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Date: Sat, 15 Jun 2024 08:21:46 -0000
From: "tip-bot2 for Alexey Makhalov" <tip-bot2@linutronix.de>
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Subject: [tip: x86/vmware] x86/vmware: Use VMware hypercall API
Cc: Alexey Makhalov <alexey.makhalov@broadcom.com>,
 "Borislav Petkov (AMD)" <bp@alien8.de>, x86@kernel.org,
 linux-kernel@vger.kernel.org
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The following commit has been merged into the x86/vmware branch of tip:

Commit-ID:     986fd97b9cc45fda0810b763ea403d0f280a4ac5
Gitweb:        https://git.kernel.org/tip/986fd97b9cc45fda0810b763ea403d0f280a4ac5
Author:        Alexey Makhalov <alexey.makhalov@broadcom.com>
AuthorDate:    Thu, 13 Jun 2024 12:16:47 -07:00
Committer:     Borislav Petkov (AMD) <bp@alien8.de>
CommitterDate: Fri, 14 Jun 2024 18:01:21 +02:00

x86/vmware: Use VMware hypercall API

Remove VMWARE_CMD macro and move to vmware_hypercall API.
No functional changes intended.

Use u32/u64 instead of uint32_t/uint64_t across the file.

Signed-off-by: Alexey Makhalov <alexey.makhalov@broadcom.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240613191650.9913-6-alexey.makhalov@broadcom.com
---
 arch/x86/kernel/cpu/vmware.c | 95 +++++++++--------------------------
 1 file changed, 25 insertions(+), 70 deletions(-)

diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c
index 533ac2d..c0a3ffa 100644
--- a/arch/x86/kernel/cpu/vmware.c
+++ b/arch/x86/kernel/cpu/vmware.c
@@ -49,54 +49,16 @@
 #define STEALCLOCK_DISABLED        0
 #define STEALCLOCK_ENABLED         1
 
-#define VMWARE_PORT(cmd, eax, ebx, ecx, edx)				\
-	__asm__("inl (%%dx), %%eax" :					\
-		"=a"(eax), "=c"(ecx), "=d"(edx), "=b"(ebx) :		\
-		"a"(VMWARE_HYPERVISOR_MAGIC),				\
-		"c"(VMWARE_CMD_##cmd),					\
-		"d"(VMWARE_HYPERVISOR_PORT), "b"(UINT_MAX) :		\
-		"memory")
-
-#define VMWARE_VMCALL(cmd, eax, ebx, ecx, edx)				\
-	__asm__("vmcall" :						\
-		"=a"(eax), "=c"(ecx), "=d"(edx), "=b"(ebx) :		\
-		"a"(VMWARE_HYPERVISOR_MAGIC),				\
-		"c"(VMWARE_CMD_##cmd),					\
-		"d"(0), "b"(UINT_MAX) :					\
-		"memory")
-
-#define VMWARE_VMMCALL(cmd, eax, ebx, ecx, edx)                         \
-	__asm__("vmmcall" :						\
-		"=a"(eax), "=c"(ecx), "=d"(edx), "=b"(ebx) :		\
-		"a"(VMWARE_HYPERVISOR_MAGIC),				\
-		"c"(VMWARE_CMD_##cmd),					\
-		"d"(0), "b"(UINT_MAX) :					\
-		"memory")
-
-#define VMWARE_CMD(cmd, eax, ebx, ecx, edx) do {		\
-	switch (vmware_hypercall_mode) {			\
-	case CPUID_VMWARE_FEATURES_ECX_VMCALL:			\
-		VMWARE_VMCALL(cmd, eax, ebx, ecx, edx);		\
-		break;						\
-	case CPUID_VMWARE_FEATURES_ECX_VMMCALL:			\
-		VMWARE_VMMCALL(cmd, eax, ebx, ecx, edx);	\
-		break;						\
-	default:						\
-		VMWARE_PORT(cmd, eax, ebx, ecx, edx);		\
-		break;						\
-	}							\
-	} while (0)
-
 struct vmware_steal_time {
 	union {
-		uint64_t clock;	/* stolen time counter in units of vtsc */
+		u64 clock;	/* stolen time counter in units of vtsc */
 		struct {
 			/* only for little-endian */
-			uint32_t clock_low;
-			uint32_t clock_high;
+			u32 clock_low;
+			u32 clock_high;
 		};
 	};
-	uint64_t reserved[7];
+	u64 reserved[7];
 };
 
 static unsigned long vmware_tsc_khz __ro_after_init;
@@ -154,9 +116,10 @@ unsigned long vmware_hypercall_slow(unsigned long cmd,
 
 static inline int __vmware_platform(void)
 {
-	uint32_t eax, ebx, ecx, edx;
-	VMWARE_CMD(GETVERSION, eax, ebx, ecx, edx);
-	return eax != (uint32_t)-1 && ebx == VMWARE_HYPERVISOR_MAGIC;
+	u32 eax, ebx, ecx;
+
+	eax = vmware_hypercall3(VMWARE_CMD_GETVERSION, 0, &ebx, &ecx);
+	return eax != UINT_MAX && ebx == VMWARE_HYPERVISOR_MAGIC;
 }
 
 static unsigned long vmware_get_tsc_khz(void)
@@ -208,21 +171,12 @@ static void __init vmware_cyc2ns_setup(void)
 	pr_info("using clock offset of %llu ns\n", d->cyc2ns_offset);
 }
 
-static int vmware_cmd_stealclock(uint32_t arg1, uint32_t arg2)
+static int vmware_cmd_stealclock(u32 addr_hi, u32 addr_lo)
 {
-	uint32_t result, info;
-
-	asm volatile (VMWARE_HYPERCALL :
-		"=a"(result),
-		"=c"(info) :
-		"a"(VMWARE_HYPERVISOR_MAGIC),
-		"b"(0),
-		"c"(VMWARE_CMD_STEALCLOCK),
-		"d"(0),
-		"S"(arg1),
-		"D"(arg2) :
-		"memory");
-	return result;
+	u32 info;
+
+	return vmware_hypercall5(VMWARE_CMD_STEALCLOCK, 0, 0, addr_hi, addr_lo,
+				 &info);
 }
 
 static bool stealclock_enable(phys_addr_t pa)
@@ -257,15 +211,15 @@ static bool vmware_is_stealclock_available(void)
  * Return:
  *      The steal clock reading in ns.
  */
-static uint64_t vmware_steal_clock(int cpu)
+static u64 vmware_steal_clock(int cpu)
 {
 	struct vmware_steal_time *steal = &per_cpu(vmw_steal_time, cpu);
-	uint64_t clock;
+	u64 clock;
 
 	if (IS_ENABLED(CONFIG_64BIT))
 		clock = READ_ONCE(steal->clock);
 	else {
-		uint32_t initial_high, low, high;
+		u32 initial_high, low, high;
 
 		do {
 			initial_high = READ_ONCE(steal->clock_high);
@@ -277,7 +231,7 @@ static uint64_t vmware_steal_clock(int cpu)
 			high = READ_ONCE(steal->clock_high);
 		} while (initial_high != high);
 
-		clock = ((uint64_t)high << 32) | low;
+		clock = ((u64)high << 32) | low;
 	}
 
 	return mul_u64_u32_shr(clock, vmware_cyc2ns.cyc2ns_mul,
@@ -431,13 +385,13 @@ static void __init vmware_set_capabilities(void)
 
 static void __init vmware_platform_setup(void)
 {
-	uint32_t eax, ebx, ecx, edx;
-	uint64_t lpj, tsc_khz;
+	u32 eax, ebx, ecx;
+	u64 lpj, tsc_khz;
 
-	VMWARE_CMD(GETHZ, eax, ebx, ecx, edx);
+	eax = vmware_hypercall3(VMWARE_CMD_GETHZ, UINT_MAX, &ebx, &ecx);
 
 	if (ebx != UINT_MAX) {
-		lpj = tsc_khz = eax | (((uint64_t)ebx) << 32);
+		lpj = tsc_khz = eax | (((u64)ebx) << 32);
 		do_div(tsc_khz, 1000);
 		WARN_ON(tsc_khz >> 32);
 		pr_info("TSC freq read from hypervisor : %lu.%03lu MHz\n",
@@ -488,7 +442,7 @@ static u8 __init vmware_select_hypercall(void)
  * If !boot_cpu_has(X86_FEATURE_HYPERVISOR), vmware_hypercall_mode
  * intentionally defaults to 0.
  */
-static uint32_t __init vmware_platform(void)
+static u32 __init vmware_platform(void)
 {
 	if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) {
 		unsigned int eax;
@@ -516,8 +470,9 @@ static uint32_t __init vmware_platform(void)
 /* Checks if hypervisor supports x2apic without VT-D interrupt remapping. */
 static bool __init vmware_legacy_x2apic_available(void)
 {
-	uint32_t eax, ebx, ecx, edx;
-	VMWARE_CMD(GETVCPU_INFO, eax, ebx, ecx, edx);
+	u32 eax;
+
+	eax = vmware_hypercall1(VMWARE_CMD_GETVCPU_INFO, 0);
 	return !(eax & BIT(VMWARE_CMD_VCPU_RESERVED)) &&
 		(eax & BIT(VMWARE_CMD_LEGACY_X2APIC));
 }