESTED_SINT0 0x40001090
>
> /*
> * Synthetic Timer MSRs. Four timers per vcpu.
> */
> -#define HV_REGISTER_STIMER0_CONFIG 0x400000B0
> -#define HV_REGISTER_STIMER0_COUNT 0x400000B1
> -#define HV_REGISTER_STIMER1_CONFIG 0x400000B2
> -#define HV_REGISTER_STIMER1_COUNT 0x400000B3
> -#define HV_REGISTER_STIMER2_CONFIG 0x400000B4
> -#define HV_REGISTER_STIMER2_COUNT 0x400000B5
> -#define HV_REGISTER_STIMER3_CONFIG 0x400000B6
> -#define HV_REGISTER_STIMER3_COUNT 0x400000B7
> +#define HV_X64_MSR_STIMER0_CONFIG 0x400000B0
> +#define HV_X64_MSR_STIMER0_COUNT 0x400000B1
> +#define HV_X64_MSR_STIMER1_CONFIG 0x400000B2
> +#define HV_X64_MSR_STIMER1_COUNT 0x400000B3
> +#define HV_X64_MSR_STIMER2_CONFIG 0x400000B4
> +#define HV_X64_MSR_STIMER2_COUNT 0x400000B5
> +#define HV_X64_MSR_STIMER3_CONFIG 0x400000B6
> +#define HV_X64_MSR_STIMER3_COUNT 0x400000B7
>
> /* Hyper-V guest idle MSR */
> #define HV_X64_MSR_GUEST_IDLE 0x400000F0
>
> /* Hyper-V guest crash notification MSR's */
> -#define HV_REGISTER_CRASH_P0 0x40000100
> -#define HV_REGISTER_CRASH_P1 0x40000101
> -#define HV_REGISTER_CRASH_P2 0x40000102
> -#define HV_REGISTER_CRASH_P3 0x40000103
> -#define HV_REGISTER_CRASH_P4 0x40000104
> -#define HV_REGISTER_CRASH_CTL 0x40000105
> +#define HV_X64_MSR_CRASH_P0 0x40000100
> +#define HV_X64_MSR_CRASH_P1 0x40000101
> +#define HV_X64_MSR_CRASH_P2 0x40000102
> +#define HV_X64_MSR_CRASH_P3 0x40000103
> +#define HV_X64_MSR_CRASH_P4 0x40000104
> +#define HV_X64_MSR_CRASH_CTL 0x40000105
>
> /* TSC emulation after migration */
> #define HV_X64_MSR_REENLIGHTENMENT_CONTROL 0x40000106
> @@ -269,31 +269,30 @@ enum hv_isolation_type {
> /* TSC invariant control */
> #define HV_X64_MSR_TSC_INVARIANT_CONTROL 0x40000118
>
> -/* Register name aliases for temporary compatibility */
> -#define HV_X64_MSR_STIMER0_COUNT HV_REGISTER_STIMER0_COUNT
> -#define HV_X64_MSR_STIMER0_CONFIG HV_REGISTER_STIMER0_CONFIG
> -#define HV_X64_MSR_STIMER1_COUNT HV_REGISTER_STIMER1_COUNT
> -#define HV_X64_MSR_STIMER1_CONFIG HV_REGISTER_STIMER1_CONFIG
> -#define HV_X64_MSR_STIMER2_COUNT HV_REGISTER_STIMER2_COUNT
> -#define HV_X64_MSR_STIMER2_CONFIG HV_REGISTER_STIMER2_CONFIG
> -#define HV_X64_MSR_STIMER3_COUNT HV_REGISTER_STIMER3_COUNT
> -#define HV_X64_MSR_STIMER3_CONFIG HV_REGISTER_STIMER3_CONFIG
> -#define HV_X64_MSR_SCONTROL HV_REGISTER_SCONTROL
> -#define HV_X64_MSR_SVERSION HV_REGISTER_SVERSION
> -#define HV_X64_MSR_SIMP HV_REGISTER_SIMP
> -#define HV_X64_MSR_SIEFP HV_REGISTER_SIEFP
> -#define HV_X64_MSR_VP_INDEX HV_REGISTER_VP_INDEX
> -#define HV_X64_MSR_EOM HV_REGISTER_EOM
> -#define HV_X64_MSR_SINT0 HV_REGISTER_SINT0
> -#define HV_X64_MSR_SINT15 HV_REGISTER_SINT15
> -#define HV_X64_MSR_CRASH_P0 HV_REGISTER_CRASH_P0
> -#define HV_X64_MSR_CRASH_P1 HV_REGISTER_CRASH_P1
> -#define HV_X64_MSR_CRASH_P2 HV_REGISTER_CRASH_P2
> -#define HV_X64_MSR_CRASH_P3 HV_REGISTER_CRASH_P3
> -#define HV_X64_MSR_CRASH_P4 HV_REGISTER_CRASH_P4
> -#define HV_X64_MSR_CRASH_CTL HV_REGISTER_CRASH_CTL
> -#define HV_X64_MSR_TIME_REF_COUNT HV_REGISTER_TIME_REF_COUNT
> -#define HV_X64_MSR_REFERENCE_TSC HV_REGISTER_REFERENCE_TSC
> +/*
> + * To support non-arch-specific code calling hv_set/get_register:
> + * - On x86, HV_SYNTHETIC_REG_ indicates an MSR accessed via rdmsrl/wrmsrl
> + * - On ARM, HV_SYNTHETIC_REG_ indicates a VP register accessed via hypercall
Same here: "ARM64" instead of "ARM".
> + */
> +#define HV_SYNTHETIC_REG_VP_INDEX (HV_X64_MSR_VP_INDEX)
> +#define HV_SYNTHETIC_REG_TIME_REF_COUNT
> (HV_X64_MSR_TIME_REF_COUNT)
> +#define HV_SYNTHETIC_REG_REFERENCE_TSC
> (HV_X64_MSR_REFERENCE_TSC)
> +
> +#define HV_SYNTHETIC_REG_STIMER0_CONFIG
> (HV_X64_MSR_STIMER0_CONFIG)
> +#define HV_SYNTHETIC_REG_STIMER0_COUNT
> (HV_X64_MSR_STIMER0_COUNT)
> +
> +#define HV_SYNTHETIC_REG_SCONTROL (HV_X64_MSR_SCONTROL)
> +#define HV_SYNTHETIC_REG_SIEFP (HV_X64_MSR_SIEFP)
> +#define HV_SYNTHETIC_REG_SIMP (HV_X64_MSR_SIMP)
> +#define HV_SYNTHETIC_REG_EOM (HV_X64_MSR_EOM)
> +#define HV_SYNTHETIC_REG_SINT0 (HV_X64_MSR_SINT0)
> +
> +#define HV_SYNTHETIC_REG_CRASH_P0 (HV_X64_MSR_CRASH_P0)
> +#define HV_SYNTHETIC_REG_CRASH_P1 (HV_X64_MSR_CRASH_P1)
> +#define HV_SYNTHETIC_REG_CRASH_P2 (HV_X64_MSR_CRASH_P2)
> +#define HV_SYNTHETIC_REG_CRASH_P3 (HV_X64_MSR_CRASH_P3)
> +#define HV_SYNTHETIC_REG_CRASH_P4 (HV_X64_MSR_CRASH_P4)
> +#define HV_SYNTHETIC_REG_CRASH_CTL (HV_X64_MSR_CRASH_CTL)
>
> /* Hyper-V memory host visibility */
> enum hv_mem_host_visibility {
> diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
> index 4c4c0ec3b62e..1afa77ab9a04 100644
> --- a/arch/x86/include/asm/mshyperv.h
> +++ b/arch/x86/include/asm/mshyperv.h
> @@ -224,14 +224,14 @@ extern bool hv_isolation_type_snp(void);
>
> static inline bool hv_is_synic_reg(unsigned int reg)
Should this function name be changed to hv_is_synic_msr() since
it is based on MSR values and not register values? Argument
name should probably also be "msr", not "reg" to avoid
any confusion.
> {
> - return (reg >= HV_REGISTER_SCONTROL) &&
> - (reg <= HV_REGISTER_SINT15);
> + return (reg >= HV_X64_MSR_SCONTROL) &&
> + (reg <= HV_X64_MSR_SINT15);
> }
>
> static inline bool hv_is_sint_reg(unsigned int reg)
Same here.
> {
> - return (reg >= HV_REGISTER_SINT0) &&
> - (reg <= HV_REGISTER_SINT15);
> + return (reg >= HV_X64_MSR_SINT0) &&
> + (reg <= HV_X64_MSR_SINT15);
> }
>
> u64 hv_get_register(unsigned int reg);
> diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
> index f924a76c6923..7140ee32d7be 100644
> --- a/arch/x86/kernel/cpu/mshyperv.c
> +++ b/arch/x86/kernel/cpu/mshyperv.c
> @@ -45,19 +45,19 @@ struct ms_hyperv_info ms_hyperv;
> static inline unsigned int hv_get_nested_reg(unsigned int reg)
Same here.
> {
> if (hv_is_sint_reg(reg))
> - return reg - HV_REGISTER_SINT0 + HV_REGISTER_NESTED_SINT0;
> + return reg - HV_X64_MSR_SINT0 + HV_X64_MSR_NESTED_SINT0;
>
> switch (reg) {
> - case HV_REGISTER_SIMP:
> - return HV_REGISTER_NESTED_SIMP;
> - case HV_REGISTER_SIEFP:
> - return HV_REGISTER_NESTED_SIEFP;
> - case HV_REGISTER_SVERSION:
> - return HV_REGISTER_NESTED_SVERSION;
> - case HV_REGISTER_SCONTROL:
> - return HV_REGISTER_NESTED_SCONTROL;
> - case HV_REGISTER_EOM:
> - return HV_REGISTER_NESTED_EOM;
> + case HV_X64_MSR_SIMP:
> + return HV_X64_MSR_NESTED_SIMP;
> + case HV_X64_MSR_SIEFP:
> + return HV_X64_MSR_NESTED_SIEFP;
> + case HV_X64_MSR_SVERSION:
> + return HV_X64_MSR_NESTED_SVERSION;
> + case HV_X64_MSR_SCONTROL:
> + return HV_X64_MSR_NESTED_SCONTROL;
> + case HV_X64_MSR_EOM:
> + return HV_X64_MSR_NESTED_EOM;
> default:
> return reg;
> }
> diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c
> index c0cef92b12b8..0ab3fbca34c7 100644
> --- a/drivers/clocksource/hyperv_timer.c
> +++ b/drivers/clocksource/hyperv_timer.c
> @@ -81,14 +81,14 @@ static int hv_ce_set_next_event(unsigned long delta,
>
> current_tick = hv_read_reference_counter();
> current_tick += delta;
> - hv_set_register(HV_REGISTER_STIMER0_COUNT, current_tick);
> + hv_set_register(HV_SYNTHETIC_REG_STIMER0_COUNT, current_tick);
> return 0;
> }
>
> static int hv_ce_shutdown(struct clock_event_device *evt)
> {
> - hv_set_register(HV_REGISTER_STIMER0_COUNT, 0);
> - hv_set_register(HV_REGISTER_STIMER0_CONFIG, 0);
> + hv_set_register(HV_SYNTHETIC_REG_STIMER0_COUNT, 0);
> + hv_set_register(HV_SYNTHETIC_REG_STIMER0_CONFIG, 0);
> if (direct_mode_enabled && stimer0_irq >= 0)
> disable_percpu_irq(stimer0_irq);
>
> @@ -119,7 +119,7 @@ static int hv_ce_set_oneshot(struct clock_event_device *evt)
> timer_cfg.direct_mode = 0;
> timer_cfg.sintx = stimer0_message_sint;
> }
> - hv_set_register(HV_REGISTER_STIMER0_CONFIG, timer_cfg.as_uint64);
> + hv_set_register(HV_SYNTHETIC_REG_STIMER0_CONFIG, timer_cfg.as_uint64);
> return 0;
> }
>
> @@ -387,7 +387,7 @@ static u64 notrace read_hv_clock_tsc(void)
> u64 current_tick = hv_read_tsc_page(hv_get_tsc_page());
>
> if (current_tick == U64_MAX)
> - current_tick = hv_get_register(HV_REGISTER_TIME_REF_COUNT);
> + current_tick = hv_get_register(HV_SYNTHETIC_REG_TIME_REF_COUNT);
>
> return current_tick;
> }
> @@ -408,9 +408,9 @@ static void suspend_hv_clock_tsc(struct clocksource *arg)
> union hv_reference_tsc_msr tsc_msr;
>
> /* Disable the TSC page */
> - tsc_msr.as_uint64 = hv_get_register(HV_REGISTER_REFERENCE_TSC);
> + tsc_msr.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_REFERENCE_TSC);
> tsc_msr.enable = 0;
> - hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr.as_uint64);
> + hv_set_register(HV_SYNTHETIC_REG_REFERENCE_TSC, tsc_msr.as_uint64);
> }
>
>
> @@ -419,10 +419,10 @@ static void resume_hv_clock_tsc(struct clocksource *arg)
> union hv_reference_tsc_msr tsc_msr;
>
> /* Re-enable the TSC page */
> - tsc_msr.as_uint64 = hv_get_register(HV_REGISTER_REFERENCE_TSC);
> + tsc_msr.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_REFERENCE_TSC);
> tsc_msr.enable = 1;
> tsc_msr.pfn = tsc_pfn;
> - hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr.as_uint64);
> + hv_set_register(HV_SYNTHETIC_REG_REFERENCE_TSC, tsc_msr.as_uint64);
> }
>
> #ifdef HAVE_VDSO_CLOCKMODE_HVCLOCK
> @@ -456,7 +456,7 @@ static u64 notrace read_hv_clock_msr(void)
> * is set to 0 when the partition is created and is incremented in
> * 100 nanosecond units.
> */
> - return hv_get_register(HV_REGISTER_TIME_REF_COUNT);
> + return hv_get_register(HV_SYNTHETIC_REG_TIME_REF_COUNT);
> }
>
> static u64 notrace read_hv_clock_msr_cs(struct clocksource *arg)
> @@ -543,14 +543,14 @@ static bool __init hv_init_tsc_clocksource(void)
> * thus TSC clocksource will work even without the real TSC page
> * mapped.
> */
> - tsc_msr.as_uint64 = hv_get_register(HV_REGISTER_REFERENCE_TSC);
> + tsc_msr.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_REFERENCE_TSC);
> if (hv_root_partition)
> tsc_pfn = tsc_msr.pfn;
> else
> tsc_pfn = HVPFN_DOWN(virt_to_phys(tsc_page));
> tsc_msr.enable = 1;
> tsc_msr.pfn = tsc_pfn;
> - hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr.as_uint64);
> + hv_set_register(HV_SYNTHETIC_REG_REFERENCE_TSC, tsc_msr.as_uint64);
>
> clocksource_register_hz(&hyperv_cs_tsc, NSEC_PER_SEC/100);
>
> diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
> index 8b0dd8e5244d..319f21205a9c 100644
> --- a/drivers/hv/hv.c
> +++ b/drivers/hv/hv.c
> @@ -213,7 +213,7 @@ void hv_synic_enable_regs(unsigned int cpu)
> union hv_synic_scontrol sctrl;
>
> /* Setup the Synic's message page */
> - simp.as_uint64 = hv_get_register(HV_REGISTER_SIMP);
> + simp.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_SIMP);
> simp.simp_enabled = 1;
>
> if (hv_isolation_type_snp() || hv_root_partition) {
> @@ -227,10 +227,10 @@ void hv_synic_enable_regs(unsigned int cpu)
> >> HV_HYP_PAGE_SHIFT;
> }
>
> - hv_set_register(HV_REGISTER_SIMP, simp.as_uint64);
> + hv_set_register(HV_SYNTHETIC_REG_SIMP, simp.as_uint64);
>
> /* Setup the Synic's event page */
> - siefp.as_uint64 = hv_get_register(HV_REGISTER_SIEFP);
> + siefp.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_SIEFP);
> siefp.siefp_enabled = 1;
>
> if (hv_isolation_type_snp() || hv_root_partition) {
> @@ -245,12 +245,12 @@ void hv_synic_enable_regs(unsigned int cpu)
> >> HV_HYP_PAGE_SHIFT;
> }
>
> - hv_set_register(HV_REGISTER_SIEFP, siefp.as_uint64);
> + hv_set_register(HV_SYNTHETIC_REG_SIEFP, siefp.as_uint64);
>
> /* Setup the shared SINT. */
> if (vmbus_irq != -1)
> enable_percpu_irq(vmbus_irq, 0);
> - shared_sint.as_uint64 = hv_get_register(HV_REGISTER_SINT0 +
> + shared_sint.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_SINT0 +
> VMBUS_MESSAGE_SINT);
>
> shared_sint.vector = vmbus_interrupt;
> @@ -266,14 +266,14 @@ void hv_synic_enable_regs(unsigned int cpu)
> #else
> shared_sint.auto_eoi = 0;
> #endif
> - hv_set_register(HV_REGISTER_SINT0 + VMBUS_MESSAGE_SINT,
> + hv_set_register(HV_SYNTHETIC_REG_SINT0 + VMBUS_MESSAGE_SINT,
> shared_sint.as_uint64);
>
> /* Enable the global synic bit */
> - sctrl.as_uint64 = hv_get_register(HV_REGISTER_SCONTROL);
> + sctrl.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_SCONTROL);
> sctrl.enable = 1;
>
> - hv_set_register(HV_REGISTER_SCONTROL, sctrl.as_uint64);
> + hv_set_register(HV_SYNTHETIC_REG_SCONTROL, sctrl.as_uint64);
> }
>
> int hv_synic_init(unsigned int cpu)
> @@ -297,17 +297,17 @@ void hv_synic_disable_regs(unsigned int cpu)
> union hv_synic_siefp siefp;
> union hv_synic_scontrol sctrl;
>
> - shared_sint.as_uint64 = hv_get_register(HV_REGISTER_SINT0 +
> + shared_sint.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_SINT0 +
> VMBUS_MESSAGE_SINT);
>
> shared_sint.masked = 1;
>
> /* Need to correctly cleanup in the case of SMP!!! */
> /* Disable the interrupt */
> - hv_set_register(HV_REGISTER_SINT0 + VMBUS_MESSAGE_SINT,
> + hv_set_register(HV_SYNTHETIC_REG_SINT0 + VMBUS_MESSAGE_SINT,
> shared_sint.as_uint64);
>
> - simp.as_uint64 = hv_get_register(HV_REGISTER_SIMP);
> + simp.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_SIMP);
> /*
> * In Isolation VM, sim and sief pages are allocated by
> * paravisor. These pages also will be used by kdump
> @@ -322,9 +322,9 @@ void hv_synic_disable_regs(unsigned int cpu)
> simp.base_simp_gpa = 0;
> }
>
> - hv_set_register(HV_REGISTER_SIMP, simp.as_uint64);
> + hv_set_register(HV_SYNTHETIC_REG_SIMP, simp.as_uint64);
>
> - siefp.as_uint64 = hv_get_register(HV_REGISTER_SIEFP);
> + siefp.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_SIEFP);
> siefp.siefp_enabled = 0;
>
> if (hv_isolation_type_snp() || hv_root_partition) {
> @@ -334,12 +334,12 @@ void hv_synic_disable_regs(unsigned int cpu)
> siefp.base_siefp_gpa = 0;
> }
>
> - hv_set_register(HV_REGISTER_SIEFP, siefp.as_uint64);
> + hv_set_register(HV_SYNTHETIC_REG_SIEFP, siefp.as_uint64);
>
> /* Disable the global synic bit */
> - sctrl.as_uint64 = hv_get_register(HV_REGISTER_SCONTROL);
> + sctrl.as_uint64 = hv_get_register(HV_SYNTHETIC_REG_SCONTROL);
> sctrl.enable = 0;
> - hv_set_register(HV_REGISTER_SCONTROL, sctrl.as_uint64);
> + hv_set_register(HV_SYNTHETIC_REG_SCONTROL, sctrl.as_uint64);
>
> if (vmbus_irq != -1)
> disable_percpu_irq(vmbus_irq);
> diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c
> index 52a6f89ccdbd..77a68f16bc6e 100644
> --- a/drivers/hv/hv_common.c
> +++ b/drivers/hv/hv_common.c
> @@ -142,7 +142,7 @@ int hv_common_cpu_init(unsigned int cpu)
> *outputarg = (char *)(*inputarg) + HV_HYP_PAGE_SIZE;
> }
>
> - msr_vp_index = hv_get_register(HV_REGISTER_VP_INDEX);
> + msr_vp_index = hv_get_register(HV_SYNTHETIC_REG_VP_INDEX);
>
> hv_vp_index[cpu] = msr_vp_index;
>
> @@ -246,7 +246,7 @@ EXPORT_SYMBOL_GPL(hv_is_hibernation_supported);
> */
> static u64 __hv_read_ref_counter(void)
> {
> - return hv_get_register(HV_REGISTER_TIME_REF_COUNT);
> + return hv_get_register(HV_SYNTHETIC_REG_TIME_REF_COUNT);
> }
>
> u64 (*hv_read_reference_counter)(void) = __hv_read_ref_counter;
> diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
> index 1901556efe79..9ca8a7b73b81 100644
> --- a/drivers/hv/vmbus_drv.c
> +++ b/drivers/hv/vmbus_drv.c
> @@ -1405,17 +1405,17 @@ static void hv_kmsg_dump(struct kmsg_dumper
> *dumper,
> * contain the size of the panic data in that page. Rest of the
> * registers are no-op when the NOTIFY_MSG flag is set.
> */
> - hv_set_register(HV_REGISTER_CRASH_P0, 0);
> - hv_set_register(HV_REGISTER_CRASH_P1, 0);
> - hv_set_register(HV_REGISTER_CRASH_P2, 0);
> - hv_set_register(HV_REGISTER_CRASH_P3, virt_to_phys(hv_panic_page));
> - hv_set_register(HV_REGISTER_CRASH_P4, bytes_written);
> + hv_set_register(HV_SYNTHETIC_REG_CRASH_P0, 0);
> + hv_set_register(HV_SYNTHETIC_REG_CRASH_P1, 0);
> + hv_set_register(HV_SYNTHETIC_REG_CRASH_P2, 0);
> + hv_set_register(HV_SYNTHETIC_REG_CRASH_P3,
> virt_to_phys(hv_panic_page));
> + hv_set_register(HV_SYNTHETIC_REG_CRASH_P4, bytes_written);
>
> /*
> * Let Hyper-V know there is crash data available along with
> * the panic message.
> */
> - hv_set_register(HV_REGISTER_CRASH_CTL,
> + hv_set_register(HV_SYNTHETIC_REG_CRASH_CTL,
> (HV_CRASH_CTL_CRASH_NOTIFY | HV_CRASH_CTL_CRASH_NOTIFY_MSG));
> }
>
> @@ -1555,7 +1555,7 @@ static int vmbus_bus_init(void)
> * Register for panic kmsg callback only if the right
> * capability is supported by the hypervisor.
> */
> - hyperv_crash_ctl = hv_get_register(HV_REGISTER_CRASH_CTL);
> + hyperv_crash_ctl = hv_get_register(HV_SYNTHETIC_REG_CRASH_CTL);
> if (hyperv_crash_ctl & HV_CRASH_CTL_CRASH_NOTIFY_MSG)
> hv_kmsg_dump_register();
>
> diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
> index 8845a2eca339..76bf968d77a8 100644
> --- a/include/asm-generic/mshyperv.h
> +++ b/include/asm-generic/mshyperv.h
> @@ -147,7 +147,7 @@ static inline void vmbus_signal_eom(struct hv_message *msg,
> u32 old_msg_type)
> * possibly deliver another msg from the
> * hypervisor
> */
> - hv_set_register(HV_REGISTER_EOM, 0);
> + hv_set_register(HV_SYNTHETIC_REG_EOM, 0);
> }
> }
>
> --
> 2.25.1
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