x86/vmware: Add VMware-specific handling for VMMCALL under SEV-ES (1a222de8) · Commits · 戴 / test

arch/x86/kernel/cpu/vmware.c

+45 −5

Original line number	Diff line number	Diff line
		@@ -33,6 +33,7 @@
		#include <asm/timer.h>
		#include <asm/apic.h>
		#include <asm/vmware.h>
		#include <asm/svm.h>

		#undef pr_fmt
		#define pr_fmt(fmt) "vmware: " fmt
		@@ -476,10 +477,49 @@ static bool __init vmware_legacy_x2apic_available(void)
		(eax & (1 << VMWARE_CMD_LEGACY_X2APIC)) != 0;
		}

		#ifdef CONFIG_AMD_MEM_ENCRYPT
		static void vmware_sev_es_hcall_prepare(struct ghcb *ghcb,
		struct pt_regs *regs)
		{
		/* Copy VMWARE specific Hypercall parameters to the GHCB */
		ghcb_set_rip(ghcb, regs->ip);
		ghcb_set_rbx(ghcb, regs->bx);
		ghcb_set_rcx(ghcb, regs->cx);
		ghcb_set_rdx(ghcb, regs->dx);
		ghcb_set_rsi(ghcb, regs->si);
		ghcb_set_rdi(ghcb, regs->di);
		ghcb_set_rbp(ghcb, regs->bp);
		}

		static bool vmware_sev_es_hcall_finish(struct ghcb ghcb, struct pt_regs regs)
		{
		if (!(ghcb_rbx_is_valid(ghcb) &&
		ghcb_rcx_is_valid(ghcb) &&
		ghcb_rdx_is_valid(ghcb) &&
		ghcb_rsi_is_valid(ghcb) &&
		ghcb_rdi_is_valid(ghcb) &&
		ghcb_rbp_is_valid(ghcb)))
		return false;

		regs->bx = ghcb->save.rbx;
		regs->cx = ghcb->save.rcx;
		regs->dx = ghcb->save.rdx;
		regs->si = ghcb->save.rsi;
		regs->di = ghcb->save.rdi;
		regs->bp = ghcb->save.rbp;

		return true;
		}
		#endif

		const __initconst struct hypervisor_x86 x86_hyper_vmware = {
		.name = "VMware",
		.detect = vmware_platform,
		.type = X86_HYPER_VMWARE,
		.init.init_platform = vmware_platform_setup,
		.init.x2apic_available = vmware_legacy_x2apic_available,
		#ifdef CONFIG_AMD_MEM_ENCRYPT
		.runtime.sev_es_hcall_prepare = vmware_sev_es_hcall_prepare,
		.runtime.sev_es_hcall_finish = vmware_sev_es_hcall_finish,
		#endif
		};

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