From: Tianyu Lan <[email protected]>
Rename hv_isolation_type_snp and hv_isolation_type_en_snp()
to make them much intuitiver.
Suggested-by: Vitaly Kuznetsov <[email protected]>
Signed-off-by: Tianyu Lan <[email protected]>
---
This patch is based on the patchset "x86/hyperv: Add AMD sev-snp
enlightened guest support on hyperv" https://lore.kernel.org/lkml/
[email protected]/T/.
arch/x86/hyperv/hv_init.c | 6 +++---
arch/x86/hyperv/ivm.c | 17 +++++++++--------
arch/x86/include/asm/mshyperv.h | 8 ++++----
arch/x86/kernel/cpu/mshyperv.c | 12 ++++++------
drivers/hv/connection.c | 2 +-
drivers/hv/hv.c | 16 ++++++++--------
drivers/hv/hv_common.c | 10 +++++-----
include/asm-generic/mshyperv.h | 4 ++--
8 files changed, 38 insertions(+), 37 deletions(-)
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index b004370d3b01..49054dc30604 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -52,7 +52,7 @@ static int hyperv_init_ghcb(void)
void *ghcb_va;
void **ghcb_base;
- if (!hv_isolation_type_snp())
+ if (!isol_type_snp_paravisor())
return 0;
if (!hv_ghcb_pg)
@@ -116,7 +116,7 @@ static int hv_cpu_init(unsigned int cpu)
* is blocked to run in Confidential VM. So only decrypt assist
* page in non-root partition here.
*/
- if (*hvp && hv_isolation_type_en_snp()) {
+ if (*hvp && isol_type_snp_enlightened()) {
WARN_ON_ONCE(set_memory_decrypted((unsigned long)(*hvp), 1));
memset(*hvp, 0, PAGE_SIZE);
}
@@ -453,7 +453,7 @@ void __init hyperv_init(void)
goto common_free;
}
- if (hv_isolation_type_snp()) {
+ if (isol_type_snp_paravisor()) {
/* Negotiate GHCB Version. */
if (!hv_ghcb_negotiate_protocol())
hv_ghcb_terminate(SEV_TERM_SET_GEN,
diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c
index 2eda4e69849d..2911c2525ed5 100644
--- a/arch/x86/hyperv/ivm.c
+++ b/arch/x86/hyperv/ivm.c
@@ -591,24 +591,25 @@ bool hv_is_isolation_supported(void)
return hv_get_isolation_type() != HV_ISOLATION_TYPE_NONE;
}
-DEFINE_STATIC_KEY_FALSE(isolation_type_snp);
+DEFINE_STATIC_KEY_FALSE(isol_type_snp_paravisor_flag);
/*
- * hv_isolation_type_snp - Check system runs in the AMD SEV-SNP based
+ * isol_type_snp_paravisor - Check system runs in the AMD SEV-SNP based
* isolation VM.
*/
-bool hv_isolation_type_snp(void)
+bool isol_type_snp_paravisor(void)
{
- return static_branch_unlikely(&isolation_type_snp);
+ return static_branch_unlikely(&isol_type_snp_paravisor_flag);
}
-DEFINE_STATIC_KEY_FALSE(isolation_type_en_snp);
+DEFINE_STATIC_KEY_FALSE(isol_type_snp_enlightened_flag);
+
/*
- * hv_isolation_type_en_snp - Check system runs in the AMD SEV-SNP based
+ * isol_type_snp_enlightened - Check system runs in the AMD SEV-SNP based
* isolation enlightened VM.
*/
-bool hv_isolation_type_en_snp(void)
+bool isol_type_snp_enlightened(void)
{
- return static_branch_unlikely(&isolation_type_en_snp);
+ return static_branch_unlikely(&isol_type_snp_enlightened_flag);
}
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index c5a3c29fad01..51eb239d71dd 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -25,8 +25,8 @@
union hv_ghcb;
-DECLARE_STATIC_KEY_FALSE(isolation_type_snp);
-DECLARE_STATIC_KEY_FALSE(isolation_type_en_snp);
+DECLARE_STATIC_KEY_FALSE(isol_type_snp_paravisor_flag);
+DECLARE_STATIC_KEY_FALSE(isol_type_snp_enlightened_flag);
typedef int (*hyperv_fill_flush_list_func)(
struct hv_guest_mapping_flush_list *flush,
@@ -46,7 +46,7 @@ extern void *hv_hypercall_pg;
extern u64 hv_current_partition_id;
-extern bool hv_isolation_type_en_snp(void);
+extern bool isol_type_snp_enlightened(void);
extern union hv_ghcb * __percpu *hv_ghcb_pg;
@@ -268,7 +268,7 @@ static inline void hv_sev_init_mem_and_cpu(void) {}
static int hv_snp_boot_ap(int cpu, unsigned long start_ip) {}
#endif
-extern bool hv_isolation_type_snp(void);
+extern bool isol_type_snp_paravisor(void);
static inline bool hv_is_synic_reg(unsigned int reg)
{
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 6ff0b60d30f9..d9dcee48099c 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -66,7 +66,7 @@ u64 hv_get_non_nested_register(unsigned int reg)
{
u64 value;
- if (hv_is_synic_reg(reg) && hv_isolation_type_snp())
+ if (hv_is_synic_reg(reg) && isol_type_snp_paravisor())
hv_ghcb_msr_read(reg, &value);
else
rdmsrl(reg, value);
@@ -76,7 +76,7 @@ EXPORT_SYMBOL_GPL(hv_get_non_nested_register);
void hv_set_non_nested_register(unsigned int reg, u64 value)
{
- if (hv_is_synic_reg(reg) && hv_isolation_type_snp()) {
+ if (hv_is_synic_reg(reg) && isol_type_snp_paravisor()) {
hv_ghcb_msr_write(reg, value);
/* Write proxy bit via wrmsl instruction */
@@ -300,7 +300,7 @@ static void __init hv_smp_prepare_cpus(unsigned int max_cpus)
* Override wakeup_secondary_cpu_64 callback for SEV-SNP
* enlightened guest.
*/
- if (hv_isolation_type_en_snp())
+ if (isol_type_snp_enlightened())
apic->wakeup_secondary_cpu_64 = hv_snp_boot_ap;
if (!hv_root_partition)
@@ -421,9 +421,9 @@ static void __init ms_hyperv_init_platform(void)
if (cc_platform_has(CC_ATTR_GUEST_SEV_SNP)) {
- static_branch_enable(&isolation_type_en_snp);
+ static_branch_enable(&isol_type_snp_enlightened_flag);
} else if (hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP) {
- static_branch_enable(&isolation_type_snp);
+ static_branch_enable(&isol_type_snp_paravisor_flag);
}
}
@@ -545,7 +545,7 @@ static void __init ms_hyperv_init_platform(void)
if (!(ms_hyperv.features & HV_ACCESS_TSC_INVARIANT))
mark_tsc_unstable("running on Hyper-V");
- if (hv_isolation_type_en_snp())
+ if (isol_type_snp_enlightened())
hv_sev_init_mem_and_cpu();
hardlockup_detector_disable();
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 02b54f85dc60..8659d18a55fe 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -484,7 +484,7 @@ void vmbus_set_event(struct vmbus_channel *channel)
++channel->sig_events;
- if (hv_isolation_type_snp())
+ if (isol_type_snp_paravisor())
hv_ghcb_hypercall(HVCALL_SIGNAL_EVENT, &channel->sig_event,
NULL, sizeof(channel->sig_event));
else
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index ec6e35a0d9bf..7651d79205da 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -64,7 +64,7 @@ int hv_post_message(union hv_connection_id connection_id,
aligned_msg->payload_size = payload_size;
memcpy((void *)aligned_msg->payload, payload, payload_size);
- if (hv_isolation_type_snp())
+ if (isol_type_snp_paravisor())
status = hv_ghcb_hypercall(HVCALL_POST_MESSAGE,
(void *)aligned_msg, NULL,
sizeof(*aligned_msg));
@@ -109,7 +109,7 @@ int hv_synic_alloc(void)
* Synic message and event pages are allocated by paravisor.
* Skip these pages allocation here.
*/
- if (!hv_isolation_type_snp() && !hv_root_partition) {
+ if (!isol_type_snp_paravisor() && !hv_root_partition) {
hv_cpu->synic_message_page =
(void *)get_zeroed_page(GFP_ATOMIC);
if (hv_cpu->synic_message_page == NULL) {
@@ -125,7 +125,7 @@ int hv_synic_alloc(void)
}
}
- if (hv_isolation_type_en_snp()) {
+ if (isol_type_snp_enlightened()) {
ret = set_memory_decrypted((unsigned long)
hv_cpu->synic_message_page, 1);
if (ret) {
@@ -174,7 +174,7 @@ void hv_synic_free(void)
= per_cpu_ptr(hv_context.cpu_context, cpu);
/* It's better to leak the page if the encryption fails. */
- if (hv_isolation_type_en_snp()) {
+ if (isol_type_snp_enlightened()) {
if (hv_cpu->synic_message_page) {
ret = set_memory_encrypted((unsigned long)
hv_cpu->synic_message_page, 1);
@@ -221,7 +221,7 @@ void hv_synic_enable_regs(unsigned int cpu)
simp.as_uint64 = hv_get_register(HV_REGISTER_SIMP);
simp.simp_enabled = 1;
- if (hv_isolation_type_snp() || hv_root_partition) {
+ if (isol_type_snp_paravisor() || hv_root_partition) {
/* Mask out vTOM bit. ioremap_cache() maps decrypted */
u64 base = (simp.base_simp_gpa << HV_HYP_PAGE_SHIFT) &
~ms_hyperv.shared_gpa_boundary;
@@ -240,7 +240,7 @@ void hv_synic_enable_regs(unsigned int cpu)
siefp.as_uint64 = hv_get_register(HV_REGISTER_SIEFP);
siefp.siefp_enabled = 1;
- if (hv_isolation_type_snp() || hv_root_partition) {
+ if (isol_type_snp_paravisor() || hv_root_partition) {
/* Mask out vTOM bit. ioremap_cache() maps decrypted */
u64 base = (siefp.base_siefp_gpa << HV_HYP_PAGE_SHIFT) &
~ms_hyperv.shared_gpa_boundary;
@@ -323,7 +323,7 @@ void hv_synic_disable_regs(unsigned int cpu)
* addresses.
*/
simp.simp_enabled = 0;
- if (hv_isolation_type_snp() || hv_root_partition) {
+ if (isol_type_snp_paravisor() || hv_root_partition) {
iounmap(hv_cpu->synic_message_page);
hv_cpu->synic_message_page = NULL;
} else {
@@ -335,7 +335,7 @@ void hv_synic_disable_regs(unsigned int cpu)
siefp.as_uint64 = hv_get_register(HV_REGISTER_SIEFP);
siefp.siefp_enabled = 0;
- if (hv_isolation_type_snp() || hv_root_partition) {
+ if (isol_type_snp_paravisor() || hv_root_partition) {
iounmap(hv_cpu->synic_event_page);
hv_cpu->synic_event_page = NULL;
} else {
diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c
index 2d43ba2bc925..527e91409ef7 100644
--- a/drivers/hv/hv_common.c
+++ b/drivers/hv/hv_common.c
@@ -381,7 +381,7 @@ int hv_common_cpu_init(unsigned int cpu)
*outputarg = (char *)(*inputarg) + HV_HYP_PAGE_SIZE;
}
- if (hv_isolation_type_en_snp()) {
+ if (isol_type_snp_enlightened()) {
ret = set_memory_decrypted((unsigned long)*inputarg, pgcount);
if (ret) {
kfree(*inputarg);
@@ -509,17 +509,17 @@ bool __weak hv_is_isolation_supported(void)
}
EXPORT_SYMBOL_GPL(hv_is_isolation_supported);
-bool __weak hv_isolation_type_snp(void)
+bool __weak isol_type_snp_paravisor(void)
{
return false;
}
-EXPORT_SYMBOL_GPL(hv_isolation_type_snp);
+EXPORT_SYMBOL_GPL(isol_type_snp_paravisor);
-bool __weak hv_isolation_type_en_snp(void)
+bool __weak isol_type_snp_enlightened(void)
{
return false;
}
-EXPORT_SYMBOL_GPL(hv_isolation_type_en_snp);
+EXPORT_SYMBOL_GPL(isol_type_snp_enlightened);
void __weak hv_setup_vmbus_handler(void (*handler)(void))
{
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
index f73a044ecaa7..d60a9306c0cc 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -64,7 +64,7 @@ extern void * __percpu *hyperv_pcpu_output_arg;
extern u64 hv_do_hypercall(u64 control, void *inputaddr, void *outputaddr);
extern u64 hv_do_fast_hypercall8(u16 control, u64 input8);
-extern bool hv_isolation_type_snp(void);
+extern bool isol_type_snp_paravisor(void);
/* Helper functions that provide a consistent pattern for checking Hyper-V hypercall status. */
static inline int hv_result(u64 status)
@@ -279,7 +279,7 @@ bool hv_is_hyperv_initialized(void);
bool hv_is_hibernation_supported(void);
enum hv_isolation_type hv_get_isolation_type(void);
bool hv_is_isolation_supported(void);
-bool hv_isolation_type_snp(void);
+bool isol_type_snp_paravisor(void);
u64 hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_size);
void hyperv_cleanup(void);
bool hv_query_ext_cap(u64 cap_query);
--
2.25.1
Tianyu Lan <[email protected]> writes:
> From: Tianyu Lan <[email protected]>
>
> Rename hv_isolation_type_snp and hv_isolation_type_en_snp()
> to make them much intuitiver.
>
> Suggested-by: Vitaly Kuznetsov <[email protected]>
> Signed-off-by: Tianyu Lan <[email protected]>
Thanks for the patch! A few comments below ...
> ---
> This patch is based on the patchset "x86/hyperv: Add AMD sev-snp
> enlightened guest support on hyperv" https://lore.kernel.org/lkml/
> [email protected]/T/.
>
> arch/x86/hyperv/hv_init.c | 6 +++---
> arch/x86/hyperv/ivm.c | 17 +++++++++--------
> arch/x86/include/asm/mshyperv.h | 8 ++++----
> arch/x86/kernel/cpu/mshyperv.c | 12 ++++++------
> drivers/hv/connection.c | 2 +-
> drivers/hv/hv.c | 16 ++++++++--------
> drivers/hv/hv_common.c | 10 +++++-----
> include/asm-generic/mshyperv.h | 4 ++--
> 8 files changed, 38 insertions(+), 37 deletions(-)
>
> diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
> index b004370d3b01..49054dc30604 100644
> --- a/arch/x86/hyperv/hv_init.c
> +++ b/arch/x86/hyperv/hv_init.c
> @@ -52,7 +52,7 @@ static int hyperv_init_ghcb(void)
> void *ghcb_va;
> void **ghcb_base;
>
> - if (!hv_isolation_type_snp())
> + if (!isol_type_snp_paravisor())
> return 0;
>
> if (!hv_ghcb_pg)
> @@ -116,7 +116,7 @@ static int hv_cpu_init(unsigned int cpu)
> * is blocked to run in Confidential VM. So only decrypt assist
> * page in non-root partition here.
> */
> - if (*hvp && hv_isolation_type_en_snp()) {
> + if (*hvp && isol_type_snp_enlightened()) {
> WARN_ON_ONCE(set_memory_decrypted((unsigned long)(*hvp), 1));
> memset(*hvp, 0, PAGE_SIZE);
> }
> @@ -453,7 +453,7 @@ void __init hyperv_init(void)
> goto common_free;
> }
>
> - if (hv_isolation_type_snp()) {
> + if (isol_type_snp_paravisor()) {
> /* Negotiate GHCB Version. */
> if (!hv_ghcb_negotiate_protocol())
> hv_ghcb_terminate(SEV_TERM_SET_GEN,
> diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c
> index 2eda4e69849d..2911c2525ed5 100644
> --- a/arch/x86/hyperv/ivm.c
> +++ b/arch/x86/hyperv/ivm.c
> @@ -591,24 +591,25 @@ bool hv_is_isolation_supported(void)
> return hv_get_isolation_type() != HV_ISOLATION_TYPE_NONE;
> }
>
> -DEFINE_STATIC_KEY_FALSE(isolation_type_snp);
> +DEFINE_STATIC_KEY_FALSE(isol_type_snp_paravisor_flag);
>
> /*
> - * hv_isolation_type_snp - Check system runs in the AMD SEV-SNP based
> + * isol_type_snp_paravisor - Check system runs in the AMD SEV-SNP based
> * isolation VM.
> */
> -bool hv_isolation_type_snp(void)
> +bool isol_type_snp_paravisor(void)
I think that it would be better to keep 'hv_' prefix here for two reasons:
...
> {
> - return static_branch_unlikely(&isolation_type_snp);
> + return static_branch_unlikely(&isol_type_snp_paravisor_flag);
...
First reason is that it would be possible to drop '_flag' suffix here.
...
> }
>
> -DEFINE_STATIC_KEY_FALSE(isolation_type_en_snp);
> +DEFINE_STATIC_KEY_FALSE(isol_type_snp_enlightened_flag);
> +
> /*
> - * hv_isolation_type_en_snp - Check system runs in the AMD SEV-SNP based
> + * isol_type_snp_enlightened - Check system runs in the AMD SEV-SNP based
> * isolation enlightened VM.
> */
> -bool hv_isolation_type_en_snp(void)
> +bool isol_type_snp_enlightened(void)
> {
> - return static_branch_unlikely(&isolation_type_en_snp);
> + return static_branch_unlikely(&isol_type_snp_enlightened_flag);
> }
>
> diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
> index c5a3c29fad01..51eb239d71dd 100644
> --- a/arch/x86/include/asm/mshyperv.h
> +++ b/arch/x86/include/asm/mshyperv.h
> @@ -25,8 +25,8 @@
>
> union hv_ghcb;
>
> -DECLARE_STATIC_KEY_FALSE(isolation_type_snp);
> -DECLARE_STATIC_KEY_FALSE(isolation_type_en_snp);
> +DECLARE_STATIC_KEY_FALSE(isol_type_snp_paravisor_flag);
> +DECLARE_STATIC_KEY_FALSE(isol_type_snp_enlightened_flag);
>
> typedef int (*hyperv_fill_flush_list_func)(
> struct hv_guest_mapping_flush_list *flush,
> @@ -46,7 +46,7 @@ extern void *hv_hypercall_pg;
>
> extern u64 hv_current_partition_id;
>
> -extern bool hv_isolation_type_en_snp(void);
> +extern bool isol_type_snp_enlightened(void);
>
> extern union hv_ghcb * __percpu *hv_ghcb_pg;
>
> @@ -268,7 +268,7 @@ static inline void hv_sev_init_mem_and_cpu(void) {}
> static int hv_snp_boot_ap(int cpu, unsigned long start_ip) {}
> #endif
>
> -extern bool hv_isolation_type_snp(void);
> +extern bool isol_type_snp_paravisor(void);
>
> static inline bool hv_is_synic_reg(unsigned int reg)
> {
> diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
> index 6ff0b60d30f9..d9dcee48099c 100644
> --- a/arch/x86/kernel/cpu/mshyperv.c
> +++ b/arch/x86/kernel/cpu/mshyperv.c
> @@ -66,7 +66,7 @@ u64 hv_get_non_nested_register(unsigned int reg)
> {
> u64 value;
>
> - if (hv_is_synic_reg(reg) && hv_isolation_type_snp())
> + if (hv_is_synic_reg(reg) && isol_type_snp_paravisor())
> hv_ghcb_msr_read(reg, &value);
> else
> rdmsrl(reg, value);
> @@ -76,7 +76,7 @@ EXPORT_SYMBOL_GPL(hv_get_non_nested_register);
>
> void hv_set_non_nested_register(unsigned int reg, u64 value)
> {
> - if (hv_is_synic_reg(reg) && hv_isolation_type_snp()) {
> + if (hv_is_synic_reg(reg) && isol_type_snp_paravisor()) {
> hv_ghcb_msr_write(reg, value);
>
> /* Write proxy bit via wrmsl instruction */
> @@ -300,7 +300,7 @@ static void __init hv_smp_prepare_cpus(unsigned int max_cpus)
> * Override wakeup_secondary_cpu_64 callback for SEV-SNP
> * enlightened guest.
> */
> - if (hv_isolation_type_en_snp())
> + if (isol_type_snp_enlightened())
> apic->wakeup_secondary_cpu_64 = hv_snp_boot_ap;
>
> if (!hv_root_partition)
> @@ -421,9 +421,9 @@ static void __init ms_hyperv_init_platform(void)
>
>
> if (cc_platform_has(CC_ATTR_GUEST_SEV_SNP)) {
> - static_branch_enable(&isolation_type_en_snp);
> + static_branch_enable(&isol_type_snp_enlightened_flag);
> } else if (hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP) {
> - static_branch_enable(&isolation_type_snp);
> + static_branch_enable(&isol_type_snp_paravisor_flag);
> }
> }
>
> @@ -545,7 +545,7 @@ static void __init ms_hyperv_init_platform(void)
> if (!(ms_hyperv.features & HV_ACCESS_TSC_INVARIANT))
> mark_tsc_unstable("running on Hyper-V");
>
> - if (hv_isolation_type_en_snp())
> + if (isol_type_snp_enlightened())
> hv_sev_init_mem_and_cpu();
>
> hardlockup_detector_disable();
> diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
> index 02b54f85dc60..8659d18a55fe 100644
> --- a/drivers/hv/connection.c
> +++ b/drivers/hv/connection.c
> @@ -484,7 +484,7 @@ void vmbus_set_event(struct vmbus_channel *channel)
>
> ++channel->sig_events;
>
> - if (hv_isolation_type_snp())
> + if (isol_type_snp_paravisor())
> hv_ghcb_hypercall(HVCALL_SIGNAL_EVENT, &channel->sig_event,
> NULL, sizeof(channel->sig_event));
> else
> diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
> index ec6e35a0d9bf..7651d79205da 100644
> --- a/drivers/hv/hv.c
> +++ b/drivers/hv/hv.c
> @@ -64,7 +64,7 @@ int hv_post_message(union hv_connection_id connection_id,
> aligned_msg->payload_size = payload_size;
> memcpy((void *)aligned_msg->payload, payload, payload_size);
>
> - if (hv_isolation_type_snp())
> + if (isol_type_snp_paravisor())
> status = hv_ghcb_hypercall(HVCALL_POST_MESSAGE,
> (void *)aligned_msg, NULL,
> sizeof(*aligned_msg));
> @@ -109,7 +109,7 @@ int hv_synic_alloc(void)
> * Synic message and event pages are allocated by paravisor.
> * Skip these pages allocation here.
> */
> - if (!hv_isolation_type_snp() && !hv_root_partition) {
> + if (!isol_type_snp_paravisor() && !hv_root_partition) {
> hv_cpu->synic_message_page =
> (void *)get_zeroed_page(GFP_ATOMIC);
> if (hv_cpu->synic_message_page == NULL) {
> @@ -125,7 +125,7 @@ int hv_synic_alloc(void)
> }
> }
>
> - if (hv_isolation_type_en_snp()) {
> + if (isol_type_snp_enlightened()) {
> ret = set_memory_decrypted((unsigned long)
> hv_cpu->synic_message_page, 1);
> if (ret) {
> @@ -174,7 +174,7 @@ void hv_synic_free(void)
> = per_cpu_ptr(hv_context.cpu_context, cpu);
>
> /* It's better to leak the page if the encryption fails. */
> - if (hv_isolation_type_en_snp()) {
> + if (isol_type_snp_enlightened()) {
> if (hv_cpu->synic_message_page) {
> ret = set_memory_encrypted((unsigned long)
> hv_cpu->synic_message_page, 1);
> @@ -221,7 +221,7 @@ void hv_synic_enable_regs(unsigned int cpu)
> simp.as_uint64 = hv_get_register(HV_REGISTER_SIMP);
> simp.simp_enabled = 1;
>
> - if (hv_isolation_type_snp() || hv_root_partition) {
> + if (isol_type_snp_paravisor() || hv_root_partition) {
> /* Mask out vTOM bit. ioremap_cache() maps decrypted */
> u64 base = (simp.base_simp_gpa << HV_HYP_PAGE_SHIFT) &
> ~ms_hyperv.shared_gpa_boundary;
> @@ -240,7 +240,7 @@ void hv_synic_enable_regs(unsigned int cpu)
> siefp.as_uint64 = hv_get_register(HV_REGISTER_SIEFP);
> siefp.siefp_enabled = 1;
>
> - if (hv_isolation_type_snp() || hv_root_partition) {
> + if (isol_type_snp_paravisor() || hv_root_partition) {
> /* Mask out vTOM bit. ioremap_cache() maps decrypted */
> u64 base = (siefp.base_siefp_gpa << HV_HYP_PAGE_SHIFT) &
> ~ms_hyperv.shared_gpa_boundary;
> @@ -323,7 +323,7 @@ void hv_synic_disable_regs(unsigned int cpu)
> * addresses.
> */
> simp.simp_enabled = 0;
> - if (hv_isolation_type_snp() || hv_root_partition) {
> + if (isol_type_snp_paravisor() || hv_root_partition) {
> iounmap(hv_cpu->synic_message_page);
> hv_cpu->synic_message_page = NULL;
> } else {
> @@ -335,7 +335,7 @@ void hv_synic_disable_regs(unsigned int cpu)
> siefp.as_uint64 = hv_get_register(HV_REGISTER_SIEFP);
> siefp.siefp_enabled = 0;
>
> - if (hv_isolation_type_snp() || hv_root_partition) {
> + if (isol_type_snp_paravisor() || hv_root_partition) {
> iounmap(hv_cpu->synic_event_page);
> hv_cpu->synic_event_page = NULL;
> } else {
> diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c
> index 2d43ba2bc925..527e91409ef7 100644
> --- a/drivers/hv/hv_common.c
> +++ b/drivers/hv/hv_common.c
> @@ -381,7 +381,7 @@ int hv_common_cpu_init(unsigned int cpu)
> *outputarg = (char *)(*inputarg) + HV_HYP_PAGE_SIZE;
> }
>
> - if (hv_isolation_type_en_snp()) {
> + if (isol_type_snp_enlightened()) {
> ret = set_memory_decrypted((unsigned long)*inputarg, pgcount);
> if (ret) {
> kfree(*inputarg);
> @@ -509,17 +509,17 @@ bool __weak hv_is_isolation_supported(void)
> }
> EXPORT_SYMBOL_GPL(hv_is_isolation_supported);
>
> -bool __weak hv_isolation_type_snp(void)
> +bool __weak isol_type_snp_paravisor(void)
> {
> return false;
> }
> -EXPORT_SYMBOL_GPL(hv_isolation_type_snp);
> +EXPORT_SYMBOL_GPL(isol_type_snp_paravisor);
>
> -bool __weak hv_isolation_type_en_snp(void)
> +bool __weak isol_type_snp_enlightened(void)
> {
> return false;
> }
> -EXPORT_SYMBOL_GPL(hv_isolation_type_en_snp);
> +EXPORT_SYMBOL_GPL(isol_type_snp_enlightened);
>
> void __weak hv_setup_vmbus_handler(void (*handler)(void))
> {
> diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
> index f73a044ecaa7..d60a9306c0cc 100644
> --- a/include/asm-generic/mshyperv.h
> +++ b/include/asm-generic/mshyperv.h
> @@ -64,7 +64,7 @@ extern void * __percpu *hyperv_pcpu_output_arg;
>
> extern u64 hv_do_hypercall(u64 control, void *inputaddr, void *outputaddr);
> extern u64 hv_do_fast_hypercall8(u16 control, u64 input8);
> -extern bool hv_isolation_type_snp(void);
> +extern bool isol_type_snp_paravisor(void);
>
> /* Helper functions that provide a consistent pattern for checking Hyper-V hypercall status. */
> static inline int hv_result(u64 status)
> @@ -279,7 +279,7 @@ bool hv_is_hyperv_initialized(void);
> bool hv_is_hibernation_supported(void);
> enum hv_isolation_type hv_get_isolation_type(void);
> bool hv_is_isolation_supported(void);
> -bool hv_isolation_type_snp(void);
> +bool isol_type_snp_paravisor(void);
> u64 hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_size);
> void hyperv_cleanup(void);
> bool hv_query_ext_cap(u64 cap_query);
...
Second reason is that 'isol_type_snp_paravisor'/'isol_type_snp_enlightened'
are exported and present in headers, it is unclear that these are
Hyper-V related.
--
Vitaly
On 7/25/2023 11:22 PM, Vitaly Kuznetsov wrote:
> Tianyu Lan <[email protected]> writes:
>
>> From: Tianyu Lan <[email protected]>
>>
>> Rename hv_isolation_type_snp and hv_isolation_type_en_snp()
>> to make them much intuitiver.
>>
>> Suggested-by: Vitaly Kuznetsov <[email protected]>
>> Signed-off-by: Tianyu Lan <[email protected]>
>
> Thanks for the patch! A few comments below ...
>
>> ---
>> This patch is based on the patchset "x86/hyperv: Add AMD sev-snp
>> enlightened guest support on hyperv" https://lore.kernel.org/lkml/
>> [email protected]/T/.
>>
>> arch/x86/hyperv/hv_init.c | 6 +++---
>> arch/x86/hyperv/ivm.c | 17 +++++++++--------
>> arch/x86/include/asm/mshyperv.h | 8 ++++----
>> arch/x86/kernel/cpu/mshyperv.c | 12 ++++++------
>> drivers/hv/connection.c | 2 +-
>> drivers/hv/hv.c | 16 ++++++++--------
>> drivers/hv/hv_common.c | 10 +++++-----
>> include/asm-generic/mshyperv.h | 4 ++--
>> 8 files changed, 38 insertions(+), 37 deletions(-)
>>
>> diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c
>> index 2eda4e69849d..2911c2525ed5 100644
>> --- a/arch/x86/hyperv/ivm.c
>> +++ b/arch/x86/hyperv/ivm.c
>> @@ -591,24 +591,25 @@ bool hv_is_isolation_supported(void)
>> return hv_get_isolation_type() != HV_ISOLATION_TYPE_NONE;
>> }
>>
>> -DEFINE_STATIC_KEY_FALSE(isolation_type_snp);
>> +DEFINE_STATIC_KEY_FALSE(isol_type_snp_paravisor_flag);
>>
>> /*
>> - * hv_isolation_type_snp - Check system runs in the AMD SEV-SNP based
>> + * isol_type_snp_paravisor - Check system runs in the AMD SEV-SNP based
>> * isolation VM.
>> */
>> -bool hv_isolation_type_snp(void)
>> +bool isol_type_snp_paravisor(void)
>
>
> I think that it would be better to keep 'hv_' prefix here for two reasons:
> ...
>
Agree. Will update.
Thanks.